Vacuum valve for a vacuum circuit breaker

- Kabushiki Kaisha Toshiba
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Description

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

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a cross-sectional view taken along line 8--8 in FIG. 2 with its internal mechanisms omitted.

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
D839988 June 1992 JPX
Other references
  • Asea Brown Boveri Catalog of Vacuum Circuit Breaker Type VD4, Aug. 20, 1992.
Patent History
Patent number: D350731
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)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Joel Sincavage
Law Firm: Oblon, Spivak, McClelland, Maier & Neustadt
Application Number: 0/6,166
Classifications
Current U.S. Class: Element Or Attachment (D13/173)