Vacuum circuit breaker

- Kabushiki Kaisha Toshiba
Description

FIG. 1 is a front, top and right side perspective view of a vacuum circuit breaker, showing our new design;

FIG. 2 is a rear, top and left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a reference view view showing our new design in the state of use. The broken line showing is included for the purpose of illustrating environmental structure only and forms no part of the claimed design.

Referenced Cited
U.S. Patent Documents
3928716 December 1975 Marrero
4403124 September 6, 1983 Perkins et al.
4839477 June 13, 1989 Orosz et al.
4879441 November 7, 1989 Hamm et al.
4950178 August 21, 1990 Harvey et al.
Foreign Patent Documents
D576608 May 1982 JPX
D576681 May 1982 JPX
D583911 September 1982 JPX
D731712 May 1988 JPX
D812189 May 1991 JPX
D819839 October 1991 JPX
Patent History
Patent number: D350729
Type: Grant
Filed: Mar 22, 1993
Date of Patent: Sep 20, 1994
Assignee: Kabushiki Kaisha Toshiba (Kawasaki)
Inventors: Takayuki Miyazawa (Tama), Junji Fujiwara (Oume), Kimiya Sato (Tokorozawa), Makoto Taniguchi (Fuchu), Satoshi Ogawa (Fuchu), Akihiko Konno (Tokyo), Hideki Tsuboi (Koganei)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Joel Sincavage
Law Firm: Oblon, Spivak, McClelland, Maier & Neustadt
Application Number: 8/6,162