Anti-lowering device for a boom loader

Details Anti-lowering device for a boom loader Anti-lowering device for a boom loader

1975-09-04

1976-12-07

Paperner, L. J.

Traversing hoists

Overhead

Cable

212 39R, 214140, E02F 316

Patent

active

039957616

ABSTRACT:
In a loader having a boom structure that reciprocates along its sidewalls, at least one stop member, having a cam surface and an abutment surface, is disposed at a predetermined height adjacent one of the sidewalls and operative between first and second positions. In the first position, the stop member projects outwardly from the sidewall into the path of travel of the boom structure whereby a portion of the boom structure may be lowered into engagement with the abutment surface to prohibit further downward movement of the boom structure. As the boom structure is swung upwardly and engages the cam surface, the stop member retracts inwardly to the second position, thereby permitting the boom structure to be raised above the predetermined height. Preferably, a pair of stop members, each one disposed on opposite sidewalls of the loader, may be used.

REFERENCES:
patent: 1497501 (1924-06-01), Graboski
patent: 1595004 (1926-08-01), Haight
patent: 3215292 (1965-11-01), Halls
patent: 3396863 (1968-08-01), Borer et al.
patent: 3730362 (1973-05-01), Hurlburt et al.
patent: 3918601 (1975-11-01), Zimmerman

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