US3117496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety brake chamber
Assignee: Berg Airlectro Products Co
•
Filing: 1959-12-01
•
Granted: 1964-01-14
•
Expires: 1979-12-01
Abstract
No abstract record available.
Inventors
- 👤 Harold L Dobrikin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:11
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/08; B60T17/083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
IN A BRAKE-OPERATING DEVICE A HOUSING, AN APERTURED ANNUAL WALL ELEMENT DIVIDING SAID HOUSING INTO A SERVICE CHAMBER AND AN EMERGENCY CHAMBER, A DIAPHRAGM DIVIDING SAID SERVICE CHAMBER, A BRAKE-OPERATING MEMBER IN CONTACT WITH AT LEAST ONE SIDE OF SAID DIAPHRAGM AND EXTENDING FROM SAID SERVICE CHAMBER, A PISTON RECIPROCAL IN SAID EMERGENCY CHAMBER, SAID PISTON HAVING A PORTION EXTENDING FROM SAID EMERGENCY CHAMBER TO MOVE SAID BRAKE-OPERATING MEMBER, A FLUID PRESSURE INLET COMMUNICATING WITH SAID SERVICE CHAMBER AND POSITIONED TO DELIVER FLUID PRESSURE TO THE OPPOSITE SIDE OF SAID DIAPHRAGM, A COIL SPRING IN SAID EMERGENCY CHAMBER POSITIONED TO URGE SAID PISTON TOWARD OPERATING ENGAGEMENT WITH SAID BRAKE-OPERATING MEMBER, A SECOND FLUID PRESSURE INLET COMMUNICATING WITH SAID EMERGENCY CHAMBER AND POSITIONED TO DELIVER FLUID PRESSURE TO SAID PISTON TO URGE SAID PISTON AWAY FROM OPERATING ENGAGEMENT WITH SAID BRAKE-OPERATING MEMBER, SAID SPRING HAVING A PLURALITY OF COILS, THE DIAMETER OF THE COILS AT THE OPPOSITE ENDS OF SAID SPRING BEING LESS THAN THE DIAMETER OF THE COIL ADJACENT THE MID-POINT OF SAID SPRING.
Claim 2
Dependent Claim
174 words
IN A BRAKE-OPERATING DEVICE A HOUSING, AN APERTURED ANNUAL WALL ELEMENT DIVIDING SAID HOUSING INTO A SERVICE CHAMBER AND AN EMERGENCY CHAMBER, A DIAPHRAGM DIVIDING SAID SERVICE CHAMBER, A BRAKE-OPERATING MEMBER IN CONTACT WITH AT LEAST ONE SIDE OF SAID DIAPHRAGM AND EXTENDING FROM SAID SERVICE CHAMBER, A PISTON RECIPROCAL IN SAID EMERGENCY CHAMBER, SAID PISTON HAVING A PORTION EXTENDING FROM SAID EMERGENCY CHAMBER TO MOVE SAID BRAKE-OPERATING MEMBER, A FLUID PRESSURE INLET COMMUNICATING WITH SAID SERVICE CHAMBER AND POSITIONED TO DELIVER FLUID PRESSURE TO THE OPPOSITE SIDE OF SAID DIAPHRAGM, A COIL SPRING IN SAID EMERGENCY CHAMBER POSITIONED TO URGE SAID PISTON TOWARD OPERATING ENGAGEMENT WITH SAID BRAKE-OPERATING MEMBER, A SECOND FLUID PRESSURE INLET COMMUNICATING WITH SAID EMERGENCY CHAMBER AND POSITIONED TO DELIVER FLUID PRESSURE TO SAID PISTON TO URGE SAID PISTON AWAY FROM OPERATING ENGAGEMENT WITH SAID BRAKE-OPERATING MEMBER, SAID SPRING HAVING A PLURALITY OF COILS, THE DIAMETER OF THE COILS AT THE OPPOSITE ENDS OF SAID SPRING BEING LESS THAN THE DIAMETER OF THE COIL ADJACENT THE MID-POINT OF SAID SPRING.
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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) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |