PROTECTION DEVICE FOR USE IN CLIMBING

A protection device for use in climbing of the type known as a "spring-loaded camming device" - abbreviated "SLCD" - is disclosed. The camming device comprises a a shaft (10) and a head (14) mounted on the shaft. The head includes a plurality of cam lobes (20) carried on at least...

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Bibliographic Details
Main Authors McMaster, Darren, Oldridge, David
Format Patent
LanguageEnglish
French
German
Published 09.08.2023
Subjects
AMUSEMENTS
APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING,CLIMBING, OR FENCING
BALL GAMES
GAMES
HUMAN NECESSITIES
SPORTS
TRAINING EQUIPMENT
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Summary:A protection device for use in climbing of the type known as a "spring-loaded camming device" - abbreviated "SLCD" - is disclosed. The camming device comprises a a shaft (10) and a head (14) mounted on the shaft. The head includes a plurality of cam lobes (20) carried on at least one cam axle (16), each cam lobe being capable of rotation about a pivot axis centred on the cam axle, with an increasing lobe angle ω between a retracted position and an expanded position. Each cam lobe has a cam surface (30) that extends about the axis with a working range of contact angles ωmin ≤ ω ≤ ωmax. The cam surface (30) is at a radial distance r from the axis that continually increases with ω. In at least one of the cam lobes (20) the distance r of the cam surface from the axis is a modified logarithmic spiral that has a cam angle α that decreases with an increase in ω; The head also has biasing means that operate to bias the cam lobes towards the expanded position.
Bibliography:Application Number: EP20230152531