Braking means for mobile devices

Claim 1

A MOBILE DEVICE HAVING A FRAME MOUNTED ON WHEELS, A PLATFORM SUPPORTED ON THE FRAME IN ELEVATED CONDITION IN RELATIONSHIP TO THE WHEELS, AND BRAKING MEANS LOCATED BENEATH SAID PLATFORM AND MOUNTED ON SAID FRAME, SAID BRAKING MEANS COMPRISING AT LEAST ONE ASSEMBLY OF ELEMENTS INCLUDING A TUBULAR ELEMENT ORIENTED ESSENTIALLY VERTICALLY IN RELATION TO A PLANE THROUGH THE WHEELS OF SAID MOBILE DEVICE, SAID TUBULAR ELEMENT BEING SPACED FROM THE SURFACE SUPPORTING WHEELS OF SAID DEVICE, A PLUNGER TELESCOPICALLY ENGAGED WITHIN THE LOWER END OF SAID TUBULAR ELEMENT AND NORMALLY WITHDRAWN FROM THE SURFACE SUPPORTING THE WHEELS OF SAID DEVICE BUT ADAPTED TO BE EXTENDED DOWNWARDLY FROM SAID TUBULAR ELEMENT TO ENGAGE WITH SAID SURFACE, A TOGGLE MECHANISM FOR EXTENDING SAID PLUNGER DOWNWARDLY FROM SAID TUBULAR ELEMENT AND RETRACTING SAID PLUNGER FROM ITS EXTENDED CONDITION, AND BIASING MEANS WITHIN SAID TUBULAR ELEMENT FOR BIASING SAID PLUNGER IN A RETRACTED CONDITION FROM THE SURFACE SUPPORTING THE WHEELS OF SAID DEVICE, SAID TUBULAR ELEMENT HAVING AN ELONGATED ESSENTIALLY VERTICAL OPENING ALONG THE SIDE THEREOF, ONE OF THE ARM MEANS OF THE TOGGLE MECHANISM INCLUDING A LONGITUDINAL SEGMENT OUT OF SAID TUBULAR ELEMENT ALONG ONE SIDE THEREOF AT SAID OPENING AND SEPARATED THEREFROM, WITH A FLANGE EXTENSION INWARDLY FROM ONE END OF SAID SEGMENT PIVOTALLY CONNECTED TO SAID TUBULAR ELEMENT AND A HANDLE MEMBER ATTACHED EXTERNALLY TO SAID SEGMENT TO PERMIT SAID SEGMENT TO BE PIVOTED OUTWARDLY FROM SAID TUBULAR ELEMENT INTO A NON-BRAKING POSITION AND RETURNED THERETO FOR BRAKING, THE OTHER OF THE ARM MEANS OF SAID TOGGLE MECHANISM INCLUDING AT LEAST ONE CONNECTING ROD PIVOTALLY ATTACHED TO SAID PLUNGER AT A LOCATION ON SAID PLUNGER WHICH REMAINS WITHIN SAID TUBULAR ELEMENT DURING BOTH EXTREMES OF MOVEMENT OF SAID PLUNGER AS EFFECTED BY SAID TOGGLE MECHANISM, THE PIVOT BETWEEN SAID ARM MEANS OF SAID TOGGLE MECHANISM BEING WITHIN SAID TUBULAR ELEMENT WHEN SAID PLUNGER IS IN SAID EXTENDED CONDITION.