Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent
1980-04-24
1982-07-06
Friedman, Carl D.
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Tilts relative to base
52632, 52731, 212266, B66C 2306
Patent
active
043376010
ABSTRACT:
A high-strength light-weight hollow boom section for a multi-section telescopic crane boom comprises a top wall, a bottom wall, and a pair of lateral walls, each lateral wall being located between the top wall and the bottom wall. Each of the four walls comprises a pair of spaced apart longitudinally extending members, a relatively thin plate extending between, overlapping and welded to the pair of longitudinal members, and a plurality of longitudinally spaced part transversely extending stiffeners of U-shaped cross-sections, each stiffener being welded to the plate and to the pair of longitudinal members. Each longitudinal member of a lateral wall is in edge-wise abutting relationship with and welded to the surface of a longitudinal member of one of the top and bottom walls. Each stiffener of a lateral wall also has its ends in abutting relationship with and welded to the surface of a longitudinal member of the top and bottom walls. Novel slide pad arrangements are also disclosed.
REFERENCES:
patent: 3890757 (1975-06-01), Lamer et al.
patent: 4003168 (1977-01-01), Brady
patent: 4016688 (1977-04-01), Tiffin et al.
patent: 4027448 (1977-06-01), Tymciurale
patent: 4045936 (1977-09-01), Sterner
patent: 4112649 (1978-09-01), Fritsch et al.
patent: 4134236 (1979-01-01), Ott
patent: 4257201 (1981-03-01), Lundolt et al.
Gattu Narahari
Vaerk Lembit
Friedman Carl D.
Harnischfeger Corporation
Nilles James E.
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