Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1980-12-22
1982-10-05
Spar, Robert J.
Material or article handling
Vertically swinging load support
Shovel or fork type
92 15, 172466, 298 17B, B66C 2300
Patent
active
043526268
ABSTRACT:
A locking member is disclosed that is selectively operable to secure the loader boom arms in a raised position for service or repair. The locking member is pivotally connected to a boom arm for movement to an operative position between the boom arm and its respective lift cylinder where it is restrained in compression between the boom arm and lift cylinder to latch the boom arm in a raised position against collapsing movement. The locking member includes a pair of spaced apart, parallel, and aligned mounting plates, each being generally in the form of a right triangle and a generally U-shaped yoke fixed between the mounting plates and extending along opposed corresponding sides of the mounting plates for a part of their length. In the inoperative position of the locking member, one side of the generally U-shaped yoke is held in a substantially abutting relationship with the underside of the boom arm such that the locking member is out of the way where it will not interfere with the normal operation of the boom arm. The locking member is movable to an operative position where the U-shaped yoke abuts against the end of the lift cylinder and straddles the lift cylinder piston rod thereby providing a rigid strut between the lift cylinder and boom arm to support the boom arm in its raised position against collapsing movement.
REFERENCES:
patent: 3477518 (1969-11-01), Walker et al.
patent: 3982648 (1976-09-01), Luedtke et al.
patent: 4039093 (1977-08-01), Schmitz et al.
Frisbee Claude M.
Seaberg David H.
J. I. Case Company
Spar Robert J.
Underwood Donald W.
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