Title:
マイクロポンプ用漏出防止弁
Document Type and Number:
Japanese Patent JP6643845
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent leakage of discharge fluid from a pump to improve metering accuracy of discharge fluid.SOLUTION: A leakage prevention valve 40 for pump is connected to a discharge side of a pump 10 including a suction valve and a discharge valve respectively comprising check valves 24, 26, and prevents leakage of discharge fluid, the check valves communicating with a pump chamber 22 in normal and reverse directions. The leakage prevention valve includes: an expansible rubber film 46 in which a wall thickness part 46A formed integrally with a peripheral edge is held between split surfaces 44 of a valve case 42 and tension in a tension direction is imparted to a film surface 46B; a valve seat 54 opposite to one film surface of the rubber film 46 and configured to open/close by the rubber film 46; a pump inflow pressure chamber 48 configured to guide pump inflow pressure P1 to the other film surface of the rubber film 46 and press the rubber film 46 to the valve seat 54 side; and a valve side outflow passage 58 configured to guide pump discharge fluid to outside through the valve seat 54.SELECTED DRAWING: Figure 8
Inventors:
Haruo Ono
Yoshifumi Mori
Yoshifumi Mori
Application Number:
JP2015185069A
Publication Date:
February 12, 2020
Filing Date:
September 18, 2015
Export Citation:
Assignee:
Kikuchi Manufacturing Co., Ltd.
International Classes:
F16K7/17; F04B43/04; F04B45/04
Domestic Patent References:
| JP2014066364A | ||||
| JP64051781U | ||||
| JP63198488U |
Attorney, Agent or Firm:
Fumio Yamada
Yousuke Yamada
Yousuke Yamada