Patent US3143860A successfully refreshed from Google Patents.
US3143860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Divided output master cylinder
Assignee: ZF Active Safety US Inc
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Filing: 1962-05-07
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Granted: 1964-08-11
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Expires: 1982-05-07
Abstract
No abstract record available.
Inventors
- 👤 Stelzer William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:30
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/26; B60T11/00; B60T11/10; B60T11/16; B60T11/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
IN A BRAKING SYSTEM FOR A MOTOR VEHICLE HAVING DIFFERENT SETS OF WHEEL CYLINDERS, A FLUID PRESSURE GENERATING DEVICE COMPRISING A PLURALITY OF PRESSURE CHAMBERS A FIRST OF WHICH IS CONNECTED TO ONE SET OF WHEEL CYLINDERS AND THE OTHERS OF WHICH ARE CONNECTED TO THE REMAINING WHEEL CYLINDERS, SAID OTHER CHAMBERS INCLUDING A CHAMBER SUBSTANTIALLY SMALLER THAN SAID FIRST CHAMBER, MOVABLE MEMBERS FOR GENERATING PRESSURES IN THE RESPECTIVE CHAMBERS TO DISPLACE FLUID INTO SAID SETS OF WHEEL CYLINDERS, MEANS FOR APPLYING A FORCE TO ONE OF SAID MOVABLE MEMBERS TO ACTUATE IT, FLUID IN THE SYSTEM TRANSMITTING SUCH FORCE BETWEEN ALL OF SAID MOVABLE MEMBERS TO SIMULTANEOUSLY ACTUATE ALL OF SUCH MEMBERS UPON ACTUATION OF SAID ONE MOVABLE MEMBER, AND MEANS RESPONSIVE TO THE BUILDING UP OF PRESSURE TO A PREDETERMINED POINT IN SAID OTHER WHEEL CYLINDERS FOR DISCONNECTING ALL BUT SAID SMALL CHAMBER FROM SAID REMAINING WHEEL CYLINDERS WHEREBY OPERATION
Claim 2
Dependent Claim
152 words
IN A BRAKING SYSTEM FOR A MOTOR VEHICLE HAVING DIFFERENT SETS OF WHEEL CYLINDERS, A FLUID PRESSURE GENERATING DEVICE COMPRISING A PLURALITY OF PRESSURE CHAMBERS A FIRST OF WHICH IS CONNECTED TO ONE SET OF WHEEL CYLINDERS AND THE OTHERS OF WHICH ARE CONNECTED TO THE REMAINING WHEEL CYLINDERS, SAID OTHER CHAMBERS INCLUDING A CHAMBER SUBSTANTIALLY SMALLER THAN SAID FIRST CHAMBER, MOVABLE MEMBERS FOR GENERATING PRESSURES IN THE RESPECTIVE CHAMBERS TO DISPLACE FLUID INTO SAID SETS OF WHEEL CYLINDERS, MEANS FOR APPLYING A FORCE TO ONE OF SAID MOVABLE MEMBERS TO ACTUATE IT, FLUID IN THE SYSTEM TRANSMITTING SUCH FORCE BETWEEN ALL OF SAID MOVABLE MEMBERS TO SIMULTANEOUSLY ACTUATE ALL OF SUCH MEMBERS UPON ACTUATION OF SAID ONE MOVABLE MEMBER, AND MEANS RESPONSIVE TO THE BUILDING UP OF PRESSURE TO A PREDETERMINED POINT IN SAID OTHER WHEEL CYLINDERS FOR DISCONNECTING ALL BUT SAID SMALL CHAMBER FROM SAID REMAINING WHEEL CYLINDERS WHEREBY OPERATION
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) | 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 |