초록 ▼

A dolly, including a platform supported upon several caster wheels, and a single control knob on the dolly, when released, brakes all the wheels simultaneously and at a same time locks all caster wheels from swiveling; each caster wheel including a mechanism which when released, wedges a pair of rol

A dolly, including a platform supported upon several caster wheels, and a single control knob on the dolly, when released, brakes all the wheels simultaneously and at a same time locks all caster wheels from swiveling; each caster wheel including a mechanism which when released, wedges a pair of rollers from opposite directions against the wheel rim, and at the same time jambs an eccentrically carried post on the wheel bracket against a resilient rubber or plastic pad stationarily mounted under the platform.

대표청구항 ▼

A dolly, comprising in combination, a platform mounted upon a frame, integral with a plurality of underside plates each of which is mounted upon a caster wheel assembly each of which includes a caster wheel rotatable about an axle supported in an inverted, U-shaped bracket, said bracket being pivota

A dolly, comprising in combination, a platform mounted upon a frame, integral with a plurality of underside plates each of which is mounted upon a caster wheel assembly each of which includes a caster wheel rotatable about an axle supported in an inverted, U-shaped bracket, said bracket being pivotable about a vertical king pin supported in said plate, a thrust bearing between said plate and said bracket, a brake mechanism for said caster wheel and a swivel lock for said bracket; said brake mechanism comprising a pair of roller movable by lever means for being wedged between a rim of said wheel and a stationary component of said bracket; said swivel lock comprising a post carried by said bracket and being upwardly movable by said lever means so to jamb against a frictionally holding element upon an underside of said plate; said lever means comprising a lever pivotable on a stationary pin through an intermediate portion thereof, one end of said lever being connected to said brake mechanism while an opposite end of said lever is connected to a spring-loaded bead chain, said bead chains from each said caster wheel assembly extending through said king pins and being all connected to eccentric points around a single reel so to wind therearound, said reel being integral with a pulley having a cable wound therearound, and a knob on an end of said cable; said reel and pulley being supported rotatably on a shaft extending downward from an underside of said platform.