Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Reexamination Certificate
2003-07-25
2009-02-03
Sircus, Brian (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
C361S024000
Reexamination Certificate
active
07486489
ABSTRACT:
A speed control and stall protection system10for an electric DC brush motor includes a DC brush motor M. At least one relay K3is connected between the motor and a power supply. A speed sensing circuit20is constructed and arranged to generate a signal indicative of a speed of the motor. A motor control and protection circuit116is constructed and arranged to receive 1) the signal from the speed sensing circuit and 2) a control signal input for operating the at least one relay to control operation of the motor. When a stall condition is determined based on the signal from the speed sensing circuit, the motor control and protection circuit is constructed and arranged to control the at least one relay to disconnect power to the motor.
REFERENCES:
patent: 3551775 (1970-12-01), Safiuddin
patent: 3931557 (1976-01-01), Osburn
patent: 4205639 (1980-06-01), Kawase et al.
patent: 4314186 (1982-02-01), Gille et al.
patent: 4384312 (1983-05-01), Fry
patent: 4623826 (1986-11-01), Benjamin et al.
patent: 4683411 (1987-07-01), Hamilton, Jr. et al.
patent: 4695779 (1987-09-01), Yates
patent: 4721083 (1988-01-01), Hosaka
patent: 4725765 (1988-02-01), Miller
patent: 5012168 (1991-04-01), Dara et al.
patent: 5017846 (1991-05-01), Young et al.
patent: 5334917 (1994-08-01), Lind
patent: 5335307 (1994-08-01), Sommer
patent: 5367236 (1994-11-01), Salazar
patent: 5408164 (1995-04-01), Oosthuizen
patent: 5459661 (1995-10-01), Yagi et al.
patent: 5630009 (1997-05-01), Hayden
patent: 5659452 (1997-08-01), Blackburn
patent: 5675464 (1997-10-01), Makaran et al.
patent: 5760556 (1998-06-01), Hamilton et al.
patent: 5761018 (1998-06-01), Blakely
patent: 6034494 (2000-03-01), Kitamine et al.
patent: 6087791 (2000-07-01), Maruyama
patent: 6201369 (2001-03-01), Johnson
patent: 6203293 (2001-03-01), Yamamoto et al.
patent: 6380641 (2002-04-01), Matsubara et al.
patent: 6507164 (2003-01-01), Healey et al.
patent: 6548975 (2003-04-01), Kleinau et al.
patent: 6593716 (2003-07-01), Lange et al.
patent: 6940241 (2005-09-01), Lange et al.
patent: 2002/0088653 (2002-07-01), Takamoto et al.
patent: 3113165 (1991-05-01), None
patent: 63297743 (1998-12-01), None
“DC Motor Adjustable Speed Control Installation and Operating Instructions”, Leeson Electric Corporation.
“CET4 Electronic Control and Protection System”, Sprecher-Schuh.
Bartos, “Motor Stating and Protection Moves Closer to the Process”, Control Engineering Europe, May 1, 1998.
Dragoi Corneliu
Lakerdas Andrew
Simofi-Ilyes Attila
Nguyen Danny
Siemens Canada Limited
Sircus Brian
LandOfFree
System and method for speed control and stall protection... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for speed control and stall protection..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for speed control and stall protection... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4140660