Patent ID: 11874077
Assignee: STONEAGE, INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 20:
21. A method of clearing an obstruction with a flexible high pressure fluid cleaning lance drive apparatus that includes a flexible lance hose, the method comprising:
generating a command signal to cause a drive motor to advance the flexible lance hose through a tube;
identifying the obstruction in the tube based on a comparison of an expected feed distance of the flexible lance hose and an actual feed distance of the flexible lance hose;
initiating an autostroke sequence of operations in response to identifying the obstruction, wherein the autostroke sequence of operations includes operating the drive motor in a reverse direction to at least partially retract the flexible lance hose and then operating the drive motor in a forward direction to re-advance the flexible lance hose through the tube; and
repeating the identifying step and the initiating step until the obstruction is cleared.