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US 4,968,423 AGranted
Filter leaf
AssigneeThe Duriron Company, Inc.
InventorsGary W. McKale, Anthony F. McGowan
Life of this patent
Estimating the term…
Abstract
A filter leaf having a drainage member which is fabricated by combining a plurality of preforated and texturized sheets into a sandwich structure. The drainage member is covered in both sides by a pair of surface screens, and the entire assembly is secured together by a suitable frame.
Claims8
A filter leaf comprising:
- a pair of opposed and parallel fine mesh surface screens of like shape and size;
- a drainage member sandwiched supportingly between said surface screens,
- a frame member surrounding and securing said surface screens and said drainage member, and
- an outlet fitting for receiving a flow of filtrate from said drainage member;
- said drainage member comprising a plurality of sheets each of which have been perforated and thereafter texturized;
- said sheets being of like size and shape as said surface screens and being secured in non-conforming contact.
3 more elements
Dependencies are inferred from the claim text.