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:
May. 26, 2009
Filed:
Aug. 27, 2004
Yoshikazu Kuroumaru, Kashiwara, JP;
Shirou Nakano, Minamikawachi-gun, JP;
Katsutoshi Nishizaki, Nabari, JP;
Yoshikazu Kuroumaru, Kashiwara, JP;
Shirou Nakano, Minamikawachi-gun, JP;
Katsutoshi Nishizaki, Nabari, JP;
JTEKT Corporation, Osaka, JP;
Abstract
A reduction gear unit capable of reducing vibrations caused by gear rattle, while permitting some degree of backlash in a pair of gears, is provided. A reduction gear unit is so configured that a pinion shaft and a main gear shaft are disposed in parallel to each other, and a pinionmounted on the pinion shaft and a main gearmounted on the main gear shaft are arranged to mesh with each other, so as to transmit a rotation of the pinion shaft to the main gear shaft, and includes a housingthat encloses the pinionand the main gearwhere the housinghas an inner surface whose width, in a cross section perpendicular to an axial direction of the pinion shaft and the main gear shaft, perpendicular to an imaginary line that connects centers of the pinion shaft and the main gear shaft evenly increases from a pinion side toward a main gear side between ends of arcuate regions respectively enclosing the main gear and the pinion. The housingcontains a resin lubricant of a sufficient amount for immersing a part of a portion where the pinionand the main gearmesh with each other.