The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2026
Filed:
Aug. 06, 2025
Deere & Company, Moline, IL (US);
Swapnil S. More, Pune, IN;
Vaibhav V. Karekar, Pune, IN;
Ayoub J. Siddiqui, Cedar Falls, IA (US);
Richard T. Hurban, Cedar Falls, IA (US);
Deere & Company, Moline, IL (US);
Abstract
An internal combustion engine includes an engine block rotatably supporting a crankshaft for rotation about a crank axis. The engine block includes a rear end wall that defines a rear crankcase opening. A rear main seal is positioned within the rear crankcase opening. The rear main seal is configured for sealing the rear crankcase opening between the engine block and the crankshaft. A torque transmitting disc is mounted to a rearward end of the crankshaft for rotation with the crankshaft about the crank axis. The rear end wall of the engine block and a forward facing end surface of the torque transmitting disc are formed to define a labyrinth seal therebetween. The labyrinth seal is disposed radially outward of the rear main seal relative to the crank axis for blocking debris from contacting the rear main seal from an external side of the rear main seal.