ACCUMULATOR USING INTERNAL AND EXTERNAL THREADS

Title:

ACCUMULATOR USING INTERNAL AND EXTERNAL THREADS

Document Type and Number:

WIPO Patent Application WO/2004/048785

Kind Code:

A1

Abstract:

An accumulator (ACC) in which a container main body (1) and a closure member (5) are screw−joined together. A reverse−buttress internal thread or an internal thread having an included angle of 90 degrees is used as an internal thread of the screw−joined portion. The reverse−buttress internal thread is formed in such a way that the inclination angle (β) of a clearance flank of the buttress internal thread is the inclination angle (β) of a reverse pressure flank (20A) receiving a load, and the inclination angle (Ѳ) of a pressure flank is the inclination angle (Ѳ) of a reverse clearance flank (2B). The internal thread having an included angle of 90 degrees is formed in such a way that inclination angles (&agr ), (&gammad ) of both flanks are equal and the included angle (&dgr ) is about 90 degrees.

Inventors:

SUGIMURA NOBUYUKI (JP)
WADA YASUMICHI (JP)

Application Number:

PCT/JP2002/012239

Publication Date:

June 10, 2004

Filing Date:

November 22, 2002

Export Citation:

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Assignee:

SUGIMURA NOBUYUKI (JP)
NIPPON ACCUMULATOR KK (JP)
WADA YASUMICHI (JP)

International Classes:

F15B1/04; F15B1/10; F15B1/16; F16B33/02; F16B33/04; F16L15/06; (IPC1-7): F15B1/04; F16B33/04

Foreign References:

US4958973A	1990-09-25
JPH08177831A	1996-07-12
JPS4958263A	1974-06-06
JPS53138603U	1978-11-02
JP2000035196A	2000-02-02

Other References: