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. 23, 2002
Filed:
Dec. 22, 2000
Seiji Miyaura, Oosaka-fu, JP;
Komatsu Limited, Tokyo, JP;
Abstract
A fitting space having an annular opening, in which an elastic ring whose diameter of a section is D is to be fitted, is formed between a pin-press-fit hole of a link and an exposed end portion of a pin. A link inner wall face and a pin outer peripheral face in the fitting space are formed with tapered faces whose diameters decrease as they go toward an inmost of the fitting space at angles &agr; and &bgr; (&agr;>&bgr;) with respect to the axial line of the pin, respectively. The elastic ring contacts with the respective tapered faces in the fitting space at the angles &agr; and &bgr; with respect to a perpendicular passing a center of its section. Dimensions d and d between contact points at the respective tapered faces and a horizontal line passing the center of the section of the elastic ring, the diameter D of the section of the elastic ring, and the angles &agr; and &bgr; have a relation of &agr;>&bgr;, D>d +d (where d =D/2·cos &agr;, d =D/2·cos &bgr;). Therefore, the links and the pin can be connected to each other securely and firmly with a sufficient holding force to the pin in the axial direction. Thus, assembly of the links and the pin can be carried out easily at a low cost.