Patent ID: 7287842

Claim:
A pressurizing pump device comprising: a drive motor for driving a pump; a pump portion for discharging a pressurizing fluid from a pump chamber by increasing and reducing a volume of the pump chamber by linearly reciprocating to move a pressing member for pressing the pump chamber; a converting mechanism converting a rotational movement of the drive motor into a linear reciprocating movement to thereby linearly reciprocate the pressing member; and a valve mechanism provided in a fluid path tube in which the pressurizing fluid flows and capable of releasing a pressurization by the pressurizing fluid; wherein a control unit executes a pressurizing operation of the pump portion where a rotation of the drive motor in one direction is converted into the linear reciprocating movement of the pressing member by the converting mechanism, and the pressurization is releasable by bringing the valve mechanism into an opened state by rotating the drive motor in another direction.