Transport lock system for an implement or the like

Details Transport lock system for an implement or the like Transport lock system for an implement or the like

1981-04-10

1982-11-23

Johnson, Richard J.

Earth working

With ground support vertically adjustable relative to frame

Power operated adjustment

172466, A01B 6322

Patent

active

043600670

ABSTRACT:
A transport lock system for an implement or the like having a frame and transport wheels movable between lowered transport positions wherein the frame is raised for transport and raised positions wherein the frame and ground working tools thereon are lowered for an operating mode, and having a fluid pressure operated cylinder operative to move the transport wheels between their raised and lowered positions. The transport lock system includes a lock link and locking pin which are selectively cooperable to prevent an operator from lowering the frame during a transport mode and includes a flow control valve operative in response to movement of the locking pin to a locking position to prevent the operator from inadvertently applying fluid pressure to the cylinder in a manner to lower the frame. The control valve is operative in response to movement of the locking pin to a non-locking position to enable actuation of the cylinder to raise and lower the frame. An operator control lever enables the operator to urge the locking pin to a selected position but actual change in position is prevented unless predetermined movement of the transport wheels is first effected.

REFERENCES:
patent: 2553315 (1951-05-01), Hansen
patent: 2592841 (1952-04-01), Acton
patent: 2606414 (1952-08-01), Dyrr
patent: 2606532 (1952-08-01), Ziskal
patent: 2669818 (1954-02-01), Pursche
patent: 2871960 (1959-02-01), Smith
patent: 4073345 (1978-02-01), Miller

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