公开(公告)号：US20210147072A1

公开(公告)日：2021-05-20

申请号：US17102552

申请日：2020-11-24

Applicant: Bell Textron Inc.

Inventor： Kyle Thomas Cravener

IPC: B64C27/32

Abstract: A passive hub flapping lock including: one or more lever arms, each lever arm rotatably coupled to a pivot and comprising a first lever arm end and a second lever arm end; one or more stop wedges; one or more frames coupled to the one or more stop wedges, each frame coupled to the first lever arm end of one of the one or more lever arms; one or more weight sets, each weight set comprising one or more weights coupled to the second lever arm end of one of the one or more lever arms; and one or more pivot torsion springs, each pivot torsion spring positioned at the pivot.