External sealing cap for pipes
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FIG. 1 is a top view of an external sealing cap for pipes, showing my new design;
FIG. 2 is a side view, the opposite side being a mirror image thereof excluding the slotted head of the bolt element;
FIG. 3 is a top perspective view thereof;
FIG. 4 is a top view of an alternate embodiment of an external sealing cap for pipes;
FIG. 5 is a side view, the opposite side being identical excluding the bolt element;
FIG. 6 is a top perspective view thereof;
FIG. 7 is a bottom perspective view of the external sealing cap of FIG. 1 and showing the external sealing cap installed on a pipe;
FIG. 8 is a bottom perspective view of the external sealing cap of FIG. 1;
FIG. 9 is a bottom perspective view of the alternate embodiment of the external sealing cap of FIG. 4; and,
FIG. 10 is a top perspective view thereof and showing the external sealing cap installed on a pipe.
The dotted line representation of a pipe in FIGS. 7 and 10 are for illustration purposes only and forms no part of the claimed design.
| D223156 | March 1972 | Aoroto |
| D257057 | September 23, 1980 | Logsdon |
| D281350 | November 12, 1985 | Heier |
| D311056 | October 2, 1990 | Patterson |
| 3525366 | August 1970 | De Frees |
| 3713463 | January 1973 | Bywater, Jr. |
| 4139005 | February 13, 1979 | Dickey |
| 4269232 | May 26, 1981 | Witschi |
- Cherne Industries Incorporated, Test-Kap, 1995, p. 1. Jim-Cap Company, Inc., Jim Cap Thin Wall Sewer Pipe;, 1978., pp. 1,2.
Type: Grant
Filed: Apr 12, 1996
Date of Patent: Jun 10, 1997
Assignee: Cherne Industries Incorporated (Minneapolis, MN)
Inventor: Allen D. Mathison (Richfield, MN)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: Eric Watterson
Attorney: Anthony G. Eggink
Application Number: 0/53,041
