US3308929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling apparatus
Assignee: Deere and Co
•
Filing: 1965-10-11
•
Granted: 1967-03-14
•
Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 George H Shriver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
B; B65; B65G; B65G39/00; B65G39/02; B65G39/07; B65G39/071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A BELT-TYPE CONVEYOR COMPRISING: A PLURALITY OF SUBSTANTIALLY CYLINDRICAL ROLLERS, AT LEAST ONE OF SAID ROLLERS HAVING A PAIR OF AXIALLY SPACED CIRCUMFERENTIAL RIBS ON ITS OUTER PERIPHERY, EACH RIB HAVING A SUBSTANTIALLY RECTANGULAR CROSS SECTION WITH AN AXIAL DIMENSION LESS THAN 10% OF THE AXIAL DIMENSION OF THE ROLLER AND A RADIAL DIMENSION LESS THAN 10% OF THE DIAMETER OF THE ROLLER; AND AN ENDLESS, FLEXIBLE BELT TRAINED AROUND THE ROLLERS, THE RIBS OPERATIVELY ENGAGING A SURFACE OF THE BELT TO KEEP THE BELT RUNNING TRUE.
Claim 2
Dependent Claim
87 words
A BELT-TYPE CONVEYOR COMPRISING: A PLURALITY OF SUBSTANTIALLY CYLINDRICAL ROLLERS, AT LEAST ONE OF SAID ROLLERS HAVING A PAIR OF AXIALLY SPACED CIRCUMFERENTIAL RIBS ON ITS OUTER PERIPHERY, EACH RIB HAVING A SUBSTANTIALLY RECTANGULAR CROSS SECTION WITH AN AXIAL DIMENSION LESS THAN 10% OF THE AXIAL DIMENSION OF THE ROLLER AND A RADIAL DIMENSION LESS THAN 10% OF THE DIAMETER OF THE ROLLER; AND AN ENDLESS, FLEXIBLE BELT TRAINED AROUND THE ROLLERS, THE RIBS OPERATIVELY ENGAGING A SURFACE OF THE BELT TO KEEP THE BELT RUNNING TRUE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |