Roll diaphragm control valve

Details Roll diaphragm control valve Roll diaphragm control valve

2005-12-20

2005-12-20

Look, Edward K. (Department: 3751)

Valves and valve actuation

Reciprocating valve

Diaphragm

C251S335200, C137S529000, C285S414000

Reexamination Certificate

active

06976668

ABSTRACT:
The present invention provides an improved diaphragm control valve with a simplified construction that has significant advantages over prior art diaphragm control valves. Further, the present invention provides substantially straight-through fluid flow which enables a high flow capacity with minimal pressure loss. The non-planar diaphragm of the present invention, when standing in a non-stressed state, is substantially an annulus that assumes a shape with a cross section that extends from a first attachment bead substantially radially in a first direction through a first curve continues substantially non-radially in a second direction through a second curve and continues in a substantially radial direction terminating in a second attachment bead, such that the diaphragm does not fold back on itself. That is to say, the diaphragm is both axially non-overlapping and rotationally symmetrical.

REFERENCES:
patent: 3336843 (1967-08-01), Griswold
patent: 3477748 (1969-11-01), Tinsley
patent: 4951554 (1990-08-01), Scott et al.
patent: 5002086 (1991-03-01), Linder et al.
patent: 6216731 (2001-04-01), Frenkel
patent: 6601604 (2003-08-01), Cooper

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