Caster device
OwnerPo-Chuan Tsaiinventor
Life of this patent
Estimating the term…
Abstract
A caster device includes a support unit, two caster wheels, a resilient member, two friction wheels, and two protruding teeth units. Each of the caster wheels has an inner wheel surface and a plurality of meshing teeth that are angularly arranged and that are formed on the inner wheel surface. Each of the protruding teeth units includes a plurality of protruding teeth. The support unit is downwardly movable against a resilient force of the resilient member to a stop position, where each of the friction wheels is in frictional contact with the meshing teeth of a respective one of the caster wheels, and where the protruding teeth of each of the protruding teeth units are meshed with the meshing teeth of the respective one of the caster wheels.
Claims8
A caster device comprising:
- a support unit;
- two caster wheels spaced apart along an axis (L) which extends in a left-right direction (X), and rotatably and respectively mounted to opposite lateral sides of said support unit, each of which is hollow and has
- an inner wheel surface that surrounds the axis (L), and
- a plurality of meshing teeth that are angularly arranged and that are formed on said inner wheel surface;
- a resilient member retained in said support unit for biasing said support unit upwardly;
- two friction wheels respectively mounted at bottoms of said opposite lateral sides of said support unit, and being respectively proximate to said inner wheel surfaces of said caster wheels;
- and
- two protruding teeth units being respectively adjacent to said friction wheels, each of said protruding teeth units including a plurality of protruding teeth that protrude downwardly;
- wherein said support unit is downwardly movable relative to said caster wheels against a resilient force of said resilient member from a released position, where each of said friction wheels is separated from said meshing teeth of a respective one of said caster wheels and where said protruding teeth of each of said protruding teeth units are separated from said meshing teeth of the respective one of said caster wheels, to a stop position, where each of said friction wheels is in frictional contact with said meshing teeth of the respective one of said caster wheels and where said protruding teeth of each of said protruding teeth units are meshed with said meshing teeth of the respective one of said caster wheels to thereby impede the rotation of said caster wheels.
Dependencies are inferred from the claim text.