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tricam
A Tricam is a type of climbing protection equipment.
A versatile nut/cam hybrid, the Tricam was invented by Greg Lowe in 1973, and came to market in 1981. They are currently manufactured by C.A.M.P. of Premana Italy.
==Design==
The Tricam is a passive camming device consisting of a carefully shaped aluminium-alloy cam attached to a length of webbing tape. Most sizes are produced as a solid forged unit, but the larger sizes are made from riveted sheet metal.
The device is inserted into a crack so that pulling on the tape makes the piece cam outward against the sides of the crack, gripping the rock tighter. Camming action is achieved by the position of the pointed fulcrum or pivot of the cam relative to the attachment of the tape. As the webbing is pulled, the downward force is pivoted onto the point, which can bite into soft rock or ice and increases the holding power of the tricam. 〔(), CAMP product manual, retrieved 2008-07-04〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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