Patents by Inventor Steven Pfeifenroth

Steven Pfeifenroth 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).

  • Patent number: 10196242
    Abstract: A method of transferring a load is disclosed. The method includes the steps of enabling synchronization of first and second hoists and first and second trolleys and choosing a hoist function or a trolley function. The first and second hoists are a first mover and second mover, if the hoist function is selected. The first and second trolleys are the first and second movers, if the trolley function is selected. The method includes the steps of commanding one of the first mover and second mover to be the master and the other to be the slave and actuating a master control associated with the master. The method further includes the step of outputting signals to the first and second actuators such that the master and the slave are moved in a direction indicated by the master control.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: February 5, 2019
    Assignee: Mi-Jack Products, Inc.
    Inventors: Matthew M. Moran, Steven Pfeifenroth
  • Publication number: 20160200554
    Abstract: A method of transferring a load is disclosed. The method includes the steps of enabling synchronization of first and second hoists and first and second trolleys and choosing a hoist function or a trolley function. The first and second hoists are a first mover and second mover, if the hoist function is selected. The first and second trolleys are the first and second movers, if the trolley function is selected. The method includes the steps of commanding one of the first mover and second mover to be the master and the other to be the slave and actuating a master control associated with the master. The method further includes the step of outputting signals to the first and second actuators such that the master and the slave are moved in a direction indicated by the master control.
    Type: Application
    Filed: March 22, 2016
    Publication date: July 14, 2016
    Inventors: Matthew M. Moran, Steven Pfeifenroth
  • Patent number: 9321614
    Abstract: A method of transferring a load is disclosed. The method includes the steps of enabling synchronization of first and second hoists and first and second trolleys and choosing a hoist function or a trolley function. The first and second hoists are a first mover and second mover, if the hoist function is selected. The first and second trolleys are the first and second movers, if the trolley function is selected. The method includes the steps of commanding one of the first mover and second mover to be the master and the other to be the slave and actuating a master control associated with the master. The method further includes the step of outputting signals to the first and second actuators such that the master and the slave are moved in a direction indicated by the master control.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: April 26, 2016
    Assignee: Mi-Jack Products, Inc.
    Inventors: Matthew M. Moran, Steven Pfeifenroth
  • Publication number: 20150203334
    Abstract: A method of transferring a load is disclosed. The method includes the steps of enabling synchronization of first and second hoists and first and second trolleys and choosing a hoist function or a trolley function. The first and second hoists are a first mover and second mover, if the hoist function is selected. The first and second trolleys are the first and second movers, if the trolley function is selected. The method includes the steps of commanding one of the first mover and second mover to be the master and the other to be the slave and actuating a master control associated with the master. The method further includes the step of outputting signals to the first and second actuators such that the master and the slave are moved in a direction indicated by the master control.
    Type: Application
    Filed: January 17, 2014
    Publication date: July 23, 2015
    Applicant: Mi-Jack Products, Inc.
    Inventors: Matthew M. Moran, Steven Pfeifenroth
  • Patent number: 7665971
    Abstract: A control system and method for obtaining power on demand from a diesel engine in order to operate vehicle functions and accessories. The method comprised of: (1) determining a flow rate necessary to operate each of a plurality of function hydraulic pumps and an vehicle drive pump associated with the engine; (2) comparing the flow rates of the various hydraulic pumps to determine the greatest flow rate; (3) establishing an engine speed necessary to deliver the greatest flow rate; (4) comparing the engine speed necessary to deliver the greatest flow rate with a current engine speed; and (5) adjusting the current engine speed to provide the greatest flow rate required.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: February 23, 2010
    Assignee: Mi-Jack Products, Inc.
    Inventors: Myron Glickman, Harvey E. Schmidt, Daniel Olson, Steven Pfeifenroth