US Patent No: 6,833,518

Number of patents in Portfolio can not be more than 2000

Load tap changer with direct drive and brake

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

A rotary tap changer is connected to a power source to control voltage supplied from the power source to a load. The rotary tap changer includes a motor having an output device, and a drive sprocket having a drive shaft positioned perpendicularly to a plane of rotation of the drive sprocket. The rotary tap changer also includes a gear engaged by the drive shaft, a first set of movable contacts, and a transmission device. The first set of movable contacts is coupled to the gear and mounted to conductively engage taps of an electrical control device. The transmission device is coupled to the motor output device and to the drive sprocket such that the motor directly drives the first set of movable contacts for selecting an electrical control device tap.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
MCGRAW-EDISON COMPANYHOUSTON, TX110

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Byers, Christopher J Waukesha, WI 2 17
Conway, Dennis O Milwaukee, WI 2 17
Dirk, Neal Whitefish Bay, WI 4 37
Hernandez, Augusto D Brookfield, WI 13 47

Cited Art

Patent Info (Count) # Cites Year
 
MASCHINENFABRIK REINHAUSEN GMBH (3)
5,834,717 On-load tap changer of a step switch 12 1997
6,091,032 Tap changer 10 1998
6,060,669 Tap selector 10 1998
 
ABB AB (1)
5,523,535 On-load tap changer 10 1995
 
ASEA AKTIEBOLAG (1)
4,207,445 On-load tap changer switch assembly 11 1977
 
COOPER INDUSTRIES, INC. (1)
5,191,179 Tap selector anti-arcing system 9 1990
 
COOPER POWER SYSTEMS, INC. (1)
5,056,377 Tap selector anti-arcing system 8 1989
 
MAGNETEK ELECTRIC, INC. (1)
4,533,797 Low voltage rotary tap changer 7 1984
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
4,595,806 On-load tap changer 9 1984
 
WAUKESHA ELECTRIC SYSTEMS, INC. (1)
5,744,764 Modular de-energized switch for transformer tap changing 8 1996

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
COOPER TECHNOLOGIES COMPANY (6)
7,614,357 Step voltage regulator polymer position indicator with non-linear drive mechanism 0 2003
7,750,257 Molded polymer load tap changer 3 2004
7,408,275 Preventive maintenance tapping and duty cycle monitor for voltage regulator 1 2004
7,482,714 Preventive maintenance tapping and duty cycle monitor for voltage regulator 1 2005
7,343,873 Step voltage regulator polymer position indicator with non-linear drive mechanism 2 2006
7,915,766 Preventive maintenance tapping and duty cycle monitor for voltage regulator 0 2008
 
MASCHINENFABRIK REINHAUSEN GMBH (2)
7,622,688 Tap changer 0 2005
7,652,218 Energy store 1 2006
 
TSINGHUA UNIVERSITY (1)
7,679,012 High-voltage automatic changeover switch 0 2007
 
Other [Check patent profile for assignment information] (1)
7,049,795 Underload tapchanging voltage regulators for ease of field replacement and for improved operator safety 2 2004

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Jun 21, 2016
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00