Patent US3090591A successfully refreshed from Google Patents.
US3090591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control valve
Assignee: JR Clarkson Co LLC
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Filing: 1958-12-22
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Granted: 1963-05-21
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Expires: 1978-12-22
Abstract
No abstract record available.
Inventors
- 👤 Clarkson John Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:12
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A FLOW CONTROL VALVE COMPRISING A THICK-WALLED SUBSTANTIALLY CYLINDRICAL TUBE CONSISTING A RUBBER-LIKE ELASTOMERIC MATERIAL AND HAVING RIGIDLY CIRCUMFERENTIALLY SUPPORTED AXIALLY SPACED END REGIONS AND AN UNSUPPORTED CIRCUMFERENTIALLY COMPRESSIBLE CENTRAL REGION; AN ANNULAR THICK WALLED CONSTRICTOR ELEMENT OF ELASTOMERIC MATERIAL SEPARABLE FROM SAID TUBE AND SURROUNDING SAID TUBE CENTRAL REGION IN UNINTERRUPED BAND OF SURFACE TO SURFACE CONTACT THEREWITH; A RIGID CASING SURROUNDING SAID TUBE AND ELEMENT, MEANS FIXING THE ENDS OF SAID TUBE TO SAID CASING, AND SELECTIVELY OPERATIVE MEANS FOR CAUSING SAID ELEMENT TO EXERT A CIRCUMFERENTIALLY UNIFORM RADIALLY DIRECTED COMPENSIVE FORCE UPON SAID TUBE WITHIN SAID BAND.
Claim 2
Dependent Claim
100 words
A FLOW CONTROL VALVE COMPRISING A THICK-WALLED SUBSTANTIALLY CYLINDRICAL TUBE CONSISTING A RUBBER-LIKE ELASTOMERIC MATERIAL AND HAVING RIGIDLY CIRCUMFERENTIALLY SUPPORTED AXIALLY SPACED END REGIONS AND AN UNSUPPORTED CIRCUMFERENTIALLY COMPRESSIBLE CENTRAL REGION; AN ANNULAR THICK WALLED CONSTRICTOR ELEMENT OF ELASTOMERIC MATERIAL SEPARABLE FROM SAID TUBE AND SURROUNDING SAID TUBE CENTRAL REGION IN UNINTERRUPED BAND OF SURFACE TO SURFACE CONTACT THEREWITH; A RIGID CASING SURROUNDING SAID TUBE AND ELEMENT, MEANS FIXING THE ENDS OF SAID TUBE TO SAID CASING, AND SELECTIVELY OPERATIVE MEANS FOR CAUSING SAID ELEMENT TO EXERT A CIRCUMFERENTIALLY UNIFORM RADIALLY DIRECTED COMPENSIVE FORCE UPON SAID TUBE WITHIN SAID BAND.
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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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |