Ice screw having breakaway or flexing crank handle

Details Ice screw having breakaway or flexing crank handle Ice screw having breakaway or flexing crank handle

2003-09-11

2008-03-25

Wujciak, III, A. Joseph (Department: 3632)

Supports

Brackets

Specially mounted or attached

C411S400000, C248S925000

Reexamination Certificate

active

07347403

ABSTRACT:
The present invention features an ice screw for use in ice climbing, wherein the ice screw comprises: a hollow shaft having a plurality of screw threads formed thereon for securing the ice screw to a body of ice; a hanger coupled to the hollow shaft for receiving a carabiner and supporting a climber; and a flexing crank handle coupled to an aperture or eye formed within the hanger, wherein the flexing crank handle functions as a crank arm for screwing the ice screw into the body of ice, and wherein the flexing crank arm displaces or flexes from a resting, cranking position to a plurality of flexed positions in response to a load induced thereon. The flexing crank handle reduces the chance for cross-loading of an attached carabiner due to the existence of a crank handle without requiring any manual manipulation (e.g., folding) of the crank handle once the ice screw is inserted into the ice structure.

REFERENCES:
patent: 1111489 (1914-09-01), Palmer
patent: 5118061 (1992-06-01), Byrne et al.
patent: 5528803 (1996-06-01), Frisoli
patent: 5782442 (1998-07-01), Kwak et al.
patent: 6068226 (2000-05-01), Anders
patent: 6505799 (2003-01-01), Bercaw et al.
patent: 6607340 (2003-08-01), Petzl et al.
patent: 2002/0074443 (2002-06-01), Murdock

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