DIAPHRAGM PUMP DEVICE

Japanese Patent JP3542990

B2

PROBLEM TO BE SOLVED: To provide a diaphragm pump capable of prolonging a life.
SOLUTION: The diaphragm pump 1 is provided with a diaphragm 12 partitioning a liquid feed chamber 14 and an operation fluid chamber 15; a body part 2 reciprocatedly supporting a center rod in which the diaphragm 12 is mounted to both ends; and a pair of casing members 3 disposed so as to clamp the body part 2 from both sides and clamping a peripheral part 42 of the diaphragm 12 from both sides in a thick thickness direction in cooperation with the body part 2. An annular lip part 43 extending in a reciprocation direction of the center rod 11 and to both sides in the thick thickness direction of the diaphragm 12 is formed on an outer periphery part of the peripheral part 42. An annular wall part 28 constituting an annular recessed part 27 is formed on the casing member 3. An annular spring member 44 for pressing the annular lip part 43 toward the body part 2 and the casing member 3 is thread-fitted on an outer periphery side of the annular wall part 28.

JPH11218074	PISTON PUMP
WO/2003/022328	INFUSION DEVICE AND DRIVING MECHANISM FOR SAME
JP3676890	SPRING MADE OF RESIN AND BELLOWS TYPE QUANTITATIVE PUMP USING THE SPRING

Shigeru Murata

JP2001371325A

July 14, 2004

December 05, 2001

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Yamada Corporation

F04B53/10; F04B43/02; F04B43/06; F04B43/073; F16J3/02; (IPC1-7): F04B43/02; F04B43/06; F04B53/10; F16J3/02

JP11132149A
JP9184484A
JP63272978A
JP59122787A
JP63004382U
JP6031650B2
JP62173565U

WO2001040646A1

Kazuo Shamoto
Shosuke Imai
Tadashi Masui
Yasushi Kobayashi
Hiroyuki Tomita

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