(19)
(11) EP 0 856 857 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.09.1998 Bulletin 1998/39

(43) Date of publication A2:
05.08.1998 Bulletin 1998/32

(21) Application number: 98300502.6

(22) Date of filing: 26.01.1998
(51) International Patent Classification (IPC)6: H01F 27/28
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 28.01.1997 JP 29546/97

(71) Applicant: ZEXEL CORPORATION
Tokyo (JP)

(72) Inventor:
  • Kawaguchi, Tomoyoshi
    Tomioka-shi, Gunma-ken (JP)

(74) Representative: Britter, Keith Palmer 
Britter & Co. Barn West, The Dixies, High Street, Ashwell
Baldock Hertfordshire SG7 5NT
Baldock Hertfordshire SG7 5NT (GB)

   


(54) Solenoid valve


(57) A solenoid valve (1) comprises a fixed core (10), a bottomed tube (20) formed of a non-magnetic material and having a bottom (21), a movable core (30) slidably received within the bottomed tube (20) and opposed to the fixed core (10) with a gap therebetween, and a solenoid (60) for causing the movable core (30) to operate. The solenoid valve (1) also comprises a protruding portion (25,25') which is formed on the bottom (21) of the bottomed tube (20) and which protrudes in a direction of sliding of the movable core (30). The protruding portion (25,25') may comprise a plurality of convex-shaped protruding portions (25), a ridge-shaped protruding portion (25,25') extending along a whole circumference of the bottom (21) of the tube (20) or a plurality of ridge-shaped protruding portions (25,25') formed at circumferential equal intervals along a circumference of the tube bottom (21). The or each protruding portion (25,25') has a predetermined height.






Search report