Brakes for bicycles and other chain driven mechanisms
AssigneeSarun Holdings Limited
InventorJonathan Phillips
Life of this patent
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Abstract
The invention provides a crank assembly for a chain driven mechanism such as a bicycle. The crank assembly has at one end of a crank arm, a journal adapted for engagement with an axle. The axle has at its other end a connection. The one end of the crank arm has mounted thereon a housing via a unidirectional variable clutch, the housing having an extension to which, in use, an activation means such as a brake cable or cables is/are attached. The arrangement is such that during normal forward rotation the crank arm moves normally and the housing is stationary relative thereto, while during back or reverse movement of the crank arm the housing moves to activate the brake cable or cable means.
Claims21
An assembly for a chain driven mechanism such as a bicycle, comprising:
- a crank having at one end of a crank arm a journal adapted for engagement with an axle, said crank arm having at its other end a connection, said one end of said crank arm having mounted thereon a housing via a unidirectional variable clutch, said housing having an extension to which, in use, a brake activator with a device for biasing the braking force between front and rear brakes is attached, the arrangement being such that during forward rotation, said axle and crank arm rotate forwardly and said housing is stationary, while during reverse movement of said crank arm, said housing moves to activate said brake activator.
A cable bias clamp suitable for use in a bicycle brake system, adapted to provide differential braking to front and rear wheels of said bicycle, comprising:
- a member adapted to be attached, at a first and second location, to front and rear brake cables;
- and
- a tensioning means located asymmetrically with respect to the longitudinal axis of said front and rear brake cables so that when tension is applied to the tensioning means, differential tension is applied to the front and rear brake cables.
Dependencies are inferred from the claim text.