An apparatus comprises an object (1) and a plurality of roller units (5A-5D) on said object, each roller unit comprising at least one roller element (13) and being switchable between a mobile mode in which the apparatus is moveable across a surface on which said apparatus is positioned in use by rolling on said roller elements, and an immobile mode in which movement of the apparatus across a said surface is inhibited. The roller units (5A-5D) are configured such that manual depression of the object towards a said surface causes switching of at least one roller unit between the mobile and immobile modes.
MOVING OBJECTS ON SURFACES
BEWEGLICHE OBJEKTE AUF OBERFLÄCHEN
DÉPLACEMENT D'OBJETS SUR DES SURFACES
2017-01-11
Patent
Electronic Resource
English
SYSTEM AND METHOD FOR MEASURING SURFACES OF MOVING OBJECTS
European Patent Office | 2019
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