US3194019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Master cylinder for hydraulic brakes
Assignee: Valeo SE
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Filing: 1964-03-18
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Granted: 1965-07-13
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Expires: 1984-03-18
Abstract
No abstract record available.
Inventors
- 👤 Lepelletier Pierre And Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:22
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/22; B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; B60T11/20; B60T11/22; B60T11/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A MASTER CYLINDER FOR HYDRAULIC BRAKES OF THE KIND COMPRISING A PISTON UNIT WHICH FORMS ON THE ONE HAND TWO PRIMARY CHAMBERS WHICH DRIVE EQUAL OR PROPORTIONAL VOLUMES INTO TWO PRIMARY CONDUITS LEADING RESPECTIVELY TO TWO BRAKES, WHEN THE PISTON UNIT IS DEPRESSED IN THE ACTION OF BRAKING, AND ON THE OTHER HAND A SECONDARY CHAMBER WHICH IS CONNECTED TO A SECONDARY CIRCUIT BALANCING THE REACTIONS OF SAID TWO BRAKES, SAID SECONDARY CHAMBER BEING REDUCED IN VOLUME BY THE DEPRESSION OF SAID PISTON UNIT, AND FURTHER COMPRISING MEANS FOR SELECTIVELY CONTROLLING THE PRESSURE IN THE SECONDARY CHAMBER OF SAID MASTER CYLINDER IN ORDER TO AVOID AN EXCESSIVE EFFORT IN THE OPERATION OF DEPRESSION OF SAID PISTON UNIT.
Claim 2
Dependent Claim
117 words
A MASTER CYLINDER FOR HYDRAULIC BRAKES OF THE KIND COMPRISING A PISTON UNIT WHICH FORMS ON THE ONE HAND TWO PRIMARY CHAMBERS WHICH DRIVE EQUAL OR PROPORTIONAL VOLUMES INTO TWO PRIMARY CONDUITS LEADING RESPECTIVELY TO TWO BRAKES, WHEN THE PISTON UNIT IS DEPRESSED IN THE ACTION OF BRAKING, AND ON THE OTHER HAND A SECONDARY CHAMBER WHICH IS CONNECTED TO A SECONDARY CIRCUIT BALANCING THE REACTIONS OF SAID TWO BRAKES, SAID SECONDARY CHAMBER BEING REDUCED IN VOLUME BY THE DEPRESSION OF SAID PISTON UNIT, AND FURTHER COMPRISING MEANS FOR SELECTIVELY CONTROLLING THE PRESSURE IN THE SECONDARY CHAMBER OF SAID MASTER CYLINDER IN ORDER TO AVOID AN EXCESSIVE EFFORT IN THE OPERATION OF DEPRESSION OF SAID PISTON UNIT.
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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |