Patent US4354808A successfully refreshed from Google Patents.
US4354808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vane pump having sleeve bearing and rotor retaining construction
Assignee: ZF Friedrichshafen AG
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Filing: 1980-01-15
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Granted: 1982-10-19
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Expires: 2000-01-15
Abstract
Abstract A mode of assembly for a vane pump rotor and drive shaft provides a construction wherein a plain, i.e., sleeve or collar type bearing can be used for the support of the drive shaft. The arrangement affords axial positional securing, i.e., axial fixation of the drive shaft with a spring ring peripherally confined by a recess in the pump rotor to prevent its being dislodged and thus affording safety in maintaining axial securement of the drive shaft.
Inventors
- 👤 Rudolf Ilg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:28
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0057; F04C15/0076; F16; F16B; F16B2200/00; F16B2200/69; Y; Y10; Y10T; Y10T403/00; Y10T403/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
In a vane type pump having a drive shaft extending into the bore of a rotor having the drive shaft keyed in the rotor bore and being supported in a sleeve bearing at one side of said rotor and said pump having a face plate at the opposite side of said rotor adjacent the free end of said drive shaft; the improvement comprising: a groove (8) in said drive shaft and an annular open face recess (11) at an end of the bore of said rotor encompassing said groove; a retaining ring (10) carried in said groove and confined radially within said recess against being dislodged from said groove to axially secure said drive shaft; wherein the depth of said annular recess is at least equal to the thickness of said retaining ring in addition to a predetermined axial clearance between the drive shaft end and said face plate; wherein said recess is open towards said face plate and said face plate has a recess (9) to accommodate said drive shaft end with said axial clearance; said latter recess having a diameter less than the diameter of said retaining ring so as to axially retain said retaining ring in said recess in said rotor.
Claim 2
Dependent Claim
204 words
In a vane type pump having a drive shaft extending into the bore of a rotor having the drive shaft keyed in the rotor bore and being supported in a sleeve bearing at one side of said rotor and said pump having a face plate at the opposite side of said rotor adjacent the free end of said drive shaft; the improvement comprising: a groove (8) in said drive shaft and an annular open face recess (11) at an end of the bore of said rotor encompassing said groove; a retaining ring (10) carried in said groove and confined radially within said recess against being dislodged from said groove to axially secure said drive shaft; wherein the depth of said annular recess is at least equal to the thickness of said retaining ring in addition to a predetermined axial clearance between the drive shaft end and said face plate; wherein said recess is open towards said face plate and said face plate has a recess (9) to accommodate said drive shaft end with said axial clearance; said latter recess having a diameter less than the diameter of said retaining ring so as to axially retain said retaining ring in said recess in said rotor.
References Cited (Backward Citations)
US2435279A
Cited
US3200752A
Cited
US3709530A
Cited
DE2327566A1
Cited
UST927009I4
Cited
DE2423773A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |