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Патент USA US3080953

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March 12, 1963
Filed June 7, 1960
March 12, 1963
3 Sheets-Sheet 2
Filed June 7, 1960
2056871/ {000/946
FIG. 2
March 12, 1963 ‘
Filed June 7, 1960
5 Sheets-Sheet 5
F lG-
zaaizn/g 60mm
I gym/1M”
United States Patent 0 ’ ice
Patented Mar. 12, 1963
FIG. 3 is a schematic drawing of the hose take-up
mechanism according to the invention.
Referring now to the accompanying drawings, the truck
Robert J. Goodall, Albion, Mich., assignor to The Ray
9 has a base 11 with a mast mounted on the front end
thereof. The mast comprises an outer upright structure
which inludes a pair of spaced uprights 32, 32 and an
inner upright structure which includes a pair of spaced
mond Corporation, Greene, N.Y., a corporation of
New York
Filed June 7, 1960, Ser. No. 34,435
5 Claims. (Cl. 187-9)
uprights 13, 13 movably mounted within the outer up
rights. A load carriage has a rectangular frame 15, FIG.
This invention relates to a lift truck, and particularly
to improvements in a take-up mechanism for taking up 10 I, mounted for movement along the inner uprights of
the mast. The carriage may include, e.g., a reach mecha?
slack in a flexible element extending from the truck to
nism (not shown) mounted on the frame 15 and carry
the load carriage.
ing load forks. The reach mechanism may be operated
' The present invention is primarily concerned with con
by one or more double acting piston and cylinder units
trolling the slack in hydraulic hoses which extend from
a lift truck to a hydraulic cylinder on the carriage of 15 in a manner similar to that disclosed in the Gibson
2,752,058 patent. It is unimportant to the present in
vention what type of carriage and associated apparatus
the truck and which become slack during elevation of
the carriage and extension of the truck mast. Hereto
fore, the common type of hose take-up mechanism has
included a weighted traveling sheave movable along the
outer upright structure of the truck under the in?uence 20
of gravity to take up the slack in one or more hoses.
, There have been some disadvantages in this type of
are provided so long as said apparatus include at least
one hydraulic motor. The take-up mechanism of the
present invention may be used in conjunction with any
?exible devices (e.g., hydraulic hoses, pneumatic hoses,
' ?uid carrying hoses, electrical cables, mechanical cables,
etc.) used to convey hydraulic, pneumatic, electrical, or
take-up mechanism in that the weight must be made of
considerable size to effect the desired movement of the
mechanical power, or ?uids to one or more power de
hose and,‘ secondly, ‘the traveling ‘ sheave has had a 25 vice-s mounted upon the load carriage or the telescoping
tendency to bind on its guides because of the deposit and ; mast of a lift truck, or to tools ‘or ?uid dispensing nozzles
manipulable remotely by the truck operator, or by an
operative stationed upon a platform mounted upon said
accumulation, of‘ dirt and foreign rn'atter‘on the guides
and sheave. ‘When this occurs, ‘the hose forms a loose
loop which may be caught between the moving parts
‘of the mast structure and severed or damaged,
load carriage or upon said telescoping mast.
The lift truck shown in FIGS. 1 and 2, including truck
‘ body 10, base 11, base arms 12, wheels 14, and steering
It is a main object of the present invention to provide
a lift truck having a hose take-up mechanism which is
operable independently of the in?uence of gravity to take
wheel 16, is shown merely schematically, and it is to
be understood that the hose take-up mechanism of the
instant invention is applicable broadly to all lift trucks
up slack in the hydraulic hoses connecting the truck to
35 and is not restricted in its utility to the type of truck,
the load carriage.
Q It is another object. of the present invention to provide
actuating mechanism, elevating mechanism, etc., shown in
the accompanying drawings.
such a mechanism which is compact and which does not
A hydraulic ram unit 1 is mounted between the ?xed
materially interfere with the vision of the operator of the
uprights 32, 32 by means of brackets 2, FIG. 1. The
It is a further object of the invention to provide such 40 unit is supplied with hydraulic ?uid under pressure’b‘y'
means of a supply member (not shown). The piston
a take-up mechanism which is operable to take up slack
rod 3 of unit 1 is connected at its upper end to a cross
in the carriage hoses of full free lift trucks.
brace 4 connecting the inner uprights 13. The inner
Another object is to provide on a lift~truck a take»up
uprights 13 and the cross-brace 4 will'hereinafter be re
mechanism operable to take up slack in any ?exible ele
45 ferred to collectively as the telescoping mast, while the
ment‘extending from the truck to the carriage.
The take-up mechanism of the present invention is
?xed uprights 32, 32 will hereinafter be referred to as
the main mast. The upper ends of inner uprights 13 are
. characterized in that part thereof is attached to the ?xed
joined by an additional upper cross-brace 5 whichis dis-.
uprights and part to the movable uprights and a pair
posed generally rearwardly of said inner uprights. The
that the slack in the hoses is aut‘omatically‘and positively 50 upper ends of the outer uprights 32, 32 are joined by
an additional upper cross-brace member 6 which is dis-_
taken up upon movement of the carriage and extension
of carriage hoses‘ are so trained about the mechanism
of the mast.
> posed generally rearwardly of the rear faces of said outer
uprights, i.e., with respect to the normal forward axis of
‘ Other objects of the invention will in part be obvious
the truck, as may be seen in FIGS. 1 and 2. The central
and will in part appear hereinafter. ‘
The invention accordingly comprises the features of
55 portions of the upper and lower cross members of car
riage 15 are disposed forwardly of the front faces of
construction, combination of elements, and arrangement
hereinafter set forth,’ and the scope of the invention will
Hydraulic rams 7, hereinafter
designated carriage drive cylinders, are mounted upon
be indicated in the claims.‘
the upper surface of cross-brace 4 with their axes dis
of parts, which will be exempli?edv in the construction -' - outer uprights 32,32.
For‘ a fuller understanding of the nature and objects 60 posed substantially parallel to the axis of drive unit._1,
of the invention reference should be had “to the following
detailed description taken in connection with the accom
panying‘drawings in which:
FIG.‘1 is a front view of a lift truck having a hose
take-up mechanism according toy-the present invention in
which the hydraulically'a'ctuated mechanism (e.g_., reach
hereinafter styled the main drive cylinder. The piston
\ rods 8 of the carriage drive cylinders have ?xedly dis
posed at their upper ends elbow members terminating
in outwardly disposed horizontal stu'b shafts, said hori
zontal stub shafts carrying bearings upon which sheaves
17 are freely rotatably, disposed. The ‘axes of sheaves
I 17 are, then, at all times maintained substantially e01
axial. Load carriage 15p'is connected to the outer ends
load carriage is omitted for purposes of illustration;
of chains 19 which are reeved over the sheaves 17. The
FIG. 2 is a side view of the truck in which the mast
and load-elevating structure are shown‘in an elevation 70 inner ends of chains 19 are connected at points 20 to
cross-brace ‘4, whereby when sheaves 17, are propelled
view taken along-line 2--2 of FIG. 1;
mechanism, revolving apron) normally mounted‘upon the
upwardly by carriage drive cylinders 7, carriage 15 is
the main mast. The other end of chain 30 is secured
to upper cross-brace 5 of the telescoping mast. Sprocket
simultaneously propelled upwardly substantially co-pla
narly within the inner uprights 13, being retained within
28 hangs in a generally vertically downwardly depend
ing relation in the bight of the loop formed by chain
inner uprights 13 by means of rollers 18. Carriage 15
may, of course, have mounted upon it any desired power
actuable means the ?exible lead-s to which may be pro
30. Link 27 will, in the preferred embodiment, be com
posed to two parallel substantially like parts disposed
respectively before and behind sprocket 28 and pulley
tected from kinking, etc., by the take-up mechanism of
the instant invention. Said power actuable means are
26. The bight of the loop of chain 30 will then pass
omitted completely in FIGS. 1 and 2 in order that the
along the lower side of sprocket 28 and between the two
, operation and structure of the hose take-up mechanism 10 said portions of link 27. The hydraulic drive means for
according to the instant invention may be clearly viewed.
the telescoping mast and the load carriage may, of course,
Disposed upon the base 11 of the main mast structure,
comprise a ram unit of the well-known free lift type
substantially adjacent main drive cylinder 1 is a manifold
where.n an intermediate cylinder initially raises the car
box 21 from which hydraulic ?uid under pressure is
riage to the upper end of the telescoping mast without
supplied by means of hoses 22, 23 to hydraulic drive
extension of the telescoping mast and, thereafter, the
means (not shown) mounted upon load carriage 15.
telescoping mast is elevated in unison with the carriage.
Hoses 22 and 23 are traced from manifold box 21 to
The problem with which the present invention is con
outer ends 24, 25 as follows, while outer ends 24, 25
cerned is the take-up of slack in hoses which conduct
are shown merely as abruptly cut otf end portions of
hydraulic ?uid to and exhaust ?uid from the hydraulic
hoses 22 and 23 it is to be understood that, in the usual 20 drive means mounted on the load carriage, and which
application, small additional portions of hoses 22 and
23 would extend generally within load carriage 15 to hy
draulic power driving means disposed thereupon. The
portion of hoses 22 and 23 (numbered 22, 23) passing
directly upward from manifold block 21 are shown as 25
are connected at one set of ends to the hydraulic drive
means mounted on the load carriage and at the opposite
set of ends to control valve means, not shown, on the
a single hose in FIG. 1 for the reason that, in the pre
a schematic diagram of the hose take-up system of the
ferred embodiment, hose 23 would be disposed directly
instant invention. Common numerals refer to the me
chanical elements found in FIGS. 1 and 2 and in the
behind hose 22 as viewed from the front of the truck.
Referring particularly to FIG. 3, there is shown therein
Hoses 22 and 23, side by side, continue generally up~
schematic drawing of FIG. 3. In the lower portion of
wardly from manifold block 21 and pass over pulley 30 FIG. 3 is shown manifold block 21 which is secured
26 of the free-?oating block assembly. The free-?oating
to main base structure 11, or other structure ?xedly
block assembly comprises pulley 26, sprocket 28, and
mounted with respect to main base structure 11. Hoses
link 27 the ends of which carry stub shafts on which
22, 23 are shown proceeding generally upwardly from
manifold blOck 21 to the point where they pass, side
28 ‘in freely rotatable parallel-axis relation. Hoses 22 35 by side, between the ?anges of and over pulley 26. Also
and 23, after passing over pulley 26 proceed thence sub
indicated in FIG. 3 are link 27 and sprocket 28. After
stantially downwardly to where they are secured to cross
passing over pulley 26 hoses 22, 23 proceed generally
brace 4, or where they terminate in a terminal block
downwardly to the point where they are clamped to
arrangement secured to the rear face of cross-brace 4 and
cross-brace 4 and diverge in opposite directions. It will
projecting rearwardly therefrom by a suitable, prede 40 be noted that the portions of FIG. 3 wherein hose 23
termined amount. Hoses 22 and 23 thence proceed re
lies behind hose 22 are indicated by double cross-hatch
spectively rightwardly and leftwiardly (or, alternatively,
ing, whereas the single lays of hose 22 and 23 are in
are disposed bearings carrying pulley 26 and sprocket
suitable rigid tubing connections proceed rightwardly and
dicated by single cross-hatching. After proceeding sub
leftwardly from said terminal block arrangement) to
stantially horizontally along cross-brace 4 to the areas
points immediately adjacent points 20 at which chains
45 at which chains 19 are fastened to cross-brace 4 hoses
19 are fastened to cross-brace 4. At said points immedi—
22 and 23 thence proceed upwardly in contact, or close
ately adjacent points 20 hoses 22 and 23 are clamped
adjacency, with chains 19. Chains 19 and hoses 22 and
to said cross-brace 4 and thereafter de?ected vertically
23 then pass upwardly over the tops of sheaves 17 where
upwardly, Whereafter they run adjacent to or in substan
after chains 19 proceed downwardly and are fastened
tial contact with chains 19. Alternatively, of course, 50 to load carriage 15. Hoses 22 and 23, after passing
where the rigid tubing connections suggested above are
over sheaves 17 with chains 19, continue downwardly
employed additional elbow type terminal blocks may be
and are fastened to carriage 15 adjacent the portions at
disposed approximately at points 20, and the upwardly
which chains 19 are fastened thereto. From this point
directed segments of hoses 22 and 23 may be attached
hoses 22 and 23 proceed to suitable couplings whereby
to said terminal blocks. Hoses 22 and 23, in contact 55 hydraulic ?uid is conveyed to hydraulic power means dis
with or substantially adjacent to chains 19 are run up
posed on the load carriage. Chain 30, as mentioned here
wardly and forwardly over sheaves 17 (chains 19 being
inabove, is a?ixed to the upper cross-brace 5 of the tele
reeved over said sheaves inwardly of hoses 22 and 23).
scopic mast and to the upper cross-brace 6 of the main
From the forward edge of sheaves 17 hoses 22 and 23
mast, and sprocket 28 is disposed in the bight portion
and associated chains 19 proceed substantially down 60 ‘of the downwardly depending U-shaped loop formed
wardly to the lower portion of carriage 15 to which chains
Referring to FIG. 1, the operation of the hose take-up
19 are secured for reasons noted hereinabove. Hoses
22 and 23 are clamped to carriage 15 by means generally
mechanism of the present invention is as follows. As the
indicated at 29. Directly below clamp means 29 hoses
telescoping mast is moved upwardly relative to the main
22 and 23 are shown as open endedly terminated at 24 65 mast by hydraulic ram unit 1 hoses 22 and 23 passing over
and 25, though it is to be noted that these open-ended
pulley 26 would tend to become slack if pulley 26 were
terminations are merely for the purpose of simplifying
?xed in vertical position. Pulley 26, however, is drawn
the illustrations herein and that in applications of the
upwardly by sprocket 28 and link 27 in an amount just
instant invention hoses 22 and 23 would normally ex
suf?cient to completely take up the slack which upward
tend a short distance beyond 24 and 25 to the supply 70 motion of the telescoping mast has a tendency to produce.
terminals of hydraulic power drive means. Returning to
Consideration of the con?guration of the loop formed by
the free-?oating block assembly, it is noted that a drive
hoses 22 and 23 passing from manifold block 21, over
chain, of the type generally employed in vehicle or ma
pulley 26, to cross-brace 4 will show that, since each incre
chine drives is associated with sprocket 28. One end
ment of hoses 22 and 23 subtracted from the bight of the
of chain 30 is secured to the upper cross-brace 6 of
loop of these hoses by the upward motion of the telescop
e.g., rope, wire rope, ‘so-called aircraft cable, or ‘other
varieties of chain than that described in connection with
FIGS. 1 and 2 hereiuabove. In the event that such a sub
of pulley 26 will move upwardly relative to the main mast
stitution is made for chain 30 alternative means may of
always one-half the distance that the telescoping mast
course be employed in the place of sprocket 28, e.g., a
moves upwardly relative to the main mast. Since pulley
sheave, or pulley, like those indicated by numerals 17 and
26, in order to keep hoses 22 and 23 taut, must move up—
26. Also it may be noted that load carriage 15 may be
wardly at one-half the rate of the upward movement of
carried on three pairs of rollers instead of two pairs of
the telescopic mast sprocket 28 coacting with chain 30
rollers in such manner that the portion of the carriage
and‘link 27 must provide upward motion to be trans
mitted to pulley 26 which is at a rate equal to one-half the 10 upon which a single pair of rollers is disposed may be
caused to travel above the upper end of telescopic mast 13.
rate of upward motion of the telescoping mast in order to
For convenience, in the claims the term f‘conductors‘f
achieve the desired result of eliminating all ,slack in
when used alone, will mean either a hose for conducting
hoses 22 and 23.‘ Considering, then, that portion of the
ingmast is halved in its effect by the fact that said ‘incre
ment acts along the entire length of the bight, the center
hydraulic ?uid or a similar medium or an electrical con
downwardly depending loop of chain 30 which is located
below cross-brace 6, it will be seen that when upward 15 ductor for conducting electric current, or a plurality, or
structural combination, of them. The term “?exible ele
motion of the telescopic mast, and its cross-brace 5, effec
ment” will cover a conductor or any other ?exible con
tively deducts an increment of chain 30 from said portion
necting member, such as a wire, rope, cable, chain, or the
said increment will, in effect, be deducted from both ends 4
like, which may not be employed to conduct energy from
of said portion, for which reason the deduction of a given
the truck to the carriage, but may be employed to transfer
increment of chain 30 from said portion (caused by a
energy, such as, for instance, the use of a pull cord con
1 given increment of upward motion of the telescopic mast)
tained in an outer sheath in the well known manner for
will cause an incremental upward motion of sprocket 28
the mechanical control of a valve on the load carriage.
and link 27 of precisely one-half the incremental upward
Also, such a ?exible element could be used as the com
motion of chain 30 (i.e., the incremental upward motion
of the telescopic mast). Thus, it may be seen that the 25 panion of a single hose, or by a simple and expeditious
mechanical modi?cation of the present invention in con
interrelation of sprocket 28 and chain 30 with the main
mast and the telescoping mast is such as to produce pre
junction with two- or more hoses.
cisely the incremental upward motion of sprocket 28 and,
thus, link 27 which will raise pulley 26 just su?iciently to
It will thus be seen that the objects set forth above,
might otherwise be produced between manifold block 21
be made in the above construction without departing from
the scope of the invention, it is intended that all matter
contained in the above description or shown in the accom
among those made apparent from the preceding descrip
eliminate completely the slack in hoses 22 and 23 which 30 tion, are e?iciently attained, and since certain changes may
' and telescoping mast cross-brace 4.
It is thus apparent‘ from the foregoing description that
panying drawing shall be interpreted as illustrative and
the present invention‘ provides a hose take-up mechanism
which positively moves by precisely the necessary amount 35 not in a limiting sense.
It is also to be understood that the following claims are
to at all times take up the slack in the hose, or hoses, and
intended to cover all of the generic and speci?c features
which is independent of the force of gravity and thus
of the invention herein described, and all statements of
cannot become stuck. While the traveling pulley 26 is
the scope of the invention which, as a matter of language,
shown as including sufficient space between its ?anges to
accommodate both hoses 22 and 23, this double-width 40 migh be said to fall therebetween.
H-aving described my invention, what I claim as new
pulley could be replaced by a pair of Single pulleys in
and desire to secure by Letters Patent is:
order to prevent binding and to better protect the hoses
from wear.
It is further pointed out that the hose take-up mecha
1. In a lift truck mast structure comprising a main mast
structure mounted vertically ?xed on a truck body, a tele~
nism of the present invention can be modi?ed without sub 45 scopic mast structure slidable vertically within said main
mast structure and a carriage slidably mounted upon said'
stantial alteration of any of the parts thereof to accom
telescopic mast structure, with a ?exible power-connect
modate a single hose. It is not necessary, as in more corn
ing cable connected between said truck body and said
plicated prior art devices, to provide a cable for insuring
carriage, means for controlling said ?exible power~con~
the proper take-up slack when the device of the instant
invention is employed in conjunction with a single hose. 50 nect-ing cable to prevent the formation of slack therein
as said telescopic mast structure and said carriage are
It will be further apparent that while the guides for the
moved, said means comprising a ?oating block member
hose have been shown in the form of pulleys, or sheaves,
having interconnected upper and lower sheave means and ,
they could assume other forms as well.
a second ?exible connecting element, said second ?exible
' The connections and adaptations of‘ the end portions
of hoses 22 and 23 terminating at a load carriage 15 in 55 connecting element being connected between said main
mast structure and said telescopic mast structure and
order to employ the ‘hydraulic ?uid pressure carried there
around said upper sheave means, said ?exible power
by to perform desired mechanical work, e.g., rotating an
connecting cable being reeved over said lower sheave
apron or extending a reach mechanism, will in most in
means, whereby movement of said ?oating block member
stances be a matter of routine design depending upon the
60 as said telescopic mast structure and said carriage are
carriage-mounted power‘ means to be actuated.
Hoses 22 and 23 may, of course, carry electrical con- , vertically adjusted operates to maintain taut said ?exible
power-connecting cable.
ductors therewith for actuating electrical devices mounted
2. Apparatus according to claim 1 including ?rst hy
upon the load carriage. These conductors could be utilized
draulic ram means connected to move said telescopic
for powering and controlling solenoids which, actuate the
valve members comprising part of the'hydraulic power 65 mas structure vertically with respect to said vertically
?xed main mast structure, and second hydraulic‘ ram
devices mounted upon the load carriage. The electrical
means connected to move said carriage vertically with
conductors could, of course, be separate from the hoses
and trained over the reeving elements in the same manner
respect to said telescopic mast structure, a portion'of said
as the hoses, or over separate reeving elements if desired.
?exible power-connecting cable between its ends being
Thevarious mechanical expedients (e.g., chains, sprock 70 ?xedly connected to said telescopic mast structure.
, ets, sheaves) employed in the illustrative embodiment
of FIGS. 1 and 2 may, of course, be replaced by other
alternative mechanical expedients which will occur to those
skilled in the materials handling art. For instance, chain
30 may be replaced by any other desirable ?exible means, 75
3. Apparatus according to claim 2 in which said second
hydraulic ram means is mounted on said telescopic mast
structure and connected to drive a further sheave ver
tically with respect to said telescopic mast structure, said
apparatus including a further ?exible cable connected over
said further sheave and between said telescopic mast struc
ture and said carriage.
4. Apparatus according to claim 3 in which said ?ex
ible power-connecting cable includes a portion having one
end ?xedly connected to said telescopic mast structure
and the other end ?xedly connected to means on said
carriage, and in which said portion of said ?exible power
connecting cable is reeved over said further sheave to
gether with said further ?exible cable.
5. Apparatus according to claim 1 in which said ?ex It)
ible power-connecting cable includes a ?rst portion of
?exible cable having one end connected ?xedly with re
spect to said truck body and another end ?xedly attached
to said telescopic mast structure, ' said ?rst portion of
?exible cable being reeved over said lower sheave means
of said ?oating block member.
References Cited in the ?le of this patent
Overbeck ____________ __ Nov. 22, 1955
Gibson ________ ___ ____ __ June 26, 1956
Vandemark __________ __ Sept. 18, 1956
Schenkelberger ________ __ May 7, 1957
Harris ______________ __ Apr. 12, 1960
Quayle ______________ _'_ June 21, 1960
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