| 摘要 |
PCT No. PCT/US82/00354 Sec. 371 Date Mar. 22, 1982 Sec. 102(e) Date Mar. 22, 1982 PCT Filed Mar. 22, 1982 PCT Pub. No. WO83/03406 PCT Pub. Date Oct. 13, 1983.This invention relates to a lift mast assembly (10) preferably for a vehicle (34) which eliminates the problems of reduced visibility, reduced load carrying capacity for a given vehicle size and weight. The lift mast assembly has a fixed upright assembly (12) having first and second spaced apart fixed uprights (16,18), a movable upright assembly (14) having first and second movable spaced apart uprights (24,26) and a first and second lift jack. The movable upright assembly (14) is mounted on and between the fixed upright assembly (12) and elevationally movable relative thereto. The first lift jack (60) is mounted on the first fixed upright (16) and positioned between the first fixed and first movable uprights (16,24) and the second lift jack (62) is mounted on the second fixed upright (18) and positioned between the second fixed and second movable uprights (18,26). Therefore, the lift mast asembly improves the visibility, increases the load carrying capacity, maximizes lift heights and reduces lift mast size and weight. The lift mast assembly is particularly useful in a lift truck.
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