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:
Apr. 24, 2001
Filed:
Sep. 27, 1999
Applicant:
Inventors:
Assignee:
ABB Power T&D Company Inc., Raleigh, NC (US);
Primary Examiner:
Int. Cl.
CPC ...
B29C 7/070 ;
U.S. Cl.
CPC ...
B29C 7/070 ;
Abstract
A method of manufacturing transformer windings embedded in casting resin is disclosed which utilizes an integrated winding mandrel for producing a non-standard oval shaped epoxy encapsulated low voltage coil for dry type distribution transformers. The method includes a process of winding a low voltage oval coil over a disposable mold which acts as both a winding mandrel and as an inner mold shell for epoxy encapsulation. Both the inner and outer molds are made of low cost sheet metal utilizing a “wrap and band” process The complete winding and molding processes can all be conducted on a standard winding machine.