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公开(公告)号：US11466788B2
公开(公告)日：2022-10-11
申请号：US16668081
申请日：2019-10-30
发明人： Jeremy Kracke
摘要： A pressure relief valve assembly comprising a valve housing within which is provided a primary pressure relief valve having a valve ball and a valve spring, the valve spring biasing the valve ball in a first direction into a valve seat to prevent the passage of fluid from a fluid line through the valve, and wherein the spring force is selected such that a fluid force above a predetermined set point acting against the ball in a second direction opposite the first direction causes the ball to move out of the valve seat against the spring force to allow fluid to flow from the fluid line through the valve seat and through the valve, and wherein a secondary valve is positioned relative to the primary valve to retain fluid around the valve spring of the primary valve at a fluid force below the predetermined set point.
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公开(公告)号：US20220228414A1
公开(公告)日：2022-07-21
申请号：US17572761
申请日：2022-01-11
摘要： A door arrangement, for use on an aircraft, includes a door and an actuation arrangement. The arrangement is configured to move the door between an open position and a closed position. The actuation arrangement includes: a first member coupled to the door such that movement of the first member moves the door; a second member pivotally coupled to the first member and arranged to drive movement of the first member, wherein the second member is movable between a first position which corresponds to the door being in an open position and a second position which corresponds to the door being in a closed position; and an actuator arranged to rotate the second member between the first position and second positions. The door arrangement further comprises a fixed stop.
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公开(公告)号：US20220145968A1
公开(公告)日：2022-05-12
申请号：US17583669
申请日：2022-01-25
发明人： Stephen DAVIES
摘要： A linear actuator includes a screw shaft comprising a screw thread and having a longitudinal axis A, a nut movable along the screw shaft from a retracted position to an extended position, and a plurality of rollers movable with the nut. Each roller includes a cylindrical surface configured to roll along one or more flanks of the screw thread, such that rotation of the screw shaft causes the rollers to roll along the flank(s) so that the nut translates in an axial direction along the screw shaft. The screw thread has a variable lead angle. The actuator can be part of a power door opening system of an aircraft.
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公开(公告)号：US11286040B2
公开(公告)日：2022-03-29
申请号：US16411567
申请日：2019-05-14
发明人： Antony Morgan
摘要： An actuator system for controlling a movable surface has a main shaft connected between a power drive unit and the movable surface to transmit a command from the power drive unit to move the movable surface. If a failure in the main shaft is detected a failure control device connects a secondary shaft from the movable surface to the power drive unit e.g. by releasing a solenoid which releases gears so as to permit differential rotations between an outer ring and a sun gear of a planetary gear system, within prescribed limits. When these limits are exceeded, the solenoid brake is de-energised braking the planetary gear outer ring and tying the gears through an epicycle ratio corresponding to the ratio of gears connecting the main and secondary shafts. The gear system acts as a low mass asymmetry brake that allows post-failure operation of the surface control.
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公开(公告)号：US11239770B2
公开(公告)日：2022-02-01
申请号：US16721191
申请日：2019-12-19
发明人： Maamar Benarous
摘要： There is provided an electric motor comprising a rotor, a stator and a motor controller. The stator comprises a substantially cylindrical body, a plurality of teeth extending from the substantially cylindrical body in a radial direction, one or more first sets of electrical windings that are wound around said teeth and configured to drive the rotor, and one or more second sets of electrical windings electrically separate from the first set of electrical windings. The second set of electrical windings on the stator are electrically connected to the motor controller such that energy produced by the electric motor during a regenerative mode of operation in use is diverted to the second set of electrical windings on the stator for dissipating the energy produced in the regenerative mode.
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公开(公告)号：US11235886B2
公开(公告)日：2022-02-01
申请号：US16123272
申请日：2018-09-06
发明人： Graham Hardwick , James Thomas , Herve Menaut
摘要： A monitoring system is disclosed for identifying an operating state of a motor, the system comprising: a speed sensor for determining a speed of a motor and providing a speed signal as a function of time in response thereto, and a processor configured to identify a symmetric and/or an asymmetric oscillation of the speed signal as a function of time.
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公开(公告)号：US11231089B2
公开(公告)日：2022-01-25
申请号：US16718248
申请日：2019-12-18
发明人： Stephen Davies
摘要： An epicyclic gear system having an epicyclic gear stage that includes a sun gear; a carrier, wherein the carrier comprises a plurality of planet gear axles; a plurality of planet gears, each planet gear being located on one of the planet gear axles; a ring gear. The stage also includes an output shaft, wherein the output shaft is connected to the carrier via a biasing mechanism positioned between the carrier and the output shaft, the biasing mechanism being configured to urge the carrier and the output shaft away from one another.
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公开(公告)号：US11174901B2
公开(公告)日：2021-11-16
申请号：US16711856
申请日：2019-12-12
发明人： Jeremy Kracke
摘要： A torque limiting device comprises rotationally mounted input and output shafts, an intermediate drive element rotationally coupled to the input shaft and a plurality of jammer elements mounted between the intermediate drive element and the output shaft. A spring mechanism is connected between the input shaft and the intermediate drive element for aligning the intermediate drive element and the input shaft in a driving configuration in which rotation of the input shaft at a torque below a predetermined threshold is transmitted to the output shaft via the jammer element, but in which torque above the predetermined threshold moves the input shaft rotationally relative to the intermediate drive element against the force of the spring mechanism so as to disengage that jammer elements from driving engagement with the output shaft.
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公开(公告)号：US20210293312A1
公开(公告)日：2021-09-23
申请号：US17205187
申请日：2021-03-18
发明人： Andrew HAWKSWORTH
摘要： A travel stop assembly for an actuator. The travel stop assembly includes a housing, a shaft provided along a longitudinal axis (A). The shaft has a first end and a second end. The travel stop assembly also includes a first nut and a second nut provided on the shaft, wherein there is provided a first gap (Ag) between the first nut and the second nut. The travel stop assembly also includes a second gap (Sg) provided between the second nut and the first end of the shaft, and means for adjusting the position of the first nut and the second nut such that the second gap (Sg) is maintained.
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公开(公告)号：US20210285402A1
公开(公告)日：2021-09-16
申请号：US17330871
申请日：2021-05-26
发明人： Antony MORGAN
IPC分类号： F02K1/76
摘要： A thrust reverser is described that comprises a new type of locking means for locking an actuator in position so that maintenance can be performed on the machine. The locking means comprises a removable locking device for preventing movement of an actuator. The locking means may also function in one configuration as an end cap. An actuator is also described comprising a removable torque limiting device for limiting torque of the actuator.
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