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. 08, 1988
Filed:
Apr. 07, 1986
Terry L Petzold, Kiel, WI (US);
David J Pech, Manitowoc, WI (US);
The Manitowoc Company, Inc., Manitowoc, WI (US);
Abstract
An attachment for increasing the lifting capacity of a crane having a mobile lower works with an upper works including a rear portion rotatably mounted thereon and having a pivotally mounted boom and an upwardly and rearwardly projecting mast carried on the upper works with means for lifting a load from the top of the boom and rigging means interconnecting the top of the boom, the top of the mast and the rear portion of the upper works, including a counterweight support beam detachably connected to the crane upper works and extending rearwardly therefrom, a counterweight assembly including a movable carrier mounted on the support beam for movement along the length thereof, an actuator for selectively moving the counterweight carrier fore and aft along the beam, a leg for normally supporting the trailing end of the beam on the ground, and a rear pendant interconnecting the trailing end of the beam and the top of the mast for raising the leg from the ground incident to lifting a heavy load from the boom.