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:
Mar. 31, 1981
Filed:
May. 25, 1979
Dieter C Juergens, Bark River, MI (US);
Harnischfeger Corporation, West Milwaukee, WI (US);
Abstract
An auxiliary counterweight arrangement resists lateral as well as forward tipping of a mobile crane that has a platform rotatable about a vertical axis and a boom mounted on the platform to swing in a vertical plane containing said axis. The boom normally projects at a forward and upward inclination from the platform, and its top, from which a load line depends, may be connected with the top of a mast that is behind it, in the same vertical plane. Two surface-supported counterweight carriers are rigidly attached to the platform, spaced equal distances to the rear of it and at equal distances to opposite sides of said vertical plane. Each carries a counterweight. With a mast on the platform, a guy line extends from its top to each counterweight; otherwise, a guy line extends from the top of the boom to each counterweight. Lengthening the arms of the V-shaped rigid connection between platform and counterweight carriers increases resistance to lateral tilting in step with increased resistance to forward tilting.