Electrical transformer

- ABB T&D Technology, Ltd.
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Description

This application is also related to co-pending U.S. application Ser. No. 29/275,260, filed Dec. 19, 2006.

FIG. 1 is a front elevation view of an electrical transformer showing our new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a perspective view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design.

Claims

The ornamental design for an electrical transformer, as shown and described.

Referenced Cited
U.S. Patent Documents
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D188248 June 1960 Albright et al.
D188249 June 1960 Albright et al.
2947957 August 1960 Spindler
D195975 August 1963 Bianco et al.
D202045 August 1965 Oberlin
D210130 February 1968 Stewart
3479563 November 1969 Roy
D219923 February 1971 Marchand
D222480 October 1971 Canney
3781741 December 1973 Weiner
4027279 May 31, 1977 Shigehara et al.
D254846 April 29, 1980 Wood
D257342 October 14, 1980 Payne
4257027 March 17, 1981 Yasuhisa
D259040 April 28, 1981 Pierce
D290456 June 23, 1987 Burgher et al.
D294565 March 8, 1988 Makinson et al.
D324371 March 3, 1992 Patty
D348868 July 19, 1994 Terlop et al.
6185811 February 13, 2001 Perry et al.
Other references
  • ABB Inc., Power Transformers, 2003, 11 pgs.
  • ASA Trafobau GmbH, 24 pgs. — Date unknown.
  • Koncar—Distributivni i Specijalni Transformatori d.d., Power Transformers (3,2) V 01, 8 pgs. — Date unknown.
  • SGB Starkstrom and SMIT Transformers, Partners in Power, 6 pgs. — Date unknown.
  • MF Transformatori srl, Oil Filled Transformer, 14 pgs., Date unknown.
Patent History
Patent number: D613687
Type: Grant
Filed: May 5, 2009
Date of Patent: Apr 13, 2010
Assignees: ABB T&D Technology, Ltd. (Zurich), ABB Technology AG (Zurich)
Inventors: Sigurdur Thorsteinsson (Milan), Egil Stryken (Solbergelva), Richard Tinggren (Thalwil)
Primary Examiner: Prabhakar Deshmukh
Assistant Examiner: Derrick Holland
Attorney: Connolly Bove Lodge & Hutz LLP
Application Number: 29/336,557
Classifications
Current U.S. Class: Transformer, Rectifier Or Casing Therefor (3) (D13/110)