US3107632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for hydraulic device
Assignee: Individual
•
Filing: 1960-07-05
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Granted: 1963-10-22
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Expires: 1980-07-05
Abstract
No abstract record available.
Inventors
- 👤 Gunnar A Wahlmark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:32
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/10; F01B3/103; F01B3/109; F04; F04B; F04B49/00; F04B49/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
IN A FLUID DEVICE INCLUDING A ROTATABLE SWASH MEMBER UNIVERSALLY DRIVINGLY CONNECTED WITH A ROTATABLE CYLINDER MEMBER AND HAVING A PLURALITY OF PISTONS OPERATIVELY DISPOSED BETWEEN THE MEMBERS FOR RECIPROCATION IN THE CYLINDER MEMBER A CASING CONTAINING SAID MEMBERS, MECHANISM PIVOTALLY SUPPORTING SAID MEMBERS WITH RESPECT TO ONE ANOTHER FOR CHARGING THE STROKES OF SAID PISTON, INLET AND OUTLET PORT MEANS COMMUNICATING WITH SAID CYLINDER MEMBER, A SENSING PISTON, MEANS COMMUNICATING PRESSURE FROM SAID OUTLET PORT MEANS AGAINST ONE END OF SAID SENSING PISTON URGING SAID SENSING PISTON IN ONE DIRECTION, SPRING MEANS IN SAID CASING FOR URGING SAID SENSING PISTON IN THE OPPOSITE DIRECTION, MEANS COMMUNICATING CASING PRESSURE TO THE OTHER END OF SAID SENSING PISTON, A CONTROL PISTON OPERATIVELY ASSOCIATED WITH ONE OF SAID MEMBERS FOR PIVOTING SAID MEMBER IN THE DIRECTION OF DECREASING PISTON STROKES, SAID SPRING MEANS ALSO ACTING IN OPPOSITION TO SAID CONTROL PISTON AND BIASING SAID ONE MEMBER IN THE DIRECTION OF INCREASING PISTON STROKES, A CONTROL CHAMBER COMMUNICATING WITH ONE END OF SAID CONTROL PISTON, A CONTROL PORT COMMUNICATING WITH SAID CONTROL CHAMBER, AND SAID SENSING PISTON HAVING A CONTROL PORTION CONTROLLING SAID CONTROL PORT TO METER OUTLET PRESSURE TO SAID CONTROL CHAMBER IN ACCORDANCE WITH A PREDETERMINED OUTLET PRESSURE SCHEDULE AND TO METER
Claim 2
Dependent Claim
211 words
IN A FLUID DEVICE INCLUDING A ROTATABLE SWASH MEMBER UNIVERSALLY DRIVINGLY CONNECTED WITH A ROTATABLE CYLINDER MEMBER AND HAVING A PLURALITY OF PISTONS OPERATIVELY DISPOSED BETWEEN THE MEMBERS FOR RECIPROCATION IN THE CYLINDER MEMBER A CASING CONTAINING SAID MEMBERS, MECHANISM PIVOTALLY SUPPORTING SAID MEMBERS WITH RESPECT TO ONE ANOTHER FOR CHARGING THE STROKES OF SAID PISTON, INLET AND OUTLET PORT MEANS COMMUNICATING WITH SAID CYLINDER MEMBER, A SENSING PISTON, MEANS COMMUNICATING PRESSURE FROM SAID OUTLET PORT MEANS AGAINST ONE END OF SAID SENSING PISTON URGING SAID SENSING PISTON IN ONE DIRECTION, SPRING MEANS IN SAID CASING FOR URGING SAID SENSING PISTON IN THE OPPOSITE DIRECTION, MEANS COMMUNICATING CASING PRESSURE TO THE OTHER END OF SAID SENSING PISTON, A CONTROL PISTON OPERATIVELY ASSOCIATED WITH ONE OF SAID MEMBERS FOR PIVOTING SAID MEMBER IN THE DIRECTION OF DECREASING PISTON STROKES, SAID SPRING MEANS ALSO ACTING IN OPPOSITION TO SAID CONTROL PISTON AND BIASING SAID ONE MEMBER IN THE DIRECTION OF INCREASING PISTON STROKES, A CONTROL CHAMBER COMMUNICATING WITH ONE END OF SAID CONTROL PISTON, A CONTROL PORT COMMUNICATING WITH SAID CONTROL CHAMBER, AND SAID SENSING PISTON HAVING A CONTROL PORTION CONTROLLING SAID CONTROL PORT TO METER OUTLET PRESSURE TO SAID CONTROL CHAMBER IN ACCORDANCE WITH A PREDETERMINED OUTLET PRESSURE SCHEDULE AND TO METER
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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |