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US 5,492,143 AGranted
Filter screen and method of making same
AssigneeEaton Corporation
InventorsRobert J. Cooper, Carl E. Behrend
Life of this patent
Estimating the term…
Abstract
A filter for a valve inlet is drawn into a flat-bottomed cup shape from a blank of fine mesh woven screen and formed with an outwardly extending mounting flange of material folded back on itself. The region of the cup-shape proximate the flange is enlarged to a predetermined diameter for closely interfitting the flow passage into which the cup-shaped member is installed.
Claims9
An assembly for filtering flow through a valve comprising:
- (a) valve body structure defining an inlet having a bore with an enlarged diameter region at the upstream end thereof;
- (b) a generally cup-shaped member formed of perforate material disposed in said inlet, said member having:
- (i) an annular flange extending outwardly from the open end of said cup-shape formed of material folded radially inwardly upon itself;
- (ii) a locating region adjacent said flange and sized to closely interfit said bore for locating said member in said inlet;
- (iii) a generally cylindrical region having a diameter significantly less than said bore and a generally flat closed end portion;
- and,
- (c) means retaining said member in said inlet.
4 more elements
A method of making a filter for a flow passage comprising:
- (a) providing a blank of woven screen material;
- (b) drawing said blank to a generally cup-shaped configuration and forming the closed end thereof to a flat-bottomed shape;
- (c) folding the rim of the open end outwardly and inwardly upon itself and forming an outwardly extending flange thereon;
- and,
- (d) inserting said cup-shaped in a bore and locating said cup shape by registering against said flange.
2 more elements
Dependencies are inferred from the claim text.