1
David W Skelly, Bangalore A Nagaraj, David J Wortman, David V Rigney, Seetha R Mannava, Rudolfo Viguie, Robert W Bruce, Warren A Nelson, Curtis A Johnson, Bhupendra K Gupta: Enhanced thermal barrier coating system. General Electric Company, Jerome C Squillaro, David L Narciso, May 30, 1995: US05419971 (41 worldwide citation)

An article having a substrate is protected by a thermal barrier coating system. An interfacial layer contacts the upper surface of the substrate. The interfacial layer may comprise a bond coat only, or a bond coat and an overlay coat. The interfacial layer has on its upper surface a preselected, con ...


2
Seetha R Mannava, James D Risbeck, Larry G Jacobs: Distortion control for laser shock peened gas turbine engine compressor blade edges. General Electric Company, Andrew C Hess, David L Narciso, July 2, 1996: US05531570 (39 worldwide citation)

A method for counteracting distortion of the airfoil caused by laser shock peening a gas turbine engine compressor metallic airfoil along its leading and/or trailing edge to form laser shock peened surfaces extending radially along at least a portion of the edges with a region having deep compressiv ...


3
Paul J E Monson, Todd J Rockstroh, Seetha R Mannava, Robert E Baeumel: Method for making a gas turbine engine component. General Electric Company, Charles L Moore Jr, Jerome C Squillaro, May 19, 1992: US05113582 (22 worldwide citation)

A method for making a gas turbine engine component includes the steps of: providing an unfinished gas turbine engine component; directing a laser beam on a selected surface portion of the engine component to prepare the selected surface portion before at least one of a subsequent coating and bonding ...


4
Paul J E Monson, Todd J Rockstroh, Seetha R Mannava, Robert E Baeumel: Method for making a gas turbine engine component. General Electric Company, Charles L Moore Jr, Jerome C Squillaro, May 18, 1993: US05210944 (19 worldwide citation)

A method for making a gas turbine engine component includes the steps of: providing an unfinished gas turbine engine component; directing a laser beam on a selected surface portion of the engine component to prepare the selected surface portion before at least one of a subsequent coating and bonding ...


5
Seetha R Mannava, Ernest B Cooper Jr: Laser-assisted chemical vapor deposition. General Electric Company, Jerome C Squillaro, Carmen Santa Maria, December 29, 1992: US05174826 (19 worldwide citation)

An apparatus for performing laser-assisted deposition of material on a target surface includes a reaction chamber enclosure having a window therein. The reaction chamber is partially evacuated, and a reactive gas is introduced into the reaction chamber enclosure. A laser directs a laser beam into th ...


6
Seetha R Mannava, Joseph W Erkes: Torque measurement method and apparatus. General Electric Company, John F Ahern, June 25, 1985: US04525068 (15 worldwide citation)

When a torque is transmitted through a body, the body tends to twist in proportion to the torque and to the characteristics of the material. Doppler measurements made at points separated from each other on a body differ slightly due to the applied torque by the reduced motion of the body at points c ...


7
Seetha R Mannava, John F McDonald, Henry A Scarton: Acoustic emission analyzer. General Electric Co, Rensselaer Polytechnic Institute, John F Ahern, Paul Checkovich, November 5, 1985: US04551018 (12 worldwide citation)

A periodic structure such as a diffraction grating is disposed on the surface of an object from which acoustic emissions are to be detected. A plane monochromatic light beam is incident on the periodic structure and forms a number of Bragg diffraction orders at predetermined angles. A detector posit ...


8
Seetha R Mannava, John F McDonald, Henry A Scarton: Laser doppler velocimeter for measuring torsional vibration. General Electric Co, Rensselaer Polytechnic Institute, John F Ahern, Paul Checkovich, November 5, 1985: US04551017 (11 worldwide citation)

The velocity and change in velocity of a rotating or otherwise moving surface is measured by a laser Doppler technique. In particular, a diffraction grating is formed on the moving surface either by machining processes or by affixing a ready-made grating thereto. The grating surface exhibits periodi ...


9
Paul J E Monson, Seetha R Mannava, Harry J Heckler, Robert E Baeumel: Method for making a gas turbine engine component with a textured surface. General Electric Company, Charles L Moore Jr, Jerome C Squillaro, June 9, 1992: US05120395 (5 worldwide citation)

A method for making a gas turbine engine component includes the steps of: providing an unfinished gas turbine engine component; and selectively patterning a selected surface portion of the engine component by focusing a laser beam on the selected surface portion to improve lubricant distribution bet ...


10
Todd J Rockstroh, James G Kelley, Ralph M Somers, John N Minnich, Seetha R Mannava: Laser apparatus including crystal protection circuitry and method of operation thereof. General Electric Company, Jerome C Squillaro, Charles L Moore Jr, January 5, 1993: US05177756 (2 worldwide citation)

A laser apparatus is disclosed which is capable of protecting the laser slab or rod crystal within the laser from damage due to overheating when the laser malfunctions in a manner such that laser output ceases while optical pumping of the laser crystal continues. The laser apparatus includes a laser ...