Linkages for moving and retaining a control lever to and in a no

Details Linkages for moving and retaining a control lever to and in a no Linkages for moving and retaining a control lever to and in a no

1975-09-10

1977-02-22

Scott, Samuel

Machine element or mechanism

Control lever and linkage systems

Hand operated

74532, 180 82A, G05G 100

Patent

active

040086267

ABSTRACT:
A control linkage for controlling operation of a control valve of a remote hydraulically operated device is mounted in a vehicle cab and includes a control lever located between the vehicle seat and a door to the cab so as to be within easy reach of a seated operator. When in a normal working position, the lever is located such that it may present an obstacle to operator entry and exit and may be accidently bumped so as to effect actuation of the control valve. In order to prevent this accidental actuation of the control valve, the control linkage includes a safety lever or bar movable between a first position wherein it holds a locking element away from the control lever and extends in blocking relationship to the path of movement of the operator between the seat and door opening, and a second position wherein it is disposed so as to be clear of the path of movement of an operator between the seat and the door and holds a locking element in engagement with the control lever so as to hold the latter in a stored or non-use position out of the path of movement of the operator. The safety lever is inter-connected with the control lever such that when the safety bar is moved from its first to its second position the control lever will move from its normal neutral position to its stored position for locking engagement by the locking element.

REFERENCES:
patent: 3431792 (1969-03-01), Smith
patent: 3691867 (1972-09-01), Bradshaw

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