Pumps – Motor driven – Electric or magnetic motor
Patent
1993-04-21
1994-07-26
Casaregola, Louis J.
Pumps
Motor driven
Electric or magnetic motor
92 98D, F04B 4300
Patent
active
053323700
ABSTRACT:
A miniature diaphragm pump comprises a motor having an output shaft rotating about its axis, an eccentric pin fixed in eccentric relation to the axis of the output shaft, a drive member connected to the eccentric pin to be driven thereby to reciprocate in a direction perpendicular to the axis of the output shaft, at least one pump chamber disposed radially outwardly of the drive element with respect to the axis of the output shaft and having inlet and outlet valves. Each pump chamber has one diaphragm surface with a rigid joint rod and is connected with the drive member through the joint rod. The reciprocating motion of the drive member is transmitted to each pump chamber such that one pumping action including a compression step and an inflation step is provided to the respective pump chamber during one revolution of the eccentric pin about the output shaft. In addition, since the drive member is reciprocated in the direction perpendicular to the output shaft, it is not necessary to take a large space between the motor and each pump chamber for obtaining the reciprocating motion of the drive member, so that the diaphragm pump as a whole becomes to be small.
REFERENCES:
patent: 4232851 (1980-11-01), Johnson
patent: 4406591 (1983-09-01), Louis
patent: 4542624 (1985-09-01), Mizusaki
patent: 4801249 (1989-01-01), Kakizawa
patent: 4931000 (1990-06-01), Fleming, Jr.
patent: 4987920 (1991-01-01), Donner
patent: 5074757 (1991-12-01), Horn
patent: 5074763 (1991-12-01), Degremont
patent: 5219274 (1993-06-01), Pawlowski et al.
Fujiwara Makoto
Nakatani Mitsuo
Nakayama Satoshi
Watari Yoshie
Casaregola Louis J.
Kocharov Michael I.
Matsushita Electric & Works Ltd.
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