Pipe plug lock unit
Latest Cherne Industries Incorporated Patents:
Description
FIG. 1 is a top perspective view of a pipe plug unit showing our new design;
FIG. 2 is a right side elevational view thereof, the left side being a mirror image of the right side;
FIG. 3 is a top plan view thereof;
FIG. 4 is another top perspective view thereof showing the unit in an open position;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevation view thereof.
The broken line representation of a pipe plug in FIGS. 1, 2 and 4 and a lock in FIGS. 2 and 4 are for purposes of illustration only and forms no part of the claimed design.
Referenced Cited
U.S. Patent Documents
D208016 | June 1967 | Bullard |
D242521 | November 1976 | Plympton |
D257218 | October 7, 1980 | Eriksson |
D283246 | April 1, 1986 | Jack |
D300350 | March 21, 1989 | Mathison |
D305927 | February 6, 1990 | Linderman et al. |
3672403 | June 1972 | Wilson et al. |
4370919 | February 1, 1983 | Wagner |
4415005 | November 15, 1983 | Janzen |
4614206 | September 30, 1986 | Mathison et al. |
4762151 | August 9, 1988 | Kinnan |
Patent History
Patent number: D329687
Type: Grant
Filed: Jun 14, 1990
Date of Patent: Sep 22, 1992
Assignee: Cherne Industries Incorporated (Minneapolis, MN)
Inventors: Bryan R. Benson (North Branch, MN), Allen D. Mathison (Richfield, MN)
Primary Examiner: James R. Largen
Attorney: Anthony G. Eggink
Application Number: 7/538,177
Type: Grant
Filed: Jun 14, 1990
Date of Patent: Sep 22, 1992
Assignee: Cherne Industries Incorporated (Minneapolis, MN)
Inventors: Bryan R. Benson (North Branch, MN), Allen D. Mathison (Richfield, MN)
Primary Examiner: James R. Largen
Attorney: Anthony G. Eggink
Application Number: 7/538,177
Classifications
Current U.S. Class:
Element Or Attachment (D23/249)