公开(公告)号：CA2172281A1

公开(公告)日：1995-07-20

申请号：CA2172281

申请日：1994-12-16

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BALIOTTI JOHN A II ,  LAUCK KENNETH L

IPC: F15B15/14 ,  F16F9/32 ,  F16J1/22

Abstract: A self-aligning piston assembly (13) has a piston member (14) having a sidewall (19) for slidable displacement within a bore (12), the piston member having (14) an inner curved surface (22), the piston assembly (13) having an inner race member (23) having means to attach to a connecting member, the inner race member (23) having a curved surface (29) complementary to the inner curved surface (22) and an elastomer member (30) disposed therebetween substantially in the form of a sphere to provide a spherical type mounting of the piston to the connecting member. Utilizing a spherical type mounting, axial rigidity is maintained, yet any side loading which acts through the connecting member of manufacturing tolerance are absorbed through the spherical elastomer to prevent misalignment or cooking of the piston within the bore during stroking. Utilizing the invention, excessive wear and fluid leakage by the piston is avoided since misalignment is absorbed by the elastomer member.

公开(公告)号：DE69112886D1

公开(公告)日：1995-10-19

申请号：DE69112886

申请日：1991-04-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： HUNTER DAVID H ,  LAUCK KENNETH L ,  WHITE KEVIN A ,  MILNE ROBERT J ,  DOOLIN LEONARD L ,  POULIN STEPHEN V

IPC: B64C27/605

Abstract: The composite scissor assembly utilizes one or more flexible composite straps (21) disposed either in a radial or non-radial relationship between a hub attached to a rotor shaft (24) and an inner or outer ring (26) of a helicopter swashplate (20). The composite material has sufficient edge-wise stiffness to allow effective torque transmission between the rotor shaft (24) and the swashplate (20) yet has sufficient flexibility to allow for a vertical and angular displacement of the swashplate (20) relative to the rotor shaft (24). Utilizing a flexible composite scissor assembly eliminates the need for mechanical linkages having pins and bearings which are a frequent source for wear, increasing the reliability of the rotor assembly, while reducing weight.

公开(公告)号：DE69112886T2

公开(公告)日：1996-02-22

申请号：DE69112886

申请日：1991-04-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： HUNTER DAVID H ,  LAUCK KENNETH L ,  WHITE KEVIN A ,  MILNE ROBERT J ,  DOOLIN LEONARD L ,  POULIN STEPHEN V

IPC: B64C27/605

Abstract: The composite scissor assembly utilizes one or more flexible composite straps (21) disposed either in a radial or non-radial relationship between a hub attached to a rotor shaft (24) and an inner or outer ring (26) of a helicopter swashplate (20). The composite material has sufficient edge-wise stiffness to allow effective torque transmission between the rotor shaft (24) and the swashplate (20) yet has sufficient flexibility to allow for a vertical and angular displacement of the swashplate (20) relative to the rotor shaft (24). Utilizing a flexible composite scissor assembly eliminates the need for mechanical linkages having pins and bearings which are a frequent source for wear, increasing the reliability of the rotor assembly, while reducing weight.

公开(公告)号：CA2039758C

公开(公告)日：1995-03-28

申请号：CA2039758

申请日：1991-04-04

Applicant: UNITED TECHNOLOGIES CORP

Inventor： HUNTER DAVE H ,  LAUCK KENNETH L ,  WHITE KEVIN A ,  MILNE ROBERT J ,  DOOLIN LEONARD J ,  POULIN STEPHEN V

IPC: B64C27/605

Abstract: A flexible composite scissor assembly is disclosed which utilizes one or more composite straps disposed either in a radial or non-radial relationship between a hub attached to a rotor and an inner or outer ring of a helicopter swashplate. The composite material has sufficient edge-wise stiffness to allow effective torque transmission between the rotor shaft and the swashplate yet has sufficient flexibility to allow for a vertical and angular displacement of the swashplate relative to the rotor shaft. Utilizing a flexible composite scissor assembly eliminates the need for mechanical linkages having pins and bearings which are a frequent source for wear, increasing the reliability of the rotor assembly, while reducing weight.