Title:
NEGATIVE PRESSURE DEVICE
Document Type and Number:
Japanese Patent JP2017007810
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a negative pressure device capable of easily producing negative pressure in a negative pressure space.SOLUTION: A load pump 110 is provided which has a piston 130 sectioning the inside of a cylinder 128 into a first space 132 and a second space 134, and a main connection pipe 123 has one end connected to the first space 132 of the load pump 110 and the other end branched into two. One end of a first check valve 108 is connected to one of branched ends and one end of a second check valve 116 is connected to the other end. The other end of the first check valve 108 is made open to the outside, and the other end of the second check valve 116 is connected to one end of a connection pipe 124, whose other end is connected to a negative pressure tank 114.SELECTED DRAWING: Figure 19
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Inventors:
TSUJI YOSHIO
Application Number:
JP2015124969A
Publication Date:
January 12, 2017
Filing Date:
June 22, 2015
Export Citation:
Assignee:
HIRANO KINZOKU CO LTD
International Classes:
B65H19/18; B65H19/20
Domestic Patent References:
| JPH0791367A | 1995-04-04 | |||
| JPH0447181A | 1992-02-17 | |||
| JP2001055975A | 2001-02-27 | |||
| JP2005105830A | 2005-04-21 |
Attorney, Agent or Firm:
Masato Tsuda
Tetsuji Nakamura
Katsuyuki Tomita
Husband
Ariyoshi Yasuomi
Ryu Maesawa
Tamako Tsutada
Tetsuji Nakamura
Katsuyuki Tomita
Husband
Ariyoshi Yasuomi
Ryu Maesawa
Tamako Tsutada
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