Title:
ダイヤフラムポンプ
Document Type and Number:
Japanese Patent JP6858020
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a diaphragm pump reducing hammering noise generated when a discharge valve is closed.SOLUTION: A diaphragm pump includes: a disk portion 21 (plate-like body) serving as a portion of a wall of a discharge chamber 41 (discharge passage); a diaphragm 14 serving as a pump chamber 24 and having a deformation portion 23; and a drive mechanism 25 having a drive element 27 (reciprocating portion) mounted to the deformation portion 23. The diaphragm pump further includes: a discharge through hole 33 penetrating through the disk portion 21 to communicate the discharge chamber 41 and the pump chamber 24 with each other; and a rubber discharge valve 43. The discharge valve 43 includes a plate-like valve element section 43c coming into close contact with a wall surface of the disk portion 21 including the discharge chamber 41 side opening of the discharge through hole 33. The diaphragm pump further includes a stopper 45 that is formed of a flexible material and provided in the discharge chamber 41 and that abuts on the valve element portion 43c while the valve element portion 43c (valve element) of the discharge valve 43 is opened only by predetermined amount.SELECTED DRAWING: Figure 2
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Inventors:
Itahara Kazuki
Application Number:
JP2017003072A
Publication Date:
April 14, 2021
Filing Date:
January 12, 2017
Export Citation:
Assignee:
Oken Seiko Co., Ltd.
International Classes:
F04B45/04
Domestic Patent References:
| JP2007009838A | ||||
| JP2004060641A | ||||
| JP57008385U | ||||
| JP2015031154A | ||||
| JP201336349A | ||||
| JP2008248794A |
Attorney, Agent or Firm:
Shigeki Yamakawa
Masaki Yamakawa
Masaki Yamakawa