Pipeline plug
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FIG. 1 is a top plan view of a pipeline plug, showing our new design in an inflated state;
FIG. 2 is a side elevational view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a side elevational view thereof and showing the side opposite that of FIG. 2;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a top plan view thereof, in a deflated state;
FIG. 8 is a side elevational view thereof;
FIG. 9 is a front elevational view thereof;
FIG. 10 is a rear elevational view thereof;
FIG. 11 is a side elevational view thereof and showing the side opposite that of FIG. 8;
FIG. 12 is a bottom plan view thereof;
FIG. 13 is a top plan view of an alternate embodiment, showing our new design in an inflated state;
FIG. 14 is a side elevational view thereof;
FIG. 15 is a front elevational view thereof;
FIG. 16 is a rear elevational view thereof;
FIG. 17 is a rear elevational view thereof and showing the side opposite that of FIG. 14;
FIG. 18 is a bottom plan view thereof; and,
FIG. 19 is a perspective view of the pipeline plug of FIG. 1 and which shows our new design of a pipeline plug in an inflated state.
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5240031 | August 31, 1993 | Vigil |
- Cherne Industries Incorporated, Cherne Single-Size Test-Ball Plug, 1992, Product sheet, 1 page.
Type: Grant
Filed: May 19, 1994
Date of Patent: Apr 1, 1997
Assignee: Cherne Industries Incorporated (Minneapolis, MN)
Inventors: Allen D. Mathison (Richfield, MN), Randy D. Smith (New Hope, MN)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: Eric Watterson
Attorney: Anthony G. Eggink
Application Number: 0/23,217