US3237526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring-assisted fluid pressure motor mechanism
Assignee: ZF Active Safety US Inc
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Filing: 1964-01-17
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Granted: 1966-03-01
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Expires: 1984-01-17
Abstract
No abstract record available.
Inventors
- 👤 Edward J Hayes
- 👤 Jr David T Ayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:41
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; B60T13/565; B60T13/569
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A MOTOR MECHANISM COMPRISING A CASING, A PRESSURE RESPONSIVE UNIT IN SAID CASING DIVIDING IT TO FROM A FIRST CHAMBER AND A SECOND CHAMBER, A FOLLOW-UP VALVE MECHANISM CARRIED BY SAID PRESSURE-RESPONSIVE UNIT AND HAVING A NORMAL POSITION CONNECTING SAID FIRST CHAMBER TO A RELATIVELY HIGH PRESSURE SOURCE AND CONNECTING SAID SECOND CHAMBER TO A RELATIVELY LOW PRESSURE SOURCE AND BEING OPERATIVE FOR CONNECTING SAID FIRST CHAMBER TO SAID LOW PRESSURE SOURCE AND SAID SECOND CHAMBER TO SAID HIGH PRESSURE SOURCE TO OPERATE SAID PRESSURE RESPONSIVE UNIT, AND A SPRING IN SAID SECOND CHAMBER NORMALLY OVERCOME BY RELATIVELY HIGH PRESSURE IN SAID FIRST CHAMBER, AND ASSISTING RELATIVELY HIGH PRESSURE IN SAID SECOND CHAMBER IN APPLYING FORCE TO SAID PRESSURE RESPOSIVE UNIT WHEN SAID VALVE MECHANISM IS OPERATED.
Claim 2
Dependent Claim
127 words
A MOTOR MECHANISM COMPRISING A CASING, A PRESSURE RESPONSIVE UNIT IN SAID CASING DIVIDING IT TO FROM A FIRST CHAMBER AND A SECOND CHAMBER, A FOLLOW-UP VALVE MECHANISM CARRIED BY SAID PRESSURE-RESPONSIVE UNIT AND HAVING A NORMAL POSITION CONNECTING SAID FIRST CHAMBER TO A RELATIVELY HIGH PRESSURE SOURCE AND CONNECTING SAID SECOND CHAMBER TO A RELATIVELY LOW PRESSURE SOURCE AND BEING OPERATIVE FOR CONNECTING SAID FIRST CHAMBER TO SAID LOW PRESSURE SOURCE AND SAID SECOND CHAMBER TO SAID HIGH PRESSURE SOURCE TO OPERATE SAID PRESSURE RESPONSIVE UNIT, AND A SPRING IN SAID SECOND CHAMBER NORMALLY OVERCOME BY RELATIVELY HIGH PRESSURE IN SAID FIRST CHAMBER, AND ASSISTING RELATIVELY HIGH PRESSURE IN SAID SECOND CHAMBER IN APPLYING FORCE TO SAID PRESSURE RESPOSIVE UNIT WHEN SAID VALVE MECHANISM IS OPERATED.
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |