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Патент USA US3046080

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July 24, 1962
e. D. GEARHART
3,046,070
WATER PUMP
Filed Feb. 8, 1960
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ATTORNEYS
United States Patent
flCQ
1
3,046,070
WATER PUMP
Glenn D. Gearhart, Beresford, S. Dale, assignor to Sioux
Steam Cleaner Mfg. Co., Inc., Beresford, S. Dak., a 5
corporation of South Dakota
Filed Feb. 8, 1960, Ser. No. 7,468
3 Claims. (Cl. 309-4)
This invention relates to a water pump and more par
ticularly to a water pump for steam cleaning apparatus.
In steam cleaners and other types of apparatus which
require water under pressure, it is sometimes desirable to
provide a water pump so that the apparatus can be utilized
3,045,970
Patented July 24, 1962
2
piston member 18 by engaging the threaded portions 22
and 24.
As shown in FIGURE 1, the two parts 18 and 19 are
axially aligned and are adapted to be adjusted axially of
each other by rotation of the sleeve 19! with respect to the
member 13 or vice versa to provide an annular groove 26
therebetween, having its axis parallel to the axis of the
piston as shown in FIGURE 1. The sleeve 19 is adapted
to be rotated by a wrench or other simple means. To
facilitate such rotation, the member 19 is provided with
?ats 27 on opposite sides thereof.
Suitable packing material is disposed in the groove 26
provided between the sleeve member 19 and the piston
member 18 and, as shown in FIGURE 2, can be in the
where water pressure is not available. Pumps heretofore
provided for this purpose have not been completely satis 15 form of one or more washers 28 which are provided with
factory and have given a great deal of trouble during
a hole 29. The washers are adapted to he slipped over
operation. There is, therefore, a need for a small, heavy
the piston member 18 so that they seat against the head
duty water pump which is long lasting and which requires
portion 21. Thereafter, the sleeve member 19 can be
infrequent maintenance.
threaded onto the piston member 18 until it seats against
In general, it is an object of the present invention to 20 the packing washers 28. The sleeve 19 is locked in place
provide a water pump which is particularly adapted for
by a lock nut 31.
supplying water under pressure and which is relatively
The piston member 18 is connected to a yoke 32 which
simple and easy to construct.
is threaded onto the piston member and is locked thereon
Another object of the invention is to provide a water
with a lock nut 33. The yoke 32 is connected to a con
pump of the above character in which packing is dis 25 necting rod 36 by suitable means such as a pin 37 and
posed intermediate the ends of a cylindrical piston.
the snap rings 38.
Another object of the invention is to provide a water
Operation of my water pump may now be brie?y de
pump of the above character in which the packing is in
scribed as follows. Let it be assumed that the water
engagement with the side wall forming the pump cylinder.
pump has been assembled in the manner shown in FIG
Another object of the invention is to provide a water
pump of the above character in which the packing can be
readily adjusted.
Additional objects and features of the invention will
appear from the following description in which the pre
ferred embodiment has been set forth in detail in con
junction with the accompanying drawing.
Referring to the drawing:
URE 1 and that the sleeve 19 has been screwed down
onto the packing material 28 and locked in place by the
lock washer 31 so that the packing material is slightly
compressed so that it is urged outwardly from the
groove between the members 18 and 19 and into engage
ment with the side wall forming the cylindrical bore. As
soon as this has been accomplished, the pump may be
utilized for pumping water as, for example, siphoning
FIGURE 1 is a side elevational view, partly in cross
water from a container or other suitable source and sup
section, showing a water pump incorporating my inven~
plying the water to a desired machine such as a steam
tion.
cleaner.
FIGURE 2 is an exploded view of the water pump as
It has been found that the construction hereinabove
shown in FIGURE 1.
set forth has many advantages over that of conventional
FIGURE 3 is a view looking along the line 3—3 of
water pumps. The positioning of the packing material
FIGURE 2.
45 has been found to be particularly important. The posi
In general, my water pump consists of a housing having
tioning of the packing intermediate the ends of the piston
a cylindrical bore therein and a piston slidably mounted
greatly reduces the wear on the piston itself and on the
in the bore. This piston consists of at least two separable
cylinder wall. The straight shoulders provided on the
cylindrical axially aligned parts. These parts are so posi
member 19 and the head portion 21 of the piston mem
tioned that they form an annular groove having its axis
ber 18 serve to accurately locate the packing material
parallel to the axis of the piston and in which is disposed
and serve to retain it so that it is not readily displaced.
packing material. One of the parts forming the piston
At all times the packing is accurately positioned and is
is adjustable axially with respect to the other part so that
maintained in such a manner that it is free to engage
the packing may be compressed to provide a relatively
with the side wall of the cylinder. When the packing
tight seal between. the piston and the cylinder bore.
55 becomes slightly worn, it is merely necessary to loosen
More in particular, my water pump as shown in the
the lock nut 31 and thread the sleeve member 19 axially
drawings consists of a pump housing or cylinder 11 which
onto the member 18 to further compress the packing
is provided with a longitudinal cylindrical bore 12, which
material. After the packing material has been com
on the left hand side as viewed in FIGURE 1, opens into
a conical portion 13, and on the right hand side as viewed 60 pressed suf?ciently, the lock nut is again tightened.
When the packing material becomes so worn that it is
in FIGURE 1, opens into a threaded opening 14. The
desirable to replace the same, the packing material already
housing 11 is provided with feet 16 for mounting pur
used within the pump can be readily removed by dis
poses.
assembly as shown in FIGURE 2 and new packing ma
A pump piston 17 is slidably mounted in the cylindrical
bore 12 and consists of at least two major parts, one of 65 terial placed thereon.
them being in the form of a bolt~like member 18 which
It is apparent from the foregoing that I have provided
also serves as a piston rod, and the other being in the
form of a cylindrical sleeve member 19. The bolt-like
a new and improved water pump which is particularly
adapted for heavy duty operation and which can be
readily adjusted when the packing material utilized be
piston member 18 has a cylindrical head portion 21 and
a threaded portion 22, whereas the sleeve member 19 has 70 comes worn. The pump is comprised of relatively few
a cylindrical bore 23 and an internally threaded portion
parts and is subject to very little wear. It can be economi
24 so that the sleeve member 19 may be mounted on the
cally fabricated and assembled.
3,046,070
3
4
I claim:
1. In a water pump, a housing having a cylindrical bore
therein and a port in one end opening into the bore, a
piston and a piston rod slidably mounted Within said bore
piston and piston rod slidably mounted Within said bore
for reciprocatory movement in said bore towards and
away from said port in said housing, said piston and
piston rod being comprised of a piston member having
a cylindrical head portion with a diameter slightly less
for reciprocatory movement in said bore towards and
away from said port in said housing, said piston and
piston rod being comprised of a piston member having
a cylindrical head portion with a diameter slightly less
than the diameter of the cylindrical bore, and a cylin
drical portion having a diameter substantially less than
the diameter of the cylindrical bore, a cylindrical sleeve
mounted on said cylindrical portion having a diameter
than the diameter of the cylindrical bore and a threaded
portion, a cylindrical sleeve threadedly mounted on said 10 substantially less than the diameter of the cylindrical bore,
said sleeve having a uniform diameter substantially iden
threaded portion of said piston member and forming an
tical to the diameter of the head portion and de?ning
annular groove between the sleeve and the head portion
one side of an annular groove formed between the sleeve
of the piston member, the axis of the groove being parallel
and the head portion of the piston member, the axis of
to the axis of the piston, packing material disposed in
the groove, said packing material being adapted to be 15 the groove being parallel to the axis of the piston, packing
material disposed in the groove, said packing material
compressed by axial movement of said sleeve with respect
being adapted to be compressed by axial movement of
to said piston member to thereby urge the packing mate
said sleeve with respect to said piston member to thereby
rial into engagement with the cylindrical side wall form
urge the packing material into engagement with the cylin
ing the bore, said sleeve having a uniform diameter sub
stantially identical to the diameter of the head portion 20 drical side wall forming the bore, said sleeve having a
and a length so that a substantial portion of the sleeve
engages the sidewall of the bore, said sleeve also having
a length so that a portion of the sleeve extends out of the
housing in at least one position of the piston and piston
rod so that the sleeve can be adjusted axially of the piston
member Without disassembly of the water pump, said
sleeve forming the sole means for guiding the portions of
the piston rod in the bore, remote from the piston and
length so that a substantial portion of the sleeve engages
the sidewall of the bore, the sleeve forming the sole means
for guiding the portions of the piston rod on the bore
remote from the piston, the sleeve also having a length
so that a portion of said sleeve extends out of the hous
ing in at least one position of said piston and piston rod
during reciprocatory movement of the same, tool engaging
means carried by said sleeve and adapted to be engaged
means mounted on said piston member for locking said
when said piston and piston rod is in said one position
sleeve in a predetermined axial position on said piston 30 to permit axial adjustment of the sleeve relative to the
member.
piston member, and nut means mounted on said piston
2. A water pump as in claim 1 together with connect
member for locking said sleeve in a predetermined posi
ing means connected to said piston rod, said connecting
means consisting of a yoke threadedly mounted on the
threaded portion of said piston member, and locking
means threadedly mounted on the threaded portion of
said piston member and serving to lock said yoke in a
predetermined position on said piston member, said con
necting means serving to prevent rotation of the piston
4O
rod during axial adjustment of the sleeve.
3. In a Water pump, a housing having a cylindrical bore
therein and a port in one end opening into said bore, a
tion.
References Cited in the ?le of this patent
UNITED STATES PATENTS
Re. 15,806
2,468,511
2,600,061
Harasta ______________ __ Apr. 1, 1924
Pilch _______________ __ Apr. 26, 1949
Lord _______________ __ June 10, 1952
2,907,614
2,918,339
Rosen ________________ __ Oct. 6, 1959
Hagadone ____________ __ Dec. 22, 1959
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