Inventors:
John Bercaw - Salt Lake City UT
Chris Harmston - Sandy UT
William J. Reimann - Salt Lake City UT
Paul Tusting - Salt Lake City UT
Tyler Warner - Salt Lake City UT
Assignee:
Black Diamond Equipment, Ltd. Inc. - Salt Lake City UT
International Classification:
A47F 508
US Classification:
2482319, 24823191, 248925, 248694, 411400, 411401, 411411
Abstract:
An ice screw device for winter, alpine and ice climbing includes a banger couplable to a tubular shank with a screw thread. The tubular shank includes an ice engaging portion configured to be inserted into ice, a tip, and a head portion. The ice engaging portion includes a length and a reverse taper. A majority of the reverse taper of the ice engaging portion is located proximate the tip and within less than half of the length of the ice engaging portion from the tip. In addition, the taper of the ice engaging portion is non-linear. The ice engaging portion of the tubular shank can have at least two sections. A first section nearer the tip has a first taper different from a second taper of a second section nearer the head portion.