Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
February 5, 2008
Patent Application Number
10489669
Date Filed
September 10, 2002
Patent Primary Examiner
Patent abstract
An endless belt (11) to be provided on a driven pulley (4b) and a pulley rotation support apparatus for supporting the driven pulley (4b). In the pulley rotation support apparatus, there is used a three-point-contact-type or four-point-contact-type radial ball bearing (14b). An offset quantity δ, which is an axial-direction distance between the center α of a radial load applied from the endless belt (11) to the driven pulley (4b) and the center position β of the radial ball bearing (14b), is set 40% or less of the pitch circle diameter of the radial ball bearing (14b). The radial clearance of this radial ball bearing (14b) is set 0.2% or less of the above pitch circle diameter.
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