ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,912, issued on Nov. 18, was assigned to Rotoliptic Technologies Inc. (Squamish, Canada).

"Axial load in helical trochoidal rotary machines" was invented by Greg John Montie (Squamish, Canada), Peter Thomas Christopher Suke (Squamish, Canada) and Bryan Allen Callaway (Schaumburg, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Rotary positive displacement machines based on trochoidal geometry and including a helical rotor that undergoes planetary motion relative to a helical stator can be designed and configured so that the axial load or rotor pressure force is positive, negative, or neutral. In some embodiments, a change in axial load, caused by...