ANDREW KOZAK
Engineering in Canton, MA

4901520, Feb 20, 1990

Aug 12, 1988

7/231774

Andrew Kozak - Canton MA
George Minkkinen - Fairfield CT

Avco Corporation - Providence RI

F02C 302

60 3902

A system for cooling a turbine assembly in a gas turbine engine. The system has a bleed means for bleeding a portion of a first core of gas exited from a compressor section of the engine to thereby form a second core of gas. The second core of gas is additionally pressurized by a second compressor means to increase the pressure of the second core of gas. The second core of gas is then delivered to the turbine section for cooling of the engine such that the second core of coolant gas has a higher pressure than the first core of gas exiting the combustor section.

4768922, Sep 6, 1988

Sep 15, 1986

6/907902

Andrew A. Kozak - Canton MA
George Minkkinen - Fairfield CT

Avco Corporation - Providence RI

F01D 1714

415160

A variable stator assembly is provided for a gas turbine engine. The assembly comprises at least one winglet disposed on the radially inner end of each variable stator blade and/or on the radially outer end of each variable stator blade. The assembly further comprises at least one shroud disposed substantially adjacent and parallel to the associated winglet and within the flow path relative to the winglet. In a preferred embodiment, the assembly comprises both inner and outer winglets and inner and outer shrouds, with the shrouds being disposed intermediate the pair of winglets. The downstream edge of the shroud is configured to be substantially adjacent to the upstream edge of each variable stator blade through the full range of movement of each variable stator blade. Additionally, the shroud extends into the flow path between adjacent variable stator blades.