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公开(公告)号：US12091161B2
公开(公告)日：2024-09-17
申请号：US17798130
申请日：2021-02-04
CPC分类号： B64C25/26 , B64C25/20 , F16F1/32 , B64C2025/125
摘要： An aircraft landing gear comprising: a first member, a second member pivotally coupled to the first member, and a spring coupled to the first and second members, the spring comprising a plurality of elastically deformable washers, the spring being arranged to generate a biasing force between the first and second members to bias the first member toward a predetermined orientation relative to the second member.
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公开(公告)号：US20240280092A1
公开(公告)日：2024-08-22
申请号：US18570582
申请日：2022-06-17
发明人： Tom LOVE , Andrew PLUMMER , Nathan SELL , Roy EVANS
IPC分类号： F04B17/00
CPC分类号： F04B17/003
摘要： A piezo-electric fluid pump is provided including a main housing; a fluid reservoir located within the main housing; a piston head moveably mounted within the main housing; a piezo-electric stack; a bias mechanism arranged to couple the piston head and piezo-electric stack and maintain the piezo-electric stack in compression; an outlet plate statically mounted within the main housing adjacent to the piston head, wherein the adjacent surfaces of the outlet plate and piston head define a pumping chamber; an inlet disc valve arranged to permit a one-way flow of fluid from the reservoir into the pumping chamber; and an outlet disc valve arranged to permit a one-way flow of fluid out of the pumping chamber. The combination of pre-loading of the piezo-electric stack in compression and use of inlet disc valve enables the piezo-electric pump to exhibit substantial improvement to the pressure and flow capability compared to other piezo-electric pumps.
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公开(公告)号：US11981424B2
公开(公告)日：2024-05-14
申请号：US17774925
申请日：2020-11-10
发明人： Antoine Guidoux , Jon Smith , Jean-Yves Ravel , Yann Simmonneaux
CPC分类号： B64C25/60 , B64D45/00 , B64F5/60 , B64D2045/008 , B64D2045/0085
摘要： A method of monitoring the condition of an aircraft landing gear shock absorber, the shock absorber including at least one spring chamber containing a gas, the method comprising taking a plurality of measurements of the gas pressure and temperature, each gas pressure and temperature measurement pair being taken of at the same instant relative to an operating cycle of the shock absorber; calculating, based on each pair of gas pressure and temperature measurements, a first value; storing the first value in a log; determining a value trend based on the log; and in response to determining that the value trend is outside a first range of values, generating a first notification signal.
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公开(公告)号：US11643193B2
公开(公告)日：2023-05-09
申请号：US17038956
申请日：2020-09-30
发明人： Robert Kyle Schmidt
CPC分类号： B64C25/36 , B60B35/02 , B60B2360/1442 , B60B2360/1454 , B60B2900/111 , B60B2900/3312 , B60Y2200/51
摘要： An aircraft landing gear bogie beam including first and second ends and a mounting bearing for connection to an aircraft landing gear main strut between the ends. Each end has a respective axle, and each axle defines a wheel mounting portion on each side of the bogie beam. The bogie beam is arranged to enable the first and second axles to each pivot relative to the bearing about a respective longitudinal axis of the bogie beam by an amount that is sufficient to place a wheel rim of a wheel assembly in contact with the ground in the event of a tyre of the wheel assembly deflating.
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公开(公告)号：US11565798B2
公开(公告)日：2023-01-31
申请号：US17322053
申请日：2021-05-17
发明人： Peter Sharpe
IPC分类号： B64C25/00 , B64C25/62 , B64C25/60 , F15B11/12 , F16F9/088 , F15B1/10 , B64C25/34 , F16F9/52 , F16F9/06
摘要： A center biased actuator having an outer cylinder, a slave cylinder linearly transposed within the outer cylinder, a rod assembly with a piston linearly transposed within the slave cylinder and a rod extending from the outer cylinder, one or more first dynamic seals arranged to act on a sidewall of the rod to inhibit hydraulic fluid leaking from the outer cylinder, one or more second dynamic seals arranged to act on a sidewall of the slave cylinder or an inner surface of the outer cylinder to inhibit hydraulic fluid leaking from the outer cylinder, and a gas chamber comprising a sealed expandable chamber containing gas. The expandable chamber is arranged to act on hydraulic fluid within the center biased actuator to bias the center biased actuator to assume an intermediate condition which lies between a compressed condition and an extended condition.
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公开(公告)号：US20220388638A1
公开(公告)日：2022-12-08
申请号：US17774925
申请日：2020-11-10
发明人： Antoine Guidoux , Jon Smith , Jean-Yves Ravel , Yann Simmonneaux
摘要： A method of monitoring the condition of an aircraft landing gear shock absorber, the shock absorber including at least one spring chamber containing a gas, the method comprising taking a plurality of measurements of the gas pressure and temperature, each gas pressure and temperature measurement pair being taken of at the same instant relative to an operating cycle of the shock absorber; calculating, based on each pair of gas pressure and temperature measurements, a first value; storing the first value in a log; determining a value trend based on the log; and in response to determining that the value trend is outside a first range of values, generating a first notification signal.
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公开(公告)号：US20220281589A1
公开(公告)日：2022-09-08
申请号：US17750812
申请日：2022-05-23
发明人： Ian Robert Bennett
摘要： An aircraft landing gear assembly having a reinstating geometry in which a lock link can be moved to assume a first locking condition to inhibit movement of a stay when a main strut is in a deployed condition and a second locking condition to inhibit movement of the main strut when in a stowed condition. An unlock actuator is coupled between a first element of the stay and the lock link such that the actuator can break the lock link from the first locking condition and force it to assume the second locking condition by operational force in a single direction.
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公开(公告)号：US20220033069A1
公开(公告)日：2022-02-03
申请号：US17503930
申请日：2021-10-18
发明人： Royston Alan Evans , Paul Shaw
摘要： An aircraft assembly having: a first part; a second part, the second part being movably mounted with respect to the first part; an electro-hydraulic actuator coupled between the second part and a first anchor point, the actuator comprising a cylinder defining a bore and a piston and rod assembly slidably mounted within the bore and an active chamber within which an increase in fluid pressure causes the actuator to change during a first phase between first and second extension states to move the second part relative to the first part. The electro-hydraulic actuator further includes a hydraulic fluid supply circuit comprising a piezo-electric pump operable to supply pressurised fluid to the active chamber to change the actuator between first and second extension states.
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公开(公告)号：US11180244B2
公开(公告)日：2021-11-23
申请号：US16223265
申请日：2018-12-18
发明人： Royston Alan Evans , Paul Shaw
IPC分类号： B64C25/22 , F15B11/10 , F15B15/06 , B64C25/24 , B64C25/26 , B64C25/12 , F15B1/02 , B64C25/18
摘要： An aircraft assembly having: a first part; a second part, the second part being movably mounted with respect to the first part; an electro-hydraulic actuator coupled between the second part and a first anchor point, the actuator comprising a cylinder defining a bore and a piston and rod assembly slidably mounted within the bore and an active chamber within which an increase in fluid pressure causes the actuator to change during a first phase between first and second extension states to move the second part relative to the first part. The electro-hydraulic actuator further includes a hydraulic fluid supply circuit comprising a piezo-electric pump operable to supply pressurised fluid to the active chamber to change the actuator between first and second extension states.
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公开(公告)号：US10890211B2
公开(公告)日：2021-01-12
申请号：US15497642
申请日：2017-04-26
发明人： Ian Robert Bennett
摘要： A dynamic bearing for an aircraft landing gear. The bearing comprises a lug, a shaft comprising a first material, and a bearing surface comprising a second material that is softer than the first material. The bearing surface defines a bore and is arranged to support the shaft when the shaft is movably housed within the bore in use. The bearing surface is defined by the lug or a coating applied to the lug.
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