Patent US3211500A successfully refreshed from Google Patents.
US3211500A
Expired / Lapsed
US
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Booster-assisted hydraulic braking systems
Assignee: Girling Ltd
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Filing: 1964-03-06
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Granted: 1965-10-12
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Expires: 1984-03-06
Abstract
No abstract record available.
Inventors
- 👤 Lawson Thomas Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:07
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/241; B60T13/242; B60T13/245; B60T8/00; B60T8/18; B60T8/1812; B60T8/1818
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A BRAKING SYSTEM FOR VEHICLES COMPRISING A PEDALOPERATED MASTER CYLINDER, AN AUXILIARY CYLINDER AND PISTON ASSEMBLY CONNECTED TO WHEEL BRAKE CYLINDERS AND RECEIVING LIQUID FROM THE MASTER CYLINDER, A FLUID-PRESSURE BOOSTER ADAPTED TO ACT ON THE PISTON OF THE AUXILIARY CYLINDER TO INCREASE THE EFFORT APPLIED TO SAID PISTON BY THE MASTER CYLINDER PRESSURE, A VALVE CONTROLLING THE ENERGISTATION OF THE BOOSTER, MEANS ACTUATED BY THE MASTER CYLINDER PRESSURE FOR ACTUATING THE CONTROL VALVE, AND MEANS SENSTIVE TO LOADING OF A BRAKED WHEEL INTERPOSED BETWEEN SAID MEANS ACTUATED BY THE MASTER CYLINDER AND THE CONTROL VALVE WHEREBY THE EFFORT PROVIDED BY THE BOOSTER IS AUTOMATICALLY ADJUSTED IN ACCORDANCE WITH THE WHEEL LOADING.
Claim 2
Dependent Claim
112 words
A BRAKING SYSTEM FOR VEHICLES COMPRISING A PEDALOPERATED MASTER CYLINDER, AN AUXILIARY CYLINDER AND PISTON ASSEMBLY CONNECTED TO WHEEL BRAKE CYLINDERS AND RECEIVING LIQUID FROM THE MASTER CYLINDER, A FLUID-PRESSURE BOOSTER ADAPTED TO ACT ON THE PISTON OF THE AUXILIARY CYLINDER TO INCREASE THE EFFORT APPLIED TO SAID PISTON BY THE MASTER CYLINDER PRESSURE, A VALVE CONTROLLING THE ENERGISTATION OF THE BOOSTER, MEANS ACTUATED BY THE MASTER CYLINDER PRESSURE FOR ACTUATING THE CONTROL VALVE, AND MEANS SENSTIVE TO LOADING OF A BRAKED WHEEL INTERPOSED BETWEEN SAID MEANS ACTUATED BY THE MASTER CYLINDER AND THE CONTROL VALVE WHEREBY THE EFFORT PROVIDED BY THE BOOSTER IS AUTOMATICALLY ADJUSTED IN ACCORDANCE WITH THE WHEEL LOADING.
References Cited (Backward Citations)
US2407870A
Cited
US3114241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |