Pumping apparatus for vehicle seat

A pumping apparatus for a vehicle seat, comprising an input member rotated by torque input from a handle lever, a clutch unit configured to transmit the input torque to a link mechanism of a seat cushion, a brake unit configured to cut off the torque input in reverse from the link mechanism, a housing accommodating the clutch unit therein, and a fixing member coupled to a rear end of the housing to be fastened to one side of a seat, wherein:

• the input member comprises a first input member disposed in front of the housing, and a second input member forcibly connected to the first input member and accommodated in the housing;
• and
• the clutch unit comprises a torque transmission member arranged on an outer peripheral surface of the second input member, and an annular control member having a clutch friction surface formed on an inner peripheral surface thereof for frictional engagement with the torque transmission member, the control member being open at front and rear portions thereof.