Control lever assembly for power shift transmission and modulati

192 clutches and power-stop control – Transmission control and clutch control – Common control

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

192 092, 192109F, 74531, 74471XY, 74483K, 123179K, 251297, B60K 2900, B60K 2100

Patent

active

039931757

ABSTRACT:
The power train of a crawler tractor comprises a hydraulically operated modulating main clutch (operated by a clutch control valve) for transmitting motive power from the tractor engine to a hydraulically operated reversible multi-speed range power shift transmission (operated by a shift selector valve) for varying the speed at the output shaft of the transmission. A control lever assembly at the tractor operator's station comprises a manually operable gear selector lever and a manually operable safety lever. The gear selector lever is pivotally mounted on an oscillatable shaft and movable laterally in opposite directions from a centered neutral position to rotate the oscillatable shaft and thereby operate the shift selector valve (connected to the oscillatable shaft) and shift the transmission to either first or second speed ranges in either forward or reverse direction. The gear selector lever extends through a slot in a U-shaped bracket which is mounted for fore and aft pivotal movement and is connected by specially-shaped cam means to operate the clutch control valve. The gear selector lever is also pivotally movable fore and aft in any selected speed range to effect corresponding fore and aft movement of the bracket and thereby operate the clutch control valve to cause transmission output shaft speed to vary in the speed range selected. An adjustable friction assembly imposes drag on the gear selector lever to provide control "feel" for the operator. The safety lever is pivotally mounted for fore and aft movement between engine-start and engine-run position and, when placed in engine-start position, actuates an electric safety switch which enables the tractor engine to be started. Interlock means connected to and between the gear selector lever and the safety lever ensure that the safety lever cannot be placed in engine-start position unless the shift selector lever is placed in neutral.

REFERENCES:
patent: 2716474 (1955-08-01), Panish
patent: 2747035 (1956-05-01), Hansen et al.
patent: 3095754 (1963-07-01), Mayon et al.
patent: 3292751 (1966-12-01), McRay et al.
patent: 3352392 (1967-11-01), Black et al.
patent: 3550466 (1970-12-01), Ham
patent: 3811020 (1974-05-01), Johnson et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Control lever assembly for power shift transmission and modulati does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control lever assembly for power shift transmission and modulati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control lever assembly for power shift transmission and modulati will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-226994

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.