The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2007
Filed:
Nov. 28, 2002
Kevin Herbert, Gloucestershire, GB;
Kevin Herbert, Gloucestershire, GB;
Other;
Abstract
A portable defibrillator includes a self-test circuit in which electrical energy is discharged from one or a bank of capacitors to a charge receiving circuit which recycles the energy to a rechargeable battery to prolong the original battery charge. A charge receiving circuit may contain a relatively high Ohmic value/low Wattage resistor such that the discharge occurs over a relatively long period of time, rendering a heat sink unnecessary. The resistor may be a single high value resistor or a network of plural smaller value resistors. Optional switching of the discharge electrical energy during a self-test either recycles it to the rechargeable battery or discharges it through the resistor. The self-test may be carried out on a bank of capacitors in rotation, discharging energy from one capacitor into the next such that all capacitors are charged and discharged from substantially a single power input.