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Title:
PUMP WITH EXHAUST MECHANISM
Document Type and Number:
Japanese Patent JP2015078649
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce noise generated when air is exhausted from a pump chamber.SOLUTION: A pump with an exhaust mechanism includes: a partition plate 230 provided at an upper part of a pump portion, and having a discharge hole 233 communicating with a pump chamber 235; a discharging valve body 260 opened at a tip end portion, and provided corresponding to the discharge hole 233 having a U-shaped valve 260b of a U-shaped cross section; and a cover body 240 which has a discharge port 242 a discharging strut 246 provided corresponding to the discharge hole 233 and the U-shaped valve 260b and communicating with the discharge hole 233, seals the pump chamber 235 by the U-shaped valve 260b abutting on the discharging strut 246 when the discharging strut 246 is inserted in the discharge hole 233, and exhausts a fluid in the pump chamber 235 from the discharge port 242 when the tip-end portion of the U-shaped valve 260b is separated from the discharging strut 246. The discharging strut 246 of the cover body 240 has a peripheral surface portion which has a straight line shape along a direction of the fluid flowing from the pump chamber 235, and a tapered portion formed in a tapered shape at a tip end.

Inventors:
SHIMIZU TAKEHITO
Application Number:
JP2013216250A
Publication Date:
April 23, 2015
Filing Date:
October 17, 2013
Export Citation:
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Assignee:
OKEN LTD
International Classes:
F04B45/04; F04B39/10
Domestic Patent References:
JPH0330585U1991-03-26
JPS281062Y1
Attorney, Agent or Firm:
山川 政樹
山川 茂樹