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Patent US3228346A successfully refreshed from Google Patents.
US3228346A
Expired / Lapsed
US
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Hydraulic apparatuses
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1963-02-27
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Granted: 1966-01-11
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Expires: 1983-02-27
Abstract
No abstract record available.
Inventors
- 👤 John H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:14
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/04; F01B3/0032; F01B3/0041; F01B3/0044; F01B3/0052; F01B3/0064; F01B3/0082; F01B3/0085; F04; F04B; F04B1/00; F04B1/12; F04B1/122; F04B1/124; F04B1/20; F04B1/2007; F04B1/2014; F04B1/2035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
AN AXIAL TYPE HYDRAULIC APPARATUS COMPRISING A STATIONARY CASING WITH A VALVE BLOCK HAVING INLET AND DISCHARGE PORTS AND A SEALING SURFACE ENCOMPASSING SAID PORTS, A CYLINDER BLOCK HAVING LONGITUDINALLY EXTENDING BORES WITH PISTONS RECIPROCALLY MOUNTED THEREIN AND A SECOND SEALING SURFACE ENGAGING SAID VALVE BLOCK HAVSURFACE, FLUID PASSING ORIFICES IN SAID CYLINDER BLOCK HAVING RADIAL SURFACES FACING SAID PISTONS FOR CREATING SEALING PRESSURE, A DRIVE MEMBER ROTATABLY SUPPORTED BY SAID CASING, SAID CYLINDER BLOCK HAVING AN INNER WALL FORMING A RECESS WITH LONGITUDINALLY EXTENDING GROOVES, SAID DRIVE MEMBER HAVING AN END FITTING IN SAID RECESS WITH A SPACE IN THE END AND RADIAL HOLES EXTENDING THROUGH THE END TO SAID SPACE, BALLS IN SAID HOLES FITTING IN SAID GROOVES AND A TAPERED MEMBER MOUNTED IN SAID CYLINDER BLOCK FITTING IN SAID SPACE TO HOLD SAID BALLS IN SAID GROOVES THEREBY SUPPORTING SAID CYLINDER BLOCK ON SAID DRIVE MEMBER IN A YIELDABLE TORQUE TRANSMITTING RELATION PERMITTING SAID CYLINDER BLOCK RESPOND TO FLUID PRESSURE TO MAINTAIN THE SEALING SURFACES IN FLUID TIGHT CONTACT.
Claim 2
Dependent Claim
172 words
AN AXIAL TYPE HYDRAULIC APPARATUS COMPRISING A STATIONARY CASING WITH A VALVE BLOCK HAVING INLET AND DISCHARGE PORTS AND A SEALING SURFACE ENCOMPASSING SAID PORTS, A CYLINDER BLOCK HAVING LONGITUDINALLY EXTENDING BORES WITH PISTONS RECIPROCALLY MOUNTED THEREIN AND A SECOND SEALING SURFACE ENGAGING SAID VALVE BLOCK HAVSURFACE, FLUID PASSING ORIFICES IN SAID CYLINDER BLOCK HAVING RADIAL SURFACES FACING SAID PISTONS FOR CREATING SEALING PRESSURE, A DRIVE MEMBER ROTATABLY SUPPORTED BY SAID CASING, SAID CYLINDER BLOCK HAVING AN INNER WALL FORMING A RECESS WITH LONGITUDINALLY EXTENDING GROOVES, SAID DRIVE MEMBER HAVING AN END FITTING IN SAID RECESS WITH A SPACE IN THE END AND RADIAL HOLES EXTENDING THROUGH THE END TO SAID SPACE, BALLS IN SAID HOLES FITTING IN SAID GROOVES AND A TAPERED MEMBER MOUNTED IN SAID CYLINDER BLOCK FITTING IN SAID SPACE TO HOLD SAID BALLS IN SAID GROOVES THEREBY SUPPORTING SAID CYLINDER BLOCK ON SAID DRIVE MEMBER IN A YIELDABLE TORQUE TRANSMITTING RELATION PERMITTING SAID CYLINDER BLOCK RESPOND TO FLUID PRESSURE TO MAINTAIN THE SEALING SURFACES IN FLUID TIGHT CONTACT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |