US Patent No: 5,652,416

Number of patents in Portfolio can not be more than 2000

Mechanically held electrically or manually operated switch

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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, MN59

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hegland, Michael T Mounds Veiw, MN 20 85
Sharaf, Nadir Mounds View, MN 28 100

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Andco Actuator Products, Inc. (1)
4,328,885 Actuator activated switching mechanism 6 1980
 
CUMMINS POWERGEN IP, INC. (1)
4,999,598 Three-position actuating mechanism for transfer switch 14 1989
 
GENERAL ELECTRIC COMPANY (1)
4,245,140 Manual and motor operated circuit breaker 26 1979
 
LEAR AUTOMOTIVE DEARBORN, INC. (1)
5,281,779 Multi-function modular switch 12 1992
 
Merlin Gerin (1)
5,296,660 Auxiliary shunt multiple contact breaking device 87 1993
 
ONAN CORPORATION (1)
4,423,336 Electromechanically controlled automatic transfer switch and bypass switch assembly 48 1982
 
Westinghouse Electric Corp. (1)
5,027,096 Key blocks for circuit breaker 8 1989

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
EATON CORPORATION (2)
6,930,271 Circuit interrupter including linear actuator and manual pivot member 20 2004
7,545,245 Manual opening device and electrical switching apparatus employing the same 1 2006
 
Electric Power Research Institute, Inc. (2)
6,188,145 Meter collar with interface for connecting on-site power source, and the interface itself 15 1999
6,376,937 Meter collar with interface for connecting on-site power source, and the interface itself 4 2000
 
GENERAL ELECTRIC COMPANY (2)
6,815,622 Methods and apparatus for automatically transferring electrical power 6 2001
8,809,705 Device and method for switching electrical energy 0 2007