Patents by Inventor Robert T. Main
Robert T. Main has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6672066Abstract: A fuel injector nozzle for dispensing fuel in the combustion chamber of a gas turbine engine, includes an elongated, multi-layered, convoluted nozzle feed strip having an internal passage for directing fuel through the length of the strip from the inlet end to an outlet end; and a cylindrical, multi-layered fuel dispensing nozzle unitary with the feed strip and fluidly connected to the outlet end of the feed strip for dispensing the fuel. The multi-layered feed strip and nozzle allows complex porting of fuel circuits through the injector. The internal fluid passages through the feed strip and nozzle are formed by etching.Type: GrantFiled: April 17, 2002Date of Patent: January 6, 2004Assignee: Parker-Hannifin CorporationInventors: Michael P. Wrubel, Rex J. Harvey, Peter Laing, Robert T. Mains, Barry W. Savel, Alfred A. Mancini, James Neil Cooper
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Publication number: 20020129606Abstract: A fuel injector nozzle for dispensing fuel in the combustion chamber of a gas turbine engine, includes an elongated, multi-layered, convoluted nozzle feed strip having an internal passage for directing fuel through the length of the strip from the inlet end to an outlet end; and a cylindrical, multi-layered fuel dispensing nozzle unitary with the feed strip and fluidly connected to the outlet end of the feed strip for dispensing the fuel. The multi-layered feed strip and nozzle allows complex porting of fuel circuits through the injector. The internal fluid passages through the feed strip and nozzle are formed by etching.Type: ApplicationFiled: April 17, 2002Publication date: September 19, 2002Inventors: Michael P. Wrubel, Rex J. Harvey, Peter Laing, Robert T. Mains, Barry W. Savel, Alfred A. Mancini, James Neil Cooper
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Publication number: 20020014079Abstract: A fuel injector nozzle for dispensing fuel in the combustion chamber of a gas turbine engine, includes an elongated, multi-layered, convoluted nozzle feed strip having an internal passage for directing fuel through the length of the strip from the inlet end to an outlet end; and a cylindrical, multi-layered fuel dispensing nozzle unitary with the feed strip and fluidly connected to the outlet end of the feed strip for dispensing the fuel. The multi-layered feed strip and nozzle allows complex porting of fuel circuits through the injector. The internal fluid passages through the feed strip and nozzle are formed by etching.Type: ApplicationFiled: October 12, 2001Publication date: February 7, 2002Inventors: Michael P. Wrubel, Rex J. Harvey, Peter Laing, Robert T. Mains, Barry W. Savel
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Patent number: 6321541Abstract: A fuel injector nozzle for dispensing fuel in the combustion chamber of a gas turbine engine, includes an elongated, multi-layered, convoluted nozzle feed strip having an internal passage for directing fuel through the length of the strip from the inlet end to an outlet end; and a cylindrical, multi-layered fuel dispensing nozzle unitary with the feed strip and fluidly connected to the outlet end of the feed strip for dispensing the fuel. The multi-layered feed strip and nozzle allows complex porting of fuel circuits through the injector. The internal fluid passages through the feed strip and nozzle are formed by etching.Type: GrantFiled: July 27, 1999Date of Patent: November 27, 2001Assignee: Parker-Hannifin CorporationInventors: Michael P. Wrubel, Rex J. Harvey, Peter Laing, Robert T. Mains, Barry W. Savel
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Patent number: 5605287Abstract: An airblast fuel nozzle has an injector head with an extension or support strut. An annular valve spool with a fuel discharge orifice is fixed to the head and a metering assembly surrounds the valve spool. The metering assembly includes an axially-slidable annular valve sleeve and a metal bellows. The bellows, a compression spring, and one or more shims between the valve spool and the injector head provide a preset bias on the valve sleeve such that the valve sleeve initially closes or minimizes the fuel metering area through longitudinally-extending fuel swirl slots spaced about the valve spool at the discharge orifice. When fuel under pressure flows through the injector, the fuel pressure overcomes the preset bias of the sleeve and moves the valve sleeve axially with respect to the valve spool, thereby increasing the fuel metering area through the fuel swirl slots and allowing fuel to flow (with a swirling component) therethrough.Type: GrantFiled: January 17, 1995Date of Patent: February 25, 1997Assignee: Parker-Hannifin CorporationInventor: Robert T. Mains
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Patent number: 5570580Abstract: A gas turbine fuel nozzle and method of fuel flow provide resistance to coking of the fuel by means of a multiple passage heat transfer cooling circuit. Fuel streams to primary and secondary sprays of pilot and main nozzle tips are arranged to transfer heat between the pilot primary fuel stream and each of the main secondary fuel stream and the pilot secondary fuel stream. This protects the fuel in the streams from coking during both low flow, lower engine heat conditions and high flow, high engine heat conditions. This nozzle and flow can protect engines with both single tip and dual tip nozzles.Type: GrantFiled: July 18, 1994Date of Patent: November 5, 1996Assignee: Parker-Hannifin CorporationInventor: Robert T. Mains
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Patent number: 5423178Abstract: A gas turbine fuel nozzle and method of fuel flow provide resistance to coking of the fuel by means of a multiple passage heat transfer cooling circuit. Fuel streams to primary and secondary sprays of pilot and main nozzle tips are arranged to transfer heat between the pilot primary fuel stream and each of the main secondary fuel stream and the pilot secondary fuel stream. This protects the fuel in the streams from coking during both low flow, lower engine heat conditions and high flow, high engine heat conditions. This nozzle and flow can protect engines with both single tip and dual tip nozzles.Type: GrantFiled: September 28, 1992Date of Patent: June 13, 1995Assignee: Parker-Hannifin CorporationInventor: Robert T. Mains
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Patent number: 5307635Abstract: A fuel nozzle for the combustor of gas turbine engines includes evacuated radial and axial bellows concentrically mounted to the fuel passages to prevent coking of the fuel passages and maintain the structural integrity of the integral parts and particularly the weld joints and the method of construction is disclosed.Type: GrantFiled: October 29, 1992Date of Patent: May 3, 1994Assignee: United Technologies CorporationInventors: Charles Graves, Todd Neill, Raman Ras, Kiran Patwari, Robert T. Mains, Curtis H. Scheuerman
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Patent number: 4613079Abstract: A fuel nozzle tip having primary and secondary circuits wherein a disc-shaped filter (54) is clamped against the primary body (12) by a retainer plug (56), and wherein the filter cooperates with the primary body to secure the swirl plug (38) in compression therebetween.Type: GrantFiled: October 25, 1984Date of Patent: September 23, 1986Assignee: Parker-Hannifin CorporationInventor: Robert T. Mains
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Patent number: 4428649Abstract: A power mirror remote control switch includes a switch body which supports a printed circuit board and two stacked, insulated levels of conducting terminal fingers which extend over the board. A four-way position control key overhangs the terminal fingers. The control key is pressed to flex selected terminals into conductive contact with underlying portions of the printed circuit board, thereby establishing conductive connections for energizing motors which rotate or tilt at least two power mirrors. A sliding switch is provided to define which one of the two mirrors is to be moved in the direction defined by the position control key.Type: GrantFiled: June 26, 1981Date of Patent: January 31, 1984Assignee: Cherry Electrical Products CorporationInventors: Robert T. Main, Maurice E. Kennedy
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Patent number: 4343973Abstract: An improved low cost electrical switch has a two-piece housing comprising a base and an escutcheon. The escutcheon includes a frame and a face plate which is flexible, resilient and insulative. Application of downward finger pressure on the face plate causes the face plate to deform, thereby urging a snap action dome into a shorting position across a pair of electrical contacts.Type: GrantFiled: August 13, 1980Date of Patent: August 10, 1982Assignee: Cherry Electrical Products Corp.Inventor: Robert T. Main
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Patent number: 4168803Abstract: A nozzle for atomizing fuel for combustion in a gas turbine engine. During normal operation of the engine, the nozzle uses a portion of the air supplied to the combustion chamber by the engine compressor to atomize fuel flowing through the nozzle. During start-up and low power operation of the engine when flow of engine air through the nozzle would otherwise be of insufficient velocity to cause good atomization of the fuel, additional air from a separate external source is introduced at high velocity into the nozzle in the manner of an ejector. The additional air imparts high velocity to the engine air within the nozzle so that the air from both sources acts on the fuel at the nozzle discharge orifice at high velocity to effect good atomization and spray pattern of the fuel. The nozzle is designed in such a manner as to cause no significant restriction of engine air flow through the nozzle under high power operation of the engine when the external air source is shut off.Type: GrantFiled: August 31, 1977Date of Patent: September 25, 1979Assignee: Parker-Hannifin CorporationInventors: Harold C. Simmons, Robert T. Mains, Frank Menti, Jr.