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:
Aug. 08, 2000
Filed:
Mar. 09, 1998
Tetsuya Murano, Osaka-fu, JP;
Tsubakimoto Chain Co., Osaka, JP;
Abstract
A conveyor chain using an oil impregnated sintered bushing is provided. The conveyor chain using the oil impregnated bushing is high in durability and low in manufacturing cost. A roller is rotatably fitted over the oil impregnated sintered bushing of the conveyor chain. An abrasion loss of the outer peripheral surface of the oil impregnated sintered bushing and an abrasion loss of the inner peripheral surface of the roller are reduced. Furthermore, both sliding noises and burning, which are normally generated between the roller and the oil impregnated sintered bushing, can be prevented. The conveyor chain, which uses an oil impregnated sintered bushing including a roller rotatably fitted over the oil impregnated sintered bushing, is characterized in that the oil impregnated sintered bushing has a sintering density in the range of from approximately 6.0 g/cm.sup.3 to 7.1 g/cm.sup.3. The conveyor chain is further characterized in that at least an inner peripheral surface of the roller is in contact with an outer peripheral surface of the oil impregnated sintered bushing and the outer peripheral surface of the oil impregnated bushing is formed of resin.