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Title:
AIRTIGHT CONTAINER AND VACUUM PUMP
Document Type and Number:
Japanese Patent JP2011185224
Kind Code:
A
Abstract:

To provide a highly airtight container and a vacuum pump at a low cost.

When forming a cylindrical casing body by assembling a plurality of casing parts, a string-like elastic member 21 is arranged between the casing parts to press the casing parts against each other. The string-like elastic member 21 projected from between the casing parts is accommodated in an accommodation hole 12 of an annular elastic member 22 arranged on an end of the casing body, first and second bottom plates are arranged thereon, and the first and second bottom plates are pressed against the casing body to constitute an airtight container. When the string-like elastic member 21 is pressed and is increased in length, the position of a fore end of the string-like elastic member 21 can be adjusted within the accommodation hole 12, preventing the airtightness from being degraded. A vacuum pump can be obtained when an exhaust space is arranged within the airtight container.


Inventors:
Nakanishi, Hidefumi
Tateno, Shunichi
Application Number:
JP2010000053800
Publication Date:
September 22, 2011
Filing Date:
March 10, 2010
Export Citation:
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Assignee:
ULVAC JAPAN LTD
International Classes:
F04B37/16; F04C27/00
Domestic Patent References:
JP2004507641A
Attorney, Agent or Firm:
石島 茂男
阿部 英樹