Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Casters – Leg elevators
Patent
1990-05-16
1991-08-27
Rowan, Kurt
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Casters
Leg elevators
16 19, B60B 3304
Patent
active
050421107
ABSTRACT:
A caster with an installation base comprises a shaft to be secured to a leg or bottom of a machine or instrument, a frame rotatably mounted on the shaft, movement wheels supported on the frame, an installation base arranged unrotatably and vertically movable on the frame, and a handle member for vertically moving the installation base. The frame comprises a connecting portion rotatably mounted on the shaft and an axle supporting portion for supporting an axle of the movement wheels. The installation base comprises a first portion arranged in the periphery of the connecting portion of the frame and formed in the outer peripheral surface with an external thread and a second portion positioned below the shaft to come into contact with an installation surface. The handle member is arranged in the periphery of the first portion of the installation base so that an internal thread formed in the inner peripheral surface thereof is threadedly engaged with the external thread of the installation base and rotatably supported on the shaft.
REFERENCES:
patent: 2385154 (1945-09-01), Nalle
patent: 3455526 (1969-07-01), Orii
patent: 3545707 (1970-12-01), Orii
patent: 3602464 (1971-08-01), Orii
patent: 4339842 (1982-07-01), Fontana
patent: 4364148 (1982-12-01), McVicker
patent: 4800617 (1989-01-01), Yeh
Kabushikigaisha Orii
Miner J.
Rowan Kurt
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