Patents Assigned to Hobart Brothers Company
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Publication number: 20110030414Abstract: Air conditioning systems including a refrigeration circuit having at least one fan or blower are provided. The air conditioning systems also include a multi-voltage induction motor coupled to the fan/blower. The multi-voltage induction motor includes motor windings adapted for use when the motor windings are wired in a first voltage wiring configuration and a second voltage wiring configuration, the second voltage being greater than the first voltage. The multi-voltage induction motor may be wired in the first voltage wiring configuration, and a variable frequency drive may be adapted to maintain an operating voltage to frequency ratio of the multi-voltage induction motor at approximately a voltage to frequency design ratio of the multi-voltage induction motor. Also provided are power conductors adapted to transmit power to the variable frequency drive at a voltage approximately equal to the second voltage for operation of the multi-voltage induction motor.Type: ApplicationFiled: June 21, 2010Publication date: February 10, 2011Applicant: Hobart Brothers CompanyInventors: Ty Allan Newell, Benjamin Eric Newell, Alexander Yemma Long
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Patent number: 7863538Abstract: The gas-metal arc welding of metal-core wile electrodes in the pure Ar shielding gas for carbon steel, low alloy steel, and ferritic stainless steel is described. Such shielding gas provides several benefits not realized ??the gas-metal arc welding process with solid wires. When compared to standard argon/oxygen containing gas mixtures normally used for metal cored wires, these benefits include reduced silicate islands on the weld surface for improved weld appearance, reduced welding fume, and lower weld spatter, all of which provide easier clean-up after the welding operation. Benefits also include reduced arc penetration desirable for welding on thinner materials or handling poor joint fit-up. Lower voltage requirement further makes it possible to weld on thinner materials. Lower oxygen content in the weld deposits provide better toughness and easier welding in all-positions.Type: GrantFiled: March 19, 2004Date of Patent: January 4, 2011Assignee: Hobart Brothers CompanyInventors: Steve Barhorst, Joseph Bundy, Daryl Duncan
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Publication number: 20100307178Abstract: A modular air conditioning (AC) system including one or more AC modules is provided. The AC modules may be adapted to function individually or cooperatively as part of a modular system. The AC modules may be further adapted to connect in a variety of advantageous ways to facilitate the supply of conditioned air to a variety of downstream applications.Type: ApplicationFiled: March 31, 2010Publication date: December 9, 2010Applicant: Hobart Brothers CompanyInventors: Richard L. Hansen, Benjamin Eric Newell, Ty Allan Newell, Alexander Yemma Long
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Patent number: 7763822Abstract: The hybrid wire of the present invention comprises approximately 1% Wt to 30% Wt of non-metallic ingredients, with the preferred concentrations selected from the range from about 5% Wt to about 15% Wt. Non-metallic compounds and metallic oxides, which were added to the tubular wires and found to perform well in the SAW process, are CaO, MgO, MgAl, K2O, CaF2, MnO, NaAlF6, and K2AlF6. Adding one or more of the listed compounds to the core composition of the tubular wires leads to an improvement of the welding performance in a SAW process due to the properties of core of the wire, while reducing the importance of the granular flux.Type: GrantFiled: November 14, 2003Date of Patent: July 27, 2010Assignee: Hobart Brothers CompanyInventor: Peter J. Nicklas
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Publication number: 20090084120Abstract: A conditioned air delivery system is provided for parked aircraft. The system can accommodate elevated thermal loads while maintaining operation, albeit with reduced flow rates or slightly elevated temperatures. When temperature set points are not reached or cannot be maintained, a second compressor of a refrigeration unit is operated in parallel with a first compressor. When refrigerant pressure becomes excessive, a second fan is operated that is associated with a condenser of the system. Still higher pressures, indicative of higher thermal loads, can cause the system to shut down operation of one of the compressors, reducing the overall cooling capacity of the system, while maintaining the supply of refrigerated air to the aircraft. The airflow may be reduced to maintain an air temperature at or near the desired temperature. Coordination of several parallel and redundant refrigeration units may be provided with a single blower and coordinated control.Type: ApplicationFiled: September 28, 2007Publication date: April 2, 2009Applicant: Hobart Brothers CompanyInventors: Richard Meier, Varun Rajasekaran, Daniel Quinones
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Publication number: 20080149513Abstract: A wire container having a housing consisting essentially of recyclable material is provided. The housing has a peripheral wall defining a boundary leading from a first end to a second end of the housing, a plurality of end portions folded inwardly at the second end to define an end wall, and a plurality of support structures coplanar with and coupled to the end wall and extending across the plurality of end portions. A welding wire and container assembly is also provided, in which a coil of welding wire is disposed in the housing and support by the base.Type: ApplicationFiled: December 3, 2007Publication date: June 26, 2008Applicant: HOBART BROTHERS COMPANYInventors: Adam Rolfes, Sanjeev Thapa, Steve Barhorst
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Patent number: 7091448Abstract: A cored electrode for arc welding, said electrode having a core in which the fill material includes a manganese-containing composite particle.Type: GrantFiled: July 6, 2004Date of Patent: August 15, 2006Assignees: Hobart Brothers Company, University of TorontoInventors: Thomas H. North, Lowell E. Mott
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Patent number: 7087860Abstract: A core composition of a metal-cored wire comprising a combination of graphite and potassium compounds has been proven to stabilize the arc in a straight polarity welding configuration. In particular, adding a combination of graphite and potassium manganese titanate (K2MnTiO4) and potassium sulfate (K2SO4) in the preferred combination of graphite and potassium compounds from the range of about 0.3% to about 5.Type: GrantFiled: April 13, 2004Date of Patent: August 8, 2006Assignee: Hobart Brothers CompanyInventors: Anthony Nikodym, Steven Barhorst
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Publication number: 20060076336Abstract: A weld wire electrode for use as a consumable in a gas-metal arc welding process comprises two or more strips wrapped around one another and drawn to a desired wire diameter.Type: ApplicationFiled: October 13, 2004Publication date: April 13, 2006Applicant: Hobart Brothers CompanyInventors: Sundaram Nagarajan, Fuhu Chen
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Patent number: 7017742Abstract: A container for storing material, such as welding wire. The container is adapted to be lifted by inserting a fork, or other lifting member, of a lifting device into the container. The container may comprise a fiber drum having one or more openings, or recesses, adapted to receive a fork of a lifting device. The container may be cylindrical. The container may be comprised of a cellulosic material. The container may house welding wire. A method of manufacturing a container adapted to be lifted by inserting a member of a lifting device into the container also is featured.Type: GrantFiled: April 10, 2002Date of Patent: March 28, 2006Assignee: Hobart Brothers Company,Inventors: Robert K. Dragoo, David E. Shepherd, Michael A. Rowland
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Patent number: 6933468Abstract: An aluminum metal-core weld wire, the sheath being aluminum, the metal-core having a composition that contains primarily metallic alloying powders e.g. Manganese nitride and/or barium. A method for manufacturing aluminum metal-core wire, the method including depositing a core composition onto strip of aluminum, forming strip of aluminum into a tube containing core composition, and applying an inorganic lube to surface of tube, and drawing tube through reducing dies.Type: GrantFiled: September 27, 2001Date of Patent: August 23, 2005Assignee: Hobart Brothers CompanyInventors: James M. Keegan, Sundaram Nagarajan, Sushil R. Jana
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Publication number: 20050103751Abstract: The hybrid wire of the present invention comprises approximately 1% Wt to 30% Wt of non-metallic ingredients, with the preferred concentrations selected from the range from about 5% Wt to about 15% Wt. Non-metallic compounds and metallic oxides, which were added to the tubular wires and found to perform well in the SAW process, are CaO, MgO, MgAl, K2O, CaF2, MnO, NaAlF6, and K2AlF6. Adding one or more of the listed compounds to the core composition of the tubular wires leads to an improvement of the welding performance in a SAW process due to the properties of core of the wire, while reducing the importance of the granular flux.Type: ApplicationFiled: November 14, 2003Publication date: May 19, 2005Applicant: Hobart Brothers CompanyInventor: Peter Nicklas
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Publication number: 20050045612Abstract: The present invention is a weld wire comprising a sheath encapsulating a metal core made of powdered metal, wherein a fill percentage of the metal core is no less than approximately 12%. The metal core comprises a core composition alloyed with an alloying element or an combination of elements comprising Cr, Mo, V, W, Hf and Nb or combinations thereof, wherein a total weight percentage of the alloying element or the combination of elements in the core composition does not exceed approximately 1%. In a particular embodiment, the alloying element is Mo in the amounts selected from the range of about 0 to about 0.5 percent by weight and the fill percentage of the metal core is selected from the range of about 12% to about 30%. In a particular embodiment of the invention, the total percentage of the combination of elements is selected from the range of about 0.4% to about 0.8%.Type: ApplicationFiled: June 29, 2004Publication date: March 3, 2005Applicant: Hobart Brothers CompanyInventors: Fuhu Chen, Sundaram Nagarajan
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Patent number: 6855913Abstract: A weld wire having a core composition comprising a combination of graphite and a compound of potassium is disclosed. The combination of graphite and the compound of potassium in the core composition does not exceed approximately 5% by weight, making it possible for the wire to be used in an alternating current welding process without destabilizing a welding arc. The wire comprises the compound of potassium, which is K2MnTiO4, wherein the combination of graphite and the compound of potassium in the core composition is selected from the range of about 0.3% to about 5% by weight.Type: GrantFiled: August 6, 2002Date of Patent: February 15, 2005Assignee: Hobart Brothers CompanyInventor: Anthony Nikodym
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Patent number: 6835913Abstract: A welding wire comprising a flux core having a core composition alloyed with a combination of alloying elements is described. The alloying elements comprise Cr and N, wherein the flux core comprises between 10% and 50% of the total weight of the weld wire. A metal sheath encapsulates the flux core, wherein the metal sheath comprises between about 90% and 50% of the total weight of the welding wire and wherein the welding wire can be used in a welding process without destabilizing a welding arc. One of the applications of the wire and welding process of the present invention is hard surfacing of the steel mill rolls, which are hollow cylinders usually on continuous casters. As an example, the rolls welded by the wire and method of the present invention can have a diameter of about 12 inches or less. Additionally, a welding apparatus comprising a welding gun with a device for feeding an electrode into the welding gun is described.Type: GrantFiled: March 3, 2003Date of Patent: December 28, 2004Assignee: Hobart Brothers CompanyInventors: Daryl L. Duncan, Joseph C. Bundy
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Publication number: 20040188407Abstract: A core composition of a metal-cored wire comprising a combination of graphite and potassium compounds has been proven to stabilize the arc in a straight polarity welding configuration. In particular, adding a combination of graphite and potassium manganese titanate (K2MnTiO4) and potassium sulfate (K2SO4) in the preferred combination of graphite and potassium compounds from the range of about 0.3% to about 5.Type: ApplicationFiled: April 13, 2004Publication date: September 30, 2004Applicant: Hobart Brothers CompanyInventors: Anthony Nikodym, Steven Barhorst
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Patent number: 6787736Abstract: The present invention is a weld wire comprising a sheath encapsulating a metal core made of powdered metal, wherein a fill percentage of the metal core is no less than approximately 12%. The metal core comprises a core composition alloyed with an alloying element or an combination of elements comprising Cr, Mo, V, W, Hf and Nb or combinations thereof, wherein a total weight percentage of the alloying element or the combination of elements in the core composition does not exceed approximately 1%. In a particular embodiment, the alloying element is Mo in the amounts selected from the range of about 0 to about 0.5 percent by weight and the fill percentage of the metal core is selected from the range of about 12% to about 30%. In a particular embodiment of the invention, the total percentage of the combination of elements is selected from the range of about 0.4% to about 0.8%.Type: GrantFiled: January 13, 2002Date of Patent: September 7, 2004Assignee: Hobart Brothers CompanyInventors: Fuhu Chen, Sundaram Nagarajan
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Patent number: 6723954Abstract: A core composition of a metal-cored wire comprising a combination of graphite and potassium compounds has been proven to stabilize the arc in a straight polarity welding configuration. In particular, adding a combination of graphite and potassium manganese titanate (K2MnTiO4) and potassium sulfate (K2SO4) in the preferred combination of graphite and potassium compounds from the range of about 0.3% to about 5.0% wt resulted in a greatly stabilized arc, reduced spatter and reduced warpage while maintaining high deposition rates of the DCEN welding process.Type: GrantFiled: January 22, 2002Date of Patent: April 20, 2004Assignee: Hobart Brothers CompanyInventors: Anthony Nikodym, Steven Barhorst
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Patent number: 5577070Abstract: A signal, in the form of high power, low energy pulses that are generated on cables that are connected directly to the terminals of a low impedance battery, are transmitted between a memory device located on the battery and a data recorder located at the charger end of the battery charging cables. Information transfer between the battery memory device and a charger is done through the battery cables, eliminating the need for special connections. The high power, low energy pulses imposed on the battery cables may be detected at each end of the cables, in spite of the low impedance nature of large lead acid batteries. Pulses are created across the terminals of the battery using a fast acting switch (preferably a FET), a capacitor, and a current limiting resistor connected in series across the cables. When the switch is closed in response to an external command, high power, low energy pulses imposed at one end of the cables are detected at the other end of the cables.Type: GrantFiled: July 1, 1994Date of Patent: November 19, 1996Assignee: Hobart Brothers CompanyInventors: Stephen R. King, Thomas M. Bolka
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Patent number: D574605Type: GrantFiled: December 22, 2005Date of Patent: August 12, 2008Assignee: Hobart Brothers CompanyInventors: Jeffery P. Schroeder, Anthony F. Nikodym, Michael A. Mohrbacker