US3340749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously variable transmission having extended drive ratio range
Assignee: ZF Friedrichshafen AG
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Filing: 1965-04-30
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Granted: 1967-09-12
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Magg Alfred
- 👤 Haessle Heinz
- 👤 Schrciner Friedrich
- 👤 Liebel Roland
- 👤 Bredschneider Klaus
- 👤 Buettner Hans
- 👤 Peterson Erich
- 👤 Schrodt Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:23
CPC Classifications
F; F16; F16H; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H37/0846; F16H2037/088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PLURAL SPEED TRANSMISSION COMPRISING, AN INPUT MEMBER, AN OUTPUT MEMBER, INFINITELY VARIABLE DRIVE MEANS CONNECTED TO SAID INPUT MEMBER HAVING A LIMITED DRIVE RATIO RANGE, A PLANETARY GEAR UNIT HAVING A PLURALITY OF DRIVINGLY ENGAGED ELEMENTS INCLUDING A DRIVE ELEMENT CONNECTED TO SAID INFINITELY VARIABLE DRIVE MEANS FOR ROTATION AT INFINITELY VARIABLE SPEED DRIVE RATIO LIMITS, A DRIVEN ELEMENT CONNECTED TO SAID OUTPUT MEMBER AND A CONTROL ELEMENT, AND SPEED CHANGE GEAR MEANS DRIVINGLY CONNECTING THE INPUT MEMBER TO THE PLANETARY GEAR UNIT THROUGH SEPARATE DRIVE TRAINS AT FIXED DRIVE RATIOS EQUAL TO THE DRIVE RATIO LIMITS OF THE INFINITELY VARIABLE DRIVE MEANS.
Claim 2
Dependent Claim
104 words
A PLURAL SPEED TRANSMISSION COMPRISING, AN INPUT MEMBER, AN OUTPUT MEMBER, INFINITELY VARIABLE DRIVE MEANS CONNECTED TO SAID INPUT MEMBER HAVING A LIMITED DRIVE RATIO RANGE, A PLANETARY GEAR UNIT HAVING A PLURALITY OF DRIVINGLY ENGAGED ELEMENTS INCLUDING A DRIVE ELEMENT CONNECTED TO SAID INFINITELY VARIABLE DRIVE MEANS FOR ROTATION AT INFINITELY VARIABLE SPEED DRIVE RATIO LIMITS, A DRIVEN ELEMENT CONNECTED TO SAID OUTPUT MEMBER AND A CONTROL ELEMENT, AND SPEED CHANGE GEAR MEANS DRIVINGLY CONNECTING THE INPUT MEMBER TO THE PLANETARY GEAR UNIT THROUGH SEPARATE DRIVE TRAINS AT FIXED DRIVE RATIOS EQUAL TO THE DRIVE RATIO LIMITS OF THE INFINITELY VARIABLE DRIVE MEANS.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |