Control valves

Details Control valves Control valves

2006-10-10

2006-10-10

Keasel, Eric (Department: 3754)

Valves and valve actuation

Mechanical movement actuator

Cam

Reexamination Certificate

active

07118090

ABSTRACT:
A compact, in-line valve assembly consists of a hollow valve body, a seat, and a first diaphragm assembly including a deflectable portion forming a first volume between the seat and the first diaphragm assembly. A second diaphragm is attached to the first diaphragm assembly such that a second volume is defined between the second diaphragm and the second opening. A third volume is formed between the first diaphragm assembly and the second diaphragm and is sealed from the first volume and the second volume. A process flows through the first diaphragm assembly between the first volume and the second volume. A low-leak rate, self-aligning head assembly including a stem and a head coupled are coupled to the first diaphragm assembly. A deflection of the deflectable portion and the second diaphragm provides movement to open and close the head from the valve seat.

REFERENCES:
patent: 2690917 (1954-10-01), Chandler
patent: 2715512 (1955-08-01), Miller et al.
patent: 4667931 (1987-05-01), Egert et al.
patent: 5407173 (1995-04-01), Smith
patent: 6213144 (2001-04-01), Moore
patent: 6244566 (2001-06-01), France et al.
patent: 6679476 (2004-01-01), Noyes et al.

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