METHOD FOR FASTENING SEAL WASHER AND FLUID PIPE FLANGE

Japanese Patent JP2016095029

A

PROBLEM TO BE SOLVED: To provide a seal washer capable of restricting a removal of a seal surface from a bolt hole peripheral edge location without making a large-sized diameter of the seal washer.SOLUTION: A seal washer 1 is present between seat surfaces 20 and 30 of a bolt 2 or a nut 3 and a flange part 40 of a water service pipe 4, and is used for tightly sealing a bolt hole 40s formed at the flange part 40. The seal washer 1 includes: an annular seal member 10 in which a seal surface 10f for tightly contacting with a bolt hole peripheral edge location 40f is set at an end part becoming a flange part, formed by elastic member and having an insertion hole 10s for inserting a bolt shaft 21; and a frame member 11 harder than the seal member 10. The peripheral edge part of the insertion hole 10s of the seal member 10 is provided with a fin 12 that protrudes from the seal surface 10f in an axial direction under its natural state having no external force acted thereon and that can be inserted into a clearance between the bolt hole 40s and the bolt shaft part 21.SELECTED DRAWING: Figure 2

JPH0730976	[Name of device] Embedded washer
JP4856132	Fastening structure

TOTSUGI HIROYUKI

JP2015249379A

May 26, 2016

December 22, 2015

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WATERWORKS TECH DEV ORGANIZATION CO LTD

F16B43/00; F16J15/10; F16L23/036

JP2007063908A	2007-03-15
JPS60110708U	1985-07-27
JPS5640217U	1981-04-14
JPS6117516U	1986-02-01

US4230326A

1980-10-28

Patent Business Corporation Unias International Patent Office

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