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US 5,421,434 AGranted
Wheel assembly having clutch and brake mechanism
AssigneeUnique Product & Design Co., Ltd.
InventorGordon Liao
Life of this patent
Estimating the term…
Abstract
A wheel includes a hub having a number of teeth formed on one end. A cam is rotatably supported on one end of the hub. An axle is rotatably engaged in the hub and has one end engaged with the cam. A spring biases the axle to engage with the cam. A coupler is rotatably engaged on the axle and includes a key for engaging with the teeth of the hub when the spring biases the axle toward the cam, and the key is disengaged from the teeth when the axle is moved against the spring by the cam. The wheel can be applied to push carts or applied to motor vehicles.
Claims4
A wheel assembly comprising:
- a wheel body including a hub provided therein, said hub including a first end and a second end, a first engaging means provided in said second end of said hub;
- a cam rotatably coupled to said wheel body at said first end of said hub;
- an axle rotatably engaged in said hub and including a first end engaged with said cam and a second end extended outward of said hub;
- means for biasing said axle toward said cam;
- coupler means rotatably engaged on said second end of said axle and movable in concert with said axle, said coupler means connected to a second engaging means;
- said axle being biased toward said cam by said biasing means so as to engage said second engaging means with said first engaging means, and second engaging means being disengaged from said first engaging means when said axle is moved against said biasing means by said cam.
3 more elements
Dependencies are inferred from the claim text.