Title:
PUMP DEVICE
Document Type and Number:
Japanese Patent JP2017057795
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pump device capable of preventing inching.SOLUTION: A metallic ball 52 is supported to be lightly kept into contact with a metallic ball receiver 56A by a supporting spring 54 when water flow does not exist in stopping of a pump. When the pump is started and the water flow generates, the metallic ball 52 is brought into contact with the metallic ball receiver 56A, thus transmission of pressure to a pressure switch 60 is blocked, and detection of the pressure by the pressure switch is disturbed for a while. Then the water gradually flows to a pressure switch side through a coarsened surface of the metallic ball 52, and the detection by the pressure switch 60 is enabled after a delay time of several ten seconds.SELECTED DRAWING: Figure 6
Inventors:
SAHASHI MIKIO
KATO MUTSUMI
HIRAI TAKAHIRO
KATO MUTSUMI
HIRAI TAKAHIRO
Application Number:
JP2015183302A
Publication Date:
March 23, 2017
Filing Date:
September 16, 2015
Export Citation:
Assignee:
YAMADA ELECTRIC MFG CO LTD
International Classes:
F04B49/22; H01H35/34
Attorney, Agent or Firm:
Akito Tashita