Occidental Oil Shale, Inc.

J Walter Enyeart

Ned M Hutchins

Leon G Holbrook

A bridging plug for a circular blast hole has a relatively longer major axis and a relatively shorter minor axis. The plug is hinged to pivot about the minor axis. A tension line is secured to the minor axis for lowering the plug into an explosive placement hole. The plug pivots into an angular open position when lowered into the hole. An upward force on the tension line jams the hinged portions of the plug in a closed position to plug the hole. An explosive charge can be placed in the hole at the location defined by the closed plug.

Growing community of inventors

Grand Valley, CO, United States of America

J Walter Enyeart