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. 13, 2010
Filed:
Sep. 24, 2007
Kazuyuki Miyazaki, Akashi, JP;
Kazuyuki Miyazaki, Akashi, JP;
Kobelco Cranes Co., Ltd., Tokyo, JP;
Abstract
A bifurcated connection portion is formed on one of an upper rotating body and a boom foot, a flat plate connection portion inserted into the bifurcated connection portion is formed on the other, and pin holes are provided in both the connection portions. A boom foot pin attachment and detachment apparatus is to insert a boom foot pin into both the pin holes aligned, and provided with a cylinder bracket attached to an inner piece of the bifurcated connection portion enabling the boom foot pin to move between an insertion position inside the pin holes and a pull out position outside the pin holes, a slide plate slidably provided on the cylinder bracket, a hydraulic cylinder attached to the plate with a piston rod thereof connected to the boom foot pin, and a regulation plate for selectively regulating sliding of the slide plate or movement of the boom foot pin at a predetermined time.