Epicyclic change speed gears
AssigneeRaleigh Industries Limited
InventorAnthony William Hillyer
Life of this patent
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Abstract
A gear hub for a bicycle has two co-operating epicyclic gear trains selectively connectable together to a drive input means and to the gear hub under the control of an axially fixed, manually actuable rotatable cam operating on various pawls through axially shiftable cam followers to give a requisite drive transmission path through the gear trains appropriate to the gear ratio selected.
Claims14
An epicyclic change-speed gear hub for a bicycle, tricycle or the like comprises first and second epicyclic gear trains arranged for operation about a common axis, uni-directional clutch means between such gear trains adapted selectively drivingly to connect the same, first output uni-directional clutch means adapted drivingly selectively to connect the planet cages of the epicyclic gear trains with the hub shell, second output uni-directional clutch means adapted drivingly and selectively to connect the gear rings, of the epicyclic gear trains with the hub shell, input uni-directional clutch means selectively co-operable with the respective epicyclic gear trains, a driver drivingly connected with the input uni-directional clutch means and adapted to transmit a forward drive motion to the hub through such means, and a cam and cam follower mechanism adapted, according to position relative to the axis of the hub, to control the relative conditions of the input and output uni-directional clutch means selectively to give a drive transmission path through the hub consistent with requirements.
Dependencies are inferred from the claim text.