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:
Jul. 27, 1999
Filed:
Apr. 01, 1998
Norimasa Agari, Gifu-ken, JP;
Nippon Thompson Co., Ltd., Tokyo, JP;
Abstract
In this linear motion rolling guide unit, separators of different thicknesses are interposed between adjacent rolling elements so that the rolling elements are arranged in an unequally spaced manner, whereby the vibrations and noises, which are ascribed to regular rolling of the rolling elements, are minimized, the early wear in a casing and end caps being thereby prevented. The rolling elements roll in rolling element circulating passages comprising raceways formed between raceway surfaces of a track rail and the casing, direction changing passages formed in the end caps, and return passages formed in the casing. Among the rolling elements, separators 30 formed to unequal thickness are provided. When an excessively large load is imparted to the rolling elements, impressions occurs at irregular intervals in the raceway surfaces, so that the rolling elements do not simultaneously fit in the irregularly spaced impressions while the slider is moved. Therefore, the vibrations and noises due to the rolling of the rolling elements and the early wear in the casing and end caps decrease.