Patent US3250293A successfully refreshed from Google Patents.
US3250293A
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US
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Electric and fluid pressure operated valve mechanism
Assignee: American Brake Shoe Co
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Filing: 1963-10-17
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Granted: 1966-05-10
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Expires: 1983-10-17
Abstract
No abstract record available.
Inventors
- 👤 Cecil E Adams
- 👤 Leo H Dillon
- 👤 George M Hipple
- 👤 Glenn A Norris
- 👤 William F Weese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:36
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0635; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7837; Y10T137/7904
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A TRANSDUCER AND FLUID PRESSURE OPERATED VALVE INCLUDING BORE; A PORT AND POPPET IN SAID BORE, SAID POPPET CONTROLLING THE FLOW OF FLUID THROUGH SAID PORT, SAID POPPET HAVING A SUBSTANTIALLY FALT END FACE WHICH FORMS A VALVE WITH SAID PORT, THE DIAMETER OF SAID FACE BEING LARGER THAN THE DIAMETER OF SAID PORT SO THAT SAID FACE EXTENDS OUTWARDLY BEYOND SAID PORT, MEANS DEFINING A SPACE IN SAID BORE EXTENDING SUBSTANTIALLY ENTIRELY AROUND SAID FACE WHICH FLUID ENTERS RADIALLY AFTER PASSING OVER SAID FACE, A TRANSDUCER FOR URGING SAID POPPET TOWARD SAID PORT INCLUDING A SHAFT; MEANS FOR GUIDING SAID SHAFT INCLUDING AN
References Cited (Backward Citations)
US487991A
Cited
US2031478A
Cited
US2568026A
Cited
US2619111A
Cited
US2578795A
Cited
US2796885A
Cited
US2934090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |