US Patent Issued to Y&R Allum on Oct. 21 for "Balanced piston pump for subsea use" (Australian Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,097, issued on Oct. 21, was assigned to Y&R Allum Pty Ltd (Lilyfield, Australia).

"Balanced piston pump for subsea use" was invented by Ronald Allum (Sydney), Alan Lavery (Sydney), Matthew Johnston (Sydney) and Rhys Horner (Sydney).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 (31...