Title:
CHECK VALVE STRUCTURE
Document Type and Number:
Japanese Patent JP3421828
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make assembling workability excellent, and eliminate a fear of swelling due to fuel by letting a first valve at the apex part of which a communication hole is formed, be fitted so as to be in contact with a first valve seat formed in the inside of a first body, and also letting a valve body be energized to the direction of the first valve seat by a first spring.
SOLUTION: When the internal pressure of a fuel tank is increased, the whole of a valve element 15 is moved to the direction of a connecting pipe 14 at the time when the difference in pressure between the side of a first and a second connecting pipe 11 and 12 and the side of the connecting pipe 14 overcomes the energizing force of a first spring 16, and a first valve 20 is parted from a first valve seat 13 so as to be in an open condition, so that a first passage is thereby opened. By this constitution, pressure is thereby set free to the side of a canister from the fuel tank through the connecting pipes 11 and 12, the first passage 26 and the connecting pipe 14, and vaporized fuel is also sent to the canister. When the internal pressure of the fuel tank is decreased, a second valve 23 is moved to the direction of the first valve 20 at the time when the difference in pressure between the side of the first and second connecting pipes 11 and 12 and the side of the connecting pipe 14 overcomes the energizing force of a second spring 24.
Inventors:
Harumitsu Sugiyama
Yoshikazu Kitamura
Hiroki Isobe
Yoshikazu Kitamura
Hiroki Isobe
Application Number:
JP23349095A
Publication Date:
June 30, 2003
Filing Date:
August 19, 1995
Export Citation:
Assignee:
Piolux Co., Ltd.
Nissan Motor Co., Ltd
Nissan Motor Co., Ltd
International Classes:
B60K15/077; F16K17/18; (IPC1-7): F16K17/18
Domestic Patent References:
| JP53132029U | ||||
| JP386203U | ||||
| JP653869U | ||||
| JP640539U |
Attorney, Agent or Firm:
Shunichiro Ichihashi