Title:
DRY VACUUM PUMP
Document Type and Number:
Japanese Patent JP2003328952
Kind Code:
A
Abstract:
To provide a diaphragm type vacuum pump to be used as a bleeding pump of an absorption refrigerating machine wherein no daily maintenance is required, the running cost is prevented from rising, and no problems concerning waste oil disposal is caused.
A diaphragm 3 of the diaphragm type dry vacuum pump A is a pump head interior copying type diaphragm, and a suction valve mechanism 10 and an exhaust valve mechanism 20 are positioned on the outer surface 2b of a pump head 2. A dead space D thereby becomes remarkably small when the diaphragm 3 reaches the top dead center, improving the ultimate vacuum.
Inventors:
TAKAHASHI SHIGERU
SEKIKAWA ATSUSHI
KANETANI TOSHIHIKO
TAKAHATA SHUZO
SUZUKI KAZUHIKO
TANAKA HIROBUMI
ITOYAMA RYUJI
SEKIKAWA ATSUSHI
KANETANI TOSHIHIKO
TAKAHATA SHUZO
SUZUKI KAZUHIKO
TANAKA HIROBUMI
ITOYAMA RYUJI
Application Number:
JP2002139737A
Publication Date:
November 19, 2003
Filing Date:
May 15, 2002
Export Citation:
Assignee:
TOKYO GAS CO LTD
KAWASAKI THERMAL ENG
ULVAC KIKO INC
KAWASAKI THERMAL ENG
ULVAC KIKO INC
International Classes:
F04B45/04; (IPC1-7): F04B45/04
Attorney, Agent or Firm:
Taro Sogi
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