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:
May. 12, 1981
Filed:
Apr. 09, 1979
Dieter C Juergens, Bark River, MI (US);
Harnischfeger Corporation, West Milwaukee, WI (US);
Abstract
The upper works of a boom machine such as a crane is supported for rotation about a vertical axis on a lower portion of modular construction. The lower portion comprises a hub-like member having four leg module holders which are equidistant from said axis and spaced around it at uniform intervals and to each of which a leg module is detachably securable. To outer ends of the leg modules can be secured pad modules or extension leg modules that have ground engaging pads at their outer ends; or laterally opposite pairs of leg modules can be detachably connected to crawler modules. The hub-like member also has a pair of body module holders at opposite sides thereof, each laterally intermediate a pair of leg module holders, to which wheeled transporter modules can be detachably secured. Alternatively, with crawler modules installed, a hydraulic power module for energizing them can be secured to one body module holder. When not supporting the machine for transport or as a truck crane, transporter modules can serve as auxiliary counterweight carriages.