US3306677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle anti-skid braking system
Assignee: Dunlop Rubber Co Ltd
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Filing: 1966-04-28
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Granted: 1967-02-28
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Expires: 1986-04-28
Abstract
No abstract record available.
Inventors
- 👤 Dewar Douglas
- 👤 Davis John Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:09
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/44; B60T8/443; B60T8/42; B60T8/4208; B60T8/4225; B60T8/4241; B60T8/50; B60T8/5018; B60T8/5025; B60T8/5037; B60T8/5043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
A VEHICLE BRAKING SYSTEM COMPRISING A HYDRAULIC BRAKE OPERATING MECHANISM ASSOCIATED WITH THE BRAKE OF AT LEAST ONE WHEEL OF THE VEHICLE AND CONNECTED TO A SOURCE OF HYDRAULIC PRESSURE, A CUT-OFF VALVE FOR INTERRUPTING THE CONNECTION BETWEEN THE SOURCE OF HYDRAULIC PRESSURE AND THE BRAKE OPERATING MECHANISM, A PLUNGER MOVABLE IN A CYLINDER CONNECTED TO THE BRAKE OPERATING MECHANISM AND ARRANGED TO CONTROL THE HYDRAULIC PRESSURE THEREIN AFTER THE CUT-OFF VALVE HAS INTERRUPTED THE CONNECTION BETWEEN THE SOURCE OF HYDRAULIC PRESSURE AND THE BRAKE OPERATING MECHANISM, MEANS FOR CONTROLLING THE POSITION OF THE PLUNGER COMPRISING A PNEUMATICALLY OPERATED SERVO DEVICE ARRANGED TO APPLY A THRUST TO THE PLUNGER, A SKIDSENSING DEVICE ASSOCIATED WITH THE VEHICLE WHEEL AND ARRANGED TO CHANGE THE AIR PRESSURE IN THE SERVO DEVICE SO AS TO CAUSE A REDUCTION IN THE THRUST EXERTED ON THE PLUNGER BY THE SERVO DEVICE AND THEREBY TO RELEASE THE BRAKE WHENEVER THE WHEEL TENDS TO LOCK AND TO CHANGE THE AIR PRESSURE IN THE SERVO DEVICE SO AS TO CAUSE AN INCREASE IN THE THRUST EXERTED ON THE PLUNGER BY THE SERVO DEVICE AND THEREBY TO EFFECT RE-APPLICATION OF THE BRAKE WHEN THE
Claim 2
Dependent Claim
194 words
A VEHICLE BRAKING SYSTEM COMPRISING A HYDRAULIC BRAKE OPERATING MECHANISM ASSOCIATED WITH THE BRAKE OF AT LEAST ONE WHEEL OF THE VEHICLE AND CONNECTED TO A SOURCE OF HYDRAULIC PRESSURE, A CUT-OFF VALVE FOR INTERRUPTING THE CONNECTION BETWEEN THE SOURCE OF HYDRAULIC PRESSURE AND THE BRAKE OPERATING MECHANISM, A PLUNGER MOVABLE IN A CYLINDER CONNECTED TO THE BRAKE OPERATING MECHANISM AND ARRANGED TO CONTROL THE HYDRAULIC PRESSURE THEREIN AFTER THE CUT-OFF VALVE HAS INTERRUPTED THE CONNECTION BETWEEN THE SOURCE OF HYDRAULIC PRESSURE AND THE BRAKE OPERATING MECHANISM, MEANS FOR CONTROLLING THE POSITION OF THE PLUNGER COMPRISING A PNEUMATICALLY OPERATED SERVO DEVICE ARRANGED TO APPLY A THRUST TO THE PLUNGER, A SKIDSENSING DEVICE ASSOCIATED WITH THE VEHICLE WHEEL AND ARRANGED TO CHANGE THE AIR PRESSURE IN THE SERVO DEVICE SO AS TO CAUSE A REDUCTION IN THE THRUST EXERTED ON THE PLUNGER BY THE SERVO DEVICE AND THEREBY TO RELEASE THE BRAKE WHENEVER THE WHEEL TENDS TO LOCK AND TO CHANGE THE AIR PRESSURE IN THE SERVO DEVICE SO AS TO CAUSE AN INCREASE IN THE THRUST EXERTED ON THE PLUNGER BY THE SERVO DEVICE AND THEREBY TO EFFECT RE-APPLICATION OF THE BRAKE WHEN THE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |