公开(公告)号：US20220010848A1

公开(公告)日：2022-01-13

申请号：US16926451

申请日：2020-07-10

Applicant: Bell Textron Inc.

Inventor： Gilberto Morales ,  Carlos Alexander Fenny ,  Cody Anderson

IPC: F16D41/07 ,  B64D35/00

Abstract: A clutch has an inner race, an outer race spaced from the inner race and forming a radial cavity between the races, and a plurality of sprags disposed in the radial cavity. The sprags have a different coefficient of thermal expansion (CTE) from the inner race, the outer race, or both races, and a sprag cage retains the sprags at a uniform spacing within the radial cavity. When the clutch is at a first temperature, a gap exists between the sprags and the inner race, between the sprags and the outer race, or between the sprags and both races, and the clutch is disengaged. When the clutch is at a second temperature the sprags are in contact with both the races, and the clutch is engaged.

公开(公告)号：US11339836B2

公开(公告)日：2022-05-24

申请号：US16926451

申请日：2020-07-10

Applicant: Bell Textron Inc.

Inventor： Gilberto Morales ,  Carlos Alexander Fenny ,  Cody Anderson

IPC: F16D41/07 ,  B64D35/00 ,  F16D41/08 ,  F16D43/25 ,  F16D41/06

Abstract: A clutch has an inner race, an outer race spaced from the inner race and forming a radial cavity between the races, and a plurality of sprags disposed in the radial cavity. The sprags have a different coefficient of thermal expansion (CTE) from the inner race, the outer race, or both races, and a sprag cage retains the sprags at a uniform spacing within the radial cavity. When the clutch is at a first temperature, a gap exists between the sprags and the inner race, between the sprags and the outer race, or between the sprags and both races, and the clutch is disengaged. When the clutch is at a second temperature the sprags are in contact with both the races, and the clutch is engaged.

公开(公告)号：US11149803B1

公开(公告)日：2021-10-19

申请号：US16894847

申请日：2020-06-07

Applicant: Bell Textron Inc.

Inventor： Gilberto Morales ,  Carlos Alexander Fenny

IPC: F16D41/069 ,  F16D48/06 ,  F16D28/00 ,  F16D41/06 ,  F16D121/28

Abstract: A sprag clutch has an inner race, an outer race, and a radial cavity between the races. A plurality of sprags are disposed in the radial cavity, and each sprag is configured to rotate about an axis of rotation that is perpendicular to its longitudinal axis. A sprag cage retains each of the plurality of sprags at a uniform spacing within the radial cavity, and a plurality of actuators are positioned to exert or withdraw a force upon a corresponding sprag.

公开(公告)号：US11137032B1

公开(公告)日：2021-10-05

申请号：US16887526

申请日：2020-05-29

Applicant: Bell Textron Inc. ,  United States of America as represented by the Secretary of the Army

Inventor： Cody Anderson ,  Gilberto Morales ,  Lawrence Mark Zunski

IPC: F16C19/04 ,  B64C27/06 ,  F16C19/18 ,  F16C35/06 ,  F16C35/07 ,  F16C37/00 ,  F16C35/073 ,  F16C35/067 ,  F16C33/58

Abstract: An example of a ceramic bearing system includes a shaft comprising two radially extending shoulders that define a channel therebetween, a first tolerance ring disposed in the channel of the shaft, and a bearing assembly comprising a ceramic bearing. The bearing assembly is positioned around the first tolerance ring and has an axial length that is longer than an axial length of the first tolerance ring.

公开(公告)号：US20210094698A1

公开(公告)日：2021-04-01

申请号：US16585891

申请日：2019-09-27

Applicant: Bell Textron Inc.

Inventor： Carlos Alexander Fenny ,  Gilberto Morales ,  Ryan Thomas Ehinger

IPC: B64D31/14 ,  B64D27/14 ,  B64C27/06 ,  B64D41/00 ,  B64D35/02 ,  B64D35/08 ,  F16D41/12 ,  F16D25/12 ,  F16D25/00

Abstract: A powertrain for a rotorcraft includes first and second engines and a transmission system that includes a main rotor gearbox, a first freewheeling unit coupling the first engine to the main rotor gearbox and a second freewheeling unit coupling the second engine to the main rotor gearbox. The first freewheeling unit has a driving configuration and a bypass configuration. In a preflight configuration of the rotorcraft, the first engine provides power to at least one auxiliary component with the first freewheeling unit in the bypass configuration while the second engine provides power to the main rotor. In a flight configuration of the rotorcraft, the first engine provides power to the main rotor with the first freewheeling unit in the driving configuration while the second engine also provides power to the main rotor.