Rotary valves
AssigneeJaguar Cars Limited
InventorBryan N. V. Parsons
Life of this patent
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Abstract
A rotary valve has a valve rotor with an angular discontinuity, the valve rotor being mounted for rotation relative to a port, so that as it rotates the rotor will open and close the port; a drive train is provided to rotate the rotor, said train being arranged to reduce the speed of the rotor so that it is stationary or near stationary when the port is closed; the port is surrounded by a seating area and the valve rotor is arranged to move into engagement with the seating area and close the port as the speed of the rotor is reduced and move away from the seating area as the speed of the rotor increases.
Claims10
A rotary valve comprising a valve rotor having an annular discontinuity, the valve rotor being mounted for rotation relative to a port so that as it rotates, the discontinuity will open and close the port, drive means being provided to rotate the rotor, said drive means including means to reduce the speed of the rotor when the port is closed, the port being surrounded by a seating area and means being provided to move the rotor so that it engages the seating area and closes the port, when the speed of the rotor is reduced and move the rotor away from the seating area when the speed of the rotor is increased.
Dependencies are inferred from the claim text.