JOSEPH L GIEBEL
Accountancy in Pittsburgh, PA
License number
Pennsylvania CA004862L
Category
Accountancy
Type
Certified Public Accountant
Address
Address
Pittsburgh, PA 15235
Professional information
Completely Expendable Mine Anchor Line Cutting Tool
US Patent:
4040376, Aug 9, 1977
Filed:
Jul 6, 1976
Appl. No.:
5/702912
Inventors:
Joseph L. Giebel - Pittsburgh PA
Assignee:
Mine Safety Appliances Company - Pittsburgh PA
International Classification:
B63B 900
US Classification:
114221A
Abstract:
A mine anchor line cutter is slidable lengthwise of a cutter body provided with a bore behind the cutter for receiving an explosive charge that is detonated by the mine anchor line that is to be cut, whereby to drive the cutter forward. The cutter body is supported by a stabilizing fin, the front portion of which is overlapped by a retaining member shaped to hook over a sweep line. Extending through the retaining member and fin and into the cutter body is a shear screw that connects them together but that is weak enough to be sheared off by movement of the cutter body rearwardly, due to recoil when the tool is fired, whereby all of the tool will separate from the sweep line supporting it.