Patent US3361487A successfully refreshed from Google Patents.
US3361487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsating brake
Assignee: Individual
•
Filing: 1966-01-03
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Granted: 1968-01-02
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Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Vriend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:01
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4208; B60T8/321; B60T8/3295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
PULSATING BRAKE APPARATUS FOR FLUID BRAKE SYSTEMS FOR VEHICLES HAVING AN OPERATOR CONTROLLED FLUID PRESSURE GENERATOR, FLUID ACTUATED WHEEL BRAKES AND A FLUID CONDUIT CONNECTION BETWEEN THE GENERATOR AND WHEEL BRAKES COMPRISING A CHECK VALVE IN THE CONDUIT CONNECTION TO PEVENT THE RETURN OF FLUID FROM THE WHEEL BRAKES TO THE GENERATOR, A NORMALLY OPEN ELECTRIC CIRCUIT, A PRESSURE SENSITIVE SWITCH IN THE CONDUIT CONNECTION BETWEEN THE CHECK VALVE AND GENERATOR RESPONSIVE AT A PREDETERMINED FLUID PRESSURE TO CLOSE THE ELECTRICAL CIRCUIT, EXHAUST PASSAGE MEANS FOR NORMALLY RELIEVING THE FLUID PRESSURE IN THE WHEEL BRAKES IN RESPONSE TO A FLUID PRESSURE DROP AT THE GENERATOR, ELECTRICALLY ACTUATED VALVE MEANS OPERABLE WHEN THE ELECTRIC CIRCUIT IS CLOSED FOR CLOSING THE EXHAST PASSAGE MEANS, ELECTRICALLY ACTUATED PULSATOR MEANS OPERABLE WHEN THE CIRCUIT IS CLOSED FOR RIGIDLY FLUCTUATING THE PRESSURE OF THE FLUID TRAPPED BEHIND THE CHECK VALVES, AND BLEEDING MEANS AT THE CHECK VALVES FOR EQUALIZING THE FLUID PRESSURE ON BOTH SIDES THEREOF, SAID BLEEDING MEANS PERMITTING ONLY MINIMAL RETURN RATE OF FLOW OF FLUID THROUGH THE CHECK VALVE SO THAT THE FLUID PRESSURE PULSATIONS IN THE CONDUIT CONNECTION ON THE WHEEL BRAKE SIDE OF THE CHECK VALVE WILL RESULT IN ONLY MINIMAL PRESSURE FLUCTUATION IN THE CONDUIT CONNECTION ON THE GENERATOR SIDE.
Claim 2
Dependent Claim
211 words
PULSATING BRAKE APPARATUS FOR FLUID BRAKE SYSTEMS FOR VEHICLES HAVING AN OPERATOR CONTROLLED FLUID PRESSURE GENERATOR, FLUID ACTUATED WHEEL BRAKES AND A FLUID CONDUIT CONNECTION BETWEEN THE GENERATOR AND WHEEL BRAKES COMPRISING A CHECK VALVE IN THE CONDUIT CONNECTION TO PEVENT THE RETURN OF FLUID FROM THE WHEEL BRAKES TO THE GENERATOR, A NORMALLY OPEN ELECTRIC CIRCUIT, A PRESSURE SENSITIVE SWITCH IN THE CONDUIT CONNECTION BETWEEN THE CHECK VALVE AND GENERATOR RESPONSIVE AT A PREDETERMINED FLUID PRESSURE TO CLOSE THE ELECTRICAL CIRCUIT, EXHAUST PASSAGE MEANS FOR NORMALLY RELIEVING THE FLUID PRESSURE IN THE WHEEL BRAKES IN RESPONSE TO A FLUID PRESSURE DROP AT THE GENERATOR, ELECTRICALLY ACTUATED VALVE MEANS OPERABLE WHEN THE ELECTRIC CIRCUIT IS CLOSED FOR CLOSING THE EXHAST PASSAGE MEANS, ELECTRICALLY ACTUATED PULSATOR MEANS OPERABLE WHEN THE CIRCUIT IS CLOSED FOR RIGIDLY FLUCTUATING THE PRESSURE OF THE FLUID TRAPPED BEHIND THE CHECK VALVES, AND BLEEDING MEANS AT THE CHECK VALVES FOR EQUALIZING THE FLUID PRESSURE ON BOTH SIDES THEREOF, SAID BLEEDING MEANS PERMITTING ONLY MINIMAL RETURN RATE OF FLOW OF FLUID THROUGH THE CHECK VALVE SO THAT THE FLUID PRESSURE PULSATIONS IN THE CONDUIT CONNECTION ON THE WHEEL BRAKE SIDE OF THE CHECK VALVE WILL RESULT IN ONLY MINIMAL PRESSURE FLUCTUATION IN THE CONDUIT CONNECTION ON THE GENERATOR SIDE.
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |