Patent US3387672A successfully refreshed from Google Patents.
Patent US3169595A successfully refreshed from Google Patents.
US3169595A
Expired / Lapsed
US
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Wheel speed control
Assignee: Shepherd Machinery Co
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Filing: 1961-09-05
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Granted: 1965-02-16
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Expires: 1981-09-05
Abstract
No abstract record available.
Inventors
- 👤 Willard W Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:04
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/175; B60T8/32; B60T8/34; B60T8/48; B60T8/4809
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
IN A WHEEL SPEED CONTROL FOR STEERABLE VEHICLE HAVING FIRST AND SECOND DRIVE WHEELS AND HAVING A MANUALLY ACTUATED STEERING MEANS, THE COMBINATION OF: FIRST SIGNAL GENERATING MEANS FOR GENERATING A FIRST SIGNAL WHICH VARIES AS A FUNCTION OF THE ROTATIONAL SPEED OF THE FIRST WHEEL; SECOND SIGNAL GENERATING MEANS FOR GENERATING A SECOND SIGNAL WHICH VARIES AS A FUNCTION OF THE ROTATIONAL SPEED OF THE SECOND WHEEL; FIRST SPEED REDUCING MEANS FOR REDUCING THE SPEED OF THE FIRST WHEEL; SECOND SPEED REDUCING MEANS FOR REDUCING THE SPEED OF THE SECOND WHEEL; SIGNAL MIXING MEANS FOR DETERMINING THE DIFFERENT BETWEEN FIRST AND SECOND INPUT SIGNALS AND PRODUCING AN OUTPUT SIGNAL WHICH VARIES AS A FUNCTION OF SUCH DIFFERENCE; MEANS FOR COUPLING SAID FIRST AND SECOND SIGNALS TO SAID SIGNAL MIXING MEANS AS INPUTS; TURNING RATE MEANS FOR VARYING SAID OUTPUT SIGNAL AS A FUNCTION OF THE TURNING RATE OF THE VEHICLE; MEANS FOR CONNECTING SAID MANUALLY ACTUATED STEERING MEANS TO SAID TURNING RATE MEANS IN DRIVING RELATION; AND MEANS FOR COUPLING SAID OUTPUT SIGNAL TO SAID SPEED REDUCING MEANS IN CONTROLLING RELATION FOR REDUCING THE SPEED OF A DRIVE WHEEL WHEN ITS SPEED EXCEEDS THAT OF THE OTHER DRIVEN WHEEL BY A PREDETERMINED AMOUNT WHICH VARIES WITH THE TURNING RATE OF THE VEHICLE.
Claim 2
Dependent Claim
213 words
IN A WHEEL SPEED CONTROL FOR STEERABLE VEHICLE HAVING FIRST AND SECOND DRIVE WHEELS AND HAVING A MANUALLY ACTUATED STEERING MEANS, THE COMBINATION OF: FIRST SIGNAL GENERATING MEANS FOR GENERATING A FIRST SIGNAL WHICH VARIES AS A FUNCTION OF THE ROTATIONAL SPEED OF THE FIRST WHEEL; SECOND SIGNAL GENERATING MEANS FOR GENERATING A SECOND SIGNAL WHICH VARIES AS A FUNCTION OF THE ROTATIONAL SPEED OF THE SECOND WHEEL; FIRST SPEED REDUCING MEANS FOR REDUCING THE SPEED OF THE FIRST WHEEL; SECOND SPEED REDUCING MEANS FOR REDUCING THE SPEED OF THE SECOND WHEEL; SIGNAL MIXING MEANS FOR DETERMINING THE DIFFERENT BETWEEN FIRST AND SECOND INPUT SIGNALS AND PRODUCING AN OUTPUT SIGNAL WHICH VARIES AS A FUNCTION OF SUCH DIFFERENCE; MEANS FOR COUPLING SAID FIRST AND SECOND SIGNALS TO SAID SIGNAL MIXING MEANS AS INPUTS; TURNING RATE MEANS FOR VARYING SAID OUTPUT SIGNAL AS A FUNCTION OF THE TURNING RATE OF THE VEHICLE; MEANS FOR CONNECTING SAID MANUALLY ACTUATED STEERING MEANS TO SAID TURNING RATE MEANS IN DRIVING RELATION; AND MEANS FOR COUPLING SAID OUTPUT SIGNAL TO SAID SPEED REDUCING MEANS IN CONTROLLING RELATION FOR REDUCING THE SPEED OF A DRIVE WHEEL WHEN ITS SPEED EXCEEDS THAT OF THE OTHER DRIVEN WHEEL BY A PREDETERMINED AMOUNT WHICH VARIES WITH THE TURNING RATE OF THE VEHICLE.
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) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |