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Патент USA US3071804

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Jan. 8, 1963
C. J. PRANGE
3,071,794
REEL FEED MECHANISM FOR FEEDING AND ROTAT ING
SEWER CLEANING TOOL DRIVE ROD
Filed Aug. 30, 1960
4 Sheets-Sheet l
'
K:
“W "
INVEN'ILOR
[mews =1 PEA/V65
.
ATTORNEY
Jan. 8, 1963
c. J. PRANGE
_
3,071,794
REEL FEED MECHANISM FOR FEEDING AND ROTATING
SEWER CLEANING TOOL DRIVE ROD
Filed Aug. 30, 1960
4 Sheets-Sheet 2
Jan. 8, 1963
C_ J_ PRANGE
REEL FEED MECHANISM FOR FEEDING AND ROTATING
SEWER CLEANING TOOL DRIVE ROD.
Filed Aug. 30, 1960
3,071,794
4 Sheets-sheaf 3
INVENTOR
[HARLE3/rj PEA/V65
AT'foRNEY
'
' Jan. '8, 1963
c. J. PRANGE
3,071,794
REEL FEED MECHANISM FOR FEEDING AND ROTATING
SEWER CLEANING TOOL DRIVE ROD
Filed Aug. 30, 1960
4 Sheets-Sheet 4
@ QM.
ER“
INVENTOR
0mm. 5.5 J PRANGE
BY
3/
ATTORNEY
United States Patent O?tice
3,071,794
Plti‘tented Jan. 8, 1963
2t
removable ‘to accommodate. servicing and assembly of
the feed unit with respect to the reel unit.
REEL'FEED
MECHANISM
$371,763.13‘,
F91’; FEEDING AND Rt)
TAIING SEWER iCLEANING TFOQL DRIVE ROD
A further object is to provide. a drive rod feed apparatus,
which isselectively operable: (7a)’ to effect projection and
tool Corporation, Lima, Oliio,‘a corporation of Ohio
Filed Aug. 30, 1960;‘Ser. No‘. 52,968v
19 Claims. (Cl. 1'5?-'104’.3)'
selectively eifect at variable sped, rotation of the drive
rod while either projecting or retracting,‘ it; and (c) to' sea
This inventionrelates to the feeding and rotating of a
tudinalmovement. More'speci?cally, ‘in this regard, the
Charles]; Prange,'Lima‘,-?hid,‘ assignor' t'o Flexible Sewer
sewer’ cleaning drive rod such as isusecl in operating a‘
rotatable’ sewer cleaning tool, and has as'_its general o_b~
je‘ct to’providve an improved drive rod handling apparatus
including a reel for storing; the drive rod, and mechanism
retraction of the drive rod, without rotation thereof; (b) to
lectively e??ect rotation of the drive rod without longi-t
10
feed apparatus embodies drive transmission and control
apparatus such that by holding the feedunit against rota-v
tion, While driving the reel in one direction, the drive rod
will be projected without being rotated; by holding the
forgunreeling the rod, rotating-it and feeding it forwardly,‘
feed unit against rotation while rotating the reel in they
and retracting it back into the reel. _
opposite direction, the drive rod will be retractedywithout
being rotated; by turning both units forwardly with the
In "the past, it has been the practice to utilize a jointed
rod for “driving, sewer cleaning toolse-one in which sec?
tions of rod of limited length were coupled together by
feed unit rotating ahead of the reel unit, the drive rod will
threading one end of a drive rod section into an internally
threaded-socket integral with the other end of an adjoin 20
ing section; The joints between the‘ rods were‘ utilized
not only for coupling the sections: together but also for
positive‘, meshing engagement with drive means moving
be projected and rotated; by turning both these units for
wardly with the reel unit turning ahead of the feed unit,
the drive rod will be retracted and simultaneously rotated;
andby turning both units forwardly at the same speed, the
drive rod will be rotated without longitudinal movement‘.
Thus both projection and retraction are accomplished by
along the axis of feed ‘of the'drive rod from'the reel, for
selective directional rotation of the reel unit with respect to
positively movingthe rod out of‘ the reel and retracting 25 the‘ feed unit, withthe feedunit turning when it, is. desired
itjinto the reel. Such drive rods were expensive because
to rotated-1e drive‘ rod, and with the feed unit held sta
of- the many couplings utilized in joining the sections to
tionary when it is desired to effect projection or retraction
gether', and the feedingapparatus was fairly complicated,
vwfthoutrotation, ,as may be,_called for vby the conditions
bulky'and cumbersome. One of the objects of the present
encountered inthe operation. ,
invention is'to provide animproved‘sewer' cleaning tool‘ 30 ,Qther objects and advantages will become apparent in
driving apparatus utilizing a continuous drive rod of uni:
the ensuing speci?cations and appended drawings in
form cross section without joints, and an improved reel
which:
type feed ‘mechanism for reeling, unreelin'g,'rotating,for
ward feeding and retracting such uniform unjointed drive
rod with a positive feed.
,
r
.
_ FIG, 1 is aside view of a reel feed apparatus embodying
my invention;
35
More speci?cally, the invention contemplatesian appa
7
_ _
.
__FIG. 1a is a fragmentary sectional view through adja
cent, portions of the feed unit and reel unit at the point
ratus for positively p‘rojectin'gand‘ retracting a‘ smooth;
where the‘ drive rod is guided through the ?ange of'the
surface, uniformiscction drive" rod without the‘ necessity
feed unit and‘into the reel, space of theroeel‘unit;
for indenting the surface’ thereof with gripping jaws and,
FIG. 2 is a longitudinal sectional View in a horizontal
40
consequently, avoiding any‘marrin'g of the drive rod sur
plane‘, looking downwardly;
,
j
,
face which would tend ‘to developdeterioration ‘and fail
ure in the drive rod.
FIG.'2a is a schematic‘ diagram of the transmission
‘
mechanism;
Broadly, the invention contemplates'such ‘an apparatus‘
including’; in general, 'a"reel‘for sto’ring‘rthe drive rod; and
a'f'eed“ unit, operating in immediateassociation with the‘
arrangement wherein the drive'rod, ‘as it1 is being retracted
into the reel,: is pulled radially‘ inwardly ‘so as to be tightly
wound
previously wound ‘coils ‘of rod in the‘ reel,
whlereasiduring projection of ‘the drive‘rod,:the forces act
ing'thereon by the differentially rotating reel and feed unit
tion of the same;v
4
_.
4—.4 of FIG. 3;
V
l
.
,
.
FIG. 5' is a fragmentary detail sectional view of the
storage area of the reel;
-
FIG. 6 is, a transverse‘sectio'nal view taken on the line
55
6-‘-6 of FIG. 1;
FIG. 7 is a transverse sectional view taken on "the linev
7--7Iof FIG. 1;‘
V
A
-
FIG. 8 is a side view of the feed unit;
FIGL' 9tis a'front end view of the'feed‘ unit;
FIG. 10 is a detail sectional 'view‘of the forward‘ end.
60 portionof'the feed unit, taken on the line 10L-10‘of
FIG. 8; and
r
*7.
FIG. 11 is a detail sectional view'taken on li'ne'11—-11
0f FIG; 9.
by avoidingtangling of ‘the successive turns ‘of the drive
I
General Description
65
A further object is to ‘provide, in such an‘ apparatus, a
feed ’unit of generally conical form,‘ including an axle
shaft, ‘and a ‘backring which isadjustably mo'urited‘on
said shaft for rotation in adjustable’proirimity‘to an open
side of the reel saddle, for‘ closing said open side and con; 70
?ningj'the‘ coils ‘of "drive rod‘ therein, said‘ back‘ ring being’
t _
FIG.v 4'is._a sectional view thereof taken on'the line
50
disengaged from the rod that is coiled upon the reel, there
,
a
FIG. 3 is a side view of the reel unit;
will cause it ‘to move radially outwardly so as ‘to’ become
rod within the reel.
>
FIG. 20 is a fragmentary radial sectional view of a‘ por
being'telfected by ditferentiallvrotating the‘reel ‘and feed
being retracted Whenthe feed unitlrotates behindfrthereel;
A further object'fis‘ to providexin such an app‘a‘ratn‘gan
.
tion ‘of the same;
into
reel, the‘
for reel,‘
feeding
projection‘an‘d‘
the rod out ofretraction
the reel'a'nd
of ‘the
retracting
rod‘ both
units; More speci?cally,‘the invention’ provides an ap
paratus wherein‘positive' projection and retraction of‘the
drive rod is imparted “to it by‘ the’ reel when rotating dif
fe‘rentially with respect to a feed unit, the driverod being
projected when‘ the‘ feed unit rotates ahead of the reel and
,
FIG.v 2b isa fragmentary axial sectional view of a por
7 Referring ‘now to‘the drawings in ‘detail, ‘I have shown‘
therein, as an example of one form in which the invention
may be embodied, a reel feed apparatus comprisingjin'
general, a wheeled chassis A; a'r'eel unit B andl'a feed unit
C, both rotatably'supported on a common axis; ainiotor,
D for ‘driving'iboth of the units B andC; reversible traps-‘Iv
mission mechanism E’ for‘ transmitting drive to thereel
3,071,794
4
3
and change speed transmission mechanism F, for trans
mitting variable-speed drive to the feed unit C.
Detailed Description
Chassis A.—The chassis A (FIGS. 1 and 2) comprises
36 and the hoop 48 being disposed relatively near the hub
39.
It will now be apparent for original assembly and
repair servicing purposes, the back spider and saddle
section of reel unit B can be detached from the conical
front brace rod section by opening the couplings 36 and
a horizontal bed frame 15 the rearward portion of which
is supported upon wheels 16 and the forward portion of
bodily separating the two sections of the reel unit from
which has a downwardly projecting pillar 17 supported,
Feed unit C.—The feed unit C (FIGS. 8-11) is
one another.
mounted on and driven by shaft 30. It comprises a
through a swivel joint 18, upon a pair of steerable wheels
19 having a draw bar 20 for towing the apparatus be 10 guard ring 50 of angle iron including a ?at radial ?ange
51 and a cylindrical forward ?ange 52; and a plurality of
hind a tractor vehicle. The chassis further includes re
radial spokes 53, the outer ends of which are secured, as
spective forward, intermediate and rear A-frames 21, 21'
by welding, to the rear face of radial ?ange 51 and the
and 22 respectively, having at their upper ends, respective
inner ends of which are suitably secured to a hub 54
sleeve bearings 23, 23' and 24. In the forward end of
the chassis A is a seat 25 for the variable speed trans 15 mounted on and secured to shaft 30. The guard ring 50
is braced by a plurality of sectional rod braces 55 each
mission forming part of drive unit F. The seat 25 and
including a forward section 56 having a forward end
the A-frames are erected upon a bed plate 26 which is
secured, as by welding, to the periphery of a forward hub
attached to the upper sides of the respective laterally
collar 57; each including a rear section 58 secured, as by
spaced beams of the bed frame 15, bridging between
these beams and bracing the bed frame structure. Refer 20 welding, to the radial ?ange 52 of guard ring 50; and
each brace further including a turn buckle 59 coupling
ring to FIG. 2, the frame bed 15 includes a relatively
the sections 56 and 58 thereof for length adjustment.
narrow rectangular forward portion 15’, coextensive in
Forward hub collar 57 is secured to shaft 30. The turn
area with the bed plate 26, and covered thereby, and an
buckles 59 are operable for (a) truing the guard ring 50
open rear portion ‘15” of ?sh-tail form, of su?icient span
to receive the lower portion of reel unit B which projects 25 so that its radial ?ange 51 accurately lies in a plane
normal to the operational axis, and (b) bodily adjusting
downwardly therethrough as indicated in FIG. 1.
the guard ring 50 toward and away from the forward
Reel unit B.--Reel unit B (FIGS. 3-5) comprises a
edges of saddle bars 41 and ?ngers 44.
reel shaft 30 having an open forward end portion jour
The guard ring 50 and spokes 53 cooperatively de?ne a
nalled in bearing 23, an intermediate portion journalled
back spider the periphery of which is disposed immedi
in bearing 23' and a rear end portion journalled in bear
ately forwardly of the saddle bars 41 and ?ngers 44, in
ing 24. The shaft 36 is tubular to receive and guide the
blocking relation to the gaps 46 in the forward side of
drive rod for projection from its forward end, which is
the saddle, the spacing between the outer extremities of
open. Reel unit B further includes a conical reel cage
spokes 53 and the forward edges of saddle bars 41 and
fabricated largely of metal rod parts consisting in sepa
rable forward and rear sections.
The rear section com
prises a plurality of radial spokes 31 attached, as by
welding, to a rear hub 32, respective periphery bars 33
integral with and bent forwardly from respective spokes
31, parallel to the operational axis (of shaft 30) and
terminating in respective forwardly and inwardly inclined
tangs 34. Brace rods 35, aligned with tangs 34, are cou
35 ?ngers 44 being su?icient for free, non-interfering rela
tive rotation of the units B, C, but narrower than the
thickness of drive rod 42 so as to prevent any turn of
the drive rod entering the spaces between this back
spider and the forward extremities of the saddle.
Secured as by welding to the periphery of the guard
ring ?ange 52, (FIG. 5) and extending diagonally across
a substantial portion of the axial width thereof, is a
guide sleeve 60 through which the emerging portion 42’
36. The forward end of each brace rod 35 is bent for
of drive rod 42 extends for free sliding movement. In
wardly, at 37, parallel to the operational axis and is se
cured, as by welding, to the inner wall of a cylindrical 45 the ?ange 51, substantially aligned with the sleeve 60, is
an aperture 61 (FIG. 1a) disposed at the same radius
skirt 38 of a forward hub 39. Hubs 32 and 39 are
(from the operational axis) as gap 46, the aperture 61
mounted for free rotation upon shaft 30 and are axially
being sufficiently restricted radially to guide the drive
positioned between bearings 23’, 24. Hub 39 has a
pled to them by respective threaded separable couplings
radial ?ange portion projecting past the forward end of
skirt 38 and terminating in teeth constituting a sprocket
40 through which the reel is driven.
Referring now to FIG. 5, a plurality of saddle bars 41
are secured, as by welding, to the forward sides of the
rod portion 42' through the gap 46 during projection
and retraction of the guide rod. As indicated in FIG.
11, the direction of passage of the guide rod through the
?ange 51 and into the reel saddle 47 is inclined at a small
angle to the plane of the ?ange 51, and as indicated in
respective spokes 31 and project diagonally forwardly
FIG. 1a, and in FIG. 9, the radial position of aperture
and outwardly. Wound upon the saddle bars 41 is a
drive rod 42. From its inward turns toward and- un
reeling turn 42' which leaves the reel B to enter feed unit
C, the drive rod 42 encircles the reel B in a clockwise
direction when looking from the tool end toward the
reel B as in FIG. 9. Secured to the inward sides of
to guide the rod section 42' through the gap, positioning
it away from the paths of rotation of the saddle bar tips
43 and the tips of ?ngers 44.
Feed unit C further includes a series of pairs of guide
periphery rods 33 and projecting radially inwardly op
posite the forward tips 43 of saddle bars 41 are a plu
rality of triangular guide ?ngers 44 each of which has a
forwardly and inwardly inclined rear margin 45. Margins
45 function as camming surfaces to guide an unreeling
turn 42’ of the drive rod 42 through a pass 46 which is
de?ned between the inward tips of ?ngers 44 and the tips
43 of saddle bars 41. Thus the drive rod may emerge
from an annular reel saddle 47 which is de?ned by the
61 corresponds to the radial positions of gaps 46 so as
pulleys 65 mounted in clevises 66 which are secured to
the ends of stems 67, 67', 67", 67f, anchored in an
projecting radially from the shaft 30, the stems 67, 67'
etc., being of successively shorter length from the rear
end toward the front end of the feed unit C, and being
successively displaced angularly about the shaft through
a substantial portion of the circumference (e.g. 90°)
along an involute spiral path from the bearing sleeve 60
circumferentially and inwardly, the path gradually curv
ing away from a generally circumferential beginning of
outer extremities of spokes 31, the saddle bars 41, the 70 the path at the bearing sleeve 60 to a direction approxi
mately parallel to the operational axis at the end of the
periphery bars 33 and the ?ngers 44, upon which the suc
path. There the emerging section 42' of the drive rod
cessive turns of a cleaning tool drive rod 42 are reeled.
enters the shaft 30 through a passage 68 (FIG. 2) in the
Brace rods 35 are secured in diverging conical assembly
tubular wall of the shaft 30, and is curved into alignment
by circumferential hoops 48 and 49 welded thereto, the
hoop 49 being disposed adjacent the separable couplings 75 with the operational axis within shaft 30 as shown in
‘3,071,794
FIG. 2. A guide shoe ‘69 in the form of a plug secured
‘within shaft 30 and having a wedge shaped end de?ning a
ramp surface 70 substantially aligned with the rear side of
‘aperture 68, may be utilized to guide the drive rod por~
tion 42' into its axial path within shaft 30. ‘From this
part, ‘the drive rod passes forwardly through the open
end of shaft 30 and projects therefrom at 42" for entry
6
ing radially inwardly ‘from diametrically ‘opposite ‘portions
of the sprocket hub 90, and a ‘pair‘of-control‘or clutching
balls 92 disposed in respective radial bores 93 in‘the shaft
77 in the plane of the balls 88 and adapted ‘to‘be forced
outwardly between adjacent pairs of balls 588 ‘by axial
movement of an actuator head 94 on an actuator stem
95 which extends ‘to the exterior of the housing of trans
into a sewer, culvert or the like. Secured to the for
mission 84 and is provided with a suitable actuator mech
ward end of projecting portion 42" may be any sewer
anism 96 for sliding the same axially ‘in the‘shaft ‘77.
cleaning tool such as that'illustrated at 71 in FIG. 2.
10 The actuator handle means 96 may as shown in FIG._1
Drive rod 42 is of a fairly hard, elastic material such,
as spring steel, sufficiently spring-like, and elastic to yield
to the curvatures imposed thereon as it is wound‘in the
reel saddle 47, deflected forwardly through the aperture
61, curved in the involute path between the series of 15
guide rollers 65, and curved into alignment with the
be of a pinion and rack type as shown, or any suitable
equivalent mechanism. When the head v94 is disposed
between a pair of balls 92, the latterrwill, be‘ projected
radially outwardly into ‘positive engagement between
spaced adjacent balls 88, thereby establishing a positive
drive connection between the shaft 77_ and ‘the teeth ‘91
operational axis as it passes into shaft 3ft through aper
of a respective sprocket 87. All sprockets , not thus
ture 68. Its rigidity is such that it will normally assume
clutched to the shaft 77 will be in free rotatable relation
a straight condition where it is not subjected to ?exing
thereto, the balls 88 travelling circumferentially around
strains, and will maintain suf?cient rigidity so that it 20 the shaft and over and across the bores 93 without estab
can be fed forwardly under end pressure imparted to it
lishing any driving relationship. Sprockets 97 are secured
by the reel feed apparatus, for travel in a sewer to the
on output shaft 85 in alignment with respective sprockets
extent of a city block or more, without developing kinks
87. In the array of sprockets 87, the diameters decrease
or permanent bends therein.
slightly in one direction along the common axis thereof
Drive motor D.--Drive motor D may be any conven 25 and in the array of sprockets 97 the diameters decrease
tional motor of suitable horsepower. For example, it
slightly in the opposite direction along the common axis
may be a small gasoline engine. From its drive take
of those sprockets. Thus, as the actuator stem 95 is
off shaft and a heavy duty clutch 74, engine D drives
drawn successively in one direction from a point where
selectively through a pair of belt drives 75 and 76 (see
its head 94 establishes drive through one of the end
FIG. 2a as well as FIGS. 1, 6 and 7) to (a) a shaft 77 so sprockets, to the drive position for the sprockets at the
constituting ‘the input shaft of variable speed transmis
opposite end, there will be a constant slight stepup or
sion F, or (b) the input shaft 78 of reversible transmission
stepdown as the case may be, in the ratio of drive through
E. Motor D and clutch 74 are shown in phantom in
the unit F. The change in’ ratio is relatively slight be
FIG. 1 to reveal the transmission E and associated parts.
tween each succeeding pair of drive positions, to provide
Reversible transmission mechanism E comprises a con
a suitable range of drive ratios for normal cleaning oper
ventional reversible gear shift transmission 79 which may
ations wherein the tool ‘driving rod 42 is slowly fed for
be a standard‘ automobile transmission 1( 3 speeds forward,
wardly while being rotated;
The speed of rotation is
one reverse, and a neutral or non driving'position) con
governed by. the selection of gear ratio in the transmis
trolled by a shift lever and having an output shaft 80
sion F. The speed of forward feed is determined by the
in constant driving relation to intermediate shaft 77 40 differential between the speed of rotation of reel B (gov
through a chain drive 81. Transmission mechanism E ‘is
erned by the speed ratio provided in belt drive unit 76
made ‘operative by establishing drive from motor D
through belt drive 76 while disconnecting the drive
when the latter is operating) and the speed of rotation of
through belt drive 75.
lection of a ratio in transmission F);
For this purpose there is pro
vided a conventional double belt tightener unit 82 having 45
respective tightener rollers operable to selectively tighten
the belts of drive units 75, 76, releasing one of the drives
while tightening the other.
-
From {the shaft 77, when being ‘driven, drive is always
feed unit C (which will vary in accordance with the se
_
Some of the low speed ratios of the transmission unit
F are such as to transmit drive to the feed unit C at
rates slower than the rate of rotation of reel unit B,
whereby the unit B will rotate ahead of the feed unit C
(in the anticlockwise direction 105 of FIG. 9) resulting
transmitted to the reel B through a chain drive 83 regard 50 in the‘ drive rod being retracted while it is being rotated
less of whether shaft 77 is being driven directly from
in the direction 105 by the feed unit. Preferably, there
motor D through belt drive 75 or through the longer cir
are three forward feed ratios ‘and three rearward feed
cuit including belt drive 76 and the reversible transmis
(retracting) ratios in transmission F.
_
sion mechanism E. When drive is being transmitted
A 1:1 (synchronized) ‘drive of reel B and feed unit C
through the transmission E, the transmission F is placed 55 is attained by shifting transmission F into a neutral, non
in a neutral position where it will not transmit drive.
driving position (e.g-.rb_etween the two sprockets 87 at the
When drive is being transmitted through belt drive 75,
center of the cluster of sprockets on shaft 77) and driv
with‘th‘e transmission F shifted to an operative position,
ing only the reel B, which will transmit drive through the
the drive will‘ proceed from one end of shaft 77 to the
drive rod 42 to the ‘feed unit C at the 1:1 ratio. This
reel B through chain drive 83 and from the other end of
effect apparent results from the fact that the resistance of
shaft 77 through the transmission F to the feed unit C
the drive rod to being projected or retracted ‘is greater
as will now be described in detail.
than the torque requiredv to be transmitted through the
Feed unit drive transmission F.—The variable drive
drive rod for effecting its rotation.
mechanism F in cludes a change speed transmission 84
In the ensuing description, when reference is made to
having 1a selection ‘of a fairly large number of gear ratios, 65 the directions of rotation of reel B and feed unit C, such
having the shaft 77 as its input shaft, having an output
directions are speci?ed as clockwise and counterclockwise
shaft 85 in spaced parallel relation to the shaft 77, and
respectively, as seen when looking rearwardly from the
driving ‘from the output shaft 85 to the shaft 30 of the
tool end, as in FIG. 9.
feed unit C through a chain drive 86. The transmission
A positive brake device indicated schematically at 98
unit ‘84 also includes a series of drive sprockets 87' rotat 70 in FIG. 2a is utilized for holding the feed unit ‘C against
ably mounted upon the shaft 77 ‘(which is tubular as
rotation while the reel B is rotated counterclockwise (to
shown in FIG. 2b) and a‘series of ball clutches compris
retract the drive rod'42) vor clockwise (to ‘feed the drive
inglballs 88 mounted in annular race ways 89 in the re
rod forwardly). The brake unit 98 may comprise ‘simply
spective sprocket hubs, arranged in pairs on respective
a locking bolt or dog 98’ (FIG. 2) slidablyr mounted in
sides‘of a pair of ‘driving teeth '91 integral with and project 75 a guide sleeve or the like 99 on the top'rof A-frarne 21;
3,071,794
8
7
unit, it will engage the camming margins 45 of ?ngers 44
Such feeds are rapid feeds, utilized when the drive rod
and will thereby be guided radially inwardly toward the
is being moved into or out of a sewer with little or no
resistance to such movement.
aperture 61. This portion of the coil at 42a in PEG. la
is shown in phantom to indicate that it is a portion of the
coil located at a position circumferentially removed from
For arresting rotation of reel B (in the event an ob
struction is encountered in a sewer being cleaned, or upon
the cross sectional plane of FIGv 1a at aperture 61.
a shut down) there is preferably provided a friction brake
unit comprising a brake band 100 engageable with the
cylindrical skirt 38 of reel unit B, functioning as a brake
drum, one end of the brake band 1% being secured by an
anchor pin 101 (FIG. 1) carried by a suitable bracket on
At this point it may be noted that speed of rotation of
the drive rod is directly determined by speed of rotation
of the feed unit C, which in turn is varied in accordance
with the selection of a drive ratio in transmission unit F.
Also, since the reel unit 3 is driven at a constant rate so
the top of A frame 21’, and the other end of brake band
long as the drive is transmitted through belt '75, the dif
100 being operable by an eccentric 102 on the end of a
ferential between the rotational rates of units B and C
crank shaft 103 having a crank lever 104 for rotating the
(i.e., the rate of recessional movement of reel unit B with
same in suitable bearings in A-frames 21 and 21’, where
by the eccentric 102 will tighten the band 160. Since 15 respect to feed unit C) varies directly with the speed of
rotation of feed unit C. Thus, the rate of forward feed
the feed reel C, whenever it is rotating, is geared to the
will be increased and decreased directly in step with the
reel B, this braking action will likewise arrest rotation of
rate of rotation of the drive rod, thus attaining maximum
the unit C.
Operation
et?ciency of cleaning operation under varying conditions
stoppage within a sewer.
In the normal operation of the apparatus, drive from 20 of When
transmission F is shifted to a neutral position,
motor unit D is utilized to rotate both the reel B and the
reel B will drive the feed unit C at the same rate of rota
feed unit C in a common direction which is indicated by
the arrow 91 in FIG. 1. As viewed from the forward end
tion as the reel B.
rection of rotation is counterclockwise as indicated by ar
row 105 in FIG. 9. This direction is opposite to the di
rection (arrow 106) of inward spiralling movement of
the emerging portion 42' of the drive rod in its path from
With the reel and feed units being
driven at the same speed, the drive rod 42 will be ro
of the apparatus looking rearwardly (as in FIG. 9) the di
25
tated without longitudinal feeding movement.
‘When it is desired to project or retract the drive rod
42 without rotating it, the belt tightener unit 82 is shifted
to release the drive 75 and establish drive through belt 76
to gear shift unit E. Transmission unit F is shifted to a
the reel saddle to the point where it enters shaft 39.
The direction of rotation of the drive rod for driving 30 neutral position to break the drive from shaft '77 to feed
unit shaft 3@. Brake unit 98 is actuated to lock the shaft
the tool, hereinafter referred to as “working rotation,” ap
30 and the feed unit C against rotation. Gear shift unit
pears to be counterclockwise as viewed in FIG. 9, look
B may then be actuated to drive the reel unit B in the
ing rearwardly and is clockwise or “right-handed” as seen
clockwise direction m7 of FIG. 9. This is opposite to
by the operator looking from the rear toward the front
35 the direction of working rotation of the drive rod but,
end of the machine where the drive rod emerges.
since it effects the projection of the drive rod in the for
When it is desired to simultaneously rotate and feed
ward feed direction, it may be regarded as the forward
the projecting portion 4 " of the drive rod forwardly
feed direction of the reel unit in this operation, and the
into a sewer, or the like, the machine is operated to rotate
gear shift unit E is arranged so that its several forward
the feed unit C ahead of (faster than) the reel unit B
in the direction 105. Thus the reel unit B will lag behind 4.0 feeds may be utilized for projecting the drive rod at va
rious selected forward speeds. When it is desired to re
unit C with a net relative movement in the direction 107,
tract the drive rod without rotating it, the gear shift unit
feeding the drive rod in that direction through unit C as
E is shifted into reverse position, effecting rotation of the
indicated at 106. For normal cleaning operations this is
reel unit in the anti-clockwise direction 105' of FIG. 9,
accomplished by shifting the belt tightener S2 to the posi
tion establishing drive through belts 75, and shifting the 45 thus reeling in the drive rod 42 in the saddle portion of
the reel and correspondingly withdrawing it through
variable speed transmission unit F into a selected driving
shaft 30 and guide sleeve 60 into the reel saddle.
position. In several driving positions, the unit‘ F will
Retraction of the drive rod combined with working
transmit drive to the feed unit C at a rate faster than drive
rotation thereof is attained, at selected speeds, by shift
is transmitted to the reel B, the differential between rates
being determined by the drive position selected in the 50 ing transmission F into a selected one of its lower (re
versing) ratios in which feed unit C is driven more
unit F.
slowly than reel unit B, the latter thus rotating ahead
As the result, the reel unit B will have a slow net re
of unit C in the counterclockwise direction 165 of FIG. 9,
cessional rotation with reference to feed unit C, in a clock
and consequently operating to retract and reel the driving
wise direction as indicated by arrow ‘107 in FIG. 9, which
will be transmitted to emerging section 42' of the drive 55 rod into its saddle.
During such reeling of the drive rod into the saddle,
rod as a forward feeding movement whereby the drive
the emerging portion 42' and the last preceding turn of
rod will be projected forwardly from the apparatus at
the drive rod will be placed under tension and accordingly
42". This forward feeding movement is indicated by
the drive rod will be drawn snugly inwardly against the
the arrow 94 in FIG. 1. Thus the tool 71 will be ad
vanced into the sewer and simultaneously rotated in the 60 previous coils of the rod in the reel saddle, as rapidly
as it is drawn through the gaps 46. Also, the inward,
working direction 105 for cleaning the sewer.
rearward inclination of the saddle bars 41, cooperating
During such recessional movement of the reel unit with
with the inwardly retracting portion of the drive rod
respect to the feed unit, as indicated by arrow 167, the
under tension, will cause the latter to slide rearwardly
movement imparted to the drive rod from the reel saddie
will cause the outer turn thereof (immediately preceding 65 and inwardly down the inclines provided by the outer
margins of the saddle bars 41 so as to be coiled in the
rear portion of the reel space 47 as indicated in FIG. 5.
To sum up the foregoing, it will be apparent that the
ing this last turn of the drive rod from the turns of the
apparatus can be operated with a continuous rotation of
drive rod that are wound upon ‘the saddle bars 41 and
thereby avoiding any tangling of the outer turns of the 70 the tool 71 in a sewer and with selective projecting feed
or retracting feed or stopping of the tool for rotation in
drive rod. This is a major advantage of the apparatus.
a ?xed position, without at any point interrupting the
The outer coil of the drive rod as thus expanded against
rotation of the tool. One of the advantages of the ap
the periphery of the reel saddle is indicated at 42a in
paratus is the fact that it is advantageous to maintain
FIG. 1a. As it approaches the point where it emerges
the same direction of rotation of the tool during both
through the aperture 61 in the guard ring 50 of the feed
the emerging portion '42’) to be forced radially outwardly
against the periphery rods 33 of the reel saddle, thus free
3,011,794
advancing. and retracting movements. The reversing unit
E provides for‘ selective operation.
Iiclaim:
1. In. a sewer tool‘: drive rod‘ feeding and rotating ap
paratus: a frame; a reel unit and‘ a feed unit mounted
in said frame for independent rotation on a common
means for guiding said‘ drive rod from the periphery of
said reels saddle past the periphery of- said back portion,
thence inwardly to said, shaft at a point near the forward
end- of said feedt unit, said shaft having at said point an
aperture through which the drive rod enters the shaft,
passes forwardly therethrough, and projects from the for
axis; said reel unit including a reel saddle on which coils
ward end thereof to carry a sewer cleaning tool; and means
of said drive rod may be wound; saidt feed unit including
for’ independently driving said. reel unit and feed unit in
a back portion disposed forwardly of and adjacent to
a common rotational direction and for varying the’ rota—
said, reel saddle and including means for guiding‘ said
tional‘ speed ofone of said units with respect to the other,
drive. rod from the periphery of said reel saddle past the
whereby to selectively project said drive rod at‘ different
periphery of said back portion, thence inwardly to a point
feed rates while rotating the rod.
adjacent the common: axis of rotation of said reel and
7.v Apparatus as de?ned in claim 6, wherein said guid
feed units, and thence axially forwardly from; the for~
ing means comprises a plurality of stems secured to and
ward ends; of" said reel and feed units; and means for 15 projecting radially from said tubular shaft in circumfer
independently driving said reel unit and feed unit differ
entially andaxially spaced positions, and respective‘ guide
entially in a common rotational direction, whereby to
eyes carried by the outer ends of said stems and de?ning
project said drive rodrwhile‘. rotating it in a single direc
anjinvolute spiral path for said guide rod.
tion ofrotation.
8. In a sewer tool drive rod feeding and rotating ap
2': In a sewer tool drive rod feeding and rotating‘ ap
paratus: a- frame; a reel unit and a feed unit mounted
in said, frame for independent rotation on a, common
axis; said reel unit including a reel saddle on which coils
of said drive rod may be wound; said feed unit including
a back portioddisposed forwardly of and adjacent to
said‘ reel saddle and including means for guiding said
‘drive rod from the periphery of said reel saddle past the
periphery of said back portion, thence inwardly to a
pointadjacentthe common axis of, rotation of said'reel
20 paratus: a‘ frame; a tubular shaft rotatably mounted in
said‘ frame and having an open forward end‘; a reel unit
including a reel saddle on which coils of said drive rod
may be wound, mounted on said shaft for rotation therea
on; a‘; feed,v unit‘ mounted on and ?xed tosaid shaft to
25 receive rotation therefrom; said feed‘ unit including a
back portion disposed forwardly of and adjacent to said
reelfsaddle and including means for guiding said drive rod
from the periphery of said reel-saddle past the periphery
of‘ said back portion and thence inwardly and forwardly
and feed units, and thence axially forwardly from the 30 to a pointiadjacent to saidshaft at a point near the for
forwardendsof said reel and feed units; and means, for
wardtend of said feedunit, said shaft having at said point
independently driving said reel unit and feet unit diifer
an aperture through which the drive rod enters the shaft,
entially ina commonrotational direction and for varying
passes forwardly therethrough, and projects from the
the rotational speed ofv one of said units with respect to
‘forward end thereof to carry a sewer cleaning tool; means
the other, whereby to selectively project said drive rod 35 for rotating said reel unit upon said shaft; and means» for
at different feed rates while rotating it in a single direction
driving saidshaft so as to drive said feed unit independ
of‘rotation.
entlyt of but in a common rotational direction with said
3. Apparatus as de?ned in claim‘ 2; wherein the, means
reel unit and for varying the rotational speedof said feed
forg-driving the feed‘tunit includes clutch means which
unit with respect to said reel unit, whereby to selectively
canbe declutched to permit the driving of the reel ‘unit 40 project said drive rod at different reed rates while ro
without-driving the feed unit; and further including means
tating the- rod.
I
to hold the feed unit stationary while the reel-unit is
9. Apparatus as de?ned in claim 8, wherein said reel
driven to move the drive rod-longitudinally without ro
driving means is coupled directly to said reel unit and
tatingitt
'
whereinssaid‘ feed unit drive means includes amultiple
4._ Apparatus as de?ned in claim 3, including means 45 ratio, change-speed’transmission driving said shaft; said
for, transmitting reverse drive to the reel unit while the
apparatus furtherrincluding, acornmon source of power
feed unit is declutchedand held stationary, whereby to
driving both said transmission and saidv reel driving
retract the drive rod without rotating it.
means“
5. In; asewer tool driveprod feeding and ‘rotating ap_
10.‘ In a sewer. tool drive rod feeding and rotatingap
paratus: a frame; a reel unit and a feed unit mounted in’
paratus: a supporting frameya tubular shaft mounted
said frame for independent rotation on a common axis;
said reel unit including a reel saddle on which coils of
said drive rod may be wound; said feed unit including a
back portion disposed forwardly of and adjacent to said
reelsaddle and including, means for guidingsaid drive,
rodfromthe periphery of said reel saddle past‘ the periph-j
eryof said back portion, thence inwardly to a point adja-.
cent the common axis of rotation to, said reel and feed
units, and thence axially forwardly from the forward‘
therein‘ for rotation on a substantially horizontal axis;
a feed unit mounted on andsecured to said shaft; a
reel unit mountedon said shaft for rotation independently
of said ufeed unit; said reel and feed units being of
generally conical form, said reel ‘unit having a rear por
tion-.of- maximum diameter constituting a reel saddle
in which said driverod may be coiled and having afor
wardqend tportionyof minimum diameter provided with
andrive receiving element, said feed‘ unit-being disposed
ends of ‘said reel and feed units; and means for ,independ-i 60 within said reel unit and provided with means for guid
entlytdrivingsaid reel unit and feed unit differentially in;
ing the drive rod from the reel saddle in a feed path ex
a common rotational direction and for varying the rota
tendinginwardly and forwardly to said shaft at a point
tional speed of one of said units with respect to the other
adjacent to and rearwardly of thevforward- end ofasm'd
from a speed of said one unit faster than said other‘ unit
vfeed unit, saidqshaft having at said point an aperture
to a speed of said one unit slower than said other unit,‘ 65 through-Which‘ the drive rod enters ‘the shaft andpasses
whereby to selectively project or retract said drive rod.v ,
6.;yIn atsewer tool drive rod ‘feeding and rotating ap
parat-us; a supporting frame; a~tubular shaft mounted
forwardlytherethrough and :projects from thetforward
end/thereof to carry a sewer cleaning tool; a motor; means
providing a drive from said motor, to said drive receiving
therein for rotation on a substantially horizontal axis and
part on the forward‘ end ofsaid. reelfor rotating the
having anopen foifwardendg a feed unit secured. on said 70 reel; and means for transmitting drive from said motor
shaft; a reel unitmounted on said shaft for rotation inde
to said shaft forwardly of- said reel and drive units for
pendently of said feed nnit;..said reel unitrincluding a reel
drivingjsaid feediunit differentially with reference to said
saddle on which coils of said drive rod may betwound;
reeliuni't ina common direction .of rotation, for moving
said vfeedrunit including a back portion disposed, for
said ,drive rod longitudinally Whilerotating it“
Wardly v‘of and adjacent to" said reel saddle andaiincluding 75 11; Apparatus, ‘as , de?ned .in claim :10, whereinsaid
3,071,794
11
12
drive rod guiding means comprises a plurality of stems
ferentially with respect to said reel unit in a common
of successively shorter length secured to and projecting
generally radially from said shaft in positions succes
sively spaced forwardly from said reel saddle, and pairs
of opposed guide rollers carried by the respective stems
transmission, for selectively projecting or retracting said
at their outer ends, between which said drive rod is
guided.
12. In a sewer tool drive rod feeding and rotating appa
ratus: a supporting frame; a tubular shaft mounted there
in for rotation on a substantially horizontal axis; a feed
unit mounted on and secured to said shaft; a reel unit
mounted on said shaft for rotation independently of said
direction of rotation, for projecting said drive rod while
rotating it; and means for holding said feed unit station
ary while rotating said reel unit through said reversible
drive rod without rotating ‘it.
16. In a sewer tool drive rod feeding and rotating appa
ratus: a frame; a reel unit and a feed unit mounted in
said frame for rotation on a common axis; said reel unit
including a back spider comprising a hub and a plurality
of spokes radiating therefrom, a reel saddle comprising a
plurality of circumferentially spaced saddle bars secured
to respective spokes and projecting forwardly therefrom,
feed unit; said reel and ‘feed units being of generally coni
on which coils of said drive rod may be wound, said reel
cal form, and said reel unit having a rear portion of
maximum diameter constituting a reel saddle in which 15 saddle further including a plurality of periphery bars
projecting forwardly from the outer ends of said spokes
said drive rod may be coiled and having a forward end
and spaced radially outwardly from said saddle bars, said
portion of minimum diameter provided with a drive re
reel saddle having a plurality of open passes between the
ceiving element, said feed unit being disposed within said
forward ends of said saddle bars and said periphery bars
reel unit, having a back portion including, at the periph
ery thereof, a guard ring disposed immediately forwardly 20 for emergence of the drive rod from the reel, said feed
unit including a back portion disposed forwardly of and
of said saddle and provided with means for guiding the
adjacent to said reel ‘saddle, including means for guiding
drive rod therethrough from the reel saddle and thence
said drive rod from said reel saddle past the periphery of
in a ‘feed path spiralling inwardly and forwardly from
said back portion, thence inwardly and forwardly to a
the guard ring to said shaft at a point just rearwardly of
the forward end of said feed unit, said shaft having at 25 position adjacent the common axis of rotation of said
reel and feed units, and thence axially forwardly from
said point an aperture through which the guide rod enters
the ‘forward ends of said reel and feed units; and means
the shaft and passes forwardly therethrough and projects
for differentially rotating said reel unit and feed unit in
from the forward end thereof to carry a sewer cleaning
a common direction, whereby to move said drive rod
tool; a motor; drive means providing a drive from said
motor to said drive receiving part on the forward end of 30 longitudinally while rotating it.
17. In a sewer tool drive rod feeding and rotating appa
said reel for rotating the reel; and drive means for trans
ratus: a frame; a reel unit and a feed unit mounted in
mitting drive from said motor to said shaft forwardly of
said frame ‘for rotation on a common axis; said reel unit
said reel and drive units, differentially with reference to
including a back spider having a hub, a reel saddle com
said reel unit in a common direction of rotation for pro
35 prising a plurality of circumferentially spaced saddle bars
jecting said drive rod while rotating it.
secured at their rear ends to said spider and projecting
13. Apparatus as de?ned in claim 12, wherein said
forwardly therefrom, on which coils of said drive rod
guard ring includes a radial ?ange element having a guide
may be wound, and said reel saddle including periphery
aperture through which said drive rod passes from the
means projecting forwardly from the periphery of said
reel saddle into said path.
40 spider and spaced radially outwardly from said saddle
14. Apparatus as de?ned in claim 13, wherein said
bars, said reel saddle having a plurality of open passes
guard ring is of L-section, including a cylindrical ?ange
between the forward ends of said saddle bars and said
extending forwardly from the inward margin of said
periphery
‘means for emergence of the drive rod from
radial ?ange element, said apparatus further including a
the reel; and said feed unit including a back portion dis
guide sleeve secured to the outer face of said cylindrical
posed forwardly of and adjacent to said reel saddle, in
?ange, substantially aligned with said aperture, and ex
tending diagonally circumferentially and axially there
from to guide the drive rod into said feed path.
15. In a sewer tool drive rod feeding and rotating appa
ratus: a vframe; a tubular shaft rotatably mounted in said
frame and having an open forward end; a reel unit in
cluding a reel saddle on which coils of said drive rod
may be wound, mounted on said ‘shaft for rotation there
on; a feed unit mounted on and ?xed to said shaft to re
ceive rotation therefrom, said reel unit having a rear
cluding means for guiding said drive rod from said reel
saddle past the periphery of said back portion and thence
inwardly and forwardly to a position adjacent the com
mon axis of rotation of said reel and feed units, and
thence axially forwardly from the forward ends of'said
reel and feed units; and means for differentially rotating
said reel unit and feed unit in a common rotational direc
tion, whereby to feed said drive rod while rotating it.
18. Apparatus as de?ned in claim 17, wherein said
saddle bars are secured to said spider at their rear ends
portion constituting a reel saddle in which said drive rod 55 and
are inclined forwardly and outwardly to their for~
may be coiled and having a forward end portion of mini
wards ends which are free so as to cooperate in provid
mum diameter provided with a drive receiving element,
ing said passes, whereby said drive rod, when being reeled
said ‘feed unit being disposed within said reel unit, having
in, will slide rearwardly and inwardly on said saddle
a back portion including, at the periphery thereof, a guard
ring disposed immediately forwardly of said reel saddle 60 bars in response to tension developed in said rod by the
reeling action, whereby to initially coil said rod in the
and provided with means for guiding the drive rod from
rear area of the saddle.
the reel saddle and in a ‘feed path spiralling conically in
19. Apparatus as de?ned in claim 17, wherein said
wai'dly and forwardly from the guard ring to said shaft
reel
saddle includes camming ?ngers secured to and pro
at a point near the forward end of said feed unit, said
jecting radially inwardly from said periphery means and
shaft having at said point an aperture through which
having respective inwardly and forwardly inclined rear
the drive rod enters the shaft, passes forwardlyv there
margins for guiding an outer turn of the drive rod in
through, and projects from the forward end thereof to
wardly from the periphery of the reel saddle through said
carry a sewer cleaning tool; a motor; an intermediate
passes and into said feed unit.
shaft; means providing independent alternately selective
References Cited in the ?le of this patent
drives from said motor to said intermediate shaft; a re 70
versible transmission in one of said drives; means driving
UNITED STATES PATENTS
from said intermediate shaft to said drive receiving part
2,267,493
Clotz _______________ __ Dec. 23, 1941
on the forward end of said reel for rotating the reel;
2,926,372
O’Brien ______________ __ Mar. 1, 1960
means including a speed ratio varying transmission for
Hunt ________________ __ Oct. 11, 1960
driving from said intermediate shaft to said feed unit dif 75 2,955,307
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