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:
Jun. 02, 2009
Filed:
Oct. 27, 2006
Keith E. Gleasman, Fairport, NY (US);
James Y. Gleasman, Rochester, NY (US);
Paul W. Suwijn, Pittsford, NY (US);
Keith E. Gleasman, Fairport, NY (US);
James Y. Gleasman, Rochester, NY (US);
Paul W. Suwijn, Pittsford, NY (US);
Torvec, Inc, Rochester, NY (US);
Abstract
The compact, all-gear full-traction differential includes meshing pairs of side-gear worms and worm-wheel balance gears having a 'hybrid' design. Preferably, the teeth of each side-gear worm have an involute profile but are cut with only plunge feed, while the teeth of the worm-wheel portions of the balance gears are helicoid worms having tip and root modifications made by a concave-shaped cutter. The side-gear worm teeth have a helix angle equal to or greater than 45° and significantly chamfered ends, and the gears are designed to provide a gear ratio between 1.5:1 and 2.5:1. The numbers of teeth in the spur-gear portion and worm-wheel portion of each balance gear and in each side-gear worm are all divisible by 2 or by 3, preferably by both 2 and 3.