Patent US3923946A successfully refreshed from Google Patents.
Patent US3237997A successfully refreshed from Google Patents.
US3237997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking systems for vehicles
Assignee: Individual
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Filing: 1964-02-20
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Granted: 1966-03-01
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Expires: 1984-02-20
Abstract
No abstract record available.
Inventors
- 👤 Howard J Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:38
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1837; B60T8/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A FLUID PRESSURE BRAKING SYSTEM FOR WHEELED VEHICLES HAVING A BRAKING MEANS ADJACENT EACH WHEEL OF THE VEHICLE COMPRISING IN COMBINATION, A BRAKING PRESSURE GENERATING MEMBER REMOTE FROM SAID BRAKING MEANS; A CONTROL UNIT INCLUING A CHAMBER HAVING THREE SPACED PASSAGES THROUGH THE WALL THEREOF; FIRST FLUID CONDUIT MEANS COMMUNICATING AT ONE OF ITS ENDS WITH SAID CHAMBER BY MEANS OF ONE OF SAID PASSAGE AND COMMUNICATING AT ITS OTHER END WITH SAID BRAKING PRESSURE GENERATING MEMBER; SECOND FLUID CONDUIT MEANS COMMUNICATING AT ONE OF ITS ENDS WITH SAID CHAMBER BY MEANS OF A SECOND OF SAID PASSAGES AND COMMUNICATING AT ITS OTHER END WITH SAID BRAKING MEANS; AND A THRUST MEMBER HAVING A FIRST END MOVABLY MOUNTED IN SAID CHAMBER BY MEANS OF THE THIRD OF SAID PASSAGES SAID HAVING A SECOND END CONNECTED TO THE VEHICLE ON WHICH SAID WHEEL IS MOUNTED WHEREBY THE MAXIMUM BRAKING FORCE THAT MAY BE TRANSMITTED FROM SAID BRKAING PRESSURE GENERATING MEMBER TO SAID BRAKING MEANS IS LIMITED BY SAID CONTROL UNIT AND IS INCREASED OR DECREASED IN ACCORDANCE WITH THE POSITION OF SAID FIRST END OF SAID THRUST MEMBER IN SAID CHAMBER WITHOUT CHANGE IN BRAKING PRESSURE OUTPUT OF SAID BRAKING PRESSURE GENERATING MEMBER.
Claim 2
Dependent Claim
202 words
A FLUID PRESSURE BRAKING SYSTEM FOR WHEELED VEHICLES HAVING A BRAKING MEANS ADJACENT EACH WHEEL OF THE VEHICLE COMPRISING IN COMBINATION, A BRAKING PRESSURE GENERATING MEMBER REMOTE FROM SAID BRAKING MEANS; A CONTROL UNIT INCLUING A CHAMBER HAVING THREE SPACED PASSAGES THROUGH THE WALL THEREOF; FIRST FLUID CONDUIT MEANS COMMUNICATING AT ONE OF ITS ENDS WITH SAID CHAMBER BY MEANS OF ONE OF SAID PASSAGE AND COMMUNICATING AT ITS OTHER END WITH SAID BRAKING PRESSURE GENERATING MEMBER; SECOND FLUID CONDUIT MEANS COMMUNICATING AT ONE OF ITS ENDS WITH SAID CHAMBER BY MEANS OF A SECOND OF SAID PASSAGES AND COMMUNICATING AT ITS OTHER END WITH SAID BRAKING MEANS; AND A THRUST MEMBER HAVING A FIRST END MOVABLY MOUNTED IN SAID CHAMBER BY MEANS OF THE THIRD OF SAID PASSAGES SAID HAVING A SECOND END CONNECTED TO THE VEHICLE ON WHICH SAID WHEEL IS MOUNTED WHEREBY THE MAXIMUM BRAKING FORCE THAT MAY BE TRANSMITTED FROM SAID BRKAING PRESSURE GENERATING MEMBER TO SAID BRAKING MEANS IS LIMITED BY SAID CONTROL UNIT AND IS INCREASED OR DECREASED IN ACCORDANCE WITH THE POSITION OF SAID FIRST END OF SAID THRUST MEMBER IN SAID CHAMBER WITHOUT CHANGE IN BRAKING PRESSURE OUTPUT OF SAID BRAKING PRESSURE GENERATING MEMBER.
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 |