US Patent No: 4,904,972

Number of patents in Portfolio can not be more than 2000

Gas-insulated stationary induction electrical apparatus

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Abstract

A gas-insulated stationary induction electrical apparatus comprising a first closed vessel sealingly accommodating therein a main body having an iron core formed by laminating silicon steel sheets and also having at least one set of windings each consisting of a high-voltage winding and a low-voltage winding which are disposed apart from the iron core on both sides thereof, and a liquid medium for effecting cooling and insulation; a second closed vessel formed of an insulating material and sealingly accommodating therein the first closed vessel; and an insulating gas under a predetermined pressure which is sealed within the gap between the first and second vessels, wherein the induction apparatus main body is submerged in the liquid medium.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HITACHI, LTD.TOKYO32320

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hiraishi, Kiyoto Hitachi, JP 1 45
Kiuchi, Tadashi Hitachi, JP 1 45
Mori, Etsunori Hitachi, JP 7 92
Watanabe, Masaru Tokyo, JP 108 548

Cited Art

Patent Info (Count) # Cites Year
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
4,745,677 Method of making an electromagnetic induction apparatus 2 1986

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
THE BOEING COMPANY (35)
5,500,511 Tailored susceptors for induction welding of thermoplastic 23 1994
5,508,496 Selvaged susceptor for thermoplastic welding by induction heating 27 1994
5,444,220 Asymmetric induction work coil for thermoplastic welding 22 1994
5,660,669 Thermoplastic welding 9 1994
5,710,412 Fluid tooling for thermoplastic welding 2 1995
5,573,613 Induction thermometry 11 1995
5,486,684 Multipass induction heating for thermoplastic welding 15 1995
5,571,436 Induction heating of composite materials 20 1995
7,126,096 Resistance welding of thermoplastics in aerospace structure 5 1995
6,602,810 Method for alleviating residual tensile strain in thermoplastic welds 4 1995
5,808,281 Multilayer susceptors for achieving thermal uniformity in induction processing of organic matrix composites or metals 25 1995
5,793,024 Bonding using induction heating 16 1995
5,728,309 Method for achieving thermal uniformity in induction processing of organic matrix composites or metals 43 1995
5,723,849 Reinforced susceptor for induction or resistance welding of thermoplastic composites 17 1995
5,717,191 Structural susceptor for thermoplastic welding 17 1995
5,705,795 Gap filling for thermoplastic welds 7 1995
5,645,744 Retort for achieving thermal uniformity in induction processing of organic matrix composites or metals 35 1995
5,624,594 Fixed coil induction heater for thermoplastic welding 13 1995
5,829,716 Welded aerospace structure using a hybrid metal webbed composite beam 21 1995
5,756,973 Barbed susceptor for improviing pulloff strength in welded thermoplastic composite structures 8 1995
5,556,565 Method for composite welding using a hybrid metal webbed composite beam 20 1995
5,641,422 Thermoplastic welding of organic resin composites using a fixed coil induction heater 16 1995
5,760,379 Monitoring the bond line temperature in thermoplastic welds 14 1995
RE36787 High power induction work coil for small strip susceptors 8 1996
5,705,796 Reinforced composites formed using induction thermoplastic welding 10 1996
5,847,375 Fastenerless bonder wingbox 10 1996
5,916,469 Susceptor integration into reinforced thermoplastic composites 35 1996
5,869,814 Post-weld annealing of thermoplastic welds 1 1996
5,902,935 Nondestructive evaluation of composite bonds, especially thermoplastic induction welds 27 1997
5,833,799 Articulated welding skate 2 1997
6,040,563 Bonded assemblies 10 1997
5,935,475 Susceptor integration into reinforced thermoplastic composites 36 1998
5,925,277 Annealed thermoplastic weld 2 1998
6,613,169 Thermoplastic rewelding process 3 1998
6,284,089 Thermoplastic seam welds 14 1998
 
APPLIED MATERIALS, INC. (3)
5,392,018 Electronically tuned matching networks using adjustable inductance elements and resonant tank circuits 53 1992
5,585,766 Electrically tuned matching networks using adjustable inductance elements 29 1994
5,574,410 Electronically tuned matching networks using adjustable inductance elements and resonant tank circuits 32 1994
 
ABB TECHNOLOGY AG (2)
8,314,673 Transformer assembly 0 2011
8,299,880 Transformer assembly 0 2011
 
ABB INC. (1)
5,661,280 Combination of a gas-filled interrupter and oil-filled transformer 29 1995
 
ABB OY (1)
6,456,179 Transformer 3 2000
 
COOPER INDUSTRIES, LLC (1)
5,736,915 Hermetically sealed, non-venting electrical apparatus with dielectric fluid having defined chemical composition 19 1995
 
NIPPON CHEMI-CON CORPORATION (1)
5,815,060 Inductance element 6 1994
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
5,753,068 Thermoplastic welding articulated skate 2 1997