Castor with pressure brake device
AssigneeElmatek International Corp.
InventorSteven PO-CHENG TUNG
Life of this patent
Estimating the term…
Abstract
A castor with pressure brake device includes a wheel stand; a connecting rod for connecting the wheel stand to a seat base; a wheel shaft; and two wheels. A C-shaped shaft hole is disposed on the wheel stand, and the wheel shaft is longitudinal movably fixed in the C-shaped shaft hole. A groove is disposed above the inner side of the C-shaped shaft hole; a spring is disposed in the groove and arranged vertically to the wheel shaft, wherein an end of the spring is in contact with a bottom of the groove, and the other end of the spring is in contact with the wheel shaft. Each of the wheels comprises a fitting portion, and the fitting portion is tightly sleeved on corresponding one of the two ends of the wheel shaft.
Claims5
A castor with pressure brake device, comprising:
- a wheel stand;
- a connecting rod for connecting said wheel stand to a seat base;
- a wheel shaft, comprising two ends, rotatably fixed on said wheel stand;
- and
- two wheels respectively fixed on said wheel shaft at said two ends of said wheel shaft;
- wherein,
- a C-shaped shaft hole, comprising an inner side, is disposed on said wheel stand, and said wheel shaft is longitudinal movably fixed in said C-shaped shaft hole;
- a groove is disposed above said inner side of said C-shaped shaft hole;
- a spring, comprising a first end and a second end, is disposed in said groove and arranged vertically to said wheel shaft, wherein said first end of said spring is in contact with a bottom of said groove, and said second end of said spring is in contact with said wheel shaft;
- each of said wheels comprises a fitting portion, and said fitting portion is tightly sleeved on corresponding one of said two ends of said wheel shaft;
- said wheel stand comprises a bottom surface, and a brake shoe is disposed on said bottom surface;
- said brake shoe comprises two braking portions;
- and
- each of said braking portions comprises a top surface in close contact with an outer surface of said fitting portion of a corresponding one of said wheels when said wheels are in a braking state.
Dependencies are inferred from the claim text.