Patent US3143926A successfully refreshed from Google Patents.
US3143926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Booster brake mechanism
Assignee: ZF Active Safety US Inc
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Filing: 1960-10-07
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Granted: 1964-08-11
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Expires: 1980-10-07
Abstract
No abstract record available.
Inventors
- 👤 Stelzer William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:56
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; B60T13/573; B60T13/575
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A FLUID PRESSURE MOTOR MECHANISM COMPRISING A CASING, A PRESSURE RESPONSIVE UNIT FORMING THEREWITH A VARIABLE PRESSURE CHAMBER, A VALVE MECHANISM, COMPRISING A MANUALLY OPERABLE MEMBER, MOVABLE UPON INITIAL MOVEMENT OF SAID MANUALLY OPERABLE MEMBER FROM A NORMAL OFF POSITION TO CONNECT SAID VARIABLE PRESSURE CHAMBER TO A SOURCE OF PRESSURE TO OPERATE SAID PRESSURE RESPONSIVE UNIT, A PUSH ROD PROJECTING FROM SAID PRESSURE RESPONSIVE UNIT AND FORMING A MEMBER TO BE OPERATED, A SPRING SURROUNDING SAID ROD AND ENGAGING AT OPPOSITE ENDS AGAINST SAID ROD AND SAID PRESSURE RESPONSIVE UNIT AND FORMING MEANS FOR TRANSMITTING FORCES FROM SAID PRESSURE RESPONSIVE UNIT TO SAID ROD WHEN RESISTANCE TO MOVEMENT OF SAID ROD IS BELOW A PREDETERMINED POINT, SAID SPRING BEING YIELDABLE WHEN SAID RESISTANCE INCREASES ABOVE SAID PREDETERMINED POINT, SAID ROD BEING AXIALLY MOVABLE RELATIVE TO SAID
Claim 2
Dependent Claim
137 words
A FLUID PRESSURE MOTOR MECHANISM COMPRISING A CASING, A PRESSURE RESPONSIVE UNIT FORMING THEREWITH A VARIABLE PRESSURE CHAMBER, A VALVE MECHANISM, COMPRISING A MANUALLY OPERABLE MEMBER, MOVABLE UPON INITIAL MOVEMENT OF SAID MANUALLY OPERABLE MEMBER FROM A NORMAL OFF POSITION TO CONNECT SAID VARIABLE PRESSURE CHAMBER TO A SOURCE OF PRESSURE TO OPERATE SAID PRESSURE RESPONSIVE UNIT, A PUSH ROD PROJECTING FROM SAID PRESSURE RESPONSIVE UNIT AND FORMING A MEMBER TO BE OPERATED, A SPRING SURROUNDING SAID ROD AND ENGAGING AT OPPOSITE ENDS AGAINST SAID ROD AND SAID PRESSURE RESPONSIVE UNIT AND FORMING MEANS FOR TRANSMITTING FORCES FROM SAID PRESSURE RESPONSIVE UNIT TO SAID ROD WHEN RESISTANCE TO MOVEMENT OF SAID ROD IS BELOW A PREDETERMINED POINT, SAID SPRING BEING YIELDABLE WHEN SAID RESISTANCE INCREASES ABOVE SAID PREDETERMINED POINT, SAID ROD BEING AXIALLY MOVABLE RELATIVE TO SAID
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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) | 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 |