U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Mechanical transmission clutch control

Patent 4830156 Issued on May 16, 1989. Estimated Expiration Date: Icon_subject February 26, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Transmission control assembly
Patent #: 4146120
Issued on: 03/27/1979
Inventor: Stevens

Control lever gate with lever restraint Patent #: 4297914
Issued on: 11/03/1981
Inventor: Klem ,   et al.

Inventors

Assignee

Application

No. 07/161182 filed on 02/26/1988

US Classes:

192/3.63, Interrelated (e.g., with interlock)192/109F, Cushioning devices for fluid operators192/3.62, With control lever74/473.21, Restriction of shift, gear selection, or gear engagement74/473.33, Control lever movable through plural planes74/900PARTICULAR SHIFT PATTERN

Examiners

Primary: Bonck, Rodney H.
Assistant: Pitts, Andrea L.

Attorney, Agent or Firm

International Classes

F16H 59/02 (20060101)
F16H 61/18 (20060101)
F16H 61/22 (20060101)
F16H 61/70 (20060101)

Abstract

A manually operable creep control mechanism for a tractor of the like having multiple direct drive gears and a creep clutch. The mechanism comprises an elongated arm pivotally mounted on the control box cover plate adjacent the slot through which the gear shift lever travels to shift into the direct drive gear positions. In a first position, the arm is clear of the slot and the gear shift lever is free to move through the entire range of gear positions, while preventing inadvertent pivoting of the arm out of the first position once the lever is in a predetermined low gear, such a fourth. When pivoted to a second position, the arm lies across the slot and limits shifting of the lever to a predetermined higher gear, such as twelfth, while preventing inadvertent movement of the arm out of the second position once the lever is at or beyond the fourth gear position. A flexible switching cable is connected to the arm and an electrical switch for actuating the creep clutch. When the arm is in the first position, the switch is off and when the arm is in the second position the switch is on.

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