A pulley assembly for use in a roped access system is disclosed. The assembly comprises first and second spaced plates and a sheave (60) carried for rotation about an axis normal to the plates (30, 32). At least one aperture (40, 42, 44) is formed through each plate in a direction parallel to the sheave axis. The plates have a closed condition in which the apertures (40, 42, 44) of the plates (30, 32) are coaxial with one another and the plates are in contact in the vicinity of the apertures to form a rope passage (46) that extends between the plates adjacent to the sheave. The rope passage (46) has an upper part that is of lesser size than parts of the rope passage below that upper part. Also disclosed is a roped access system comprising a climbing rope, a portion of which passes through the rope passage of such a pulley assembly and a tether that is connected to the climbing rope above the pulley assembly by a friction hitch and to an aperture of the pulley assembly, the friction hitch. The hitch is configured to grip the climbing rope upon application of a downward force to the tether and to release its grip on the climbing rope upon upward force applied to the friction hitch by plates of the pulley assembly.
Pulley assembly with rope passage of varying cross-section
10.02.2021
Patent
Elektronische Ressource
Englisch
IPC: | A62B DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING , Vorrichtungen, Geräte oder Verfahren zur Lebensrettung / B66D Haspeln , CAPSTANS / A63B Geräte für Körperübungen, Turngeräte, Gymnastik, zum Schwimmen, Klettern oder Fechten , APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING |
GREASE CLEANING DEVICE OF ROPE PULLEY AND GREASE CLEANING METHOD OF ROPE PULLEY
Europäisches Patentamt | 2020
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