Patent US4577773A successfully refreshed from Google Patents.
Patent US3229645A successfully refreshed from Google Patents.
US3229645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power and free conveyors
Assignee: Jervis B Webb Co
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Filing: 1964-03-12
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Granted: 1966-01-18
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Expires: 1984-03-12
Abstract
No abstract record available.
Inventors
- 👤 Clarence A Dehne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:19
CPC Classifications
B; B61; B61B; B61B10/00; B61B10/02; B61B10/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A CONVEYOR OF THE TYPE INCLUDING A LOAD TRACK, A POWER TRACK ADJACENT THERETO SUPPORTING AN ENDLESS PROPELLING MEMBER HAVING PUSHERS PROJECTING TOWARD THE LOAD TRACK, AND A CARRIER ON THE LOAD TRACK HAVING MOVABLE ONE-WAY DRIVING AND HOLDBACK DOGS PROJECTING TOWARD THE POWER TRACK TO TRAP A PUSHER, CHARACTERIZED BY THE HOLDBACK DOG PROJECTING TOWARD THE POWER TRACK A DISTANCE LESS THAN THAT OF THE DRIVING DOG, AND A TRACK SECTION ALONG WHICH THE SPACING BETWEEN THE LOAD AND POWER TRACKS IS CHANGED FROM A NORMAL SPACING IN WHICH A PUSHER OVERLAPS BOTH THE DRIVING AND HOLDBACK DOGS TO AN INCREASE SPACING IN WHICH PUSHER OVERLAPS THE DRIVING DOG BUT NOT THE HOLDBACK DOG.
Claim 2
Dependent Claim
115 words
A CONVEYOR OF THE TYPE INCLUDING A LOAD TRACK, A POWER TRACK ADJACENT THERETO SUPPORTING AN ENDLESS PROPELLING MEMBER HAVING PUSHERS PROJECTING TOWARD THE LOAD TRACK, AND A CARRIER ON THE LOAD TRACK HAVING MOVABLE ONE-WAY DRIVING AND HOLDBACK DOGS PROJECTING TOWARD THE POWER TRACK TO TRAP A PUSHER, CHARACTERIZED BY THE HOLDBACK DOG PROJECTING TOWARD THE POWER TRACK A DISTANCE LESS THAN THAT OF THE DRIVING DOG, AND A TRACK SECTION ALONG WHICH THE SPACING BETWEEN THE LOAD AND POWER TRACKS IS CHANGED FROM A NORMAL SPACING IN WHICH A PUSHER OVERLAPS BOTH THE DRIVING AND HOLDBACK DOGS TO AN INCREASE SPACING IN WHICH PUSHER OVERLAPS THE DRIVING DOG BUT NOT THE HOLDBACK DOG.
References Cited (Backward Citations)
US948678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |