Mechanical seal with enhanced face stability

Details Mechanical seal with enhanced face stability Mechanical seal with enhanced face stability

2011-06-14

2011-06-14

Bomar, Shane (Department: 3674)

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

C277S360000

Reexamination Certificate

active

07959156

ABSTRACT:
A seal assembly for use with a rotating shaft comprises a seal ring, a seal ring shell and bellows. The seal ring defines an axially extending annular surface and a radially extending seal face. The seal ring shell includes a foot portion connected to a radially extending shin portion located radially outward of the foot portion. The foot portion defining an axially extending engagement surface in interference-fit engagement with the annular surface of the seal ring. The engagement surface is positioned so as to have a near-zero moment about the center of gravity of the seal ring due to the engagement. The bellows defines an effective diameter at zero pressure applied on the seal ring. The interface of the foot portion with the seal ring defines an interference diameter.

REFERENCES:
patent: 2941825 (1960-06-01), Heinrich
patent: 3131941 (1964-05-01), Donley
patent: 3560004 (1971-02-01), Donley et al.
patent: 3765689 (1973-10-01), Adams
patent: 4169603 (1979-10-01), Funk
patent: 4261581 (1981-04-01), Hershey
patent: 4335888 (1982-06-01), Ohba et al.
patent: 4364571 (1982-12-01), Hershey
patent: 4365816 (1982-12-01), Johnson et al.
patent: 4744569 (1988-05-01), Wentworth, Jr.
patent: 4889350 (1989-12-01), Tranter
patent: 4971337 (1990-11-01), Hufford
patent: 5042824 (1991-08-01), Gardner et al.
patent: 5901965 (1999-05-01), Ringer et al.
patent: 5954341 (1999-09-01), Ringer et al.
patent: 6113106 (2000-09-01), Dahlheimer
patent: 6299173 (2001-10-01), Lai
patent: 6464231 (2002-10-01), Burroughs
patent: 2004/0212154 (2004-10-01), Yada et al.
Form PCT/ISA/206, PCT Invitation to Pay Additional Fees, Dated Jul. 4, 2008, International Application No. PCT/US2007/063576.
Form PCT/ISA/237, PCT Written Opinion of the International Search Authority, International Application No. PCT/US2007/063576.
Form PCT/ISA/210, PCT International Search Report, International Application No. PCT/US2007/063576.
John Crane Presentation Materials, entitled “John Crane Belfab Sealing Systems” (1996).
John Crane Introduction Information for Type 215, 315, 715, 15WRS Metal Bellows Product (1986).

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