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 rear elevational view thereof; and,

FIG. 6 is a front elevational view thereof.

Referenced Cited
Other references
  • 3M product literature for Particulate Respirators (Apr. 1990). 3M product literature for Gas and Vapor Respirators (Jun. 1990).
Patent History
Patent number: D347298
Type: Grant
Filed: Oct 13, 1992
Date of Patent: May 24, 1994
Assignee: Minnesota Mining and Manufacturing company (St. Paul, MN)
Inventors: Daniel A. Japuntich (St. Paul, MN), David C. Byram (River Falls, WI), James E. Steffen (Woodbury, MN)
Primary Examiner: Kay H. Chin
Attorneys: Gary L. Griswold, Walter N. Kirn, Karl G. Hanson
Application Number: 0/382
Classifications
Current U.S. Class: D29/7