Patent ID: 6467655
Filing Date: 2002-10-22
Classification: G01F

Abstract:
A pump dispenser, comprising:a valve block having a first slide contact surface; a pump block having a second slide contact surface adapted to be in contact with the first slide contact surface of the valve block; a plunger inserted to a single plunger insert hole drilled along an axial direction of the pump block, the plunger being slidable in the axial direction; a pump-driving shaft supported by the pump block, the pump-driving shaft being rotatable with the pump block and advanceable toward and retractable from the pump block together with the plunger; a rotary driver for controllably rotating the pump-driving shaft per one rotation unit; and an advancement and retraction driver for advancing and retracting the pump-driving shaft relative to the valve block, wherein the valve block has a discharge port for intercommunicating a discharge opening formed on the first slide contact surface with a discharge hole formed on an outside opposite to the first slide contact surface and a suction port for intercommunicating a suction opening formed on the first slide contact surface with a supply hole facing a liquid supply side, wherein the plunger insert hole of the pump block is drilled at a position capable of being in communication with the discharge opening and the suction opening of the valve block along an axial direction, and wherein the advancement and retraction driver includes a follower attached to the pump-driving shaft and a guide member capable of adjusting inclination angle thereof relative to a reference surface orthogonal with the axial direction of the pump-driving shaft, the guide member guiding the follower moving in accordance with the rotation of the pump-driving shaft to advance and retract the pump-driving shaft.