Rock climbing adjustable chock
OwnerPeter C. Taylorinventor
Life of this patent
Estimating the term…
Abstract
An adjustable chock having a biforcated handle (20) with a shaft (30) tensionally positioned between the forks in closed loop fashion. Three opposed cams (34) with teeth on the periphery are positioned on the shaft (30) and spring loaded to rotate to their widest point of separation. A pull rod (40) is slideably located within a slot (28) in each fork of the handle (20) with a connecting link (42) pivotally attached on one end to the link and on the other to the cam (34). When the pull rod (40) is manually retracted, the cams (34) are rotated to their minimum width for insertion into a rock fissure and when released spring loadingly return to the open position for gripping the internal surface in a chock like manner.
Claims7
A rock climbing adjustable chock of the type having opposed pivotal cams the improvement comprising:
- (a) a biforcated yoke handle having a counter-bored hole in each fork on the first end and a palm shaped second end with opposed extending fingers, each fork having a slot in parallel planar relationship;
- (b) a shaft tensionally positioned between said forks of the handle, each end urgingly supported within said counterbored holes;
- (c) a plurality of opposed cams rotatably positioned on said shaft at least one pivoting in one direction and at least a pair pivoting in the opposite direction, for gripping the inside surface of a crack in a rock;
- (d) a plurality of torsional springs disposed upon said shaft with each end pivotally fixed to said cam urging opposed rotation thereof;
- (e) a pull rod slideably disposed within said slot in each fork free to move transversely fore and aft, providing a gripping surface for actuation of said chock;
- and,
- (f) a plurality of connecting links, each link freely reciprocable having one end pivotally mounted on the periphery of said cam and the other end slideably joined to said pull rod for retractably rotating said spring loaded opposed cams when sliding said pull rod toward said palm shaped yoke end while being inserted into an open rock fault, further providing an adjustable device to which a climbing rope may be attached to arrest a fall.
Dependencies are inferred from the claim text.