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US 4,732,363 AGranted
Diaphragm valve
AssigneeNupro Company
InventorsTerrence J. Kolenc, Gary W. Scheffel
Life of this patent
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Abstract
A diaphragm valve which uses a multiple annular metal diaphragm welded about its inner periphery to a valve operating stem. The diaphragm is sealingly clamped about its outer periphery to the valve body and is also clamped about its inner periphery at a location spaced outwardly of the weld to prevent the weld from being subjected to flexure stresses during valve actuation. The actuating assembly is arranged to produce non-rotary, reciprocatory movement of the operating stem through a bonnet mounted rotary actuator. An improved stem tip seal arrangement is also disclosed.
Claims6
A fluid control device comprising:
- a body defining a generally cylindrical chamber which opens to the exterior of said body;
- an operating stem extending axially into said chamber from the exterior of said body;
- a diaphragm comprising a plurality of generally annular shaped thin metal disk members positioned in juxtaposed relationship to extend across said chamber with said stem member extending outwardly therethrough;
- a first circumferentially continuous weld joining outer peripheral portions of said disk members to each other and to said body;
- a second circumferentially continuous weld joining inner peripheral portions of said disk members to each other and to said stem;
- and,
- first and second radially spaced clamp means respectively clamping said diaphragm to said body and to said stem at locations radially between said first and second welds.
4 more elements
Dependencies are inferred from the claim text.