Patent US3587644A successfully refreshed from Google Patents.
US3587644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-way valve and actuator
Assignee: Laboratory For Electronics Inc
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Filing: 1968-08-12
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Granted: 1971-06-28
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Expires: 1988-08-12
Abstract
Abstract APPARATUS IS DISCLOSED FOR PROVIDING A CARIABLE OUTPUT MOTION IN RESPONSE TO A UNIFORM INPUT MOTION INCLUDING A ROTATABLE DRIVE MEMBER FOR DRIVING AUXILIARY DRIVE MEANS AT A FIRST SPEED DURING A FIRST PORTION OF A REVOLUTION OF THE DRIVE MEMBER TO LOAD AND THEN RELEASE ENERGY STORAGE MEANS WHICH UPON ITS RELEASE DRIVES THE AUXILIARY DRIVE MEANS AT AN INITIALLY HIGHER SECOND SPEED DURING A SECOND PORTION OF A REVOLUTION.
Inventors
- 👤 George M Whitehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:07
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/56; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86445; Y10T137/87917; Y10T137/87981; Y10T137/87997
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |