Patents by Inventor Mark E. Rollins

Mark E. Rollins 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).

  • Method for soft expulsion of a fluid from a compressor at start-up
    Patent number: 10385852
    Abstract: A method for expulsion of a fluid inside a compressor at start-up including the steps: applying a first signal to the motor windings for a first duration of time to align the motor rotor to the initial position; applying a second signal to the motor windings to start rotation of the compressor shaft; applying a third signal to the motor windings for a second duration of time to hold the compressor shaft in place; and applying a fourth signal to the motor windings to accelerate the motor to an operational speed.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: August 20, 2019
    Assignee: CARRIER CORPORATION
    Inventors: Da Zhang, Richard T. Pandzik, William Perdikakis, Mark E. Rollins
  • METHOD FOR SOFT EXPULSION OF A FLUID FROM A COMPRESSOR AT START-UP
    Publication number: 20160069347
    Abstract: A method for expulsion of a fluid inside a compressor at start-up including the steps: applying a first signal to the motor rotor windings for a first duration of time to align the motor rotor to the initial position; applying a second signal to the motor rotor windings to start rotation of the compressor shaft; applying a third signal to the motor rotor windings for a second duration of time to hold the compressor shaft in place; and applying a fourth signal to the motor rotor windings to accelerate the motor to an operational speed.
    Type: Application
    Filed: May 6, 2014
    Publication date: March 10, 2016
    Inventors: Da Zhang, Richard T. Pandzik, William Perdikakis, Mark E. Rollins