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:
May. 06, 1980
Filed:
Jul. 19, 1978
Applicant:
Inventor:
Talbert D Connell, Spring, TX (US);
Assignee:
Crutcher Resources Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228 50 ; 219160 ; 228 4913 ;
Abstract
An improved back-up pad apparatus for use in externally welding abutting ends of pipe comprises a plurality of arcuate back-up pads positioned to face the interior of the weld. Each arcuate pad is mounted on a support shoe for radial movement into and out of biased engagement with the interior cylindrical surfaces of the pipes. The arcuate pads are pivotally supported by the support shoes and biased about axes parallel with the centerline of the pipe to permit retraction of the pads without interference. Preferably, the pads are constructed of hard anodized aluminum material.