US3390642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprocket construction for conveyor chains
Assignee: Jervis B Webb Co
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Filing: 1966-08-15
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Granted: 1968-07-02
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Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Gordon A Torrance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:12
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/30; B; B65; B65G; B65G15/00; B65G15/60; B65G23/00; B65G2201/00; B65G2201/06; B65G2812/00; B65G2812/02; B65G2812/02267; B65G2812/02277; B65G2812/02287
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
141 words
A SPROCKET FOR TRANSMITTING DRIVE FROM A MAIN DRIVEN CHAIN OF A POWER AND FREE CONVEYOR TO A BRANCH CHAIN THEREOF, THE SPROCKET HAVING A BODY PORTION ROTATABLE ON A CENTRAL AXIS AND A SERIES OF RADIALLY PROJECTING TEETH; CHARACTERIZED BY EACH TOOTH BEING FORMED WITH ONE CHAIN ENGAGING PORTION AT ONE RADIUS FROM THE SPROCKET AXIS AND FACING IN ONE DIRECTION OF SPROCKET ROTATION AND WITH A SECOND CHAIN ENGAGING PORTION FORMED AT A DIFFERENT RADIUS FROM THE SPROCKET AXIS AND FACING IN THE OPPOSITE DIRECTION OF SPROCKET ROTATION, A SPROCKET TOOTH PROJECTING THROUGH ONE OF SAID CHAINS AND SIMULTANEOUSLY ENGAGING THE OTHER THEREOF, ONE OF THE CHAIN HAVING A DIFFERENT EFFECTIVE PITCH THAN THE OTHER AND THE DIFFERENCE IN RADIUS OF SAID CHAIN ENGAGING PORTIONS OF EACH SPROCKET TOTH BEING PROPORTIONAL TO THE DIFFERENCE IN PITCH OF THE CHAINS.
References Cited (Backward Citations)
US576719A
Cited
US2949862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |