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:
Mar. 22, 1994
Filed:
Nov. 17, 1992
Hideyasu Takefuta, Higashimatsuyama, JP;
Zexel-Gleason USA, Inc., Rochester, NY (US);
Abstract
A parallel-axis gear differential includes pairs of element gears (34) mounted within pockets (36) formed in a differential housing (10). Each element gear includes a first gear section (38) for meshing with one of two side gears (30 or 32), a second gear section (40) for meshing with the first gear section of its mating element gear, and a stem section (42) for interconnecting the first two gear sections. Associated with each pair of pockets are two passageways (44, 46) for providing respective paths for the flow of lubrication fluid between the exterior of the housing and the respective meshing gear sections (38, 40) of each pair of element gears (34). Further, the shape of each pair of pockets (36) is modified between its apron portions (a) and its opening (b) to increase the space between the pocket and the mating surfaces of the element gears. This increased space at the pocket opening allows a greater volume of lubricating fluid to be moved by the rotating teeth of element gears, reducing the fluid pressure between the interior portion of the pockets and the surface of the element gears, and thereby increasing the flow of lubricating fluid to facilitate lubrication.