1
Alan R Stuart: High bypass ratio counterrotating turbofan engine. General Electric Company, Derek P Lawrence, December 13, 1988: US04790133 (140 worldwide citation)

A gas turbine engine comprising a core gas generator engine for generating combustion gases, an additional power turbine, an additional fan section, and a booster compressor is disclosed. The power turbine includes first and second counterrotatable turbine blade rows effective for rotating first and ...


2
Douglas S Steele, Larry C Howington, James W Schuler, Joseph J Sostarich, Charles R Wojciechowski, Theodore W Sippel, Joseph M Portaz, Ralph G Isaacs, Henry J Scudder III, Thomas G Kincaid, Kristina H V Hedengren, Rudolph A A Koegl, John P Keaveney, Joseph Czechowski III, John R Brehm, James M Brown Jr, David W Oliver, George E Williams, Richard D Miller: X-ray inspection system. General Electric Company, Derek P Lawrence, Nathan D Herkamp, February 7, 1989: US04803639 (124 worldwide citation)

An X-ray inspection system for manually or automatically performing digital fluoroscopy inspections and/or computed tomography inspections by X-ray examination of manufactured parts incorporates a computer system which automatically analyzes the inspected parts for flaws. The system includes apparat ...


3
Arthur P Adamson: Differential geared engine. General Electric Company, Robert C Lampe Jr, Donald W Walk, Derek P Lawrence, February 24, 1981: US04251987 (121 worldwide citation)

A gas turbine engine comprising a fan, a compressor and a turbine, wherein the torque requirements of the fan or compressor can be modulated, is provided with differential gearing to transmit all of the fan and compressor power requirements from the turbine. The differential gearing maintains an adj ...


4
James E Eiswerth: Tip cap for a rotor blade and method of replacement. General Electric Company, Francis L Conte, Derek P Lawrence, June 28, 1983: US04390320 (113 worldwide citation)

A tip cap for a rotor blade which includes at least one radially extending rib having an abrasive coating thereon for providing a close clearance seal between the rotor blade and the surrounding shroud and also for cleaning the shroud of deposits of material thereon. The tip cap can include a coolin ...


5
Ernest Elovic: Cooling air cooler for a gas turbofan engine. General Electric Company, Robert C Lampe Jr, Donald W Walk, Derek P Lawrence, March 10, 1981: US04254618 (92 worldwide citation)

An air-to-air heat exchanger is provided for a gas turbofan engine to significantly reduce the quantity of cooling air that is presently needed to effectively cool the hot turbine parts. Typically, the turbine is internally cooled with air bled from the compressor which, though cooler than the turbi ...


6
John W Vinson, Pamela C Kwong, Paul E Sabla: Gas turbine engine carburetor. General Electric Company, Francis L Conte, Derek P Lawrence, March 31, 1987: US04653278 (88 worldwide citation)

A gas turbine engine carburetor including an annular swirler and a new and improved fuel injector cooperating therewith is disclosed which is effective for providing low BTU gaseous fuel to a combustor. The swirler includes a plurality of circumferentially spaced swirler vanes effective for channeli ...


7
Edward S Hsia, Raghuram J Emani, John H Starkweather: Multiple-impingement cooled structure. General Electric Company, Gregory A Welte, Derek P Lawrence, March 4, 1986: US04573865 (81 worldwide citation)

A multiple-impingement cooled structure, such as for use as a turbine shroud assembly. The structure includes a plurality of baffles which define with an element to be cooled, such as a shroud, a plurality of cavities. Impingement cooling air is directed through holes in one of the baffles to imping ...


8
James E Sidenstick: Method and apparatus for forming diffused cooling holes in an airfoil. General Electric Company, Dana F Bigelow, Derek P Lawrence, April 8, 1980: US04197443 (80 worldwide citation)

The electrode of an electrodischarge machining apparatus has a plurality of teeth which are substantially laterally tapered to increasing width toward the machine-held base end. Further, the plane of the tapered portions is inclined to that of the free end portions, which precede the tapered portion ...


9
Thomas L Scott: Shielded combustor. General Electric Company, Francis L Conte, Derek P Lawrence, February 4, 1986: US04567730 (77 worldwide citation)

A radial lip of a high temperature combustor liner is mechanically locked in a radially directed capture slot in a supporting shell of a combustor. In one embodiment, the capture slot is formed at abutting edges of shell sections which are joined by a weld bead. The weld bead is accessible for grind ...


10
Martin C Hemsworth, Robert J Corsmeier, Ambrose A Hauser: Ceramic turbine shroud assembly. General Electric Company, Robert C Lampe Jr, Derek P Lawrence, May 2, 1978: US04087199 (76 worldwide citation)

A high temperature turbine shroud assembly for an aircraft gas turbine engine comprising a plurality of arcuate ceramic blocks arranged in a ring. The blocks are supported by a pair of annular support members which retain the blocks in the assembly. Spring-like fingers associated with the support me ...