公开(公告)号：US20170248251A1

公开(公告)日：2017-08-31

申请号：US15518349

申请日：2015-09-30

Applicant: Moog Inc.

Inventor： John KOPP ,  Christopher MAZURKIEWICZ

IPC: F16K31/42 ,  F16K31/08 ,  F16K31/04 ,  F15B13/043 ,  F15B13/044

CPC classification number: F16K31/426 ,  F15B13/043 ,  F15B13/0435 ,  F15B13/0444 ,  F16K31/047 ,  F16K31/082

Abstract: A servovalve (15) comprising a motor (16), a motor bias mechanism (20), a first stage valve member (22) adapted to be moved from a first position to a first off-null position, a second stage member (29) adapted to be moved from a first position to a second position with movement of the first valve member (22), a transfer link (34) acting between the first (22) and second (29) valve members, an eccentric drive member (35) acting between the motor (16) and the transfer link (34), the transfer link (34) and drive member (35) configured such that selective movement of the motor (16) causes the transfer link (34) to move the first valve member (22), movement of the first valve member (22) causes the second valve member (29) to move, and movement of the second valve member (29) causes the transfer link (34) to move the first valve member (22) from the first off-null position back to the null position.

公开(公告)号：US20220227487A1

公开(公告)日：2022-07-21

申请号：US17605938

申请日：2020-04-24

Applicant: Moog Inc.

Inventor： John KOPP

IPC: B64C27/68 ,  B64C27/605

Abstract: A rotor blade pitch control system (15) comprising a rotor blade (19a, 19b, 19c, 19d) rotatable about both a central axis (20) and a pitch axis (24a, 24b, 24c, 24d), a pitch drive rotor (32a, 32b, 32c, 32d) rotatable about the central axis independently of rotation of the rotor blade about the central axis, a pitch follower (40a, 40b, 40c, 40d) rotatable relative to the pitch drive rotor, the pitch drive rotor and the pitch follower having an eccentric axis (33a, 33b, 33c, 33d), a linkage (50a, 50b, 50c, 50d) between the pitch follower and the rotor blade configured such that the pitch follower rotates with rotation of the rotor blade about the central axis, the pitch drive rotor, the pitch follower and the linkage configured such that the pitch drive rotor may be driven to control an angular displacement of the pitch drive rotor relative to the pitch follower about the central axis and thereby control the pitch of the rotor blade about the pitch axis.