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:
Dec. 30, 2003
Filed:
Sep. 27, 2002
Roberto de Medeiros Brun, Joinville, BR;
Marco Eduardo Marques, Joinville, BR;
Multibras S.A. Eletrodomesticos, Sao Paulo, BR;
Abstract
A system and a method of automatic defrost for a refrigeration appliance, including a hermetic compressor driven by an electric motor ( ); a control unit ( ); a thermal switch means ( ) having a first and a second turn on condition and a turn off condition and another turn off condition of the electric motor ( ); a timer ( ), which measures the periods of time in the turn on and turn off conditions of the electric motor ( ); a switch means ( ), which selectively interrupts the energization of the electric motor ( ), by instruction of the control unit ( ); and a cycle counting means ( ), which counts each first and second turn on conditions of the electric motor ( ), the control unit ( ) selectively activating the thermal switch means ( ) to operate in determined turn on and turn off conditions of the electric motor ( ). The timer ( ) indicates to the control unit ( ) a period of time of any of the first and second turn on conditions of the electric motor ( ) which is equal to the respective predetermined maximum safety values.