Rock climbing adjustable chock

Details Rock climbing adjustable chock Rock climbing adjustable chock

1985-04-04

1986-03-11

Foss, J. Franklin

Supports

Pipe or cable

Extending through plate

2482312, A47G 2900

Patent

active

045750327

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.

REFERENCES:
patent: 813384 (1906-02-01), Kiefer
patent: 2262811 (1941-11-01), McDaniels et al.
patent: 2809070 (1957-10-01), Nelson
patent: 2951725 (1960-09-01), St. Jean
patent: 3519304 (1970-07-01), Shores
patent: 3877679 (1975-04-01), Lowe
patent: 3903785 (1975-09-01), Pepper
patent: 4069991 (1978-01-01), Saunders et al.
patent: 4074880 (1978-02-01), Simond
patent: 4083521 (1978-04-01), Greiner
patent: 4184657 (1980-01-01), Jardine

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