Cylindrical filter element

- Pall Corporation
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Description

FIG. 1 is a front view of a cylindrical filter element showing a first embodiment of our design.

FIG. 2 is a front view of a cylindrical filter element showing a second embodiment of our design.

FIG. 3 is a cross sectional view of a spiral wrap taken along line 3--3 of FIG. 1.

The top and bottom views form no part of the claimed design.

The broken line illustration in the drawings is for illustrative purposes only and forms no part of the claimed design.

Referenced Cited
U.S. Patent Documents
D349567 August 9, 1994 Miller et al.
629377 July 1899 Leland
2426405 August 1947 McDermott
2539450 January 1951 Magill
3241680 March 1966 Humbert Jr.
3442392 May 1969 Skelley
3566607 March 1971 Sixt
4154688 May 15, 1979 Pall
4402830 September 6, 1983 Pall
4882056 November 21, 1989 Degen et al.
4902417 February 20, 1990 Lien
5039413 August 13, 1991 Harwood et al.
5252207 October 12, 1993 Miller et al.
5290457 March 1, 1994 Karbachsch et al.
5543047 August 6, 1996 Stoyell et al.
Foreign Patent Documents
855068 December 1955 GBX
1005987 September 1963 GBX
1337170 December 1971 GBX
Other references
  • "Ultipor Composite Filter Structure", Pall Corporation, 1992.
Patent History
Patent number: D417715
Type: Grant
Filed: Sep 25, 1996
Date of Patent: Dec 14, 1999
Assignee: Pall Corporation (East Hills, NY)
Inventors: John D. Miller (Ithaca, NY), Kenneth M. Williamson (Jamesville, NY)
Primary Examiner: Alan P. Douglas
Assistant Examiner: Robin V. Taylor
Law Firm: Leydig, Voit & Mayer
Application Number: 0/60,233
Classifications
Current U.S. Class: Filter Or Strainer (2) (D23/209)
International Classification: 2301;