Patents Assigned to Accriva Diagnostics, Inc.
  • Methods of operating a pump to reduce or eliminate pump backlash errors
    Patent number: 11242848
    Abstract: A method of operating a pump can include advancing a stepper motor one or more additional steps in a first direction after detecting a first change in a limit sensor state corresponding to a piston reaching an end of its travel in a first direction. After advancing the stepper motor the additional step or steps in the first direction, the stepper motor can be reversed and advanced in a second direction until a second change in the limit sensor state is detected. The stepper motor can then be advanced in the second direction a predetermined number of steps associated with a full travel of the piston.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: February 8, 2022
    Assignee: ACCRIVA DIAGNOSTICS, INC.
    Inventors: Ajit Mishra, David Miers
  • METHODS OF OPERATING A PUMP TO REDUCE OR ELIMINATE PUMP BACKLASH ERRORS
    Publication number: 20200072213
    Abstract: A method of operating a pump can include advancing a stepper motor one or more additional steps in a first direction after detecting a first change in a limit sensor state corresponding to a piston reaching an end of its travel in a first direction. After advancing the stepper motor the additional step or steps in the first direction, the stepper motor can be reversed and advanced in a second direction until a second change in the limit sensor state is detected. The stepper motor can then be advanced in the second direction a predetermined number of steps associated with a full travel of the piston.
    Type: Application
    Filed: November 6, 2019
    Publication date: March 5, 2020
    Applicant: Accriva Diagnostics, Inc.
    Inventors: Ajit MISHRA, David MIERS
  • Methods of operating a pump to reduce or eliminate pump backlash errors
    Patent number: 10519942
    Abstract: A method of operating a pump can include advancing a stepper motor one or more additional steps in a first direction after detecting a first change in a limit sensor state corresponding to a piston reaching an end of its travel in a first direction. After advancing the stepper motor the additional step or steps in the first direction, the stepper motor can be reversed and advanced in a second direction until a second change in the limit sensor state is detected. The stepper motor can then be advanced in the second direction a predetermined number of steps associated with a full travel of the piston.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: December 31, 2019
    Assignee: Accriva Diagnostics, Inc.
    Inventors: Ajit Mishra, David Miers
  • METHODS OF OPERATING A PUMP TO REDUCE OR ELIMINATE PUMP BACKLASH ERRORS
    Publication number: 20180030980
    Abstract: A method of operating a pump can include advancing a stepper motor one or more additional steps in a first direction after detecting a first change in a limit sensor state corresponding to a piston reaching an end of its travel in a first direction. After advancing the stepper motor the additional step or steps in the first direction, the stepper motor can be reversed and advanced in a second direction until a second change in the limit sensor state is detected. The stepper motor can then be advanced in the second direction a predetermined number of steps associated with a full travel of the piston.
    Type: Application
    Filed: September 21, 2016
    Publication date: February 1, 2018
    Applicant: Accriva Diagnostics, Inc.
    Inventors: Ajit MISHRA, David MIERS