Seal for a joint or juncture – Seal between relatively movable parts – Circumferential contact seal for other than piston
Patent
1998-03-26
2000-07-04
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Circumferential contact seal for other than piston
277528, 277535, 277610, F16J 1512
Patent
active
060827394
ABSTRACT:
The present invention relates to a gland packing which is made of a material configured by laminating an expanded graphite tape into a spiral shape by winding. The gland packing can prevent penetration leakage through minute gaps existing in the laminated parts, from occurring, can be sufficiently deformed so as to exhibit sure sealing properties even at a low tightening force, and has properties which result in a small amount of wear so as to ensure high sealing properties, so that high sealing performance can be maintained for a long term. In the gland packing, circumferentially projected parts are disposed on end faces of a die mold packing part made of an expanded graphite tape laminated into a spiral shape so as to be integrated with the part. Ring-like seal members are brought into tight contact with the end faces of the die mold packing part excluding the circumferentially projected parts in such a manner that the circumferentially projected parts project in an axial direction beyond the outer faces of the respective ring-like seal members.
REFERENCES:
patent: 1932809 (1933-10-01), Wheeler
patent: 3179426 (1965-04-01), Duer
patent: 4363465 (1982-12-01), Morrill
patent: 4394023 (1983-07-01), Hinojosa
patent: 4451047 (1984-05-01), Herd et al.
patent: 5411274 (1995-05-01), Yahagi et al.
patent: 5806858 (1998-09-01), Harrelson, III
Fujiwara Masaru
Ueda Takahisa
DePumpo Daniel G.
Nippon Pillar Packing Co. Ltd.
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