Patent US3232677A successfully refreshed from Google Patents.
US3232677A
Expired / Lapsed
US
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Fluid pressure brake control apparatus
Assignee: Westinghouse Air Brake Co
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Filing: 1964-05-22
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Granted: 1966-02-01
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Expires: 1984-05-22
Abstract
No abstract record available.
Inventors
- 👤 Richard L Wilson
- 👤 Richard W Donovan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:41
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/18; B60T15/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
APPARATUS FOR VARYING THE PRESSURE IN ONE BRAKE PIPE IN PATH OF A TRAIN IN ACCORDANCE WITH THE PRESSURE VARIATIONS IN AN OTHER BRAKE PIPE IN THE REMAINING PART OF SAID TRAIN, AND VICE VERSA, COMPRISING: (A) RELAY MEANS RESPONSIVE TO A PREPONDERANCE OF PRESSURE IN SAID OTHER BRAKE PIPE OVER THAT IN SAID ONE BRAKE PIPE EFFECT CHARGING OF SAID ONE BRAKE PIPE BY AN INDEPENDENT PRESSURE SOURCE TO A PRESSURE EQUALING THAT IN SAID OTHER BRAKE PIPE, AND OPERABLE IN REPSONSE TO A PRESSURE REDUCTION IN SAID OTHER BRAKE PIPE RELATIVE TO THAT IN SAID ONE BRAKE PIPE TO VENT SAID ONE BRAKE PIPE TO EQUALIZE THE PRESISURE THEREIN WITH THAT IN SIAD OTHER BRAKE PIPE, (B) MEANS INCLUDING CUT-OFF MEANS OPERABLE IN RESPONSE TO A PRESSURE REDUCTION IN SAID ONE BRAKE PIPE RELATIVE TO THAT IN SAID OTHER BRAKE PIPE TO PREVENT SAID RELAY MEANS FROM EFFECTING SAID CHARGING OF SAID ONE BRAKE PIPE, AND (C) MEANS RESPONSIVE TO A PRESSURE REDUCTION IN SAID ONE BRAKE PIPE RELATIVE TO THE PRESSURE IN SAID OTHER BRAKE PIPE TO CONNECT SAID ONE BRAKE PIPE TO SAID OTHER BRAKE PIPE IN BYPASS OF SAID RELAY MEANS AND SAID CUT-OFF MEANS.
Claim 2
Dependent Claim
200 words
APPARATUS FOR VARYING THE PRESSURE IN ONE BRAKE PIPE IN PATH OF A TRAIN IN ACCORDANCE WITH THE PRESSURE VARIATIONS IN AN OTHER BRAKE PIPE IN THE REMAINING PART OF SAID TRAIN, AND VICE VERSA, COMPRISING: (A) RELAY MEANS RESPONSIVE TO A PREPONDERANCE OF PRESSURE IN SAID OTHER BRAKE PIPE OVER THAT IN SAID ONE BRAKE PIPE EFFECT CHARGING OF SAID ONE BRAKE PIPE BY AN INDEPENDENT PRESSURE SOURCE TO A PRESSURE EQUALING THAT IN SAID OTHER BRAKE PIPE, AND OPERABLE IN REPSONSE TO A PRESSURE REDUCTION IN SAID OTHER BRAKE PIPE RELATIVE TO THAT IN SAID ONE BRAKE PIPE TO VENT SAID ONE BRAKE PIPE TO EQUALIZE THE PRESISURE THEREIN WITH THAT IN SIAD OTHER BRAKE PIPE, (B) MEANS INCLUDING CUT-OFF MEANS OPERABLE IN RESPONSE TO A PRESSURE REDUCTION IN SAID ONE BRAKE PIPE RELATIVE TO THAT IN SAID OTHER BRAKE PIPE TO PREVENT SAID RELAY MEANS FROM EFFECTING SAID CHARGING OF SAID ONE BRAKE PIPE, AND (C) MEANS RESPONSIVE TO A PRESSURE REDUCTION IN SAID ONE BRAKE PIPE RELATIVE TO THE PRESSURE IN SAID OTHER BRAKE PIPE TO CONNECT SAID ONE BRAKE PIPE TO SAID OTHER BRAKE PIPE IN BYPASS OF SAID RELAY MEANS AND SAID CUT-OFF MEANS.
References Cited (Backward Citations)
US1969812A
Cited
US1845492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |