Patent application number | Description | Published |
20080229726 | Two-Displacement Setting Variable Displacement Pump Used as Engine Over-Thrust Protection With Fuel System Thermal Benefit - A fuel delivery system ( | 09-25-2008 |
20090148309 | VARIABLE DISPLACEMENT PUMP HAVING A ROTATING CAM RING - Vane pump ( | 06-11-2009 |
20100322542 | SELF-ALIGNING JOURNAL BEARING - A rotary machine includes a housing, and a rotating component received therein for rotation relative to the housing. A shaft imparts rotational movement to the rotating component around a first axis from an associated motive input. A bearing assembly is interposed between the rotating shaft and the housing and the bearing assembly includes a bearing member that is self-aligning. The self-aligning bearing assembly includes a bearing member having a recess extending substantially parallel to the first axis, and a journal sleeve received in the recess and interposed between the shaft and the bearing member. The journal sleeve is fixed to the shaft for rotation therewith and includes a flexible joint connection with the shaft to permit self-alignment of the shaft and bearing. | 12-23-2010 |
20110036781 | FILTER ASSEMBLY FOR FUEL SUPPLY TO ACTUATORS AND FUEL CONTROL SYSTEM OF AIRCRAFT ENGINE AND METHOD - A filter assembly for a fuel delivery system for actuators and fuel control system of an aircraft engine includes a wash flow filter. Fuel flow velocity is increased through the filter through use of a recirculating passage that is effectively achieved through use of an ejector pump. A portion of the pressurized fuel delivered by the main fuel pump is diverted and serves as a motive fluid that scavenges unfiltered flow from downstream of the filter and recirculates or discharges the recirculated flow to an inlet of the filter. This provides increased velocity to maintain sufficient washing of the filter openings. | 02-17-2011 |
20110150682 | CAM BEARING FLOW CONTROL FOR ROTATING CAM RING VANE PUMP - A pump assembly includes a housing having a chamber in communication with an inlet and an outlet. A rotating ring, variable displacement vane pump is received in the chamber. The pump, and particularly the rotating ring, is supported by a fluid bearing in the chamber. A control is provided for selectively altering fluid flow to the bearing in response to one of hydrodynamic bearing pressure, boost flow pressure, and the pump stroke. | 06-23-2011 |
20120156066 | CONCENTRIC MULTI-STAGE CENTRIFUGAL PUMP WITH START STAGE - A multi-stage concentric centrifugal pump includes a start stage. An inner impeller stage is driven by drive shaft while an electric motor drive is selectively switched on for starting, and off for normal operation to drive an outer impeller stage. The electric motor driven outer stage builds required system pressure and flow at engine starting, and then permits the electric motor to be switched off and allow the outer stage to act as a free rotating disk to improve operating efficiency of the pump. | 06-21-2012 |
20130269365 | AIRCRAFT ENGINE FUEL PUMP BEARING FLOW AND ASSOCIATED SYSTEM AND METHOD - An assembly or system is provided for selectively regulating journal bearing lubrication between at least first and second levels in an aircraft engine. A high pressure pump includes movable portions at least in part supported by a journal bearing. A selector valve is configured to selectively supply lubrication flow to the journal bearing. In addition, a relief valve is configured to receive a signal from the selector valve defining a pressure level at which the relief valve should relieve pressure. | 10-17-2013 |
20140248171 | VARIABLE DISPLACEMENT PUMP HAVING ROTATING CAM RING - Vane pump mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring is supported by a journal bearing. A relatively low sliding velocity is imposed between the cam ring and the vanes). This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits. | 09-04-2014 |
20150075634 | HYDROMECHANICAL PRESSURE COMPENSATION CONTROL OF A VARIABLE DISPLACEMENT PUMP IN A CENTRIFUGAL PUMPING AND METERING SYSTEM AND ASSOCIATED METHOD - A pump assembly includes a pump unit having a centrifugal pump and a variable pump supplying pressurized flow. A fuel control assembly receives flow from the pump unit and includes at least one metering valve and at least one throttling valve. A control for the variable pump receives first and second pressure signals indicative of a pressure differential across the throttling valve, or across the metering valve/throttling valve combination, for altering operation of the variable pump in response to the pressure differential. | 03-19-2015 |