Well monitor plug

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Description

FIG. 1 is a top plan view of a well monitor plug, showing my new design in open position;

FIG. 2 is a top plan view thereof, in a closed position;

FIG. 3 is a side elevational view thereof, in a open position;

FIG. 4 is a side elevational view thereof, in a closed position;

FIG. 5 is a rear elevational view thereof, in a open position;

FIG. 6 is a rear elevational view thereof, in a closed position;

FIG. 7 is a front elevational view thereof, in a open position;

FIG. 8 is a front elevational view thereof, in a closed position; and,

FIG. 9 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D35188 October 1901 Dodson, Jr.
D329686 September 22, 1992 Mathison et al.
D329687 September 22, 1992 Benson et al.
1808411 June 1931 Hinkston
3489312 January 1970 Hunckler et al.
4493344 January 15, 1985 Mathison et al.
4809949 March 7, 1989 Rakieski
4968197 November 6, 1990 Chen
Other references
  • Morrison Bros. Co., Dubuque, Ia., Monitoring Well Specification Guide, Apr., 1989, pp. 1-3 and 6.
Patent History
Patent number: D347880
Type: Grant
Filed: Nov 16, 1992
Date of Patent: Jun 14, 1994
Assignee: Cherne Industries Incorporated (Minneapolis, MN)
Inventor: Bryan R. Benson (North Branch, MN)
Primary Examiner: Stella Reid
Assistant Examiner: Eric Watterson
Attorney: Anthony G. Eggink
Application Number: 8/1,493
Classifications
Current U.S. Class: Valve Or Body Therefor (D23/233)