B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
B66F 3/12 (2006.01) B66F 3/00 (2006.01) B66F 3/08 (2006.01)
Patent
CA 2593129
In a pantagraph-type jack, inner bosses (14, 15) are integrally formed on inner side surfaces of opposite side plate portions (7a, 8a) of each lower arm (7) and each upper arm (8) so as to support lower pivots (5) and upper pivots (6), respectively; outer bosses (14', 15') are integrally formed on outer side surfaces of the opposite side plate portions (7a, 8a) of each lower arm (7) and each upper arm (8) so as to support the lower pivots (5) and the upper pivots (6), respectively; and the outer bosses (14', 15') rotatably contacts inner side surfaces of opposite side plate portions (1a, 2a) of each of the base (1) and the load bearing platform (2). Thus, a frictional torque is minimized between the lower arms (7) and the base (1) as well as between the upper arms (8) and the load bearing platform (2) when the load bearing platform (2) is raised and lowered, and a support strength of the lower arms (7) with respect to the lower pivots (5) and a support strength of the upper arms (8) with respect to the upper pivots are enhanced.
Rikenkaki Kogyo Kabushiki Kaisha
Smart & Biggar
LandOfFree
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