US3349671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holding valve with thermal relief
Assignee: BENTON HARBOR ENGINEERING WORK
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Filing: 1965-10-21
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Granted: 1967-10-31
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Robert L Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:29
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/01; F16; F16K; F16K17/00; F16K17/003; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7765; Y10T137/7771; Y10T137/8593; Y10T137/87169; Y10T137/87233; Y10T137/87241
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A HOLDING VALVE ASSEMBLY FOR A FLUID ACTUATOR, THE COMBINATION COMPRISING: A VALVE MEMBER HAVING FIRST PASSAGE MEANS ADAPTED TO BE CONNECTED TO A FLUID RETURN LINE, SECOND PASSAGE MEANS IN SAID VALVE MEMBER ADAPTED TO BE CONNECTED TO ONE SIDE OF THE ACTUATOR, A MOVABLE VALVE MEMBER RESPONSIVE TO PRESSURE IN SAID FIRST PASSAGE MEANS FOR PROVIDING COMMUNICATION BETWEEN SAID FIRST AND AND SECOND PASSAGE MEANS, SAID MOVABLE VALVE MEMBER NORMALLY BLOCKING COMMUNICATION BETWEEN SAID FIRST AND SECOND PASSAGE MEANS IN RESPONSE TO RELATIVELY LOWER PRESSURE IN SAID FIRST PASSAGE MEANS FOR SELECTIVELY OPENING SAID VALVE MEMBER TO PERMIT FLUID FLOW FROM SAID SECOND PASSAGE MEANS TO SAID FIRST PASSSAGE MEANS, AND RELIEF VALVE MEANS IN SAID MOVABLE VALVE MEMBER RESPONSIVE TO EXCESSIVE PRESSURE IN SAID SECOND PASSAGE MEANS FOR PROVIDING COMMUNICATION BETWEEN SAID SECOND AND FIRST PASSAGE MEANS.
Claim 2
Dependent Claim
141 words
IN A HOLDING VALVE ASSEMBLY FOR A FLUID ACTUATOR, THE COMBINATION COMPRISING: A VALVE MEMBER HAVING FIRST PASSAGE MEANS ADAPTED TO BE CONNECTED TO A FLUID RETURN LINE, SECOND PASSAGE MEANS IN SAID VALVE MEMBER ADAPTED TO BE CONNECTED TO ONE SIDE OF THE ACTUATOR, A MOVABLE VALVE MEMBER RESPONSIVE TO PRESSURE IN SAID FIRST PASSAGE MEANS FOR PROVIDING COMMUNICATION BETWEEN SAID FIRST AND AND SECOND PASSAGE MEANS, SAID MOVABLE VALVE MEMBER NORMALLY BLOCKING COMMUNICATION BETWEEN SAID FIRST AND SECOND PASSAGE MEANS IN RESPONSE TO RELATIVELY LOWER PRESSURE IN SAID FIRST PASSAGE MEANS FOR SELECTIVELY OPENING SAID VALVE MEMBER TO PERMIT FLUID FLOW FROM SAID SECOND PASSAGE MEANS TO SAID FIRST PASSSAGE MEANS, AND RELIEF VALVE MEANS IN SAID MOVABLE VALVE MEMBER RESPONSIVE TO EXCESSIVE PRESSURE IN SAID SECOND PASSAGE MEANS FOR PROVIDING COMMUNICATION BETWEEN SAID SECOND AND FIRST PASSAGE MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |