Electromagnetic pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 24, 1992
Grant Date -
N/A
app pub date -
May 2, 1991
filing date -
May 10, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electromagnetic pump includes a sleeve member, a resin coil bobbin, a ring-like printed circuit board, a ring-like holder, a plurality of studs, a pump housing, and a projecting portion. The sleeve member houses a plunger for controlling an operation of a control valve. The coil bobbin is arranged around the sleeve member, has a pair of flanges, and winds an excitation coil. The printed circuit board is stacked on the outer surface side of one flange of the coil bobbin with a predetermined interval therebetween and has a surface which faces the coil bobbin and on which various types of electronic parts are mounted. The holder is stacked on the side of the printed circuit board opposite to the coil bobbin with a predetermined interval therebetween. The studs project from the outer surface of the one flange of the coil bobbin and an inner surface of the holder and integrally form a stacked body. The pump housing houses the stacked body integrally formed by the studs and the sleeve member in as assembled state. The projecting portion projects from a predetermined position on the outer surface of the one flange of the coil bobbin to apply an urging force to the various types of electronic parts mounted on the printed circuit board.
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