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:
Oct. 05, 1982
Filed:
Sep. 06, 1979
Forrest N LaRue, Sand Spring, OK (US);
Lionel H Wheeler, Houston, TX (US);
Crutcher Resources Corporation, Houston, TX (US);
Abstract
A hydraulic wedge mandrel is disclosed for supporting top and bottom cylindrical segments of pipe during cold bending of the pipe. Bottom and top assemblies (14) and (16) are vertically movable to and away from each other for expanding and collapsing the mandrel. Bottom and top arcuate support segments (18) and (22) support the bottom and top assemblies (14) and (16) respectively. Bottom spring plate (20) is mounted to bottom arcuate support segments (18) opposite bottom assembly (14) and top spring plate (24) is mounted to top arcuate support segments (22) opposite top assembly (16). Secured to the top of bottom spring plate (20) and the bottom of top spring plate (24) are a plurality of wedges (28). Secured to center spring plate (26) located between bottom and top spring plates (20) and (24) are complementary wedges (30) which traverse and supportably engage wedges (28) when center spring plate (26) is moved longitudinally of bottom spring plate (20) and top spring plate (24) to move bottom and top assemblies (14) and (16) apart and in engagement with cylindrical segments of a pipe.