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:
Oct. 22, 2002
Filed:
Apr. 09, 2001
Richard George Arthur Butler, Dunedin, NZ;
Graeme Colin Fuller, South Dunedin, NZ;
Fisher & Paykel Limited, Auckland, NZ;
Abstract
A transformerless non-switched mode power supply for use with whiteware appliances having a water heating element. A high power voltage dropping resistor is used in series with a rectifier and a switching device phase controls the mains half waves to produce a variable voltage direct current supply for an appliance motor. The voltage dropping resistor is formed by the water heater element and the DC supply voltage is controlled by the appliance controller to vary the motor torque as required.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile