Patent US3734482A successfully refreshed from Google Patents.
Patent US3282169A successfully refreshed from Google Patents.
US3282169A
Expired / Lapsed
US
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Pneumatic service brake actuator and spring-powered parking-emergency brake actuator with tandem diaphragms
Assignee: Rockwell-Standard Corp
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Filing: 1962-07-24
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Granted: 1966-11-01
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Expires: 1982-07-24
Abstract
No abstract record available.
Inventors
- 👤 Leighton Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:14
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; B; B60; B60T; B60T17/00; B60T17/08; B60T17/083; F16; F16D; F16D2127/00; F16D2127/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A BRAKE ACTUATOR, IN COMBINATION: AN AIR BRAKE DIAPHRAGM AND A BRAKE ROD ARRANGED TO RECEIVE PRESSURE FROM THE FRONT SIDE OF SAID DIAPHRAGM SO AS TO BE PROJECTED IN A SERVICE-BRAKING MOVEMENT; A RETRACTOR DIAPHRAGM ARRANGED BEHIND SAID AIR BRAKE DIAPHRAGM IN PRESSURE-TRANSMITTING ASSOCIATION THEREWITH, FOR MOVING SAID AIR BRAKE DIAPHRAGM AND BRAKE ROD IN A BRAKING MOVEMENT WHEN PROJECTED FORWARDLY; A PLUNGER ENGAGING THE REAR SIDE OF SAID RECTRACTOR DIAPHRAGM, SPRING MEANS ACTING ON SAID PLUNGER FOR PROJECTING SAID DIAPHRAGMS IN AN AUXILIARY BRAKING OPERATION; HOUSING MEANS MOUNTING AND COOPERATING WITH SAID DIAPHRAGMS TO DEFINE A PNEUMATIC CHAMBER IN WHICH AIR UNDER PRESSURE FROM A SERVICE AIR LINE WILL BE EFFECTIVE TO PROJECT SAID AIR BRAKE DIA-
Claim 2
Dependent Claim
120 words
IN A BRAKE ACTUATOR, IN COMBINATION: AN AIR BRAKE DIAPHRAGM AND A BRAKE ROD ARRANGED TO RECEIVE PRESSURE FROM THE FRONT SIDE OF SAID DIAPHRAGM SO AS TO BE PROJECTED IN A SERVICE-BRAKING MOVEMENT; A RETRACTOR DIAPHRAGM ARRANGED BEHIND SAID AIR BRAKE DIAPHRAGM IN PRESSURE-TRANSMITTING ASSOCIATION THEREWITH, FOR MOVING SAID AIR BRAKE DIAPHRAGM AND BRAKE ROD IN A BRAKING MOVEMENT WHEN PROJECTED FORWARDLY; A PLUNGER ENGAGING THE REAR SIDE OF SAID RECTRACTOR DIAPHRAGM, SPRING MEANS ACTING ON SAID PLUNGER FOR PROJECTING SAID DIAPHRAGMS IN AN AUXILIARY BRAKING OPERATION; HOUSING MEANS MOUNTING AND COOPERATING WITH SAID DIAPHRAGMS TO DEFINE A PNEUMATIC CHAMBER IN WHICH AIR UNDER PRESSURE FROM A SERVICE AIR LINE WILL BE EFFECTIVE TO PROJECT SAID AIR BRAKE DIA-
References Cited (Backward Citations)
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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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |