HERMETICALLY SEALED ARTIFICIAL LEG

Title:

HERMETICALLY SEALED ARTIFICIAL LEG

Document Type and Number:

WIPO Patent Application WO/2014/033876

Kind Code:

A1

Abstract:

The present invention is a technique for hermetically sealing an artificial leg including a cylinder device. A shell structure surrounds the outside of the cylinder device. The cylinder device is not entirely received within the shell structure, but a rod member extends to the outside of the shell structure from the cylinder body within the shell structure and a part of the rod member is located outside the shell structure. In this invention, the rod member, which extends from the inside to the outside of the shell structure, is hermetically sealed at the periphery thereof by a bellows packing means. The bellows packing means comprises: an inner bead; an outer bead which concentrically surrounds the outside of the inner bead; and a bellows packing body which connects the inner and outer beads. The bellows packing body includes corrugations, and each of the corrugations is less curved than an imaginary circle between the outer bead and the inner bead and is configured in such a manner that both ends of the corrugation reach the outer bead or are located at positions closer to the outer bead than the inner bead.

Inventors:

NAKAYA YOSHIAKI (JP)
MISAO TAISHIRO (JP)
HASHIMOTO HIROAKI (JP)
NAKAMURA NOBUYUKI (JP)
TADA YOSHIHIRO (JP)

Application Number:

PCT/JP2012/072029

Publication Date:

March 06, 2014

Filing Date:

August 30, 2012

Export Citation:

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Assignee:

NABTESCO CORP (JP)
NAKAYA YOSHIAKI (JP)
MISAO TAISHIRO (JP)
HASHIMOTO HIROAKI (JP)
NAKAMURA NOBUYUKI (JP)
TADA YOSHIHIRO (JP)

International Classes:

A61F2/64

Foreign References:

JP2001137268A	2001-05-22
JPH07308332A	1995-11-28
US5948021A	1999-09-07
JP2001137268A	2001-05-22
JP2002058689A	2002-02-26
JPS5513065A	1980-01-29
JP2010075727A	2010-04-08

Other References: