Patent US3139038A successfully refreshed from Google Patents.
US3139038A
Expired / Lapsed
US
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Engine
Assignee: Enerpac Tool Group Corp
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Filing: 1961-07-17
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Granted: 1964-06-30
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 Phillip G Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:35
CPC Classifications
F; F03; F03C; F03C1/00; F03C1/02; F03C1/06; F03C1/0636; F03C1/0644; F03C1/0663; F03C1/0665; F01; F01B; F01B3/00; F01B3/0082; F01B3/0085; F01B3/0088; F03C1/0602; F03C1/0605; F03C1/0652; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18336
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A FLUID PRESSURE ENGINE INCLUDING A ROTATABLE CYLINDER BARREL HAVING AN AXIAL CHAMBER THERETHROUGH DEFINED BY A CYLINDRICAL WALL, A PLURALITY OF PISTONS IN SAID BARREL FOR ROTATION THEREWITH AND EACH PISTON HAVING A TILTABLE SLIPPER ATTACHED TO ONE END OF A NON-ROTATABLE SWASH PLATE HAVING AN INCLINED SURFACE AGAINST WHICH SAID SLIPPERS ARE ADAPTED TO SLIDE AND FOR CAUSING RECIPROCATION OF SAID PISTONS AS THEY ROTATE WITH SAID BARREL, A KEEPER RING IN WHICH SAID SLIPPERS ARE MOUNTED, A DRIVE SHAFT EXTENDING THROUGH THE LENGTH OF SAID CHAMBER, A SLEEVE HAVING AN OUTER SURFACE OF A FIRST END SPLINED TO SAID WALL AND THE INNER SURFACE OF ITS SECOND END SPLINED TO SAID SHAFT CAUSING SAID SHAFT AND BARREL TO ROTATE AS A UNIT BUT PERMITTING RELATIVE SLIDABLE MOVEMENT BETWEEN SAID BARREL AND SAID SHAFT LONGITUDINALLY OF SAID SHAFT, SAID SLEEVE HAVING A PORTION ADJACENT SAID SECOND END ON WHICH SAID RING IS TILTABLY MOUNTED, AND RESILIENT MEANS BIASING SAID SLEEVE AND SAID RING TOWARD SAID SWASH PLATE FOR CAUSING SAID SLIPPERS TO ENGAGE SAID SURFACE.
Claim 2
Dependent Claim
177 words
A FLUID PRESSURE ENGINE INCLUDING A ROTATABLE CYLINDER BARREL HAVING AN AXIAL CHAMBER THERETHROUGH DEFINED BY A CYLINDRICAL WALL, A PLURALITY OF PISTONS IN SAID BARREL FOR ROTATION THEREWITH AND EACH PISTON HAVING A TILTABLE SLIPPER ATTACHED TO ONE END OF A NON-ROTATABLE SWASH PLATE HAVING AN INCLINED SURFACE AGAINST WHICH SAID SLIPPERS ARE ADAPTED TO SLIDE AND FOR CAUSING RECIPROCATION OF SAID PISTONS AS THEY ROTATE WITH SAID BARREL, A KEEPER RING IN WHICH SAID SLIPPERS ARE MOUNTED, A DRIVE SHAFT EXTENDING THROUGH THE LENGTH OF SAID CHAMBER, A SLEEVE HAVING AN OUTER SURFACE OF A FIRST END SPLINED TO SAID WALL AND THE INNER SURFACE OF ITS SECOND END SPLINED TO SAID SHAFT CAUSING SAID SHAFT AND BARREL TO ROTATE AS A UNIT BUT PERMITTING RELATIVE SLIDABLE MOVEMENT BETWEEN SAID BARREL AND SAID SHAFT LONGITUDINALLY OF SAID SHAFT, SAID SLEEVE HAVING A PORTION ADJACENT SAID SECOND END ON WHICH SAID RING IS TILTABLY MOUNTED, AND RESILIENT MEANS BIASING SAID SLEEVE AND SAID RING TOWARD SAID SWASH PLATE FOR CAUSING SAID SLIPPERS TO ENGAGE SAID SURFACE.
References Cited (Backward Citations)
US2776628A
Cited
US2776629A
Cited
US2817954A
Cited
FR1169262A
Cited
US2953099A
Cited
FR1224344A
Cited
GB855582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |