Power transmission having power take-off shaft and fluid control

Details Power transmission having power take-off shaft and fluid control Power transmission having power take-off shaft and fluid control

1979-06-28

1981-06-30

Herrmann, Allan D.

Machine element or mechanism

Power take-off

From shaft extension

192 18A, 192113B, F16H 3700, F16D 6704, F16D 1374

Patent

active

042756073

ABSTRACT:
A power transmission for tractors or the like and having change speed gear mechanism and also having a power take-off shaft for driving auxiliary equipment. A hydraulically actuated clutch is utilized in the transmission for selectively engaging various gear ratios. A hydraulically actuated brake is provided for disconnecting the drive shafts and locking the power take-off to the transmission housing. Operating control valve means are provided for controlling the power take-off brake and a hydraulic detent is provided for the valve. The power take-off shaft is controlled by a modulatable clutch of the duplex type which enables the operator to modulate the speed of the power take-off shift and automatically insures that the power take-off shaft is locked and the power take-off brake is disengaged. The control valve for the power take-off brake includes a hydraulic detent that can lock the operator shifted control valve in the clutch operative position.

REFERENCES:
patent: 3137311 (1964-06-01), Rohweder et al.
patent: 3139908 (1964-07-01), Strader
patent: 3209872 (1965-10-01), Moyer et al.
patent: 3438399 (1969-04-01), Barnes et al.
patent: 3540556 (1970-11-01), Snoy
patent: 3638773 (1972-02-01), Lewis et al.
patent: 3805931 (1974-04-01), Portmann
patent: 3971461 (1976-07-01), Conroy et al.
patent: 4031762 (1977-06-01), Shellberg
patent: 4083382 (1978-04-01), Khatti et al.

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