Lock device for dump trucks

Details Lock device for dump trucks Lock device for dump trucks

1978-04-27

1979-12-04

Blix, Trygve M.

Land vehicles: dumping

Tilting

Operating mechanism

298 38, B60P 116

Patent

active

041768817

ABSTRACT:
A self acting lock which automatically locks down the dump body of a truck and automatically releases when the body is to be raised. Two pairs of lever arms which are pivoted together cooperate with a single acting hydraulic cylinder to provide a hoist for raising and lowering the dump body. The upper arms are pivoted to the body and the lower arms are pivoted to a pair of links which are in turn pivotally mounted to the truck frame. Each link carries a hook which engages with a keeper rod carried on the upper pair of arms to lock down the body. A leg extending from the upper arms pivots the links in a direction to engage the hooks with the keeper rod in response to lowering of the dump body to the load carrying position. The linkage is arranged such that initial extension of the cylinder pivots the links in a direction to release the hooks from the rod before continued extension of the cylinder raises the dump body in the usual manner.

REFERENCES:
patent: Re22955 (1977-12-01), Penney
patent: 131095 (1872-09-01), Glover
patent: 1670232 (1928-05-01), Biszantz
patent: 2954995 (1960-10-01), Grise

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