Small-sized pump
First Claim
1. A diaphragm pump comprising a common valve chamber having a delivery port, a casing having a plural number of cylinders respectively arranged on a substantially same circular line round said common valve chamber, diaphragms respectively arranged in said cylinders and having end portions, to form pump chamber communication portions arranged to make said pump chambers respectively communicate with said common valve chamber, first check valves respectively arranged in said communicating portions, suction ports provided to each of said pump chambers, second check valves provided to said suction ports, drive portions respectively provided to said diaphragms constituting said pump chambers, and a source of driving force arranged to drive said drive portions, said diaphragms being in a cup-like form having outer circumferences arranged in contact with the inside wall surfaces of said cylinders at portions spaced from the end portions thereof, said diaphragm pump being arranged that said diaphragms are respectively driven by said drive portions so that said diaphragms respectively perform reciprocating motions in the axial direction of an output shaft of said source of driving force in such a manner that a predetermined time lag is maintained between said reciprocating motions of said diaphragms, and said diaphragm pump being arranged that said respective pump chambers are thereby made to repeatedly perform pumping action in turn so that the fluid from said respective pump chambers is delivered through said delivery port after passing through said common valve chamber.
1 Assignment
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Accused Products
Abstract
A small-sized pump comprising a common valve chamber, a plural number of pump chambers respectively arranged round the common valve chamber and each having a diaphragm, a drive member provided in the inclined state and serving to move the diaphragms upward and downward, and a tubular supporting member extending obliquely downward from the central portion of the drive member, the small-sized pump being arranged to make the end of the tubular supporting member perform circular motion and to thereby drive the drive member so as to move the diaphragms upward and downward so that respective pump chambers perform pumping actions with a predetermined time lag, the small-sized pump being thereby arranged to have high pumping efficiency.
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Citations
14 Claims
- 1. A diaphragm pump comprising a common valve chamber having a delivery port, a casing having a plural number of cylinders respectively arranged on a substantially same circular line round said common valve chamber, diaphragms respectively arranged in said cylinders and having end portions, to form pump chamber communication portions arranged to make said pump chambers respectively communicate with said common valve chamber, first check valves respectively arranged in said communicating portions, suction ports provided to each of said pump chambers, second check valves provided to said suction ports, drive portions respectively provided to said diaphragms constituting said pump chambers, and a source of driving force arranged to drive said drive portions, said diaphragms being in a cup-like form having outer circumferences arranged in contact with the inside wall surfaces of said cylinders at portions spaced from the end portions thereof, said diaphragm pump being arranged that said diaphragms are respectively driven by said drive portions so that said diaphragms respectively perform reciprocating motions in the axial direction of an output shaft of said source of driving force in such a manner that a predetermined time lag is maintained between said reciprocating motions of said diaphragms, and said diaphragm pump being arranged that said respective pump chambers are thereby made to repeatedly perform pumping action in turn so that the fluid from said respective pump chambers is delivered through said delivery port after passing through said common valve chamber.
Specification