Fan control

Fluid reaction surfaces (i.e. – impellers) – Method of operation

Reexamination Certificate

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Details

C416S039000, C417S053000, C415S001000

Reexamination Certificate

active

06893221

ABSTRACT:
A method for controlling fan operation that includes detecting a stopped fan and attempting to start the stopped fan. The method includes attempting to start the stopped fan again after at least one first time interval when the fan does not start. The method includes attempting to start the stopped fan again after at least one second time interval when the fan does not start after a predetermined number of first time intervals, where the at least one second time interval is longer than the first time interval.

REFERENCES:
patent: 4756473 (1988-07-01), Takemae et al.
patent: 5831405 (1998-11-01), Massie
patent: 6170275 (2001-01-01), Ueno et al.
Microchip, “TC652/TC653 Integrated Temperature Sensor & Brushless DC Fan Controller with FanSense Detect & Over-Temperature” 2002 Microchip Technology Inc., 14 pgs.
Microchip, “PIC12C67X 8-Pin, 8-bit CMOS Microcontroller with A/D Converter and EEPROM Data Memory”, 1999 Microchip Technology Inc., 129 pages.

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