US Patent Issued on April 14 for "All-gear speed controller and continuously variable transmission (CVT) using harmonic helical gears" (Montana Inventor)

ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,390, issued on April 14.

"All-gear speed controller and continuously variable transmission (CVT) using harmonic helical gears" was invented by Craig Louis Althen (Bozeman, Mont.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heavy-duty, all-gear transmission using helical gears is disclosed as a CVT or IVT completely devoid of any frictional or hydraulic elements. By longitudinally moving the input member of a pair of rotating helical gears, and by varying the direction and extent of any superimposed, longitudinal motion, the rotation of the output member can be varied. When the longitudinal motion is generated with a reciprocating, harmonic mech...