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公开(公告)号：CA2828087C
公开(公告)日：2016-08-09
申请号：CA2828087
申请日：2011-02-24
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： BOSWORTH JEFFREY , STAMPS FRANK B
Abstract: A temperature adaptive fluid damping system is provided. One embodiment of the temperature adaptive fluid damping system comprises two fluid chambers, a piston in fluid communication with the fluid chambers, and a fluid path between the fluid chambers. An elastomeric retaining element adjacent to the fluid path is constrained to deform substantially perpendicular to the fluid path, so that the retaining element is operable to vary the cross-sectional area of the fluid path inversely to a change in temperature.
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公开(公告)号：CA2800439C
公开(公告)日：2016-03-22
申请号：CA2800439
申请日：2012-12-20
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： BISER JOSEPH , DAY CLIFTON B , STAMPS FRANK B , SPIVEY DANIEL
IPC: B64C27/605 , B64C11/32 , F16C7/06
Abstract: According to one embodiment, a pitch link includes a first link, a second link coupled to a first end of the first link, a third link coupled to a second end of the first link opposite the first end, and a first bearing housing having a first bearing and a second bearing housing having a second bearing. The first bearing housing is removably coupled to the second link. The second link separates the first bearing housing from the first link. The second bearing housing is removably coupled to the third link. The third link separates the second bearing housing from the first link.
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公开(公告)号：CA2832784C
公开(公告)日：2016-02-09
申请号：CA2832784
申请日：2013-11-05
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： SUTTON DREW A , FOSKEY CHRISTOPHER , SMITH DUDLEY , STAMPS FRANK B
Abstract: According to one embodiment, a constant velocity (CV) joint includes a first yoke, a second yoke, and a control mechanism. The first yoke is configured to be rotatably coupled to an input device about a first axis and configured to receive the input device through a first opening. The second yoke is rotatably coupled to the first yoke about a second axis and rotatably coupled to an output device about a third axis. The control mechanism is adapted to constrain the first yoke and the second yoke so as to achieve a substantially CV characteristic between the input device and the output device.
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公开(公告)号：CA2714527C
公开(公告)日：2015-11-24
申请号：CA2714527
申请日：2008-02-12
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： STAMPS FRANK B , BRASWELL JAMES L , HAYNIE DAVID A , YUCE MITHAT
IPC: B64C27/51
Abstract: A lead-lag damper for a rotor assembly has a body mounted to either an inboard portion of a blade assembly or a fixed portion of the rotor assembly. A piston carried within the body is configured to allow for relative motion between the body and the piston. The piston defines opposing chambers within the body, the chambers being in fluid communication through a fluid passage. A link connects the piston to the other of the inboard portion of the blade assembly and the fixed portion of the rotor assembly, and the link engages a central portion of the piston. The piston acts on fluid in the chambers during relative motion between the piston and the body and causes fluid flow between the chambers through the fluid passage. Flow through the passage acts to damp lead-lag motion of the blade assembly relative to the fixed portion of the rotor assembly.
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公开(公告)号：CA2801327C
公开(公告)日：2015-09-08
申请号：CA2801327
申请日：2013-01-09
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： JARRETT CHAD L , STAMPS FRANK B , WIINIKKA MARK , HEMMEN SCOTT
IPC: B64C27/35
Abstract: According to one embodiment, a rotor system comprises a yoke, a grip, an elastomeric bearing, and a bearing restraint. The grip is positioned around a portion of the yoke and has both a closed end and an open end. The elastomeric bearing is coupled to the closed end of the grip and located between the closed end and the yoke. The bearing restraint is coupled to the grip between the yoke and the open end at a distance from the closed end such that the yoke contacts the bearing restraint when the rotor system is subject to a first centrifugal force but does not contact the bearing restraint when the rotor system is subject to a second centrifugal force greater than the first centrifugal force
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Patent Agency Ranking
公开(公告)号：CA2805894C
公开(公告)日：2015-04-07
申请号：CA2805894
申请日：2013-02-12
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： BOSWORTH JEFFREY , YUCE MITHAT , STAMPS FRANK B , SMITH MICHAEL R
Abstract: A dual frequency damper includes a liquid inertia vibration eliminator (LIVE) portion and a fluid damper portion. LIVE portion and fluid damper portion operate in series and function so that dual frequency damper is optimized in both stiffness and damping at multiple frequencies. LIVE portion acts as a frequency dependent switch to selectively cause low frequency oscillatory forces to be treated primarily by the high spring rate and high damping rate characteristics of the fluid damper portion, and also to select high frequency oscillatory forces to be primarily treated by the low spring rate and low damping rate characteristics of the LIVE unit portion.
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公开(公告)号：CA2776045C
公开(公告)日：2015-03-24
申请号：CA2776045
申请日：2009-10-13
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： STAMPS FRANK B , TISDALE PAT , MARSHALL BRYAN , CAMPBELL TOM
Abstract: A method of making a composite rotor yoke includes preparing a molded rotor yoke in a closed cavity tool and possibly machining at least one portion of the molded rotor yoke to form the rotor yoke. In the preferred embodiment, preparing the molded rotor yoke is accomplished by applying layers of uncured low-flow composite material and a layer of uncured high-flow adhesive; substantially enclosing the uncured molded rotor yoke in the closed cavity tool; applying pressure so as to compress the uncured molded rotor yoke; and curing the uncured molded rotor yoke. During the curing process, the high-flow adhesive bleeds out of the molded rotor yoke, thereby preventing marcels from forming through movement of the low-flow composite material.
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公开(公告)号：CA2831584C
公开(公告)日：2014-12-09
申请号：CA2831584
申请日：2011-04-26
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： YUCE MITHAT , POPELKA DAVID A , STAMPS FRANK B , WIINIKKA MARK A
Abstract: A dual series damper includes a fluid damper portion and a elastomeric damper portion. The fluid damper portion includes a first housing, a first connection member, and a piston coupled to the first connection member. The piston divides an interior of the first housing into a first fluid chamber and a second fluid chamber. The piston has a fluid passage in the piston, the fluid passage being configured to provide fluid communication between the first fluid chamber and the second fluid chamber. The elastomeric damper portion includes a second housing, a second connection member coupled to the second housing, and an elastomer between the first housing and the second housing. When a lead/lag force is introduced to the dual series damper, the fluid damper portion behaves rigidly so that the elastomeric damper portion dampens the lead/lag oscillation.
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公开(公告)号：CA2801327A1
公开(公告)日：2013-07-10
申请号：CA2801327
申请日：2013-01-09
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： JARRETT CHAD L , STAMPS FRANK B , WIINIKKA MARK , HEMMEN SCOTT
IPC: B64C27/35
Abstract: According to one embodiment, a rotor system comprises a yoke, a grip, an elastomeric bearing, and a bearing restraint. The grip is positioned around a portion of the yoke and has both a closed end and an open end. The elastomeric bearing is coupled to the closed end of the grip and located between the closed end and the yoke. The bearing restraint is coupled to the grip between the yoke and the open end at a distance from the closed end such that the yoke contacts the bearing restraint when the rotor system is subject to a first centrifugal force but does not contact the bearing restraint when the rotor system is subject to a second centrifugal force greater than the first centrifugal force
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公开(公告)号：CA2773175A1
公开(公告)日：2012-10-04
申请号：CA2773175
申请日：2012-03-29
Applicant: BELL HELICOPTER TEXTRON INC
Inventor： SOTTIAUX DANIEL P , STAMPS FRANK B
Abstract: A tube form assembly includes an inner member and an outer member. Each of the inner and outer members has an offset which creates a cavity therebetween. During assembly of the tube form assembly, an adhesive is located in the cavity and squeezed out and through the adjacent bond lines between the inner member and outer member. The pressurization and flow of adhesive outward from the cavity facilitates removal of air bubbles, as well as prevents the introduction of air bubbles into the bond line.
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