Title:
【発明の名称】負圧カットバルブの構造
Document Type and Number:
Japanese Patent JP3091947
Kind Code:
B2
Abstract:
A negative pressure cut valve disposed between a feed pipe and a forward pipe includes a main body having a first outer wall and a second outer wall, an urging spring provided on the first outer wall, a diaphragm provided on the main body and actuated by the relative action of the force of the urging spring and the inner pressure on the feed pipe side to produce an opening action in the state in which the inner pressure on the feed pipe side rises is above the inner pressure on the forward pipe side and a closing action in the other pressure state, and a valve provided on the main body and actuated to produce an opening action in the state in which the inner pressure on the feed pipe side falls below the inner pressure on the forward pipe side and a closing action in the other pressure state. The first outer wall has a first atmospheric vent formed therein. The second outer wall is disposed around the periphery of the first atmospheric vent and enabled jointly with the first outer wall to define an empty space for precluding intrusion of extraneous substances. The empty space has a capacity at least above an operating capacity of the diaphragm. The second outer wall has a second atmospheric vent formed therein and endowed with a function of releasing pressure and a function of discharging water.
Inventors:
Koichi Kato
Harumitsu Sugiyama
Shinichi Matsuo
Nobuhiro Hirata
Taiki Aoyama
Harumitsu Sugiyama
Shinichi Matsuo
Nobuhiro Hirata
Taiki Aoyama
Application Number:
JP32146994A
Publication Date:
September 25, 2000
Filing Date:
November 30, 1994
Export Citation:
Assignee:
Piolux Co., Ltd.
Nissan Motor Co., Ltd
Nissan Motor Co., Ltd
International Classes:
B60K15/077; B60K15/035; F02M25/08; F02M37/00; F16K7/17; F16K51/00; (IPC1-7): F02M37/00; B60K15/077; F16K7/17; F16K51/00
Domestic Patent References:
| JP62629A | ||||
| JP6323204A | ||||
| JP667854U |
Attorney, Agent or Firm:
Shunichiro Ichihashi