Patent US4419058A successfully refreshed from Google Patents.
US4419058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pump rotating group axial alignment structure
Assignee: Motors Liquidation Co
•
Filing: 1981-06-08
•
Granted: 1983-12-06
•
Expires: 2001-06-08
Abstract
Abstract A vane type hydraulic pump has a pressure plate, thrust plate, cam ring, rotor and vanes, which when assembled, are denoted as the pump rotating group. The thrust plate, pressure plate and cam ring are maintained in axial and angular alignment by a pair of dowel pins which extend between the plates and through the cam ring with a close fit relationship. The plates and cam ring are restrained from rotation by a dowel pin which extends between a close fit in the pump housing and a loose fit in the pressure plate. The rotating group is disposed in a cylindrical cavity in the pump housing which cavity has a diametral dimension cooperating with the outer diameter of the pressure plate and thrust plate to provide a sliding pilot fit at assembly thereby sharing the axial alignment constraint of the pair of dowel pins.
Inventors
- 👤 Leonard N. Franklin, Jr.
- 👤 Gary G. Hegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:54
CPC Classifications
F; F04; F04C; F04C15/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49236; Y10T29/49245; Y10T403/00; Y10T403/16; Y10T403/1616; Y10T403/1624
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A vane pump assembly comprising; a housing, a pressure plate piloted in said housing; a cam ring disposed in said housing adjacent said pressure plate; a thrust plate piloted in said housing adjacent said cam ring; a pair of alignment dowel pins each extending from a close fit in a blind opening in said pressure plate, through a close fit opening in said cam ring and into a close fit blind opening in said thrust plate to maintain axial and angular alignment of said plates and ring; and reaction means extending between said housing and said pressure plate in a loose fit relation in at least the circumferential direction for limiting rotary motion of said pressure plate relative to said housing, and through the alignment pins also limiting rotation of the thrust plate and cam ring.
Claim 2
Dependent Claim
136 words
A vane pump assembly comprising; a housing, a pressure plate piloted in said housing; a cam ring disposed in said housing adjacent said pressure plate; a thrust plate piloted in said housing adjacent said cam ring; a pair of alignment dowel pins each extending from a close fit in a blind opening in said pressure plate, through a close fit opening in said cam ring and into a close fit blind opening in said thrust plate to maintain axial and angular alignment of said plates and ring; and reaction means extending between said housing and said pressure plate in a loose fit relation in at least the circumferential direction for limiting rotary motion of said pressure plate relative to said housing, and through the alignment pins also limiting rotation of the thrust plate and cam ring.
Claim 3
Dependent Claim
146 words
A vane pump assembly comprising; a housing, a pressure plate piloted in said housing; a cam ring disposed in said housing adjacent said pressure plate; a thrust plate piloted in said housing adjacent said cam ring; a pair of alignment dowel pins each extending from a close fit in a blind opening in said pressure plate, through a close fit opening in said cam ring and into a close fit blind opening in said thrust plate to maintain axial and angular alignment of said plates and ring; and reaction pin means extending between a close fit blinding opening in said housing and a loose fit aperture in said pressure plate in at least the circumferential direction for preventing continuous rotation while controlling positioning of said pressure plate relative to said housing, and through the alignment pins also preventing rotation of the thrust plate and cam ring.
Claim 4
Dependent Claim
146 words
A vane pump assembly comprising; a housing, a pressure plate piloted in said housing; a cam ring disposed in said housing adjacent said pressure plate; a thrust plate piloted in said housing adjacent said cam ring; a pair of alignment dowel pins each extending from a close fit in a blind opening in said pressure plate, through a close fit opening in said cam ring and into a close fit blind opening in said thrust plate to maintain axial and angular alignment of said plates and ring; and reaction pin means extending between a close fit blinding opening in said housing and a loose fit aperture in said pressure plate in at least the circumferential direction for preventing continuous rotation while controlling positioning of said pressure plate relative to said housing, and through the alignment pins also preventing rotation of the thrust plate and cam ring.
References Cited (Backward Citations)
US3198127A
Cited
US3207077A
Cited
US3421413A
Cited
US3334591A
Cited
US3491699A
Cited
US3632238A
Cited
CA962131A
Cited
US3827834A
Cited
DE2312873A1
Cited
UST927009I4
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |