Title:
ELECTROMAGNETIC PUMP
Document Type and Number:
WIPO Patent Application WO/2014/069455
Kind Code:
A1
Abstract:
A plate spring (90) is attached to the distal end part of a piston (60), and the distance (L1) between the distal end of a plunger (34) while a solenoid part (30) has stopped being driven and a core (36) (concave part (36a)) facing the distal end is shorter than a distance (L2) between the distal end (plate spring (90)) of the piston (60) and a protruding end surface of a valve main body (72) facing the distal end. When the solenoid part (30) is driven, the plate spring (90) can thereby be made to collide with the protruding end surface of the valve main body (72), and the plunger (34) can be prevented from colliding with the core (36). As a result, shock on the piston (60) can be absorbed by the elastic force of the plate spring (90), and the occurrence of impact noise can therefore be suppressed.
Inventors:
ISHIKAWA KAZUNORI (JP)
KOKUBU TAKAHIRO (JP)
NAKAI MASAYA (JP)
ISHIKAWA TOMOMI (JP)
KOKUBU TAKAHIRO (JP)
NAKAI MASAYA (JP)
ISHIKAWA TOMOMI (JP)
Application Number:
PCT/JP2013/079260
Publication Date:
May 08, 2014
Filing Date:
October 29, 2013
Export Citation:
Assignee:
AISIN AW CO (JP)
International Classes:
F04B17/04
Foreign References:
| JP2011021593A | 2011-02-03 | |||
| JP2011252491A | 2011-12-15 | |||
| JP2005240599A | 2005-09-08 | |||
| JPH11117858A | 1999-04-27 |
Attorney, Agent or Firm:
ITEC INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Itec international patent firm (JP)
Patent business corporation Itec international patent firm (JP)
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