Bexel Corporation

Vectrix Corporation

Russell G Dobrowski

Arthur L Arledge

Blair F Baldwin

Peter S Hughes

Andrew N Szabo

An electric scooter employs an equalization circuit for charging a plurality of series connected batteries used to power the scooter. The equalization circuit has a number of cell circuits, each connected across the terminals of a corresponding battery. Each cell circuit includes two voltage detectors, a first implemented as a modular voltage monitor for detecting a low voltage across the battery terminals, and the second implemented as a Zener diode to detect a high voltage across the battery terminals. Both voltage monitors are enabled by an optocoupler switch. When the switch is turned on and either a low or a high voltage condition is detected, the cell circuit outputs a signal reflective of this condition through a second optocoupler. During a constant current charging phase, a high voltage condition causes the cell circuit to cause a portion of the charging current to bypass that battery, thus achieving equalization. A controller, which selectively enables the first optocoupler, also receives outputs from logic circuitry which tells whether any of batteries have low voltage and also whether the series connected batteries are fully charged. The scooter monitors the batteries for low voltage conditions during starting and also during quiescent states, i.e., low or no current draw, when it is being operated.

Electrical scooter having an equalization circuit for charging multiple

An umbrella canopy includes a single sheet of web material formed in a closed configuration and having a periphery, said single sheet of web material having a bowed configuration, said single sheet of web material having at least one radially oriented tuck therein which applies a circumferential force on said single sheet of web material to form said single sheet of web material into said bowed configuration, each said tuck extending radially outwardly to said periphery.

Umbrella canopy and method of forming same

An umbrella includes a hollow tubular handle extending in an axial direction, the handle having an upper edge and a lower portion; an elongated rod having an upper end and a lower end, the elongated rod movable in the axial direction within the hollow tubular handle; a plurality of struts pivotally mounted to the upper end of the elongated rod for movement in a range between a storage position substantially parallel to the axial direction and adjacent to the elongated rod, and an open position substantially perpendicular to the axial direction; a web of flexible, water-resistant material connected to the struts; and a locking mechanism connected to a lower end of the elongated rod for engaging with a lower portion of the tubular handle to releasably lock the struts in either the open position in which the struts rest on the upper edge of the tubular handle, and the closed position in which the struts are positioned within the tubular handle, the locking mechanism including two diametrically opposite spring fingers mounted to the lower end of the elongated rod, each spring finger having a first step for engaging with the lower portion of the tubular handle to releasably lock the struts in the open position, and a second step for engaging with the lower portion of the tubular handle to releasably lock the struts in the closed position, the first outer step being positioned below and radially outward of the second outer step on each spring finger.

Growing community of inventors

Clinton, NJ, United States of America

Russell G Dobrowski