Traversing hoists – Having vertically swinging boom – Having means to swing boom vertically
Patent
1987-02-20
1988-07-26
Peters, Jr., Joseph F.
Traversing hoists
Having vertically swinging boom
Having means to swing boom vertically
52118, B66C 2300
Patent
active
047594527
ABSTRACT:
A support shoe assembly (30,32) for a boom having telescoping inner and outer boom sections includes a pair of articulated wear pads (52) which are mounted at the outer end of the inner boom section in sliding engagement with the inner boom section. The wear pads (52) include rounded upper surfaces in sliding engagement with the outside lower corners of the inner boom section, and rounded lower surfaces supported in similarly contoured blocks (54) for rocking movement about a transverse axis to avoid point loading and reduce bending effects so that lighter boom sections can be utilized without reducing reach or loading capacity. The support blocks (54) are preferably mounted for adjustable lateral positioning for wear/play takeup and maintenance of proper frictional engagement between the contoured support pads (52) and the lower corners of the inner boom section.
REFERENCES:
patent: 3719403 (1973-03-01), Sung
patent: 3719404 (1973-03-01), Sterner
patent: 3796016 (1974-03-01), Wu
patent: 3830376 (1974-08-01), Fritsch
patent: 4004695 (1977-01-01), Hockensmith et al.
patent: 4134236 (1979-01-01), Ott
patent: 4264265 (1981-04-01), Stoychoff
Faint Richard C.
Krupke LeRoy G.
Avila Stephen P.
Peters Jr. Joseph F.
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