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:
Jun. 28, 2011
Filed:
Sep. 16, 2008
Tomoyuki Aida, Tokyo, JP;
Tomoyuki Aida, Tokyo, JP;
THK Co., Ltd., Tokyo, JP;
Abstract
Provided is a slewing ring which has a structure with a large slewing diameter, and is readily produced at low cost. The slewing ring includes: an outer ring (), in which a load rolling groove () and a no-load rolling groove () for a large number of balls () are arranged along a circumferential direction of an inner peripheral surface of the outer ring () in parallel to each other; an inner ring (), which is provided inside the outer ring (), and in which a load rolling groove () and a no-load rolling groove () for the large number of balls () are arranged along a circumferential direction of an outer peripheral surface of the inner ring () in parallel to each other; and a plurality of ball-retaining blocks (), which are provided in a gap between the outer ring and the inner ring, are assembled between the outer ring and the inner ring through the large number of balls, and causes the large number of balls () to circulate in an endless manner between the load rolling groove () of the outer ring () and the no-load rolling groove () of the inner ring () and between the no-load rolling groove () of the outer ring () and the load rolling groove () of the inner ring ().