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Patent
D711839
Priority
Jul 03 2012
Filed
Jan 03 2013
Issued
Aug 26 2014
Expiry
Aug 26 2028
Assg.orig
Entity
unknown
0
12
n/a
The ornamental design for a hydraulic drive for high-voltage circuit breaker, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a perspective view of a hydraulic drive for high-voltage circuit breaker showing our new design.
FIG. 2 is a first side elevational view thereof.
FIG. 3 is a second side elevational view thereof.
FIG. 4 is a third side elevational view thereof.
FIG. 5 is a fourth side elevational view thereof.
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a top plan view thereof.
Schmidt, Matthias , Knospe, Jörg
Patent
Priority
Assignee
Title
Patent
Priority
Assignee
Title
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4166937 ,
May 18 1978
General Electric Company
Hydraulically-activated operating system for an electric circuit breaker
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Aug 04 1980
EMERSON ELECTRIC CO A CORP OF MISSOURI
Timing mechanism with a digital clock
4384182 ,
May 29 1980
General Electric Company
Hydraulic actuator for an electric circuit breaker
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Mar 27 1987
BBC Brown Boveri Aktiengesellschaft
Hydraulic drive for a high-voltage switchgear
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Oct 16 1987
HARTMANN & LAMMIE GMBH & CO KG
Hydraulic drive mechanism
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Apr 08 1999
S & C Electric Co.; S&C ELECTRIC CO
Electrical power distribution switch
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Feb 11 2004
CONCENTRIC ROCKFORD INC
Control valve supply for rotary hydraulic machine
8440930 ,
Dec 31 2009
LS Industrial Systems Co., Ltd.
Vacuum circuit breaker
8481880 ,
Jun 02 2008
Siemens Aktiengesellschaft
Drive system for electrical switching devices
20130256274 ,
20130277190 ,
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