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公开(公告)号：CA2457293C
公开(公告)日：2008-10-28
申请号：CA2457293
申请日：2002-08-26
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： LEDBETTER TIMOTHY K , STAMPS BRAD , SMITH MICHAEL REAUGH , BOTHWELL CHRISTOPHER M , POPELKA DAVID
Abstract: The present invention relates to an improved vibration cancellation device (10) designed to overcome many of the shortcomings inherent in prior devices . In many embodiments, the vibration cancellation device (10) is smaller in scale than prior designs, facilitating more versatility with respect to desi gn options. The device of the present invention achieves a smaller size partly due to the use of suspension springs (32) having an offset, rather than a parallel arrangement.
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公开(公告)号：AU2002332609B2
公开(公告)日：2007-03-29
申请号：AU2002332609
申请日：2002-08-26
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： STAMPS BRAD , BOTHWELL CHRISTOPHER M , POPELKA DAVID , LEDBETTER TIMOTHY K , SMITH MICHAEL REAUGH
Abstract: The present invention relates to an improved vibration cancellation device designed to overcome many of the shortcomings inherent in prior devices. In many embodiments, the vibration cancellation device is smaller in scale than prior designs, facilitating more versatility with respect to design options. The device of the present invention achieves a smaller size partly due to the use of suspension springs having an offset, rather than a parallel arrangement.
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公开(公告)号：BRPI0413189A
公开(公告)日：2006-10-03
申请号：BRPI0413189
申请日：2004-08-27
Applicant: BELL HELICOPTER TEXTRON INC
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Patent Agency Ranking
公开(公告)号：CA2533523A1
公开(公告)日：2005-06-02
申请号：CA2533523
申请日：2004-08-27
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： BASKIN BRYAN , SCHELLHASE ERNST C , NEWMAN THOMAS J , HOLLIMON CHARLES L , CAMPBELL THOMAS C , POPELKA DAVID A , ROBERTSON DANIEL B , BRASWELL JAMES L JR , STAMPS FRANK B , SMITH MICHAEL R , BOTHWELL CHRISTOPHER M , CORSO LAWRENCE M
IPC: B64C27/51 , B60G13/00 , B60G15/00 , B64C20060101 , F16D20060101 , F16F5/00 , F16F7/00 , F16F9/00 , F16F9/10 , F16F9/34 , F16F11/00 , F16F13/08 , F16F13/24 , F16F13/26
Abstract: A rotor hub assembly for a rotary-wing aircraft has a central member and a plurality of blade grips adapted for attaching rotor blades to the central member. The blade grips are pivotally attached to the central member and are capable of pivoting about a pivot axis generally normal to a plane of rotati on of the blades. The pivoting allows for in-plane motion of the blades relativ e to the central member. A damper is operably connected to each blade grip for damping the in-plane motion of the associated blade, each damper being selectively switchable between at least two spring rates.
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公开(公告)号：CA2533201A1
公开(公告)日：2005-03-10
申请号：CA2533201
申请日：2004-08-27
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： SMITH MICHAEL R , STAMPS FRANK B , ROBERTSON DANIEL B , SCHELLHASE ERNST C , CAMPBELL THOMAS C , BRASWELL JAMES L JR , CORSO LAWRENCE M , POPELKA DAVID A , NEWMAN THOMAS J , BOTHWELL CHRISTOPHER M , HOLLIMON CHARLES L , BASKIN BRYAN
IPC: B60G13/00 , B60G15/00 , B64C20060101 , B64C27/51 , F16D20060101 , F16F5/00 , F16F7/00 , F16F9/00 , F16F9/10 , F16F9/34 , F16F11/00 , F16F13/08 , F16F13/24 , F16F13/26
Abstract: A damper has a piston having an axis, an outer surface, and opposing ends. Elastomeric seals are in sealing contact with the outer surface of the pisto n, the seals being coaxial with the piston and limiting movement of the piston to a path along the axis of the piston. The seals also define fluid chambers adjacent the ends of the piston. A primary passage communicates the fluid chambers, and a selectively switchable valve for controls a flow of fluid fr om one of the chambers to another of the chambers through the primary passage. When the flow of fluid through the primary passage is permitted, movement of the piston is resisted by a first spring rate due to a shear force required to cause shear deflection of the seals. When the flow of fluid through the primary passage is restricted, movement of the piston is resisted by a secon d spring rate due to a fluid force required to cause bulging deflection of the seals.
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公开(公告)号：EP1658184A4
公开(公告)日：2012-02-22
申请号：EP04786599
申请日：2004-08-27
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： STAMPS FRANK B , SMITH MICHAEL R , BOTHWELL CHRISTOPHER M , CORSO LAWRENCE M , BRASWELL JAMES L JR , POPELKA DAVID A , SCHELLHASE ERNST C , HOLLIMON CHARLES L , NEWMAN THOMAS J , BASKIN BRYAN , CAMPBELL THOMAS C , ROBERTSON DANIEL B
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公开(公告)号：EP1658222A4
公开(公告)日：2012-03-14
申请号：EP04819036
申请日：2004-08-27
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： STAMPS FRANK B , SMITH MICHAEL R , BOTHWELL CHRISTOPHER M , CORSO LAWRENCE M , BRASWELL JAMES L JR , POPELKA DAVID A , SCHELLHASE ERNST C , HOLLIMON CHARLES L , NEWMAN THOMAS J , BASKIN BRYAN , CAMPBELL THOMAS C , ROBERTSON DANIEL B
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公开(公告)号：EP1419089A4
公开(公告)日：2006-03-22
申请号：EP02796400
申请日：2002-08-26
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： LEDBETTER TIMOTHY K , STAMPS BRAD , POPELKA DAVID , BOTHWELL CHRISTOPHER M , SMITH MICHAEL REAUGH
CPC classification number: B64C27/001 , B64C2027/005 , F16F7/116
Abstract: The present invention relates to an improved vibration cancellation device (10) designed to overcome many of the shortcomings inherent in prior devices. In many embodiments, the vibration cancellation device (10) is smaller in scale than prior designs, facilitating more versatility with respect to design options. The device of the present invention achieves a smaller size partly due to the use of suspension springs (32) having an offset, rather than a parallel arrangement.
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