Title:
METAL BELLOWS ACCUMULATOR
Document Type and Number:
WIPO Patent Application WO/2007/083471
Kind Code:
A1
Abstract:
A metal bellows accumulator having a metal bellows that is fixed at one end in a
shell and joined at the other end to a bellows cap, thereby partitioning the inside
of the shell into an outer gas chamber and an inner liquid chamber. Even if a seal
function of a seal section becomes ineffective to cause a pressurized liquid
remaining in the liquid chamber to be lost, no breakage of the accumulator by abnormal
deformation occurs. To achieve this, the bellows is constructed such that, when
the pressure in the liquid chamber (12) is further reduced after the bellows cap
(31) is in contact with an oil port (4), a surface contact section (35) is formed
on the metal bellows (3) and the curvature radius of a U-shaped section (3A) of
a crest (32) on the outer diameter side is reduced. Also, the curvature radius
of a U-shaped section (3A) of a root (33) on the inner diameter side is increased.
Inventors:
MIYAKE KUNIAKI (JP)
SASAKI KENJI (JP)
SASAKI KENJI (JP)
Application Number:
PCT/JP2006/325325
Publication Date:
July 26, 2007
Filing Date:
December 20, 2006
Export Citation:
Assignee:
NOK CORP (JP)
MIYAKE KUNIAKI (JP)
SASAKI KENJI (JP)
MIYAKE KUNIAKI (JP)
SASAKI KENJI (JP)
International Classes:
F15B1/08; F16J3/04
Foreign References:
| JPH1019001A | 1998-01-20 | |||
| JPH03244874A | 1991-10-31 | |||
| JP2005240834A | 2005-09-08 | |||
| JPH11226658A | 1999-08-24 | |||
| FR2703124A1 | 1994-09-30 | |||
| DE10305000A1 | 2004-08-26 | |||
| JP2003343501A | 2003-12-03 | |||
| JP2004108511A | 2004-04-08 |
Other References:
See also references of EP 1975417A4
Attorney, Agent or Firm:
NOMOTO, Yoichi (Terao Building 8-4, Nishi-Shinbashi 2-chom, Minato-ku Tokyo 03, JP)
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