Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1976-03-24
1977-06-21
Blunk, Evon C.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
B66F 906
Patent
active
040305686
ABSTRACT:
A lift truck mast assembly providing unobstructed visibility for the truck operator is provided. The assembly includes a pair of spaced-apart mast uprights for supporting a load bearing carriage. Hydraulic jacks for lifting the carriage are mounted outboard of the mast uprights so that the space between such uprights is unobstructed. The mast uprights include inner and outer telescoping channel members. The inner channel members are provided with laterally extending flange plates each having a pin-receiving, locating aperture. The rod portion of each of the hydraulic jacks is equipped with a chain sheave assembly and each sheave assembly is provided with a vertically extending locator pin. Upon extension of the rod portions, the carriage is free-lifted until the locator pins are received by the flange plate apertures at which point the inner channel members are raised concurrently with the carriage relative to the outer channel members of the mast uprights.
REFERENCES:
patent: 2399632 (1946-05-01), Guerin
patent: 2456320 (1948-12-01), Repke
patent: 2581791 (1952-01-01), Gilman
patent: 3127956 (1964-04-01), Hosbein et al.
patent: 3203568 (1965-08-01), Quayle
Blunk Evon C.
Caterpillar Tractor Co.
Rowland James L.
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