Power assistance control device
AssigneeBendix Westinghouse Limited
InventorAlistair Gordon Taig
Life of this patent
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Abstract
A fluid power assistance control device includes a rotatable input, a first valve coupled to the input and a second valve. The second valve is rotatable relative to the first valve and a projection between the first and second valves limits the rotation therebetween. The projection cooperates with the valve to substantially define fluid paths which communicate with an outlet and also defines flow restrictions within the paths such that rotation between the valves increases flow restriction in one of the fluid paths and decreases flow restriction in another of the fluid paths. The valves cooperate to define reaction cavities which communicate with respective fluid paths so that fluid communicated to one of the reaction cavities opposes the rotation of the input.
Claims7
A fluid power assistance control device including a rotatable force input member, a first valve member coupled to said force input member for rotation therewith, and a second valve member rotatable relative to said first valve member, one of said first and second valve members having at least one projection projecting into the other of said first and second valve members to limit the rotation between said first and second valve members, said projection cooperating with said first and second valve members to substantially define two fluid flow paths, said fluid flow paths communicating with an outlet port and said projection forming fluid flow restrictions within said fluid flow paths such that relative rotation between said first and second valve members increases the fluid flow restriction in one of said two fluid flow paths and decreases the fluid flow restriction in the other of said two fluid flow paths, said first and second valve members cooperating to substantially define reaction cavities which communicate with respective fluid flow paths such that fluid communicated to one of said reaction cavities opposes the rotation of said force input member.
Dependencies are inferred from the claim text.