Patent application number | Description | Published |
20110015034 | MULTI-RATIO ROTORCRAFT DRIVE SYSTEM AND A METHOD OF CHANGING GEAR RATIOS THEREOF - A multi-ratio rotorcraft drive system and a method of changing gear ratios thereof are disclosed. According to one embodiment, the multi-ratio rotorcraft drive system comprises a rotor system comprising one or more rotors and one or more engines. Each engine of the one or more engines is coupled to the rotor system through a multi-ratio transmission. The multi-ratio transmission comprises an output shaft coupled to the rotor system, an input shaft coupled to a respective engine of the one or more engines, a high speed clutch integrated into a high speed gear train, and a low speed clutch integrated into a low speed gear train. The high speed clutch and the low speed clutch are freewheeling clutches without a friction plate and are capable of disconnecting the output shaft and the input shaft in an overrunning condition when the output shaft spins faster than the input shaft. The multi-ratio transmission shifts between the high speed gear train and the low speed gear train by engaging or disengaging the high speed clutch and modulating speed of the coupled engine. | 01-20-2011 |
20110030503 | TRANSMISSION HOUSING ASSEMBLY HAVING IMPROVED BEARING LINER - A housing assembly for use in a rotorcraft includes a housing having an opening, a bearing configured to radially and/or axially support a shaft that is adapted to rotate, the bearing disposed within the opening of the housing, and a liner arranged between the housing and the bearing. The liner is made of a material selected from the group consisting of ceramic material, ceramic coated material, ceramic and metallic hybrid material, lightweight metallic material, lightweight metallic alloy material and lightweight metallic coated material. | 02-10-2011 |
20120208670 | MULTI-RATIO ROTORCRAFT DRIVE SYSTEM AND A METHOD OF CHANGING GEAR RATIOS THEREOF - A multi-ratio rotorcraft drive system and a method of changing gear ratios thereof are disclosed. According to one embodiment, the multi-ratio rotorcraft drive system comprises a rotor system comprising one or more rotors and one or more engines. Each engine of the one or more engines is coupled to the rotor system through a multi-ratio transmission. The multi-ratio transmission comprises an output shaft coupled to the rotor system, an input shaft coupled to a respective engine of the one or more engines, a high speed clutch integrated into a high speed gear train, and a low speed clutch integrated into a low speed gear train. The high speed clutch and the low speed clutch are freewheeling clutches without a friction plate and are capable of disconnecting the output shaft and the input shaft in an overrunning condition when the output shaft spins faster than the input shaft. | 08-16-2012 |
20120208673 | MULTI-RATIO ROTORCRAFT DRIVE SYSTEM AND A METHOD OF CHANGING GEAR RATIOS THEREOF - A multi-ratio rotorcraft drive system and a method of changing gear ratios thereof are disclosed. According to one embodiment, the multi-ratio rotorcraft drive system comprises a rotor system comprising one or more rotors and one or more engines. Each engine of the one or more engines is coupled to the rotor system through a multi-ratio transmission. The multi-ratio transmission comprises an output shaft coupled to the rotor system, an input shaft coupled to a respective engine of the one or more engines, a high speed clutch integrated into a high speed gear train, and a low speed clutch integrated into a low speed gear train. The high speed clutch and the low speed clutch are freewheeling clutches without a friction plate and are capable of disconnecting the output shaft and the input shaft in an overrunning condition when the output shaft spins faster than the input shaft. | 08-16-2012 |
20120214642 | MULTI-RATIO ROTORCRAFT DRIVE SYSTEM AND A METHOD OF CHANGING GEAR RATIOS THEREOF - A multi-ratio rotorcraft drive system and a method of changing gear ratios thereof are disclosed. According to one embodiment, the multi-ratio rotorcraft drive system comprises a rotor system comprising one or more rotors and one or more engines. Each engine of the one or more engines is coupled to the rotor system through a multi-ratio transmission. The multi-ratio transmission comprises an output shaft coupled to the rotor system, an input shaft coupled to a respective engine of the one or more engines, a high speed clutch integrated into a high speed gear train, and a low speed clutch integrated into a low speed gear train. The high speed clutch and the low speed clutch are freewheeling clutches without a friction plate and are capable of disconnecting the output shaft and the input shaft in an overrunning condition when the output shaft spins faster than the input shaft. | 08-23-2012 |
20130117997 | System and Method for Installing a Fastener Rod - A system and method for installing a fastener rod is provided. In one embodiment a fastener rod starter apparatus is provided and may include a first end for engaging a fastener rod, a second end for insertion into an insertion hole, and an elongated body of closed cell foam having sufficiently low density and high compressibility to displace fluid in the insertion hole and be compressed to allow installation of the fastener rod into the insertion hole. A method for installing a fastener rod may include lubricating an insertion hole with a fluid and inserting a starter element into the insertion hole. The starter element may have sufficiently low density and high compressibility to displace the fluid in the insertion hole and be compressed by the fastener rod inserted into the insertion hole. | 05-16-2013 |
20140001307 | Aircraft Gearbox Lubrication System | 01-02-2014 |
20140191079 | Disconnecting a Rotor - According to one embodiment, a clutch may be coupled between a rotor system and a power train of a rotorcraft. The clutch may be operable to disengage the rotor system from the power train during operation of the power train. A clutch control system in communication with the clutch and include a rotorcraft condition sensor operable to sense an operating condition of the rotorcraft and a control unit operable to prevent the clutch from disengaging the rotor system from the power train if the operating condition of the rotorcraft fails to satisfy a predetermined criterion. | 07-10-2014 |
20140305740 | DEBRIS DETECTOR FOR NON-FERROUS BEARINGS - A system and method to detect non-ferrous debris from a non-ferrous roller bearing element. The system includes a trap in fluid communication with a lubrication fluid of the non-ferrous bearing and a sensor operably associate with the trap. The method includes trapping the non-ferrous material debris in the lubrication fluid with the trap and triggering the sensor upon detection of the non-ferrous material debris trapped within the trap. | 10-16-2014 |
Patent application number | Description | Published |
20130098732 | HYBRID OVERRUNNING CLUTCH ASSEMBLY AND METHOD OF MAKING SAME - A hybrid overrunning clutch includes a metal outer race and a composite outer ring that are each sized and configured such that the metal race generates a preload on the composite outer race throughout the operational temperature of the clutch. The composite outer ring significantly reduces that total weight of the clutch, as compared to a completely metal outer race. The present application further includes a method of assembling the metal outer race and composite outer ring so that thermal expansion of the metal outer race creates the preload in the composite outer ring. The present application also includes a method of designing a hybrid overrunning clutch. | 04-25-2013 |
20140116652 | Passive Cooling of Transmission Using Mast Mounted Heat Pipes - A passive cooling system for an aircraft includes a rotor assembly and a closed heat pipe. The closed heat pipe is carried by the rotor assembly and configured to extract heat energy from a heat source positioned away from the rotor assembly and configured to dissipate the heat energy through the rotor assembly. | 05-01-2014 |
20140208861 | System and Method for Improving a Workpiece - A method of modifying a workpiece includes providing a workpiece, determining a load stress profile associated with a load condition, the load stress profile comprising a load stress greater than a material stress limit of the workpiece, determining a residual stress profile, the residual stress profile comprising a residual stress less than the material stress limit of the workpiece, and providing the workpiece with the residual stress profile, wherein a sum of the load stress and the residual stress is less than the material stress limit of the workpiece. | 07-31-2014 |
20150219524 | SYSTEM AND METHOD FOR IMPROVING A WORKPIECE - A method of modifying a workpiece includes providing a workpiece, determining a load stress profile associated with a load condition, the load stress profile comprising a load stress greater than a material stress limit of the workpiece, determining a residual stress profile, the residual stress profile comprising a residual stress less than the material stress limit of the workpiece, and providing the workpiece with the residual stress profile, wherein a sum of the load stress and the residual stress is less than the material stress limit of the workpiece. | 08-06-2015 |