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. 04, 1989
Filed:
Jul. 16, 1987
Michael N Grimm, Roanoke, VA (US);
Forrest F Farley, Jr, New Castle, VA (US);
Randolph C Oliver, Newport, VA (US);
Crawford Fitting Company, Solon, OH (US);
Abstract
A tube bending apparatus of the radius block and slide block type is provided with a one-way drive means for permitting selectable driven rotation of the radius block means thereof in the bending direction while preventing reverse driving. Interchangeable radius block and slide block means are provided to accommodate different size bend radii and tube diameter to be accommodated. The apparatus also includes slide block retainer means for accommodating different height slide blocks, as well as tube clamping means for accommodating different tube diameters. The slide block means may be marked with indicia for aiding in the gauging of center-to-center dimensional gain in finished 45 and 90 degree forward and reverse bends prior to forming the bends. A method for pre-gauging center-to-center dimensional gain of such bends is also described. A second embodiment of the tube bending apparatus includes radius block and slide block means having inclined concavities for forming radiused overlapping 360 degree bends.