US3299741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed transmission
Assignee: Individual
•
Filing: 1964-10-16
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Granted: 1967-01-24
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Expires: 1984-10-16
Abstract
No abstract record available.
Inventors
- 👤 Fred W Twiford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:53
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/72; F16H3/721; F16H3/722
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A TRANSMISSION COMPRISING A DRIVE SHAFT, A FIRST DIFFERENTIAL MECHANISM DRIVEN BY SAID DRIVE SHAFT AND HAVING INPUT AND OUTPUT SHAFTS AND DIFFERENTIATING MECHANISM THEREBETWEEN, SECOND AND THIRD DIFFERENTIAL MECHANISMS HAVING INPUT AND OUTPUT SHAFTS AND DIFFERENTIATING MECHANISMS THEREBETWEEN, MEANS DRIVINGLY CONNECTING THE INPUT SHAFTS OF SAID SECOND AND THIRD DIFFERENTIALS WITH SAID DRIVE SHAFT, MEANS CONNECTING THE INPUT AND OUTPUT SHAFTS OF SAID FIRST DIFFERENTIAL MECHANISM WITH THE DIFFERENTIATING MECHANISM OF THE SECOND AND THIRD DIFFERENTIAL MECHANISMS, RESPECTIVELY, MEANS DRIVINGLY CONNECTING THE OUTPUT SHAFTS OF SAID SECOND AND THIRD DIFFERENTIAL MECHANISMS TOGETHER, ONE OF THE LATTER OUTPUT SHAFTS COMPRISING A DRIVEN SHAFT OF THE TRANSMISSION, AND BRAKE MEANS OPERATIVE ON THE INPUT AND OUTPUT SHAFTS OF SAID FIRST DIFFERENTIAL MECHANISM TO CONTROL OPERATION OF THE DIFFERENTIALS AND VARY THE SPEED AND DIRECTION OF THE DRIVEN SHAFT.
Claim 2
Dependent Claim
137 words
A TRANSMISSION COMPRISING A DRIVE SHAFT, A FIRST DIFFERENTIAL MECHANISM DRIVEN BY SAID DRIVE SHAFT AND HAVING INPUT AND OUTPUT SHAFTS AND DIFFERENTIATING MECHANISM THEREBETWEEN, SECOND AND THIRD DIFFERENTIAL MECHANISMS HAVING INPUT AND OUTPUT SHAFTS AND DIFFERENTIATING MECHANISMS THEREBETWEEN, MEANS DRIVINGLY CONNECTING THE INPUT SHAFTS OF SAID SECOND AND THIRD DIFFERENTIALS WITH SAID DRIVE SHAFT, MEANS CONNECTING THE INPUT AND OUTPUT SHAFTS OF SAID FIRST DIFFERENTIAL MECHANISM WITH THE DIFFERENTIATING MECHANISM OF THE SECOND AND THIRD DIFFERENTIAL MECHANISMS, RESPECTIVELY, MEANS DRIVINGLY CONNECTING THE OUTPUT SHAFTS OF SAID SECOND AND THIRD DIFFERENTIAL MECHANISMS TOGETHER, ONE OF THE LATTER OUTPUT SHAFTS COMPRISING A DRIVEN SHAFT OF THE TRANSMISSION, AND BRAKE MEANS OPERATIVE ON THE INPUT AND OUTPUT SHAFTS OF SAID FIRST DIFFERENTIAL MECHANISM TO CONTROL OPERATION OF THE DIFFERENTIALS AND VARY THE SPEED AND DIRECTION OF THE DRIVEN SHAFT.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |