Cylindrical filter element

- Pall Corporation
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Description

FIG. 1 is a front elevation view of a cylindrical filter element showing our new design having a continuous spiral parallel bead pattern;

FIG. 2 is a front elevation view of a cylindrical filter element showing a second embodiment of our new design having a continuous spiral parallel bead pattern; and,

FIG. 3 is a front elevation view of a cylindrical filter element showing a third embodiment of our new design having a continuous spiral parallel bead pattern.

The broken line showing of environmental structure in FIGS. 1-3 is for illustrative purposes only and forms no part of the claimed design.

Referenced Cited
U.S. Patent Documents
3241680 March 1966 Humbert, Jr.
3442392 May 1969 Skelley
4402830 September 6, 1983 Pall
5039413 August 13, 1991 Harwood et al.
Foreign Patent Documents
1337170 November 1973 GBX
Patent History
Patent number: D349567
Type: Grant
Filed: Apr 9, 1991
Date of Patent: Aug 9, 1994
Assignee: Pall Corporation (East Hills, NY)
Inventors: John D. Miller (Ithaca, NY), Kenneth M. Williamson (LaFayette, NY)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Lisa Lichtenstein
Law Firm: Leydig, Voit & Mayer
Application Number: 7/682,452
Classifications
Current U.S. Class: Filter (D23/365)