Traversing hoists – Having horizontally swinging boom or bridge – Having specific bearing structure
Patent
1982-06-04
1985-04-16
Blix, Trygve M.
Traversing hoists
Having horizontally swinging boom or bridge
Having specific bearing structure
212223, 212225, B66C 2384
Patent
active
045110484
ABSTRACT:
A jib crane system comprising a horizontally extending load beam rigidly attached to the upper end of a vertically extending mast. The lower of the mast extends inside a hollow pipe and is rotatably associated with a base plate assembly or rotatably secured in the foundation at the site of the crane. Roller bearings are rigidly secured to the mast and positioned in frictional contact with the pipe. The roller bearing revolves around the circumference of the pipe as the mast and load beam rotate around the central axis of the mast. The roller bearings are adjustable for varying the frictional contact of the rollers with the pipe.
REFERENCES:
patent: 1018723 (1912-02-01), Milley
patent: 1111416 (1914-09-01), Taylor
patent: 1551768 (1925-09-01), Otis
patent: 3106298 (1963-10-01), Kerridge
patent: 3358849 (1967-12-01), Becker
patent: 4061230 (1977-12-01), Goss et al.
McNelis Robert L.
Volakakis John G.
Wallentin Burt H.
Blix Trygve M.
Goldberg Jerome
Handling Systems, Inc.
Johnson R. B.
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