US3264951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake actuator
Assignee: Berg Manufacturing and Sales Co
•
Filing: 1964-01-17
•
Granted: 1966-08-09
•
Expires: 1984-01-17
Abstract
No abstract record available.
Inventors
- 👤 Harold L Dobrikin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:17
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A BRAKE ACTUATOR COMPRISING A HOUSING, SAID HOUSING HAVING A CYLINDRICAL PORTION, AN OUTWARDLY FLARED PORTION JOINING SAID CYLINDRICAL PORTION, A DIAPHRAGM CLOSING SAID OUTWARDLY FLARED PORTION, A CHAMBER PORTION ON THE OPPOSITE SIDE OF SAID DIAPHRAGM, A BRAKE ROD RECIPROCAL IN SAID CHAMBER PORTION, A PLATE CARRIED BY SAID BRAKE ROD FOR ENGAGEMENT WITH ONE SURFACE OF SAID DIAPHRAGM, A RETURN SPRING ENGAGING SAID PLATE AND SAID CHAMBER PORTION AND POSITIONED TO URGE SAID DIAPHRAGM TOWARD SAID CYLINDRICAL PORTION, A PISTON HAVING A LENGTH SUBSTANTIALLY EQUAL TO THE LENGTH OF SAID CYLINDRICAL PORTION AND RECIPROCALLY MOUNTED IN SAID CYLINDRICAL PORTION, A SERVICE PRESSURE INLET POSITIONED IN SAID HOUSING TO DELIVER FLUID PRESSURE TO THE OPPOSITE SIDE OF SAID DIAPHRAGM, AN EMERGENCY PRESSURE INLET POSITIONED TO DELIVER FLUID PRESSURE TO THE OPPOSITE SIDE OF SAID PISTON FROM SAID DIAPHRAGM, SAID PISTON HAVING A SEAL RING CARRIED IN ITS OUTER SURFACE FOR ENGAGEMENT WITH THE INNER SURFACE OF SAID CYLINDRICAL PORTION, THE OUTER CYLINDRICAL SURFACE OF SAID PISTON BEING TAPERED IN OPPOSITE DIRECTIONS AWAY FROM SAID SEAL AND HAVING AN OUTWARDLY FLARED PORTION ADJACENT SAID DIAPHRAGM FOR CENTERING ENGAGEMENT WITH SAID FLARED HOUSING PORTION WHEN SAID PISTON IS MOVED AWAY FROM SAID CHAMBER.
Claim 2
Dependent Claim
202 words
A BRAKE ACTUATOR COMPRISING A HOUSING, SAID HOUSING HAVING A CYLINDRICAL PORTION, AN OUTWARDLY FLARED PORTION JOINING SAID CYLINDRICAL PORTION, A DIAPHRAGM CLOSING SAID OUTWARDLY FLARED PORTION, A CHAMBER PORTION ON THE OPPOSITE SIDE OF SAID DIAPHRAGM, A BRAKE ROD RECIPROCAL IN SAID CHAMBER PORTION, A PLATE CARRIED BY SAID BRAKE ROD FOR ENGAGEMENT WITH ONE SURFACE OF SAID DIAPHRAGM, A RETURN SPRING ENGAGING SAID PLATE AND SAID CHAMBER PORTION AND POSITIONED TO URGE SAID DIAPHRAGM TOWARD SAID CYLINDRICAL PORTION, A PISTON HAVING A LENGTH SUBSTANTIALLY EQUAL TO THE LENGTH OF SAID CYLINDRICAL PORTION AND RECIPROCALLY MOUNTED IN SAID CYLINDRICAL PORTION, A SERVICE PRESSURE INLET POSITIONED IN SAID HOUSING TO DELIVER FLUID PRESSURE TO THE OPPOSITE SIDE OF SAID DIAPHRAGM, AN EMERGENCY PRESSURE INLET POSITIONED TO DELIVER FLUID PRESSURE TO THE OPPOSITE SIDE OF SAID PISTON FROM SAID DIAPHRAGM, SAID PISTON HAVING A SEAL RING CARRIED IN ITS OUTER SURFACE FOR ENGAGEMENT WITH THE INNER SURFACE OF SAID CYLINDRICAL PORTION, THE OUTER CYLINDRICAL SURFACE OF SAID PISTON BEING TAPERED IN OPPOSITE DIRECTIONS AWAY FROM SAID SEAL AND HAVING AN OUTWARDLY FLARED PORTION ADJACENT SAID DIAPHRAGM FOR CENTERING ENGAGEMENT WITH SAID FLARED HOUSING PORTION WHEN SAID PISTON IS MOVED AWAY FROM SAID CHAMBER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |