Ring sealed diaphragm

Details Ring sealed diaphragm Ring sealed diaphragm

2007-12-07

2010-11-16

Lazo, Thomas E (Department: 3745)

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

C251S061000

Reexamination Certificate

active

07832327

ABSTRACT:
A diaphragm actuator for a fluid process control device comprises a housing, a diaphragm, a stem, and a plate assembly. The plate assembly includes a concave plate and a convex plate, each having inner and outer radial portions. The outer radial portions compressingly engage and retain the diaphragm. The inner radial portions are compressed together onto the stem between a shoulder of the stem and a nut threaded onto the stem. Accordingly, the concave plate forcibly engages and provides a fluid-tight seal directly with the shoulder of the stem without requiring an o-ring or any other additional sealing component. Moreover, the concave and convex plates are structurally equivalent such that the actuator may easily be switched between a biased-open configuration and a biased-closed configuration.

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International Search Report for PCT/US2008/084722, mailed Mar. 16, 2009.

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