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| Number | Title | Issue Date |
| 6000453 | Apparatus for controlling thickness during lay-up and fabrication of press-cured composite articles A method and apparatus for controlling the thickness of press-cured composite articles during the manufacture thereof. The method includes a preparatory or prefabrication stage wherein prepreg plies are layed up and compacted to form a plurality of lamina... | 12/14/1999 |
| 5948023 | Monitoring and/or control system for a dual-engine helicopter for one engine inoperative flight operations A monitoring and control system for a dual-engine helicopter for OEI flight operations includes a parametric indicator operative in response to sensor signals for monitoring an engine gas generator speed parameter N1 during dual-engine and OEI flight oper... | 09/07/1999 |
| 5885059 | Composite tip cap assembly for a helicopter main rotor blade A composite tip cap assembly for a helicopter main rotor blade includes a composite main fairing, a unitary composite rib detail internally integrated in combination with the composite main fairing, a composite closure fairing bonded in combination with t... | 03/23/1999 |
| 5873546 | System and method for conducting one engine inoperative flight procedures training in a dual-engine helicopter A system and method for conducting one engine inoperative (OEI) flight procedures training in a dual-engine helicopter includes a multi-function OEI training switch that is operative to initiate OEI flight procedures training by selecting one of said engi... | 02/23/1999 |
| 5853152 | Collective detent system for vertical takeoff flight operations A collective detent system is incorporated in combination with the flight control system of a helicopter to enhance vertical takeoff flight operations of the helicopter. One embodiment of the collective detent system includes a collective control stick th... | 12/29/1998 |
| 5850991 | Mechanical emergency dual-release mechanism for an external cargo hook system One embodiment of a mechanical emergency dual-release mechanism for use in combination with a helicopter external cargo hook system that includes a cargo hook assembly that is operative to jettison an externally-attached cargo includes an interface member... | 12/22/1998 |
| 5838262 | Aircraft virtual image display system and method for providing a real-time perspective threat coverage display A virtual image display system for aircraft is operative to identify threat systems that are proximal the flight path of an aircraft when the aircraft is within the threat range of such threat systems. The virtual image display system is further operative... | 11/17/1998 |
| 5813292 | Method for fabricating a split path transmission system providing equal torque splitting between the split load paths of each gear train thereof at a predefined operating point A method for fabricating a split path transmission system that achieves equal torque splitting between the forward and aft split load paths of each gear train thereof at a predefined operating point by providing an intentional timing difference between ge... | 09/29/1998 |
| 5813300 | Precision center with an interchangeable double-arcuate floating collet A precision center for mounting a workpiece for precision machining thereof includes a modified head center, an actuating assembly, a drive assembly, and a double-arcuate floating collet. The actuating assembly is mounted within the modified head center a... | 09/29/1998 |
| 5811691 | Blade-mounted total pressure probe for a rotating blade A blade-mounted total pressure (BMTP) probe for a rotor blade comprises a base segment and an inlet segment. The base segment includes an interface surface having a planar configuration that is complementary to an aerodynamic surface of the rotor blade fo... | 09/22/1998 |
| 5788191 | Half-plow vortex generators for rotor blades for reducing blade-vortex interaction noise In one embodiment for a helicopter main rotor assembly, a half-plow vortex generator is mounted in combination with the upper aerodynamic surface of each main rotor blade and is operative to generate a primary corotating vortex of sufficient strength to i... | 08/04/1998 |
| 5785282 | Half-plow vortex generators for rotorcraft blades for reducing blade-vortex interaction noise In one embodiment for a helicopter main rotor assembly, a half-plow vortex generator is mounted in combination with the upper aerodynamic surface of each main rotor blade and is operative to generate a primary corotating vortex of sufficient strength to i... | 07/28/1998 |
| 5779288 | Low profile latch mechanism A low profile latch mechanism for an access panel that minimizes external structural discontinuities while concomitantly providing external access to engage and/or disengage the latch mechanism for closing and/or opening of the access panel. The latch mec... | 07/14/1998 |
| 5762691 | Aerodynamic-electrostatic particulate collection system An aerodynamic-electrostatic particulate collection system for high-efficiency collection of particulate debris generated in a machining area during machining of a workpiece, especially post-cure machining of a composite workpiece, that includes a vacuum ... | 06/09/1998 |
| 5759325 | Method for controlling thickness during lay-up and fabrication of press-cured composite articles A method and apparatus for controlling the thickness of press-cured composite articles during the manufacture thereof. The method includes a preparatory or prefabrication stage wherein prepreg plies are layed up and compacted to form a plurality of lamina... | 06/02/1998 |
| 5688353 | Method of fabricating a low total density, stabilized ramped honeycomb core for high pressure co-cure composite molding A method of fabricating a low total density, stabilized ramped honeycomb core for high pressure co-cure molding of a lightweight honeycomb core composite article includes forming the honeycomb core by net shaping stabilized honeycomb core material into a ... | 11/18/1997 |
| 5672112 | Zero clearance locking mechanism for a disconnect coupling device A zero clearance locking mechanism for a disconnect coupling device for a segmented driveshaft wherein the disconnect coupling device includes an input disconnect member having an input splined coupler integrated in combination therewith, an output discon... | 09/30/1997 |
| 5667565 | Aerodynamic-electrostatic particulate collection system An aerodynamic-electrostatic particulate collection system for high-efficiency collection of particulate debris generated in a machining area during machining of a workpiece, especially post-cure machining of a composite workpeice, that includes a vacuum ... | 09/16/1997 |
| 5617316 | Maintaining attitude error constant in Euler singularity protection A model-following aircraft control system in which a roll rate command in Euler coordinates is integrated to provide a bank angle command, which has actual bank angle subtracted therefrom to provide a command error that is converted back to aircraft body ... | 04/01/1997 |
| 5598760 | EOP scribe device The described embodiment of an edge-of-part (EOP) scribe device is operative to simultaneously scribe opposed trim lines in an oversized, cured leading-edge sheath mounted on a sheath mold assembly. The EOP scribe device includes a primary carriage assemb... | 02/04/1997 |
| 5580502 | Method of fabricating a composite article having an integral, co-cured composite stiffening member A method for fabricating a composite article having a composite stiffening member co-cure bonded in integral combination therewith wherein the composite article comprises outer mold line (OML) and inner mold line (IML) composite skins and a modified honey... | 12/03/1996 |
| 5575438 | Unmanned VTOL ground surveillance vehicle An unmanned aerial vehicle (UAV) has a toroidal fuselage and a rotor assembly having a pair of counter-rotating rotors secured in fixed coaxial combination with the toroidal fuselage to provide a vertical takeoff and landing (VTOL) capability for the UAV.... | 11/19/1996 |
| 5570631 | Apparatus for fabricating a helicopter main rotor blade Apparatus and methods for fabricating a helicopter main rotor blade include a compaction fixture for assembling and compacting blade subassembly components and a sheath spreading/insertion apparatus for spreading and inserting a leading-edge sheath onto t... | 11/05/1996 |
| 5569008 | Hybrid panel fastener and a retention mechanism for use in combination therewith for composite articles A hybrid panel fastener for use in conjunction with a nut and cage assembly for fastening and unfastening a composite access panel that is galvanically compatible with the composite access panel, suitable for low observability applications, and high cycle... | 10/29/1996 |
| 5544449 | Aircraft duplex hinge assembly An aircraft duplex hinge assembly (10 or 10') configured for use in aircraft, especially helicopters, having a compound curvature airframe (130) configuration wherein the edges of access panels (100) and the corresponding airframe apertures have a beveled... | 08/13/1996 |
| 5542820 | Engineered ceramic components for the leading edge of a helicopter rotor blade An engineered ceramic component for the leading edge of a rotor blade provides enhanced erosion protection therefor. In one embodiment, the engineered ceramic component includes a strain isolator member, an aerodynamic ceramic member, a first adhesive bon... | 08/06/1996 |
| 5528828 | Methods for fabricating a helicopter main rotor blade A method for fabricating a helicopter main rotor blade includes a compaction fixture for assembling and compacting blade subassembly components and a sheath spreading/insertion apparatus for spreading and inserting a leading-edge sheath onto the blade sub... | 06/25/1996 |
| 5527414 | Method for high pressure co-cure molding of lightweight honeycomb core composite articles having ramped surfaces utilizing low density, stabilized ramped honeycomb cores A method for high pressure co-cure molding of lightweight honeycomb core composite articles having ramped surfaces utilizing low total density, stabilized ramped honeycomb cores. The low total density, stabilized ramped honeycomb core is formed by net sha... | 06/18/1996 |
| 5487854 | Two-state co-cure method for fabricating a composite article A two-stage co-cure method for fabricating a composite article having a box-beam cross-sectional configuration wherein an outer shell portion of the composite article is fabricated and configured in the first stage to function as the tooling for completin... | 01/30/1996 |
| 5482602 | Broad-beam ion deposition coating methods for depositing diamond-like-carbon coatings on dynamic surfaces One broad-beam ion deposition coating method (10) for depositing diamond-like-carbon (DLC) coatings (124) on the dynamic surfaces (120S) of articles (120) subject to adherence difficulties includes the steps of: (12) preliminarily conditioning the dynamic... | 01/09/1996 |
| 5472386 | Stacked compound planetary gear train for an upgraded powertrain system for a helicopter A stacked compound planetary gear train for an upgraded powertrain system for a helicopter that provides an increased reduction ratio to accommodate the increased horsepower output of the augmented powerplant system while concomitantly providing a baselin... | 12/05/1995 |
| 5433070 | Flexible engine inlet duct mounting system A flexible engine inlet duct mounting system for integrating an engine inlet duct in combination with an engine system to minimize or eliminate turbulence-inducing structural discontinuities therebetween wherein non-turbulent intake airflow is provided to... | 07/18/1995 |
| 5431540 | Main rotor pitch control rod subassembly One embodiment of a main rotor pitch control rod subassembly includes an upper rod end segment having a bearing subassembly, a lower rod end segment having a bearing subassembly, an eccentric bushing disposed in rotatable combination with the upper rod en... | 07/11/1995 |
| 5431361 | Crashworthy cyclic control stick system for a helicopter A crashworthy cyclic control stick system (10) for use in combination with an energy attenuating stroking crew seat (100) includes a cyclic control stick (11) and an actuating/attenuating mechanism (50). The cyclic control stick (11) includes an upper tub... | 07/11/1995 |
| 5430937 | Apparatus and methods for fabricating a helicopter main rotor blade An apparatus for fabricating a helicopter main rotor blade includes a compaction fixture for assembling and compacting blade subassembly components and a sheath spreading/insertion apparatus for spreading and inserting a leading-edge sheath onto the blade... | 07/11/1995 |
| 5431538 | Hybrid composite flexbeam for a helicopter bearingless main rotor assembly A hybrid composite flexbeam for a soft inplane bearingless main rotor assembly has eight spanwise regions: a hub attachment region; a first tapered region; a second tapered region; an inboard transition region; a pitch region having a cruciform configurat... | 07/11/1995 |
| 5421656 | Spacer for a helicopter main rotor shaft A spacer (10) for a helicopter main rotor shaft (102) is mounted in combination with the main rotor shaft (102) and is operative to support the inner race (116) of the upper bearing assembly (110) of the main rotor shaft (102) and is concomitantly operati... | 06/06/1995 |
| 5419513 | Ancillary aerodynamic structures for an unmanned aerial vehicle having ducted, coaxial counter-rotating rotors An unmanned aerial vehicle (UAV) having a toroidal fuselage and a rotor assembly including counter-rotating rotors coaxially mounted with respect to the toroidal fuselage incorporates ancillary aerodynamic structures aerodynamically configured and mounted... | 05/30/1995 |
| 5417549 | Expandable spar filler block device An expandable spar filler block device for use in combination with a spar member of an articulated main rotor assembly of a helicopter. A preferred embodiment of the device includes first and second filler members and an expansion mechanism. Each filler m... | 05/23/1995 |
| 5411116 | Self-scavenging, hybrid lubrication subsystem A self-scavenging, hybrid lubrication subsystem for a main transmission gearbox includes a sump fabricated as an integral extension of the lower portion of the gearbox wherein the sump dynamic fluid level is above the gearbox bottom. The interior sidewall... | 05/02/1995 |
