Title:
圧力バランス取りピストンを備える弁およびそれに関わる方法
Document Type and Number:
Japanese Patent JP4485781
Kind Code:
B2
Abstract:
A valve assembly (10) is disclosed that provides for complete or partial fluid pressure balancing across the valve, and can be used for reducing valve actuation forces in order to employ electric actuation. The valve assembly (10) includes a valve housing (20) having a valve chamber, a flow passageway (28), and a piston chamber. A valve member (34) is disposed in the valve housing (20) and is movable along a valve axis (36). The valve member (34) is subjected to a first pressure, which urges the valve in a first direction. To counteract this force, a piston integral with the valve member is slidably arranged in the piston chamber. One side of the piston is subjected to this first pressure to provide a counterbalancing force. A pressure passage fluid communication (48) of the first pressure between the flow passageway (28) and said one side of the piston.
Inventors:
Jeff A. Gesaman
Application Number:
JP2003371325A
Publication Date:
June 23, 2010
Filing Date:
October 30, 2003
Export Citation:
Assignee:
Woodward Governor Company
International Classes:
F01D25/00; F16K1/52; F02C7/232; F16K1/00; F16K1/32; F16K17/04; F16K31/06; F16K39/02
Domestic Patent References:
| JP60023364U | ||||
| JP60127173U | ||||
| JP46031673Y1 | ||||
| JP60175886A | ||||
| JP60205083A |
Foreign References:
| US5386965 | ||||
| US3318577 | ||||
| US4341370 | ||||
| US2897836 |
Attorney, Agent or Firm:
Sadaji Miyakawa
Tadao Naito
Kiyoshi Miyakawa
Hiroyuki Matsumura
Hirofumi Higashino
Shigeo Shibata
Tadao Naito
Kiyoshi Miyakawa
Hiroyuki Matsumura
Hirofumi Higashino
Shigeo Shibata