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:
Apr. 28, 1992
Filed:
Apr. 24, 1991
Mark S Brewer, North Chili, NY (US);
James S Dye, Walworth, NY (US);
Zexel-Gleason U.S.A., Inc., Rochester, NY (US);
Abstract
A gear differential includes planetary gear sets made up of two side gears (26, 28) mounted for rotation about a common axis (24) and pairs of element gears (36, 38) mounted for rotation about respective parallel axes (48, 50) that are both offset and inclined through acute shaft angles (L.sub.1, L.sub.2) with respect to the common side gear axis (24). The two element gears (36, 38) have first gear portions (52, 54) that mesh with respective side gears (26, 28) and second gear portions (56, 58) that mesh with each other. The side gears (26, 28) have respective helix angles (A.sub.1, A.sub.2) that are substantially equal in absolute magnitude but opposite in hand. However, lead angles of the side gears (26, 28), as the complements of their respective helix angles (A.sub.1, A.sub.2), are larger than the shaft angles to provide opposite directions of relative rotation between the side gears.