Patent ID: 7566205
Filing Date: 2009-07-28
Classification: F04B,Y10T

Abstract:
1. A reciprocating pump for delivering fluid comprising: a first diaphragm and a second diaphragm that are reciprocated to deliver fluid; diaphragm drive chambers respectively provided therein with said first and second diaphragms; a drive-power supply member for supplying drive power for reciprocating said first and second diaphragms; wherein said drive-power supply member includes a single eccentric cam, and a first piston member and a second piston member that are reciprocated by the rotation of said single eccentric cam; drive powers of said first and second piston members are respectively transmitted to said first and second diaphragms via operating fluid; and an auxiliary drive member is provided for delivering fluid into fluid delivery sections respectively provided within said diaphragm drive chambers; wherein said auxiliary drive member includes a first auxiliary diaphragm and a second auxiliary diaphragm that are reciprocated so as to deliver fluid, and an auxiliary eccentric cam for reciprocating said first and second auxiliary diaphragms; and said auxiliary eccentric cam is rotated by means of a drive-power transmission shaft for driving said single eccentric cam.