Patent US3143930A successfully refreshed from Google Patents.
US3143930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure motor mechanism
Assignee: ZF Active Safety US Inc
•
Filing: 1962-04-30
•
Granted: 1964-08-11
•
Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Jr David T Ayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:09
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/241; B60T13/242; B60T13/244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A FLUID PRESSURE MOTOR MECHANISM COMPRISING A PRESSURE RESPONSIVE UNIT HAVING A PRESSURE CHAMBER AT ONE SIDE THEREOF, A VALVE MECHANISM CONNECTED BETWEEN SAID PRESSURE CHAMBER AND A SOURCE OF PRESSURE AND OPERABLE FOR SUPPLYING FLUID PRESSURE TO SAID PRESSURE CHAMBER TO MOVE SAID PRESSURE RESPONSIVE UNIT, A PEDAL HAVING A FIRST NORMAL POSITION ENGAGING SAID VALVE MECHANISM AND MOVABLE FROM SUCH POSITION TO OPERATE SAID VALVE MECHANISM, PEDAL CONTROL MEANS INCLUDING FORCE GENERATING MEANS OPERABLE FOR MOVING SAID PEDAL TO A SECOND NORMAL POSITION DISENGAGED FROM SAID VALVE MECHANISM AND FOR MECHANICALLY CONNECTING SAID PEDAL TO SAID PRESSURE RESPONSIVE UNIT, SAID FORCE GENERATING MEANS INCLUDING MOVABLE MEANS HAVING A SURFACE EXPOSED TO PRESSURE IN SAID SOURCE TO NORMALLY MAINTAIN SAID FORCE GENERATING MEANS INOPERATIVE, AND MEANS EXPOSED TO PRESSURE IN SAID SOURCE AND OPERATIVE WHEN SAID PRESSURE DROPS TO A PREDETERMINED POINT FOR EXPOSING SAID SURFACE TO ATMOSPHERIC PRESSURE.
Claim 2
Dependent Claim
150 words
A FLUID PRESSURE MOTOR MECHANISM COMPRISING A PRESSURE RESPONSIVE UNIT HAVING A PRESSURE CHAMBER AT ONE SIDE THEREOF, A VALVE MECHANISM CONNECTED BETWEEN SAID PRESSURE CHAMBER AND A SOURCE OF PRESSURE AND OPERABLE FOR SUPPLYING FLUID PRESSURE TO SAID PRESSURE CHAMBER TO MOVE SAID PRESSURE RESPONSIVE UNIT, A PEDAL HAVING A FIRST NORMAL POSITION ENGAGING SAID VALVE MECHANISM AND MOVABLE FROM SUCH POSITION TO OPERATE SAID VALVE MECHANISM, PEDAL CONTROL MEANS INCLUDING FORCE GENERATING MEANS OPERABLE FOR MOVING SAID PEDAL TO A SECOND NORMAL POSITION DISENGAGED FROM SAID VALVE MECHANISM AND FOR MECHANICALLY CONNECTING SAID PEDAL TO SAID PRESSURE RESPONSIVE UNIT, SAID FORCE GENERATING MEANS INCLUDING MOVABLE MEANS HAVING A SURFACE EXPOSED TO PRESSURE IN SAID SOURCE TO NORMALLY MAINTAIN SAID FORCE GENERATING MEANS INOPERATIVE, AND MEANS EXPOSED TO PRESSURE IN SAID SOURCE AND OPERATIVE WHEN SAID PRESSURE DROPS TO A PREDETERMINED POINT FOR EXPOSING SAID SURFACE TO ATMOSPHERIC PRESSURE.
References Cited (Backward Citations)
US2755891A
Cited
US2706020A
Cited
US2923278A
Cited
US2910147A
Cited
US2959011A
Cited
US2853975A
Cited
US2980066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |