Patents by Inventor Andrew Edward Carlson

Andrew Edward Carlson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Trip free relay
    Patent number: 11456139
    Abstract: An overload relay is disclosed in which a single operator coil is controlled for both tripping and resetting. A permanent magnet and a spring make the device bi-stable, so the coil may be unpowered when in the trip and reset states. Energization of the coil overcomes the magnet to allow tripping, while energization in an opposite direction adds to the magnet force to reset the device. An electromagnetic activation path overrides a mechanical activation path for electromagnetic tripping despite attempted manual resetting. The device may be pulse width modulated to reduce power consumption.
    Type: Grant
    Filed: February 23, 2021
    Date of Patent: September 27, 2022
    Assignee: Rockwell Automation Technologies, Inc.
    Inventor: Andrew Edward Carlson
  • TRIP FREE RELAY
    Publication number: 20210175037
    Abstract: An overload relay is disclosed in which a single operator coil is controlled for both tripping and resetting. A permanent magnet and a spring make the device bi-stable, so the coil may be unpowered when in the trip and reset states. Energization of the coil overcomes the magnet to allow tripping, while energization in an opposite direction adds to the magnet force to reset the device. An electromagnetic activation path overrides a mechanical activation path for electromagnetic tripping despite attempted manual resetting.
    Type: Application
    Filed: February 23, 2021
    Publication date: June 10, 2021
    Inventor: Andrew Edward Carlson
  • Trip free relay
    Patent number: 10930462
    Abstract: An overload relay is disclosed in which a single operator coil is controlled for both tripping and resetting. A permanent magnet and a spring make the device bi-stable, so the coil may be unpowered when in the trip and reset states. Energization of the coil overcomes the magnet to allow tripping, while energization in an opposite direction adds to the magnet force to reset the device. An electromagnetic activation path overrides a mechanical activation path for electromagnetic tripping despite attempted manual resetting. The device may be pulse width modulated to reduce power consumption.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: February 23, 2021
    Assignee: Rockwell Automation Technologies, Inc.
    Inventor: Andrew Edward Carlson
  • TRIP FREE RELAY
    Publication number: 20190115178
    Abstract: An overload relay is disclosed in which a single operator coil is controlled for both tripping and resetting. A permanent magnet and a spring make the device bi-stable, so the coil may be unpowered when in the trip and reset states. Energization of the coil overcomes the magnet to allow tripping, while energization in an opposite direction adds to the magnet force to reset the device. An electromagnetic activation path overrides a mechanical activation path for electromagnetic tripping despite attempted manual resetting.
    Type: Application
    Filed: October 12, 2017
    Publication date: April 18, 2019
    Inventor: Andrew Edward Carlson