ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,116, issued on March 18, was assigned to Allison Transmission Inc. (Indianapolis).
"Hydraulic piston design" was invented by Ionut Manta (Avon, Ind.) and Evan Meredith (Indianapolis).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system has been developed for engaging a clutch pack using a hydraulic piston. The system can be used with an automatic transmission or another part of the drivetrain of a vehicle. The system includes a piston, a clutch pack, and a housing that contains the piston and clutch pack. To engage and disengage the piston against the clutch pack, the system is configured to fill and empty a hydraulic chamber on a hydraulic side ...