Diaphragm valve and method

Details Diaphragm valve and method Diaphragm valve and method

1981-08-24

1983-11-08

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

251331, 251DIG2, F16K 1102

Patent

active

044136510

ABSTRACT:
A method and a valve are provided for opening or closing fluid flow through an annular conduit by the utilization of a flexible diaphragm. Such diaphragm is preferably of annular configuration and has an annular U-shaped portion disposed in the annular fluid conduit. The outer portions of the diaphragm are secured to the outer member defining the annular fluid conduit and the inner portions of the flexible diaphragm are secured to the inner member defining the annular conduit. The annular U-shaped portion contains at least one aperture which is rolled into and out of sealing engagement with either the inner or outer wall of the annular fluid conduit by limited axial movement of one wall relative to the other. In a modification of the invention, a second such diaphragm is employed to provide an opening or closing of a bleed passage for the fluid outlet.

REFERENCES:
patent: 2720378 (1955-10-01), Otto
patent: 3208721 (1965-09-01), McHugh
patent: 3547157 (1970-12-01), Jacklin
patent: 3766933 (1973-10-01), Nicholson
patent: 3799193 (1974-03-01), Greenwood

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