Elliptical sealing surface for butterfly valve

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

2007-10-03

2008-08-26

Bastianelli, John (Department: 3753)

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

C251S306000, C251S361000

Reexamination Certificate

active

07416164

ABSTRACT:
A reduced component wear valve is comprised of a valve body having a passage therethrough and a disc attached to a rotatable shafts. 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 preformed 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: 3025035 (1962-03-01), Edward
patent: 3325142 (1967-06-01), Thompson
patent: 4005848 (1977-02-01), Eggleston
patent: 4194749 (1980-03-01), Bonafous
patent: 4399976 (1983-08-01), Legris
patent: 4505290 (1985-03-01), Scobie
patent: 4508315 (1985-04-01), Livorsi et al.
patent: 5178364 (1993-01-01), Garrigues et al.
patent: 5249774 (1993-10-01), Mazel et al.
patent: 5685520 (1997-11-01), Velan
patent: 5934647 (1999-08-01), Marbach
patent: 6131882 (2000-10-01), Suzuki
patent: 6142173 (2000-11-01), Bekeredjian et al.

Affiliated with

Also associated with

Rating

Elliptical sealing surface for butterfly valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Elliptical sealing surface for butterfly valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elliptical sealing surface for butterfly valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4013268