US3172265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-cylinder hydraulic actuator for automotive brake systems
Assignee: Individual
•
Filing: 1963-05-27
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Granted: 1965-03-09
•
Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Glenn T Randol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:11
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; B60T11/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A FLUID PRESSURE PRODUCING ACTUATOR COMPRISING: A CHAMBER-DEFINING BODY PROVIDED WITH A TWO-COMPARTMENT FLUID SUPPLY RESERVOIR; A PAIR OF WALLED CYLINDERS ADAPTED TO RECEIVE FLUID FROM SAID TWO RESERVOIR COMPARTMENTS, RESPECTIVELY, SAID CYLINDERS BEING ARRANGED IN CONCENTRIC OVERLAPPING RELATIONSHIP WITH SEPARATE DISCHARGE PASSAGES AT ONE END THEREOF; A PISTON RECIPROCABLE IN EACH OF SAID CYLINDERS FROM A FULLY RETRACTED POSITION; A DOUBLE-ACTING FLUID COMPENSATING MEMBER OPERATIVELY MOUNTED AT THE DISCHARGE END OF ONE OF THE CYLINDERS AHEAD OF THE PISTON RECIPROCABLE THEREIN, FOR EQUALIZING PRESSURE IN SAID CYLINDERS; FLUID COMMUNICATING MEANS BETWEEN OPPOSITE ENDS
References Cited (Backward Citations)
US1919465A
Cited
US2074416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |