US3204920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operator
Assignee: Rockwell Manufacturing Co
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Filing: 1962-01-09
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Granted: 1965-09-07
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Expires: 1982-01-09
Abstract
No abstract record available.
Inventors
- 👤 William A Generke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:46
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/02; F15B15/06; F15B15/066; F16; F16K; F16K31/00; F16K31/12; F16K31/16; F16K31/163; F16K31/1635; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/18944
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
THE COMBINATION OF A VALVE HAVING A PLUG ROTATABLE ABOUT ITS AXIS FROM A FIRST FULLY CLOSED POSITION THROUGH A SECOND MINIMUM-FLOW-ESTABLISHING POSITION WHEREIN THE VALVE CRACKS OPEN TO A THIRD FULLY OPEN POSITION AND REQUIRING THE APPLICATION OF MAXIMUM VALVE-OPENING TORQUE AS IT MOVES THROUGH SAID SECOND POSITION; AND MECHANISM FOR EXERTING VALVE-OPENING TORQUE ON SAID VALVE PLUG, SAID MECHANISM BEING SO CONSTRUCTED AND ARRANGED TO EXERT CONTINUOUSLY INCREASING VALVE-OPENING TORQUE ON SAID VALVE PLUG AS THE LATTER MOVES FROM SAID FIRST TOWARD SAID SECOND POSITIONS, SAID TORQUE BECOMING A MAXIMUM AS SAID VALVE MOVES THROUGH SAID SECOND POSITION AND THEN DECREASING AS SAID VALVE MOVES FROM SAID SECOND TO SAID THIRD POSITION.
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |