US3354744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shifting device for motor vehicle transmissions
Assignee: ZF Friedrichshafen AG
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Filing: 1965-07-28
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Granted: 1967-11-28
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Expires: 1985-07-28
Abstract
No abstract record available.
Inventors
- 👤 Kuhnle Willi
- 👤 Frei Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:10
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0206; F16H61/0211; F16H47/00; F16H47/06; F16H47/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A VEHICLE HAVING A MULTI-RATIO TRANSMISSION WITH A PLURALITY OF DRIVE RATIO ESTABLISHING DEVICES, A CONTROL SYSTEM FOR AUTOMATICALLY OPERATING SAID DEVICES COMPRISING, MEANS FOR GENERATING A SIGNAL VOLTAGE VARYING IN ACCORDANCE WITH VEHICLE SPEED, A CONSTANT SOURCE OF ENERGIZING CURRENT FOR ACTUATING SAID DRIVE RATIO ESTABLISHING DEVICES, SERIES CONNECTED SWITCH MEANS OPERATIVELY CONNECTING SAID SOURCE OF ENERGIZING CURRENT TO THE DEVICES FOR ACTUATION THEREOF, A PLURALITY OF SWITCH OPERATING CIRCUITS RESPECTIVELY CONNECTED TO SAID SWITCH MEANS FOR SEQUENTIALLY ACTUATING SAID DEVICES IN RESPONSE TO VARIATION IN SAID SIGNAL VOLTAGE, AND TRANSFORMER MEANS OPERATIVELY COUPLING SAID GENERATING MEANS TO EACH OF SAID SWITCH OPERATING CIRCUITS FOR ENERGIZATION THEREOF AT A PREDETERMINED SIGNAL VOLTAGE, EACH OF SAID SWITCH OPERATING CIRCUITS HAVING MEANS FOR DEENERGIZATION AT A SIGNAL VOLTAGE DIFFERENT FROM SAID PREDETERMINED SIGNAL VOLTAGE.
Claim 2
Dependent Claim
134 words
IN A VEHICLE HAVING A MULTI-RATIO TRANSMISSION WITH A PLURALITY OF DRIVE RATIO ESTABLISHING DEVICES, A CONTROL SYSTEM FOR AUTOMATICALLY OPERATING SAID DEVICES COMPRISING, MEANS FOR GENERATING A SIGNAL VOLTAGE VARYING IN ACCORDANCE WITH VEHICLE SPEED, A CONSTANT SOURCE OF ENERGIZING CURRENT FOR ACTUATING SAID DRIVE RATIO ESTABLISHING DEVICES, SERIES CONNECTED SWITCH MEANS OPERATIVELY CONNECTING SAID SOURCE OF ENERGIZING CURRENT TO THE DEVICES FOR ACTUATION THEREOF, A PLURALITY OF SWITCH OPERATING CIRCUITS RESPECTIVELY CONNECTED TO SAID SWITCH MEANS FOR SEQUENTIALLY ACTUATING SAID DEVICES IN RESPONSE TO VARIATION IN SAID SIGNAL VOLTAGE, AND TRANSFORMER MEANS OPERATIVELY COUPLING SAID GENERATING MEANS TO EACH OF SAID SWITCH OPERATING CIRCUITS FOR ENERGIZATION THEREOF AT A PREDETERMINED SIGNAL VOLTAGE, EACH OF SAID SWITCH OPERATING CIRCUITS HAVING MEANS FOR DEENERGIZATION AT A SIGNAL VOLTAGE DIFFERENT FROM SAID PREDETERMINED SIGNAL VOLTAGE.
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |