Slide valve for controlling fluid flow

Details Slide valve for controlling fluid flow Slide valve for controlling fluid flow

1982-09-28

1985-01-15

Rosenthal, Arnold

Valves and valve actuation

With means to increase head and seat contact pressure

Spring

251195, 251327, 251368, 13762518, 13762548, F16K 1106, F16K 3314

Patent

active

044934769

ABSTRACT:
A slide valve for controlling fluid flow, useful especially but not exclusively where high precision and high quality performance are required, as in scientific or medical apparatus and equipment. A valve body, preferably of plastic material, has a channel for receiving a valve slide assembly, the channel providing two surfaces parallel to and spaced from each other. The flow ports to be controlled open onto these two surfaces. The valve slide is an assembly of three members in overlying relation like a sandwich, the outer members or layers being of low-friction plastic material such as "Teflon," the inner or center member being of resilient compressible material (e.g., urethane, or silicone rubber) dimensioned to be under compression when the valve slide is in its channel, so that the resilience of the central layer of the slide serves to keep the outer layers constantly pressed firmly against the body surfaces on which they slide. Ports are formed in the slide assembly. If one port is to be connected to another port, this is done by means of a channel on the inner face of one of the outer members of the slide assembly, so the material flowing through the channel does not come in contact with the valve body. To mount the valve body firmly, a metal nut is provided in the plastic body, held therein by an O-ring seated in an external circumferential groove around the nut and an internal circumferential groove around the recess in which the nut is placed, in the plastic body.

REFERENCES:
patent: 3035809 (1962-05-01), Dickinson
patent: 3150517 (1964-09-01), Kuffer et al.
patent: 3294119 (1966-12-01), Hunt
patent: 3521674 (1970-07-01), Dodson et al.
patent: 4334552 (1982-06-01), Blanchard

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