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. 17, 1989
Filed:
Feb. 26, 1988
Donald R Rigsby, Jenison, MI (US);
James R Dehlinger, Ada, MI (US);
David A Passmore, Wayland, MI (US);
Benteler Industries, Inc., Grand Rapids, MI (US);
Abstract
The specification discloses extension nipple formation at acute angles on tubular engine exhaust manifold bodies for lap weld attachment of side runners. An articulated or single axis mandrel is inserted axially into the tubular body, each mandrel portion being in an angular body portion. Precut holes in the body are of oval shape. Laterally extensible forming dies are positioned in guide recesses in respective mandrel portions to be aligned with the precut holes and extensible at acute angles to the body and at an angle to each other. Drawing rods are extensible by transfer actuator cylinders into the dies where the rods are interlocked with the dies by rotary actuators. Power forming actuators then shift the rods and dies outwardly to form cylindrical nipples, the forming actuators temporarily overcoming the transfer actuators, and then returning the dies into the mandrel. The rods are then released from the dies and retracted, and the mandrel with dies withdrawn.