Check valve

Details Check valve Check valve

2007-07-03

2010-11-30

Hepperle, Stephen (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S516250

Reexamination Certificate

active

07841359

ABSTRACT:
A check valve assembly with an extended operational life. The check valve assembly includes a poppet with conically shaped arms and planar seating surfaces. The planar seating surfaces conform to seating surfaces in the valve assembly. The poppet moves back and forth between two operative positions. In each operative position, a planar seating surface on the poppet sealingly conforms to another planar sealing surface in the check valve assembly. The use of planar seating surfaces extends the operational life of the check valve assembly. The aerodynamic shape of the conically shaped arms facilitates fluid flow over the poppet and, when fluid flows over the poppet, generates forces that function to minimize movement of the poppet and to maintain the poppet in a desired orientation when the poppet moves from one operative position to another operative position.

REFERENCES:
patent: 442284 (1890-12-01), Craig et al.
patent: 1072673 (1913-09-01), Thelen
patent: 1776060 (1930-09-01), Beckwith
patent: 3958603 (1976-05-01), Bannon et al.
patent: 5819785 (1998-10-01), Bardini

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