Differential pressure indicator

- Wilkerson Corporation
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Description

FIG. 1 is a top, front and right side perspective view of a differential pressure indicator showing our new design;

FIG. 2 is a bottom, rear and left side perspective view;

FIG. 3 is a top plan view;

FIG. 4 is a right side elevational view, the left side elevational view being identical;

FIG. 5 is a typical end elevational view; and,

FIG. 6 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
3568625 March 1971 Cilento
4010708 March 8, 1977 Keledy et al.
4029042 June 14, 1977 Juhasz
4445457 May 1, 1984 Bacgman
4867095 September 19, 1989 Shane et al.
Patent History
Patent number: D330865
Type: Grant
Filed: May 30, 1991
Date of Patent: Nov 10, 1992
Assignee: Wilkerson Corporation (Englewood, CO)
Inventors: George N. Peletis (Englewood, CO), Robert B. Tosi (Evergreen, CO), Ronald E. MacPherson (Indian Hills, CO)
Primary Examiner: Carmen H. Vales-Lado
Assistant Examiner: Antoine D. Davis
Attorney: Ralph F. Crandell
Application Number: 7/707,391