US3248961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt shifter for multiple speed drive
Assignee: Midwestern Instruments Inc
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Filing: 1964-01-03
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Granted: 1966-05-03
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Expires: 1984-01-03
Abstract
No abstract record available.
Inventors
- 👤 William C Bortzfield
- 👤 Howard R Cederberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:39
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/22; F16H61/00; F16H61/66; F16H61/662
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A BELT AND PULLEY ASSEMBLY HAVING A PAIR OF JUXTAPOSED PULLEYS: A SHIFTABLE CAM; A MOVABLE MEMBER ADAPTED TO ENGAGE SAID BELT AND RESPONSIVE TO MOVEMENT OF SAID CAM FOR SHIFTING THE BELT FROM ONE OF SAID JUXTAPOSED PULLEYS TO THE OTHER THEREOF, SAID MEMBER BEING PROVIDED WITH A FOLLOWER IN ENGAGEMENT WITH THE CAM DURING MOVEMENT OF THE LATTER; AND MEANS COUPLED WITH SAID CAM FOR SHIFTING THE LATTER FROM A FIRST POSITION TO A SECOND POSITION TO ACTUATE SAID MEMBER AND THEREBY SHIFT THE BELT, SAID MEANS INCLUDING STRUCTURE FOR SHIFTING THE CAM FROM SAID FIRST POSITION TO A PREDETERMINED DISPOSITION BETWEEN SAID POSITIONS, AND FORCE APPLYING MEANS BIASING THE CAM TOWARD SAID SECOND POSITION AFTER THE CAM IS SHIFTED FROM SAID FIRST POSITION TO SAID PREDETERMINED DISPOSITION.
Claim 2
Dependent Claim
131 words
IN A BELT AND PULLEY ASSEMBLY HAVING A PAIR OF JUXTAPOSED PULLEYS: A SHIFTABLE CAM; A MOVABLE MEMBER ADAPTED TO ENGAGE SAID BELT AND RESPONSIVE TO MOVEMENT OF SAID CAM FOR SHIFTING THE BELT FROM ONE OF SAID JUXTAPOSED PULLEYS TO THE OTHER THEREOF, SAID MEMBER BEING PROVIDED WITH A FOLLOWER IN ENGAGEMENT WITH THE CAM DURING MOVEMENT OF THE LATTER; AND MEANS COUPLED WITH SAID CAM FOR SHIFTING THE LATTER FROM A FIRST POSITION TO A SECOND POSITION TO ACTUATE SAID MEMBER AND THEREBY SHIFT THE BELT, SAID MEANS INCLUDING STRUCTURE FOR SHIFTING THE CAM FROM SAID FIRST POSITION TO A PREDETERMINED DISPOSITION BETWEEN SAID POSITIONS, AND FORCE APPLYING MEANS BIASING THE CAM TOWARD SAID SECOND POSITION AFTER THE CAM IS SHIFTED FROM SAID FIRST POSITION TO SAID PREDETERMINED DISPOSITION.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |