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Patent Searching and Data


Title:
VACUUM PUMP
Document Type and Number:
Japanese Patent JP3285034
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a vacuum pump to easily work in a short period of time while restraining, a bad influence on an environment at the time of constructing an air conditioner.
SOLUTION: The vacuum pump makes an air intake port side in a negative pressure state while differential pressure of two chambers gradually damps from initial movable time by dividing the inside of a cylinder into the two chambers by a piston, providing the two divided chambers with suction ports and discharge ports respectively furnished with valve systems, connecting the respective suction ports to each other and actuating the piston in both directions.


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Inventors:
Numamoto, Hironao
Nishida, Junichi
Application Number:
JP2001000305036
Publication Date:
March 08, 2002
Filing Date:
October 29, 1999
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
F04B33/00; F04B37/00; F25B45/00; (IPC1-7): F04B33/00; F04B37/00