Patent US3230893A successfully refreshed from Google Patents.
US3230893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swashplate pump
Assignee: Sundstrand Corp
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Filing: 1961-05-31
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Granted: 1966-01-25
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Hann
- 👤 Jr Harry C Moon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:52
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/26; F04B1/30; F04B1/32; F04B1/324; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18024; Y10T74/18056; Y10T74/18296; Y10T74/18336
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SWASHPLATE PUMP COMPRISING: A CYLINDER BLOCK ROTATABLE ABOUT AN AXIS AND HAVING CYLINDERS AXIALLY DISPOSED ABOUT SAID AXIS; A SWASHPLATE ASSEMBLY PIVOTAL ABOUT AN AXIS TRANSVERSE TO THE CYLINDER BLOCK AXIS; PISTONS RECIPROCAL ONE IN EACH OF SAID CYLINDERS AND PIVOTALLY CONNECTED TO SAID SWASHPLATE ASSEMBLY, AND SAID SWASHPLATE AXIS BEING SPACED AXIALLY TOWARD THE CYLINDER BLOCK WITH RESPECT TO THE PLANE OF THE PISTON PIVOTAL CONNECTIONS A DISTANCE TO BALANCE THE HYDRAULIC FLUID PRESSURE MOMENT FROM FLUID IN SAID CYLINDERS ACTING THROUGH SAID PISTONS ABOUT THE SWASHPLATE PIVOT AXIS TO CORRECT FOR THE IMBALANCE IN THE FLUID PRESSURE MOMENT ABOUT AN AXIS NORMAL TO AND INTERSECTING THE CYLINDER BLOCK AXIS IN THE PLANE OF THE PISTON PIVOTAL CONNECTIONS.
Claim 2
Dependent Claim
120 words
A SWASHPLATE PUMP COMPRISING: A CYLINDER BLOCK ROTATABLE ABOUT AN AXIS AND HAVING CYLINDERS AXIALLY DISPOSED ABOUT SAID AXIS; A SWASHPLATE ASSEMBLY PIVOTAL ABOUT AN AXIS TRANSVERSE TO THE CYLINDER BLOCK AXIS; PISTONS RECIPROCAL ONE IN EACH OF SAID CYLINDERS AND PIVOTALLY CONNECTED TO SAID SWASHPLATE ASSEMBLY, AND SAID SWASHPLATE AXIS BEING SPACED AXIALLY TOWARD THE CYLINDER BLOCK WITH RESPECT TO THE PLANE OF THE PISTON PIVOTAL CONNECTIONS A DISTANCE TO BALANCE THE HYDRAULIC FLUID PRESSURE MOMENT FROM FLUID IN SAID CYLINDERS ACTING THROUGH SAID PISTONS ABOUT THE SWASHPLATE PIVOT AXIS TO CORRECT FOR THE IMBALANCE IN THE FLUID PRESSURE MOMENT ABOUT AN AXIS NORMAL TO AND INTERSECTING THE CYLINDER BLOCK AXIS IN THE PLANE OF THE PISTON PIVOTAL CONNECTIONS.
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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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |