A shopping cart wheel includes a braking apparatus, and electronics that control the braking apparatus in response to wireless signals. The wireless signals include low frequency electromagnetic signals within a low frequency band and high frequency signals within a high frequency band. The braking apparatus includes a moveable interposer and an interposer controller where the moveable interposer is moved between braking and non-breaking positions at least partially with magnetic force.
MULTIPLE FREQUENCY BAND BRAKING APPARATUS WITH MAGNETIC FORCE INTERPOSER
2017-06-15
Patent
Elektronische Ressource
Englisch
Multiple frequency band braking apparatus with clutch
Europäisches Patentamt | 2017
|MULTIPLE FREQUENCY BAND BRAKING APPARATUS WITH CLUTCH
Europäisches Patentamt | 2016
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