Swivel speed control circuit for working vehicle

Details Swivel speed control circuit for working vehicle Swivel speed control circuit for working vehicle

1989-05-08

1991-09-10

Look, Edward K.

Power plants

Pressure fluid source and motor

Valve means reverses flow from pump to reversible rotary motor

60427, 60465, 91429, 91457, 91531, F15B 700

Patent

active

050463128

ABSTRACT:
A hydraulic circuit for controlling the deck swiveling speed of a working vehicle comprises a hydraulic actuator for driving the swivel deck, a flow control valve for controlling a rate of oil flow to the hydraulic actuator, and a direction control valve for switching an operating direction of the hydraulic actuator. The flow control and direction control valves are operatively connected to a swivel control lever. The greater amount of swivel control lever is operated toward a right or left swivel position, to the greater extent the flow control valve is shifted in a flow increasing direction. The direction control valve is operable to switch oil lines in response to an operation of the swivel control lever.

REFERENCES:
patent: 3289546 (1966-12-01), Erickson
patent: 4552503 (1987-07-01), Mouri et al.
patent: 4579042 (1986-04-01), Neff
patent: 4680929 (1985-11-01), Mouri et al.
patent: 4706549 (1987-11-01), Inagaki et al.

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