Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Reexamination Certificate
2008-07-01
2008-07-01
Sherry, Michael J (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
C361S030000, C361S031000, C361S024000, C318S034000, C318S049000, C318S053000, C318S767000, C318S798000, C318S805000, C318S806000, C318S536000, C318S543000, C318S544000
Reexamination Certificate
active
07394629
ABSTRACT:
A technique is provided for controlling operation of motors of different sized or ratings. Components used to apply and interrupt current to the motors may be shared in control devices for the different motors. The components may include contactors or circuit interrupters, and instantaneous trip devices. The components may be sized for the higher rated motors, and be oversized for the lower rated motors. Control circuitry permits the devices to be controlled in accordance with the characteristics of the particular motor to which the devices are applied, providing accurate circuit interruption while reducing the number of different components and component packages in a product family for the various motors.
REFERENCES:
patent: 4413213 (1983-11-01), Baumgarten
patent: 4544982 (1985-10-01), Boothman
patent: 4573132 (1986-02-01), Boothman
patent: 4967304 (1990-10-01), Dougherty
patent: 5418677 (1995-05-01), Engel
patent: 5761018 (1998-06-01), Blakely
patent: 5852351 (1998-12-01), Canada
Blakely John Herman
Helton Gregory A.
Hurley Ricky A.
Innes Mark E.
Plemmons Roger Alan
Fletcher Yoder LLP
Kuszewski Alexander R.
Patel Dharti H
Rockwell Automation Technologies Inc.
Sherry Michael J
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