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US 4,887,516 AGranted
Clamping arrangement for diaphragm piston assembly
AssigneeAmerican Standard Inc.
InventorsDaniel G. Scott, Theodore B. Hill
Life of this patent
Estimating the term…
Abstract
A diaphragm clamping arrangement for assembly of a diaphragm-type piston in the body of a valve device or the like such that the diaphragm is biased in a direction to cause the diaphragm convolution to assume a preferred disposition in which a desired diaphragm "spring effect" is maintained.
Claims9
A diaphragm clamping arrangement for mounting a diaphragm piston in a valve body comprising:
- (a) a fluid pressure operated piston member disposed in said valve body with an annular space therebetween for axial movement in opposite directions to an application position and a release position;
- (b) an annular diaphragm member fixed at its inner periphery to said piston member;
- (c) said body including first and second sections between which the outer periphery of said diaphragm is clamped;
- (d) first and second pressure chambers formed between said diaphragm piston and said first body section and between said diaphragm piston and said second body section respectively;
- (e) a convolution of said diaphragm formed in said annular space, said convolution having a preferred direction of formation in which said convolution is disposed when said piston member is moved toward said application position in response to a first pressure differential between said first and second pressure chambers, said convolution being inverted from said preferred direction of formation when said piston member is moved toward said release position in response to a second pressure differential between said first and second chambers;
- (f) said first section including:
- (i) a first clamping face;
- (ii) an annular clamping groove recessed in said first clamping face in which said outer periphery of said diaphragm member is contained;
- and
- (iii) a first annular clamping bead projecting from said clamping groove;
- and
- (g) said second section including:
- (i) a second clamping face adjoining said first clamping face;
- and
- (ii) an annular bevel surface of said second clamping face spaced opposite said first annular clamping bead such that said diaphragm adjacent said outer periphery is forced by said first clamping bead into engagement with said bevel surface, said bevel surface being inclined in a direction corresponding to said preferred direction of formation of said convolution.
12 more elements
Dependencies are inferred from the claim text.