US3186174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic master cylinder
Assignee: Holley Performance Products Inc
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Filing: 1963-04-30
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Granted: 1965-06-01
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Expires: 1983-04-30
Abstract
No abstract record available.
Inventors
- 👤 Dennis J Hayman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; B60T11/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A HYDRAULIC VEHICLE BRAKING SYSTEM HAVING A FOOT PEDAL, AN ACUTATING ROD, A FLUID RESERVOIR, AND A LINE LEADING TO A WHEEL CYLINDER, A TWO-STAGE MASTER CYLINDER, SAID CYLINDER COMPRISING A LOW PRESSURE CHAMBER, A HIGH PRESSURE CHAMBER, FIRST VALVE MEANS FOR MOVING THE LARGER VOLUME OF FLUID FROM SAID LOW PRESSURE CHAMBER, SECOND VALVE MEANS FOR LIMITING THE PRESSURE IN SAID LINE AND FOR LIMITING THE MOVEMENT OF SAID FOOT PEDAL, AND MEANS ASSOCIATED WITH SAID LOW PRESSURE CHAMBER FOR RECEIVING THE FLUID DISPLACED FROM SAID LOW PRESSURE CHAMBER AFTER SAID FIRST VALVE MEANS CLOSES.
Claim 2
Dependent Claim
97 words
IN A HYDRAULIC VEHICLE BRAKING SYSTEM HAVING A FOOT PEDAL, AN ACUTATING ROD, A FLUID RESERVOIR, AND A LINE LEADING TO A WHEEL CYLINDER, A TWO-STAGE MASTER CYLINDER, SAID CYLINDER COMPRISING A LOW PRESSURE CHAMBER, A HIGH PRESSURE CHAMBER, FIRST VALVE MEANS FOR MOVING THE LARGER VOLUME OF FLUID FROM SAID LOW PRESSURE CHAMBER, SECOND VALVE MEANS FOR LIMITING THE PRESSURE IN SAID LINE AND FOR LIMITING THE MOVEMENT OF SAID FOOT PEDAL, AND MEANS ASSOCIATED WITH SAID LOW PRESSURE CHAMBER FOR RECEIVING THE FLUID DISPLACED FROM SAID LOW PRESSURE CHAMBER AFTER SAID FIRST VALVE MEANS CLOSES.
References Cited (Backward Citations)
US2666294A
Cited
US3010283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |