Stannah Stairlifts Limited

Martin John Colenutt

Andreas Csaba Szentistvany

An over-speed detection device (OSDD) and over-speed governor (OSG) for a stairlift is tripped by flyweights which displace from a rotational axis of the OSDD/OSG when subjected to an over-speed. The outward displacement of the flyweights is converted into an axial displacement to effect triggering of the OSG. This ensures that the tripping speed is independent of the angle if inclination of the stairlift rail. The OSDD/OSG may be mounted so that it takes its drive from a convex surface of the rail in negative transition bends. This ensures that the speed of the OSDD/OSG is maintained close to the tripping speed even when the carriage is slowed to traverse the negative transition bend.

Over-speed detection device for stairlifts

A roller arrangement () for a stairlift carriage is described, the arrangement including a central roller set (), and outer roller sets () and (). Rollers (), () and () in the outer roller sets are mounted in yokes () which are mounted for independent pivotal movement, relative to one another, in two orthogonal axes. The axes of each set preferably lie in common planes.

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Hampshire, United Kingdom

Martin John Colenutt