US3557574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral toothed coupling
Assignee: Caterpillar Inc
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Filing: 1968-11-25
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Granted: 1971-01-26
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Expires: 1988-11-25
Abstract
Abstract A COUPLING COMPRISES TWO JUXTAPOSED FACE GEARS HAVING SPIRAL TEETH OF OPPOSITE HAND FORMED THEREON TO FULLY MESH WITH EACH OTHER. THE COUPLING IS ADAPTED FOR USE AS A FIXED COUPLING BY SECURING THE TWO GEARS TOGETHER, AN AXIALLY ENGAGING CLUTCH BY SELECTIVELY MOVING THE TWO GEARS INTO ENGAGEMENT OR A TORQUE LIMITING DEVICE BY EMPLOYING MEANS FOR CONTROLLING TOOTH SEPARATION WHEN TORQUE LOADS IMPOSED THEREON EXCEED A PREDETERMINED AMOUNT.
Inventors
- 👤 Bennett W Avery
- 👤 Bruce W Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:51
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/076; F16D7/00; F16D7/04; F16D7/042; F16D7/044
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |