(19)
(11) EP 2 388 541 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.04.2015 Bulletin 2015/18

(43) Date of publication A2:
23.11.2011 Bulletin 2011/47

(21) Application number: 11154126.4

(22) Date of filing: 11.02.2011
(51) International Patent Classification (IPC): 
F25B 41/04(2006.01)
 F16K 11/056(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 17.05.2010 JP 2010112976

(71) Applicant: Kabushiki Kaisha Saginomiya Seisakusho
Tokyo 165-0033 (JP)

(72) Inventor:
  • Murata, Masahiro
    Saitama 350-1395 (JP)

(74) Representative: Viering, Jentschura & Partner Patent- und Rechtsanwälte 
Grillparzerstrasse 14
81675 München
81675 München (DE)

   


(54) Flow path switching valve


(57) A pressure equalizing path is provided in the center of the piston 2, and a sub valve 25 is disposed in the pressure equalizing path. When the piston 2 is moved toward a cap 12, the sub valve 25 closes an opening of an exhaust path 12a at a sub valve seat, and opens the pressure equalizing path.







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Search report