U.S. patent number 3,738,784 [Application Number 05/099,057] was granted by the patent office on 1973-06-12 for pump housing for use with top mounted or remote mounted reservoirs.
This patent grant is currently assigned to TRW Inc.. Invention is credited to George A. Berman, Hubert M. Clark.
United States Patent |
3,738,784 |
Clark , et al. |
June 12, 1973 |
PUMP HOUSING FOR USE WITH TOP MOUNTED OR REMOTE MOUNTED
RESERVOIRS
Abstract
A compact housing construction for a power booster pump of the
type having a stack-up of parts forming an operative pump unit
wherein first and second axially disposed housing parts together
form a cylindrical housing envelope for enclosing the stack-up of
parts, the parts being sized and shaped to form complementary inner
and outer diameters with a seal groove and a locking groove formed
therein so that one part may be inserted within the other. One of
the parts has an inlet opening for connection to a top mounted or
remote mounted reservoir.
Inventors: |
Clark; Hubert M. (Birmingham,
MI), Berman; George A. (Detroit, MI) |
Assignee: |
TRW Inc. (Cleveland,
OH)
|
Family
ID: |
22272373 |
Appl.
No.: |
05/099,057 |
Filed: |
December 17, 1970 |
Current U.S.
Class: |
418/270; 417/310;
418/135 |
Current CPC
Class: |
F04C
14/26 (20130101); F04C 15/00 (20130101); F01C
21/10 (20130101) |
Current International
Class: |
F01C
21/10 (20060101); F04C 15/00 (20060101); F01C
21/00 (20060101); F01c 021/00 (); F03c 003/00 ();
F04c 015/00 () |
Field of
Search: |
;418/70,149,270
;417/300,310 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Croyle; Carlton R.
Assistant Examiner: Vrablik; John J.
Claims
We claim as our invention:
1. In a power booster pump,
a header having an outside diameter forming a cylindrical wall,
a cylindrical cup-shaped shell housing having an end wall and a
circumferentially continuous side wall receiving said header in
inserted assembly and for enclosing an axial stack-up of parts
forming an operative pump unit,
said header having an axial bore formed therein for journalling a
shaft and for receiving and retaining a shaft seal and a shaft
bearing means,
said end wall of said shell housing having a centrally disposed
opening in which is mounted an externally threaded discharge
nipple,
a bail having one end connected to said discharge nipple and the
other end connected to said header,
thereby to facilitate connection of the pump to a mounting
surface,
said side wall having an inlet forming means connected thereto and
forming a coupling adapted for connection to a flexible coupling
leading to a remotely disposed reservoir.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to power booster pumps and more
particularly to a compact housing construction for a power booster
pump adapted to be connected to a top mounted or remote mounted
reservoir.
2. The Prior Art
The prior art is exemplified by U.S. Pat. No. 3,200,752 wherein is
disclosed a power booster pump which has been widely used in the
automotive industry as a power steering pump.
In many vehicle installations, particularly in compact or foreign
automobiles, and in trucks and tractors, where pumps may be gear
driven from the engine, the power booster pump disclosed in U.S.
Pat. No. 3,200,752 is too large in size to assemble in the space
available. Further, in many instances, the location of the pump is
required to be such that a reservoir mounting remote from the pump
is required in order that the reservoir be accessible for easy
filling.
SUMMARY OF THE INVENTION
In accordance with the present invention, a compact housing
construction is provided which is capable of utilizing a maximum
number of the parts and assemblies constituting a stack-up of parts
as shown in U.S. Pat. No. 3,200,752 and which form an operative
pump unit. The compact housing construction features the
utilization of first and second axially disposed housing parts
which together form a cylindrical housing envelope for enclosing
the stack-up of pump unit parts.
The housing parts are sized and shaped to form complementary inner
and outer diameters with a seal groove and a locking groove formed
therein. A seal ring is situated in the seal groove and a locking
ring in the locking groove, thereby to retain the housing parts in
sealed-together assembly when one of the housing parts is inserted
within the other of the housing parts.
Further, one of the housing parts has formed thereon means
providing an inlet opening for connection to a top mounted or a
remote mounted reservoir.
In one form of the invention, the inlet opening intersects a flat
mounting surface so that a top mounted reservoir may be situated
directly superjacent the pump housing.
In another form of the invention, a boss providing the inlet
opening has a nipple connection for coupling to one end of a
flexible conduit. The other end of the flexible conduit is
connected to a reservoir disposed at a location remote from the
pump.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is an end elevational view with parts broken away and with
parts shown in cross section showing a compact housing construction
for a power booster pump in accordance with the principles of the
present invention;
FIG. 2 is a cross sectional view taken on line II--II of FIG.
1;
FIG. 3 is a somewhat reduced view from the opposite end of that
shown in FIG. 1 and showing parts broken away to illustrate
additional details of the pump construction;
FIG. 4 is a cross sectional view showing an alternative
construction in accordance with the principles of the present
invention;
FIG. 5 is an end view of the pump shown in FIG. 4; and
FIG. 6 is an end view from the opposite end of FIG. 5 and showing
the pump connected to a remote reservoir.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention is directed to a compact housing construction
which is adapted to utilize and retain a maximum number of parts
and assemblies as used in a power booster pump similar to that
disclosed in U.S. Pat. No. 3,200,752. Accordingly, it will be
understood that the actual operative portions of the pump unit
contained within the compact housing construction of the present
invention may correspond generally to such parts as are shown in
U.S. Pat. No. 3,200,752. Thus, there is a lower pressure plate 10,
a cam ring 11 forming a pumping chamber for a rotor 12 carrying a
plurality of slippers 13. An upper pressure plate 14 is provided
and a combination pressure plate and valve body is shown at 16. A
spacer plate 17 may be interposed between the upper pressure plate
14 and the valve body 16.
A flow control valve is contained within the valve body 16 and is
shown generally at 18. Thus, the flow control valve 18 comprises a
spool 19 carrying a relief valve assembly shown at 20. The valve
contains a flow orifice 21 and flow from a discharge passage 22 in
excess of flow requirements is directed to a by-pass 23 back to the
pump inlet. Fluid at pump generated outlet pressure is discharged
into a discharge zone 24 and pressure loads the combination
pressure plate and valve body 16, thereby to load the stack up of
parts comprising the operative pump unit. Pressure plate springs
are provided one of which is shown at 26.
In accordance with the principles of the present invention, the
compact housing construction comprises first and second axially
disposed housing parts which together with one another form a
cylindrical housing envelope for enclosing the stack-up of parts.
In the form of the invention shown in FIG. 2, a cast housing is
used to accept the power booster pump components. The housing is
shown generally at 30 and constitutes a generally cylindrical
member in which is machined a bore 31 adapted to receive a bearing
means shown at 32 and at 34 for journalling a shaft 33. A shaft
seal is also received at 36, the shaft 33 being located in place by
a shaft retainer ring 37.
The inner end of the shaft 33 has formed thereon splines as at 38
thereby to effect a driving connection with corresponding splines
39 formed interiorly of the rotor.
The housing 30 is counterbored thereby to form an end wall 40
forming a bottom face of an enclosure having an inner diameter size
to receive the various pump components previously referred to.
Thus, there is left an outer circumferentially continuous wall 41
particularly characterized by having formed inwardly adjacent the
open end thereof a sealing ring groove 42 and a locking ring groove
43. If desired, a median portion of the inner diameter of the
circumferentially continuous wall 41 may have a section 44 in which
is received the spacer or separator plate 17 as well as the
pressure plate 14 and valve body 16. An O-ring sealing member 46
may be interposed between the surface 44 and the valve body 16,
thereby to separate the interior of the cylindrical enclosure into
an inlet area shown at I and an outlet area shown at O.
Received within the groove 42 is an O-ring sealing member 47 and
received within the groove 43 is a locking ring 48.
Also received within the inner diameter of the circumferentially
continuous wall 41 is a cover member shown generally at 50 and
comprising an end wall extending across the open end of the
cylindrical enclosure and including an axial wall portion 51
adapted to be engaged by the seal ring 47 and terminating in a
circumferentially continuous shoulder 52 adapted to be abuttingly
engaged against the locking ring 48.
The end wall of the cover 50 is formed with embossed portion as
shown at 53 thereby to bottom the pressure plate springs, one of
which is shown at 26 in FIG. 2.
As shown in FIGS. 1 and 3, the housing 30 is formed with a boss 60
having a passage 61 communicating with the outlet area O and
through which fluid at pump generated pressure is directed through
the passage 61, a passage 62 and a seat member 63 adapted to engage
the coupling portion of a conduit leading to a point of
utilization. To accommodate the coupling function, an outlet
opening is shown at 64 threaded for cooperation with an appropriate
coupling member.
The boss also has a flattened surface 66 intersected by an inlet
opening 67, thereby to facilitate mounting on the flat surface 66
of a top mounted reservoir.
The form of the invention shown in FIGS. 4, 5 and 6 utilizes an
alternate construction wherein a header is shown at 70 and is
turned to an outside diameter 71 to fit the bore 72 of a drawn
steel shell 73.
In this form of the invention, the header 70 has a groove 74
receiving an O-ring sealing member 76 and a drawn steel shell has
an embossed groove 77 adapted to receive a locking ring 78.
The header is machined to provide a bore 31a in which is received a
bearing 32a for journalling a shaft 33a. A shaft seal is provided
at 36a.
The header 70 is further provided with an end or bottom wall 40a
and includes recesses 79 for receiving dowel pins 80. The same
general stack-up of parts is provided as previously referred to
including lower pressure plate 10a, a cam ring 11a, a rotor 12a
carrying a plurality of slippers 13a spring-biased by slipper
springs 131 and the rotor being driven off the shaft by a splined
connection shown at 38a. A combined upper pressure plate and
separator plate is shown at 14a and a valve body is shown at 16a
pre-loaded by pressure plate springs designated at 26a. An O-ring
sealing member 46a establishes a seal between the valve body 16a
and the circumferentially continuous wall 73 of the drawn steel
housing, thereby to separate the interior of the housing into an
outlet area O and an inlet area I.
The drawn steel shell includes an end wall 81 having a centrally
disposed opening 82 in which is mounted a discharge nipple 83
externally threaded as at 84 and having a flange 86 to facilitate
connection by a weldment shown at 87.
A fastening nut 88 engages the threads 84 and locks the end of a
bail 89, the other end of the bail being connected to the header 70
by means of studs as at 90. Thus, the bail 89 may be used for
connecting the pump to a suitable mounting surface.
In accordance with the present invention, means are provided
forming an inlet for the compact housing construction and such an
inlet forming means is shown at 91 and may be conveniently welded
to the steel shell in register with an inlet opening 92. A nipple
coupling is shown at 93 by means of which the inlet may be
connected to a flexible conduit 94 leading to a reservoir 96
situated and disposed at a location remote from the pump. The
reservoir has a cover 97 and a filling opening 98. It will be
appreciated that even though the pump may be relatively
inaccessible, the filling opening 98 and the top of the reservoir
96 may be conveniently located in an accessible position for
servicing purposes.
By virtue of the compact housing construction thus provided, a
trusted and reliable power booster pump unit may be effectively
utilized in areas of considerably restricted space. Further, the
housing constructions thus provided facilitate utilization of the
pump with either a top mounted reservoir or with a reservoir
located and disposed in a remote location relative to the actual
pumping unit.
Although minor modifications might be suggested by those versed in
the art, it should be understood that we wish to embody within the
scope of the patent warranted hereon all such modifications as
reasonably and properly come within the scope of our contribution
to the art.
* * * * *