Patent US3572140A successfully refreshed from Google Patents.
US3572140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High torque manual operator
Assignee: RES ENGINEERING CORP
•
Filing: 1969-03-14
•
Granted: 1971-03-23
•
Expires: 1989-03-14
Abstract
Abstract AN OPERATOR HAVING AN OUTPUT MEMBER LINKED TO AN INPUT SHAFT IN THE FOLLOWING MANNER. LINKAGES JOIN THE MEMBER TO NUTS THAT ARE THREADEDLY ENGAGED TO OPPOSITELY SPACED LONGITUDINAL SCREWS, BOTH SCREWS BEING OF THE SAME TURN, I.E., RIGHT OR LEFT HANDED. SIMILAR ENDS OF THE SCREWS ARE KEYED TO WORM WHEELS, THE WHEELS BEING OF OPPOSITE TURN ONE TO THE OTHER. THE WHEELS ARE ENGAGED WITH DUAL WORMS POSITIONED TOWARD OPPOSITE ENDS OF A COMMON SHAFT, THE WORMS BEING OF OPPOSITE TURNS. THIS SHAFT SERVES AS AN INPUT SHAFT.
Inventors
- 👤 Ronald A Gulick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:02
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/50; F16K31/502; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312; Y10T74/18328; Y10T74/18568; Y10T74/18576; Y10T74/18608
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |