Mechanically held electrically or manually operated switch

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5652416
SERIAL NO

08562175

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An electric transfer switch includes a linear actuator operable to switch a plurality of movable contacts from a normal power supply to a standby emergency power supply, when the normal power supply has a power outage, so as to continuously serve electricity to electric loads. A plurality of leaf springs and an offset linkage angle help prevent any incidental disconnection between the moveable contacts and the stationary contacts. The transfer switch also includes a magnetic strip. The magnetic strip is magnetized when there is a 'fault' current passing by the contact tips of the moveable and stationary contacts. The attractive force between the magnetic strip and the moveable contacts due to the magnetization overcomes the repulsive force caused by the 'fault' current so as to make the contact between the moveable contacts and the stationary contacts unopenable. The transfer switch further includes a plurality of limit switches each of which is open or closed by a protrusion disposed on a crossbar carrying the moveable contacts.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CUMMINS POWERGEN IP, INC.MINNEAPOLIS, MN32

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hegland, Michael T Mounds Veiw, MN 20 193
Sharaf, Nadir Mounds Veiw, MN 25 182

Cited Art Landscape

Patent Info (Count) # Cites Year
 
WESTINGHOUSE ELECTRIC CORPORATION (1)
* 5027096 Key blocks for circuit breaker 9 1989
 
Andco Actuator Products, Inc. (1)
* 4328885 Actuator activated switching mechanism 6 1980
 
ONAN CORPORATION (1)
* 4423336 Electromechanically controlled automatic transfer switch and bypass switch assembly 57 1982
 
CUMMINS POWERGEN IP, INC. (1)
* 4999598 Three-position actuating mechanism for transfer switch 15 1989
 
LEAR AUTOMOTIVE DEARBORN, INC. (1)
* 5281779 Multi-function modular switch 12 1992
 
Merlin Gerin (1)
* 5296660 Auxiliary shunt multiple contact breaking device 89 1993
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (3)
* 6815622 Methods and apparatus for automatically transferring electrical power 6 2001
8809705 Device and method for switching electrical energy 3 2007
* 2009/0139,843 DEVICE AND METHOD FOR SWITCHING ELECTRICAL ENERGY 1 2007
 
ELECTRIC POWER RESEARCH INSTITUTE, INC. (2)
6188145 Meter collar with interface for connecting on-site power source, and the interface itself 20 1999
6376937 Meter collar with interface for connecting on-site power source, and the interface itself 5 2000
 
EATON CORPORATION (2)
6930271 Circuit interrupter including linear actuator and manual pivot member 20 2004
7545245 Manual opening device and electrical switching apparatus employing the same 2 2006
 
LSIS CO., LTD. (2)
* 9029718 Common actuator system of multi switches for switchgear 0 2013
* 2013/0228,438 COMMON ACTUATOR SYSTEM OF MULTI SWITCHES FOR SWITCHGEAR 1 2013
* Cited By Examiner