Patents by Inventor Alan Lavery

Alan Lavery 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).

  • Balanced piston pump for subsea use
    Patent number: 12448097
    Abstract: A balanced piston pump (300) for use in subsea vehicles, for example in a variably buoyancy engine, includes an inlet (321), an outlet (325) and at least one fluid path between the inlet and the outlet. A piston arrangement in the fluid path includes a stepped piston (330) having a large end (333) and a small end (331). The step (336) of the piston cooperates with the body (310) of the pump to form a piston chamber (320). The ends (332, 334) of the piston are each exposed to ambient pressure. The force required to drive the pump is dependent on the difference in cross sectional areas of the ends of the pistons.
    Type: Grant
    Filed: September 9, 2021
    Date of Patent: October 21, 2025
    Assignee: Y&R Allum Pty Ltd
    Inventors: Ronald Allum, Alan Lavery, Matthew Johnston, Rhys Horner
  • Balanced Piston Pump for Subsea Use
    Publication number: 20240010314
    Abstract: A balanced piston pump (300) for use in subsea vehicles, for example in a variably buoyancy engine, includes an inlet (321), an outlet (325) and at least one fluid path between the inlet and the outlet. A piston arrangement in the fluid path includes a stepped piston (330) having a large end (333) and a small end (331). The step (336) of the piston cooperates with the body (310) of the pump to form a piston chamber (320). The ends (332, 334) of the piston are each exposed to ambient pressure. The force required to drive the pump is dependent on the difference in cross sectional areas of the ends of the pistons.
    Type: Application
    Filed: September 9, 2021
    Publication date: January 11, 2024
    Inventors: Ronald Allum, Alan Lavery, Matthew Johnston, Rhys Horner