Elliptical sealing surface for butterfly valve

Details Elliptical sealing surface for butterfly valve Elliptical sealing surface for butterfly valve

2007-11-20

2007-11-20

Bastianelli, John (Department: 3753)

Fluid handling

Processes

Cleaning, repairing, or assembling

C251S306000, C277S311000

Reexamination Certificate

active

11421428

ABSTRACT:
A reduced component wear valve is comprised of a valve body having a passage therethrough and a disc attached to a rotatable shaft. The disc is utilized with a seal forming a gap between the disc and the seal proximate to the rotational axis of the disc. When the disc is in the open position, the seal major axis is greater then the disc diameter and they do not touch. As the disc rotates to near closure, the disc perimeter engages the minor axis of the seal (which is smaller than the disc diameter), and the disc stretches the seal in the minor axis direction thus decreasing the major axis such that the gap is closed. The seal can be pre-formed in an elliptical shape or it can be formed into an elliptical shape by a retaining mechanism. The seal may be a single-piece or a multi-piece assembly press-fit into the valve body. Zero or light disc to seal contact during the majority of the valve disc rotation minimizes valve seal wear and rotational friction.

REFERENCES:
patent: 1834988 (1931-12-01), White
patent: 3627261 (1971-12-01), Ludeman
patent: 3642248 (1972-02-01), Benware
patent: 3846885 (1974-11-01), Perry
patent: 3963213 (1976-06-01), Brattberg
patent: 4005848 (1977-02-01), Eggleston
patent: 4058290 (1977-11-01), Nelimarkka
patent: 4176675 (1979-12-01), Liberman
patent: 4181288 (1980-01-01), Bylsma
patent: 4231546 (1980-11-01), Eggleston et al.
patent: 4244387 (1981-01-01), Snape
patent: 4254937 (1981-03-01), Hubertson
patent: 4266753 (1981-05-01), Okada
patent: 4284264 (1981-08-01), Hubertson
patent: 4286769 (1981-09-01), Hubertson
patent: 4289297 (1981-09-01), Nakanishi
patent: 4291863 (1981-09-01), Gachot
patent: 4413393 (1983-11-01), Schils
patent: 4575048 (1986-03-01), Bregman et al.
patent: 4604254 (1986-08-01), Yamamoto et al.
patent: 4659064 (1987-04-01), Scobie et al.
patent: 4711427 (1987-12-01), Holtgraver
patent: 4770393 (1988-09-01), Hubertson
patent: 4967779 (1990-11-01), Scobie
patent: 5152501 (1992-10-01), Raymond, Jr.
patent: 5181690 (1993-01-01), Gonsior
patent: 5535986 (1996-07-01), Hutchens et al.
patent: 6213141 (2001-04-01), Eggleston
patent: 6332600 (2001-12-01), Eggleston
patent: 6390060 (2002-05-01), Schroder
patent: 2001/0005007 (2001-06-01), Eggleston
patent: 2002/0079740 (2002-06-01), Eggleston
patent: 92 00 144 (1992-05-01), None
patent: 2 047 387 (1980-11-01), None
“Metal Seated Neles Zeroleak™ Neldisc® Butterfly Valves, Series L1 & L2,” Metso Automation, Neles 2L 21EN, Issue Sep. 2001.
“Metal Seated Neles Neldisc® Butterfly Valves, Series L9B/L90B,” Metso Automation, Neles 2L9B 20EN, Issue Sep. 2001.
“Metal Seated Neles Neldisc® Butterfly Valves With Flow Balancing Trim,” Metso Automation, Neles 2S-L1 20EN, Issue Sep. 2001.
“Metal Seated Neles Neldisc® Butterfly Valves, Series L12,” Metso Automation, Neles 2L12 20 EN, Issue Jan. 2002.
“Metal Seated Neldisc® Butterfly Valves, Series L6 With Zeroleak Option,” Metso Automation, Neles 2L6 21EN, Issue Feb. 2002.
“Neldisc® Series L15/L25 ANSI Class 150 and 300 Wafer and Lug Ged High-Performance Butterfly Valves,” Metso Automation, Neles 2L15/L25 20, Issue May 2002.
“Metal Seted Neldisc® Butterfly Valves, Series LW, LG, DIN Rated,” Metso Automation, Neles 2LW 20EN, Issue Sep. 2002.
“Metal Seated Neldisc® Butterfly Valves, Series LW, LG, ASME Rated,” Metso Automation, Neles 2LW 21EN, Issue Sep. 2002.
International Search Report for PCT/US03/22858, issued Dec. 16, 2003.
Written Opinion for PCT/US03/22858, mailed May 28, 2004.

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