Title:
過流防止機能付き弁装置
Document Type and Number:
Japanese Patent JP5894558
Kind Code:
B2
Abstract:
A valve device includes: a main valve element arranged so as to divide a valve element space of a housing into a first pressure chamber and a second pressure chamber; and a pilot valve element arranged in the second pressure chamber. A first pilot passage including a first restrictor extends from an outside of the housing or the primary passage to the second pressure chamber, and a second pilot passage including a second restrictor is formed at the main valve element. The pilot valve element is biased by a biasing member to close an upstream end of the second pilot passage. When electric power is supplied to a drive unit, the pilot valve element opens the upstream end of the second pilot passage. An excess flow prevention valve including a third restrictor is provided at the second pilot passage so as to be located downstream of the second restrictor.
Inventors:
Kaoru Nomichi
Makoto Ninomiya
Tadahiko Kuroda
Yutaka Suzuki
Makoto Ninomiya
Tadahiko Kuroda
Yutaka Suzuki
Application Number:
JP2013092403A
Publication Date:
March 30, 2016
Filing Date:
April 25, 2013
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
F16K31/10; F16K17/34; F17C13/04
Domestic Patent References:
| JP2004515717A | ||||
| JP2005291411A | ||||
| JP2005140195A | ||||
| JP587262A | ||||
| JP2007278484A |
Foreign References:
| US6957661 | ||||
| US2830743 | ||||
| US3930518 |
Attorney, Agent or Firm:
Patent business corporation Yuko patent office