Valve cover

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Description

FIG. 1 is a perspective view of a valve cover showing our new design. The broken line showing of FIG. 1 is for illustrative purposes only and forms no part of the claimed design; it being understood that filtering face masks of other configurations may be used in conjunction with the valve cover of this invention;

FIG. 2 is a top view thereof;

FIG. 3 is a left side elevational view thereof; the right side elevational view being the same;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D294410 February 23, 1988 Montest
2751904 June 1956 Lewis
4756308 July 12, 1988 Ryback
4827924 May 9, 1989 Japuntich
4838262 June 13, 1989 Katz
4958633 September 25, 1990 Angell
Foreign Patent Documents
72499 May 1993 CAX
Other references
  • 3M product literature for Particulate Respirators (Apr. 1990). 3M product literature for Gas and Vapor Respirators (Jun. 1990).
Patent History
Patent number: D347299
Type: Grant
Filed: Oct 13, 1992
Date of Patent: May 24, 1994
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Inventors: John W. Bryant (High Shincliffe), Alan G. Kellett (Woodham Village), Richard A. Lees (Durham City), Daniel A. Japuntich (St. Paul, MN), David C. Byram (River Falls, WI)
Primary Examiner: Kay H. Chin
Attorneys: Gary L. Griswold, Walter N. Kirn, Karl G. Hanson
Application Number: 0/384
Classifications
Current U.S. Class: D29/7