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:
Jan. 25, 1977
Filed:
Apr. 16, 1975
John L Hockensmith, Chambersburg, PA (US);
John L Grove, Greencastle, PA (US);
Fulton Industries, Inc., McConnellsburg, PA (US);
Abstract
A telescopic crane boom is provided in which tubular boom sections include a thicker, flat bottom plate and a thinner channel having the free edges of its walls welded to the bottom plate at the lateral edges of the bottom plate. Wear pads for supporting an outer boom section, e.g., the fly section, are placed on the bottom plate of the adjacent inner section, e.g., the mid-section, closely adjacent to the vertical walls of the inner section, and underlying the walls of the outer section, to provide substantially columnar support for the walls of the outer section, reduced bottom plate bending forces, and reduced boom width and weight.