Patent USRE31201E successfully refreshed from Google Patents.
Patent US3229467A successfully refreshed from Google Patents.
US3229467A
Expired / Lapsed
US
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Hydraulic brakes having a safety device
Assignee: Valeo SE
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Filing: 1964-02-27
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Granted: 1966-01-18
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Expires: 1984-02-27
Abstract
No abstract record available.
Inventors
- 👤 Lepelletier Pierre And Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:29
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/24; B60T11/16; B60T11/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
HYDRAULIC BRAKES HAVING A SAFETY DEVICE, COMPRISING TWO BRAKES, A PRIMARY CONDUIT IN COMMUNICATION WITH EACH OF SAID BRAKES, A MASTER CYLINDER FOR DELIVERING FLUID TO SAID PRIMARY CONDUITS, A SECONDARY FLUID CIRCUIT FOR BALANCING THE REACTIONS OF SAID TWO BRAKES, AND PRESSURE-COUPLING MEANS RESPONSIVE TO THE FLUID PRESSURE IN SAID SECONDARY CIRCUIT TO RENDER THE PRESSURES OF THE FLUID IN THE PRIMARY CONDUITS INDEPENDENT OF EACH OTHER WHEN SAID SECONDARY FLUID PRESSURE IS SUFFICIENTLY HIGH AND TO RENDER SAID PRIMARY FLUID PRESSURES SUBSTANTIALLY EQUAL TO EACH OTHER WHEN SAID SECOND FLUID PRESSURE IS SUFFICIENTLY LOW, SAID PRESSURE-COUPLING MEANS COMPRISING A ROD, A PAIR OF SPACED PISTONS ON THE ROD, A FIRST CHAMBER COMMUNICATING WITH ONE OF SAID PRIMARY CONDUITS, ONE OF SAID PISTONS BEING SLIDABLY DISPOSED IN SAID FIRST CHAMBER, A SECOND CHAMBER COMMUNICATING WITH THE OTHER OF SAID
Claim 2
Dependent Claim
140 words
HYDRAULIC BRAKES HAVING A SAFETY DEVICE, COMPRISING TWO BRAKES, A PRIMARY CONDUIT IN COMMUNICATION WITH EACH OF SAID BRAKES, A MASTER CYLINDER FOR DELIVERING FLUID TO SAID PRIMARY CONDUITS, A SECONDARY FLUID CIRCUIT FOR BALANCING THE REACTIONS OF SAID TWO BRAKES, AND PRESSURE-COUPLING MEANS RESPONSIVE TO THE FLUID PRESSURE IN SAID SECONDARY CIRCUIT TO RENDER THE PRESSURES OF THE FLUID IN THE PRIMARY CONDUITS INDEPENDENT OF EACH OTHER WHEN SAID SECONDARY FLUID PRESSURE IS SUFFICIENTLY HIGH AND TO RENDER SAID PRIMARY FLUID PRESSURES SUBSTANTIALLY EQUAL TO EACH OTHER WHEN SAID SECOND FLUID PRESSURE IS SUFFICIENTLY LOW, SAID PRESSURE-COUPLING MEANS COMPRISING A ROD, A PAIR OF SPACED PISTONS ON THE ROD, A FIRST CHAMBER COMMUNICATING WITH ONE OF SAID PRIMARY CONDUITS, ONE OF SAID PISTONS BEING SLIDABLY DISPOSED IN SAID FIRST CHAMBER, A SECOND CHAMBER COMMUNICATING WITH THE OTHER OF SAID
References Cited (Backward Citations)
US3044581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |