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Патент USA US2406485

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Aug. 27, 1946.
Filed May 5, 1944
' z Sheets-Sheet 1
Patented Aug. 27,1946
» 72,406,485
Harold A. Arnold, Knoxville, Tenn., assignor to
The University of Tennessee Research Corpo
ration, Knoxville, Tenn., a corporation of Ten
Application May 5, 1944, Serial No. 534,274
7 Claims. ' (Cl. 103-149)
The present invention relates to pumps com
prising a ?exible hose and rotating members or
Fig. 7 is a sectional view on the line 1-1 of
Fig. 1 looking in the direction of the arrows;
rollers engaging and compressing the hose to
Fig. 8 is a, sectional view on the line 8-8 of Fig. '
exhaust successive charges of liquid or gases
1 looking in the direction of the arrows;
therefrom. ~Such pumps are highly desirable in
Fig. 9 is a detail similar to Fig. 1, with a band
their simplicity and cheapness but in the past
interposed between the rotating members or roll
have been objectionable, among other things, be
ers and the hose;
cause of lack of ef?ciency and durability and
Fig. 10 is an end elevation corresponding to
because of creepage and. wear of the hose.
Fig. 9;
The objects of the present invention, among 10 Fig. 11 is a cross sectional view on the line
others, are to provide a hose pump that avoids
ll—ll of Fig. 5 looking in the direction of the
all of these objections and has maximum ei?
ciency and durability for pumping both viscous
materials and gases.
These desired results are
Fig. 12 is a cross sectionaI view on the line
I2—I2 of Fig. Slooking in the direction of the
secured by a preliminary stretching or tension 15' arrows;
ing of the hose over the rotating members or
Fig. 13 is a cross sectional view on the'line
rollers, and this preliminary stretching or ten
I 3—l3 of Fig. 5 looking in the direction of the
sioning of the hose insures a complete but suc
cessive closing or sealing of the opening therein
Fig. 14 is a. crosssectional view through the
when the rotating members or rollers progres 20 hose on the line “1-44 of Fig. 5 looking in the
sively compress the hose. This effective closing
direction of the arrows; and
or sealing enables the desired suction or pres
Fig. 15 is a detail.
sure within reasonable limits to be obtained.
Referring to the drawings, wherein like refer
Other objects are to provide a pump of simple
en'ct numerals indicate like parts, 20 indicates
construction that may be economically manu 25 a conventional base supported by legs 2| for a
factured and readily assembled, one which re
motor 22 which drives a rotor or carrier, here
quires no by-pass valve to relieve against excess
shown as a pulley 23, through a belt 24.
pressure, one whose operation is not adversely
The‘pulley 23 is mounted on a shaft 25 that
aifected by the drying or caking of small amounts
is carried by an upright 26 suitably ?xed to‘ the of viscous ?uids such as molasses,v one which is 30 base 20 as by brackets 21. As here shown (Fig. 7)
not adversely affected by corrosive materials such
the shaft ‘25 is secured to the upright 26 by means
as phosphoric acid, one which does not expose
of nuts 28 and washers 29. The shaft 25 carries
wearing or mechanical moving parts such as
a'sleeve 30‘ which rotates thereon and is posi
pistons, valves, and impellers to sticky viscous
tioned on ‘said shaft by a nut 3| and washers 32.
or corrosive ?uids, one that is as readily cleaned
- The sleeve 30 carries the rotor or pulley 23 which
as a piece of hose, tubing or pipe, one that has
is held in position by a nut 33 engaging a screw
practically a 100 per cent volumetric displace
threaded portion 30' of said sleeve 30.
ment e?iciency for pumping gases or producing
The pulley 23 carries a- plurality of pintles}
a high vacuum, and one that is adapted for
34, '35 and 36. Each of these pintles is secured
pumping liquids with high vapor pressures or for
to the sprocket by nuts 31 and 38 (Fig. 8) engag
pumping vaporous chemical compounds such as
ing a screw threaded portion 39 of the pintle.
ammonia hydroxide.
The other ends of each of these pintles project
- The invention will be better understood by ref
through and are carried by a plate ‘40 mounted
erence to the accompanying drawings wherein
on the sleeve 30. The ends of the pintles project—
ing through the plate 40 are preferably screw
Fig. 1 is an elevation of the novel pump;
threaded at 4| and carry nuts 42 that engage
Fig. ,2 is a, corresponding plan view;
with plate 40 to hold the pintles 34, 35 and 36
Fig. 3 is an end elevation view partly in sec
tion on the line 3—-3 of Fig. 1;
Fig. 4 is a detail of the rotating members or
rollers and a band for insuring the same speed
of'rotation thereof;
- Fig. 5 is a detail corresponding to Fig. 1;
Fig. 6 is a cross sectional view of a modi?ed
-form of hose; '
in ?xed position. Thepintles 34, 35 and 36 carry
the sleeves 34', 35' and 36'.
- l
The hose 43 is looped over the rotating mem
bers or sleeves 34’, 35’ and 36' and stretched'or’
tensloned to the extent desired for a particular
pumping pressure. As herein shown, the end 43'
of the hose‘ is adjustably connected to a pipe ?t
ting 44 on the suction side 01' the pumpand the
point about 30° from line l4—|4, Fig. 5. In Fig.
end 43" of the hose is connected to a pipe ?t
ting 45 on the discharge side of the hose. The
extremities of the hose are secured to the pipe
?ttings 44 and 45 by suitable screw threaded
couplings 46 and 41 so that the desired stretch
ing or tensio-ning of the hose can be secured by,
13 the walls of the hose have contacted at 430
while at the marginal extremities 43d there is
no contact, this cross section being at a point‘
about 13° from the line l4—|4, Fig. 5. In Fig.
14 is shown the point of maximum compression
and in this ?gure there‘ is ,shown' at" 43c a com
plete closing or sealing of the opening of the
hose. This condition of complete seahng is
manipulation of these couplings.‘ The pipe ?t-‘
tings 44 and 45 are clamped in position between
base 20 and base member 20' by means of bolts
48 ‘and nuts 49.
facilitated and insured by the preliminary‘
Instead of providing couplings 46 and “for
the stretching and extension of the hose 43;,it'v
.. stretching or tensioning of the hose over the
rotating members. The completeness of the
sealing has a‘ direct, in?uence on the ‘efficiency
of the suction lift and pressure. As shown a
willrbe understood that the‘ extremities of the‘
hose may be ?xedly secured we suction source‘ " hose 6f the proper wall thickness, elasticity and
and discharge means and the‘ pintle's '34-,v 35 and
flexibility is fully rounded in all parts except
36 adjusted radially along slots 34a, 35a and 36a
at or adjacent the position 'of the rollers as
(Fig. 15) in the plate 40 andnsim-ilar slots (not
shown in Fig". 5; Thus each roller imparts a
shown) in the pulley 23, the pintles being
stripping action on the hose, forcing the liquid
clamped in the desired position of adjustment
or gas in the hose to move ahead of the pro
by any suitable'or conventional means. Further 20
gressive but continuous closing action of the
this stretching or extension can be effected by
roller‘ on the hose. The ability of the hose to
moving the pipe ?ttings 44 and 45- downwardly,
round‘ itself after the passing of thetroller creates
or by an adjustment of the support 26 which is
a partial vacuum in back of the roller or allows
permitted by slot 48' therein (Fig. 3) or an ad
justment of shaft 2'5 in slot 25'.
25 additional ?uidwor gas to fill up the hose by
displacement. Thus the movement of the liquid
- For purposes of illustration the rotation of
through the hose is continuous at a velocity equal
to the peripheral speed of the rollers.
I have found that the opening in the hose can
the pulley 23 carrying the pintles and sleeves
over whichv the hose 43 is looped and stretched
is counterclockwise. Unless some provision were
made to insure that the several sleeves carried 30 be more readily closed or sealed if it is provided
with longitudinal notches or _’channels 54 as
by' the pintles rotated in unison and at the same
shown in Fig. ‘6 in which event, however, the hose
speed each sleeve leaving the position 36 would
should be reihfor'cedhat ‘54' opposite the notched
stop rotating due to_fri'ction in the bearing.- As
interior wall so that the hose will round out again
they sleeve reached the position of sleeve 35 and
afterth'é passage of) the compressing roller and
contacted the hose it would suddenly be forced 35 thereby
counteract the collapsing effects of high
to rotate, and the friction between the sleeve
outside or low inside atmospheric pressure. _
and the hose would wear a notch and ?nally a
I have as; found’ that this provision of a
hole at that point although the remainder [of ' preliminary
stretching or tensioningof the hose
the hosewould be practially free of wear. ' To
' avoid this contingencylmeans; are provided in 40
looping the same over the rotating members
met "sfe's the by-pass eifects of the hoserby faci-lie
the form of an elasticband 50 (Figs. 4 and‘ 8),'
which is carried in a groove 58’ ingthe outer end
of eachof the sleeves 34’, 35' and 36'». This band
provides "a driveibet'ween the sleeves and‘keeps
all of them turning at the same speed although
one may‘ not be in contact with the hose. This
provision eliminates localized wear on the hose.
isa manifest advantage that the present hose
' transverse expansion outwardly in alldi
rections 'in'the presence of excess pressure, and it
eliminates the usvIalby-pass valves- and
" condiiits.
b‘pu‘mp embodying the present invention
is not only siinple in construction, easy to assem'e
A'further expedient for preventing localized
bre'aea disassemble,‘ but cheap to manufacture. '
wear on the vhose is to interposebetween- the
be‘ adjusted by a preliminary stretching
rotating rnemberswor sleeves and the hose a band 50 0r tens-ioning
of the hose over the rotating meme
5| ‘(Figs. 9 and 710.) which prevents any contact
users to pump any pressure within limits without
between the rotating members “and. the hose.
This band could‘be continuous like band 50_or|
one end 9f the band could be fastened to the
adversely aifecting the'suction lift or the “closing
other end '53 of the band free.
vacuumtpum‘p and therefore is “self-priming.”
Milk _atl93° F. was boiled, under vacuum created
by this hose pump and wild onion flavors, unless
exceptionally strong, were removed from the milk. f
or sealing of the opening in the hose. It can be
support 25 by a nail or, fixture 52 leaving the 55 used'to pump heavy viscous materials, such as
molasses; or to pump gases.
The operation _of the device will be_ readily
understood by reference to Fig. 5 andFigs. .1-1,
12, 13 and 14,.‘ The stretched hose 43 which
maybe the standard milking machine hose, such
as De Lavalhhaving a 1A; inch wall “thickness
a 1”—6 inch inside diameter or De Laval 'No.
.0166and vI. H'.-_C. 12274CA 11;? inch inside diam
It is an effective
It is not affected adversely ‘by corrosive acids,
such as phosphoric acid, nor is it affected by the
drying and caking of small amounts of molasses;
and it does not clog with dirt or sludge. The
stretched over the rotating members or sleeves 65 pumps with more than bile nose of varying sizes
eterand "V8 inch outside diameter is looped and
to theextent desired for a particular suction
lift andv pressure.__ When ‘so stretched and posi
tioned the hose will have the cross sectional con
?guration shown in Fig. 11 at all points except
at and adjacent the position of the roller 34' in
Fig. 5 where it will have cross sections ‘shown in
Figs. 12, 13 and 14., In Fig. 11 the opening ‘43a
of the hose is round and undistorted, In Figs
12 the opening 48b has been vvelongated and hat‘
depending ‘Oh the relative capacities desired, have
been used as metering, 'prpportiomn-g and mixing
devices for substances such as molasses and ‘acids
for legume silage and as-meterin'g and proportion
ing devices on liquid fertilizer distributors.
While I have disclosed ‘herein ‘the best embodi;
ment of the inventive idea
to me, iti's to
be understood that the ‘invention is susceptible
of ‘other mechanical embodimentswitnm? the inn
terfed by the rol'le'r;, ‘this cro‘ss'se'ction.beingfat ‘a1 75 / its of the appended claims, and it is Ttb‘bé serum
ularly noted that while I have herein shown three
the hose stretched and tensioned at said desired
rotating members that act to support and succes
degree and to compress said hose for perform
sively compress the hose, additional rotating
ance of the pumping operation.
members may be employed depending on the
5. A pump c0mpriSing a hose adjustably con"
length and number of the suction strokes de
nected to a source of ?uid and a discharge ele
ment, and a movable element provided with a plu
What is claimed is:
rality of rollers over one of which the hose is
1. A pump comprising a hose stretched beyond
stretched and tensioned to the desired degree to
its normal length, and a plurality of. members
produce the desired pump pressure, said rollers
operable one after another to keep the hose 10 being operable by said member one after another
stretched and compress it for performance of the
to keep the hose stretched and tensioned and to
pumping operation.
compress it for performance of the pumping op
2. A pump comprising a hose stretched beyond
eration, said hose being expanded outwardly in
its normal length and connected to a source of
all directions upon production of excess ?uid
?uid and a discharge element, a rotating support,
and a plurality of members‘ carried therebynsaid
members being rotated into. and out of engage
pressure therein to thereby afford a by-pass ef
fect and eliminate the necessity for by-pass valves
and conduits.
ment with the hose and" operable one after an
6. In a pump of the type comprising a rotor
other to keep it stretched and effect the pumping
provided radially of its axis of rotation with
operation, said hose being transversely expansible 20 spaced .hose compressing elements, a hose ar
outwardly in all directions to relieve any excess
ranged to be compressed by said elements and
pressure produced therein.
provided interiorly thereof along its length with
3. A pump comprising a'tensioned hose, a mov
a notch or channel enabling the opening in the
able support, a plurality of rollers rotatably
hose to be completely closed when said hose is
mounted on said supportfand movable thereby 25 compressed by said elements.
into and out of engagement with the hose to ef
'7. A pump element comprising a hose provided
fect the pumping operation, and a connection
interiorly thereof along its length with oppositely
between‘ said rollers to cause all of them to ro
disposed notches or channels enabling the open
tate on their own axes at the same speed.
ing in the hose to be completely closed by com
4. A pump comprising a hose adjustably con 30 pression and resilient reinforcements on the out
nected to a source of fluid and a discharge ele
side of the hose opposite the notched interior wall
ment, and a rotating member provided with a
plurality of rollers over one of which the hose is
initially stretched and tensioned to the desired
degree to produce the desired pump pressure, said 35
rollers being operable one after another to keep
insuring a more uniform wall resiliency and
strength for normal opening or expansion of the
hose to its initial shape and producing an ellip
tically shaped hose.
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