公开(公告)号：US12221207B2

公开(公告)日：2025-02-11

申请号：US18347737

申请日：2023-07-06

Applicant: Textron Innovations Inc.

Inventor： Amarjit Kizhakkepat ,  Mark Adam Wiinikka

IPC: B64C27/37 ,  B64C27/35

Abstract: A back-to-back spherical bearing assembly for a rotary system of a rotary aircraft includes a spherical bearing member having an interior cavity and a spherical bearing surface defining a bearing focal point, a first elastomeric and a second elastomeric bonded to the spherical bearing surface on opposite sides of the bearing focal point, an inboard attachment bonded to the first elastomeric and configured to be secured to a rotor hub of the rotary system, and an outboard attachment bonded to the second elastomeric and configured to be secured to a rotor blade of the rotary system.

公开(公告)号：US11235870B2

公开(公告)日：2022-02-01

申请号：US16022375

申请日：2018-06-28

Applicant: Textron Innovations Inc.

Inventor： Mark Adam Wiinikka ,  Matthew Curtis Ledbetter

IPC: B64C27/32

Abstract: A rotorcraft having a rotor system including a yoke, a plurality of grip assemblies, each of which is hingedly attach a rotor blade to the yoke, a plurality of flap stops, each flap stop attached to a respective grip assembly, a channel bounded by an upper and lower retaining surfaces, and a droop ring slideably disposed in the channel of the droop limiting system. The droop ring has a body with an inner surface, an outer surface, and a first end surface between the inner surface and the outer surface. The droop ring further has a first wear element removably disposed at the first end surface and extending above the first end surface and spaces the first end surface apart from the channel. Each flap stop is arranged to contact the outer surface of the droop ring and limit a downward droop of the respective rotor blade.

公开(公告)号：US10689104B2

公开(公告)日：2020-06-23

申请号：US15590736

申请日：2017-05-09

Applicant: Textron Innovations Inc.

Inventor： Glenn Alan Shimek ,  Nathan Patrick Green ,  Robert Alan Self ,  Mark Adam Wiinikka

IPC: B64C27/51 ,  B64C27/82 ,  B64C27/54 ,  B64C27/48 ,  B64C27/473 ,  B64C27/39 ,  B29L31/08 ,  B64C27/32 ,  B64C27/00

Abstract: A system and method for attaching a damper to a tail rotor blade includes a cuff that is integral with the rotor blade. The cuff has upper and lower lugs formed by extending a skin over a blade core of the rotor blade. The skin extends past the blade core to the root end of the rotor blade. The rod end of the damper is inserted into an opening between the lugs. The rod end of the damper is coupled to the blade with a bolt through aligned holes in the lugs. The cuff also couples the rotor blade to the grip inside the cuff. The cuff includes a same material as that forming the skin. Sacrificial buffer pads are applied to interior faces of the lugs. The buffer pads permit a distance between the lugs to be machined within a tolerance without removing skin from the cuff.

公开(公告)号：US20210403152A1

公开(公告)日：2021-12-30

申请号：US17472001

申请日：2021-09-10

Applicant: Textron Innovations Inc.

Inventor： Mark Adam Wiinikka ,  John McCullough ,  Russell Steven Cole ,  William Russell Cleary, JR. ,  Zachary Edwin Dailey

IPC: B64C27/48 ,  B29C70/54

Abstract: A rotorcraft main rotor system, including a yoke, a rotor blade, and a grip assembly attaching the rotor blade to the yoke. The grip assembly includes a grip body formed from a contiguous laminated composite and has a substantially constant thickness, where the grip body has an upper extension, a lower extension and a connecting portion connected between an inboard end of the upper extension and an inboard end of the lower extension. An inside surface of the upper extension faces, and is substantially parallel to, an inside surface of the lower extension, and the upper extension has first features and the lower extension has second features that are aligned with the first features, where the first features and second features each include at least one of an edge contour, attachment holes, or first protective elements.

公开(公告)号：US11155347B2

公开(公告)日：2021-10-26

申请号：US16372732

申请日：2019-04-02

Applicant: Textron Innovations Inc.

Inventor： Mark Adam Wiinikka ,  John McCullough ,  Russell Steven Cole ,  William Russell Cleary, Jr. ,  Zachary Edwin Dailey

IPC: B64C27/48 ,  B29C70/54 ,  B29L31/08

Abstract: An embodiment rotorcraft main rotor system, including a yoke, a rotor blade, and a grip assembly attaching the rotor blade to the yoke. The grip assembly includes a grip body formed from a contiguous laminated composite and has a substantially constant thickness, where the grip body has an upper extension, a lower extension and a connecting portion connected between an inboard end of the upper extension and an inboard end of the lower extension. An inside surface of the upper extension faces, and is substantially parallel to, an inside surface of the lower extension, and the upper extension has first features and the lower extension has second features that are aligned with the first features, where the first features and second features each include at least one of an edge contour, attachment holes, or first protective elements.

公开(公告)号：US11453486B2

公开(公告)日：2022-09-27

申请号：US17472001

申请日：2021-09-10

Applicant: Textron Innovations Inc.

Inventor： Mark Adam Wiinikka ,  John McCullough ,  Russell Steven Cole ,  William Russell Cleary, Jr. ,  Zachary Edwin Dailey

IPC: B64C27/48 ,  B29C70/54 ,  B29L31/08

Abstract: A rotorcraft main rotor system, including a yoke, a rotor blade, and a grip assembly attaching the rotor blade to the yoke. The grip assembly includes a grip body formed from a contiguous laminated composite and has a substantially constant thickness, where the grip body has an upper extension, a lower extension and a connecting portion connected between an inboard end of the upper extension and an inboard end of the lower extension. An inside surface of the upper extension faces, and is substantially parallel to, an inside surface of the lower extension, and the upper extension has first features and the lower extension has second features that are aligned with the first features, where the first features and second features each include at least one of an edge contour, attachment holes, or first protective elements.