US3221564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston shoe construction for axial piston pump
Assignee: MILL AND MINE SERVICES Inc A CORP OF
•
Filing: 1962-01-18
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Granted: 1965-12-07
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Expires: 1982-01-18
Abstract
No abstract record available.
Inventors
- 👤 Robert E Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:16
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/0082; F01B3/0085; F01B3/0088; F01B3/0002; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18336; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A PISTON CONSTRUCTION FOR ENGAGEMENT WITH THE CAM MEANS OF A HYDRAULIC MACHINE, THE COMBINATION OF A METAL CASING SURROUNDING A PISTON SHOE MEANS FORMED OF LOW FRICTION MATERIAL AND MOUNTED ON A BALL-SHAPED PISTON FOOT, AND SHOE MEANS INCLUDING A SIDE WALL PROVIDED WITH A RECESS, THE LOWER PORTION OF SAID METAL CASING INCLUDING AN INNER SHOULDER DISPOSED IN SAID RECESS SAID SHOE MEANS INCLUDING A BEARING SURFACE EXTENDING OUTWARDLY OF SAID METAL CASING FOR ENGAGEMENT WITH SAID CAM MEANS.
Claim 2
Dependent Claim
82 words
IN A PISTON CONSTRUCTION FOR ENGAGEMENT WITH THE CAM MEANS OF A HYDRAULIC MACHINE, THE COMBINATION OF A METAL CASING SURROUNDING A PISTON SHOE MEANS FORMED OF LOW FRICTION MATERIAL AND MOUNTED ON A BALL-SHAPED PISTON FOOT, AND SHOE MEANS INCLUDING A SIDE WALL PROVIDED WITH A RECESS, THE LOWER PORTION OF SAID METAL CASING INCLUDING AN INNER SHOULDER DISPOSED IN SAID RECESS SAID SHOE MEANS INCLUDING A BEARING SURFACE EXTENDING OUTWARDLY OF SAID METAL CASING FOR ENGAGEMENT WITH SAID CAM MEANS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |