Tail-rotor vibration dampener system

    公开(公告)号:US12129021B2

    公开(公告)日:2024-10-29

    申请号:US17658176

    申请日:2022-04-06

    发明人: Eric B. Gilbert

    IPC分类号: B64C27/00 F15B15/20 F15B21/00

    摘要: A tail-rotor vibration dampener system for an aircraft is provided. The system includes a fuselage and an open rotor assembly including a powerplant and a set of rotor blades. The system further includes at least one actuator unit connecting the open rotor assembly to the fuselage. The actuator unit includes a hydraulic actuator controlling a position of the open rotor assembly in relation to the fuselage and a dampening device operable to cancel a vibration emanating from the open rotor assembly. The system further includes a computerized vibration dampening controller, including programming to determine a frequency of the vibration emanating from the open rotor assembly and control the dampening device to cancel the vibration emanating from the open rotor assembly based upon the frequency.

    CONTROL CIRCUITRY AND PUMP SYSTEM
    3.
    发明公开

    公开(公告)号:US20240352952A1

    公开(公告)日:2024-10-24

    申请号:US18435315

    申请日:2024-02-07

    IPC分类号: F15B15/20

    CPC分类号: F15B15/20 F15B2211/426

    摘要: Control circuitry feeds a command current to a hydraulic pump whose displacement increases in accordance with increase in the command current. The displacement of the hydraulic pump is a delivery amount per rotation of the hydraulic pump. The control circuitry receives an input of actual measurement data, the data either indicating an actual relationship between the command current and the displacement of the hydraulic pump or indicating a predetermined rotation speed and an actual relationship between the command current and a delivery flow rate of the hydraulic pump at the predetermined rotation speed; and receives an input of a minimum-use displacement of the hydraulic pump or a minimum-use delivery flow rate of the hydraulic pump at a reference rotation speed. The control circuitry determines a minimum-use electric current by using the actual measurement data, the minimum-use electric current corresponding to the minimum-use displacement or the minimum-use delivery flow rate.

    METHOD AND SYSTEM FOR CONTROLLING FLOW COMMANDS

    公开(公告)号:US20240328440A1

    公开(公告)日:2024-10-03

    申请号:US18129420

    申请日:2023-03-31

    摘要: The present disclosure describes a hydraulic control system for power loss prevention that includes at least one controller having a memory and a processor. The at least one controller is configured to determine an observed flow rate of hydraulic fluid at a hydraulic actuator based on an actuation speed of the hydraulic actuator. Additionally, the at least one controller may compare the observed flow rate to a commanded flow rate of the hydraulic fluid to the hydraulic actuator by a hydraulic pump of the hydraulic control system. Further, the at least one controller may adjust the commanded flow rate to a target flow rate in response to determining that a difference between the commanded flow rate and the observed flow rate is greater than a threshold value.

    Valve manifold, valve and actuator assembly

    公开(公告)号:US12055161B2

    公开(公告)日:2024-08-06

    申请号:US17770497

    申请日:2019-10-23

    申请人: Asco, L.P.

    IPC分类号: F15B11/12 F15B15/14 F15B15/20

    摘要: A pneumatic actuator and control valve assembly has a housing with a control cavity for a control valve and an actuator cavity for an actuator piston and rod assembly. The control cavity and actuator cavity both have an elongated shape and are substantially parallel to each other. The control cavity has a supply port and first and second control valve outlet ports and at least one vent port with the control valve being movable through the control cavity for controlling communication between the supply port and the first and second outlet ports. The actuator cavity has first and second ports at the retracted and extended ends for shuttling the piston and within the actuator cavity between a retracted and extended end position. The housing has a first inlet and second inlet for passage of pressurized fluid to and from the housing.

    Method of using a hydraulic stake puller

    公开(公告)号:US12038026B2

    公开(公告)日:2024-07-16

    申请号:US17672322

    申请日:2022-02-15

    申请人: The Extractor LLC

    发明人: John Z. Blank

    摘要: A method for using a tool to extract tent stakes from the ground is disclosed. The tool has a portion that houses the motor and hydraulic fluid tank, and a hydraulic cylinder portion the user holds against a tent stake and operates to pull the tent stake. Hydraulic hoses connect the two portions. Separating the motor from the hydraulic cylinder allows the user to manipulate just the portion performing work on the tent stake without having to also lift or stabilize the larger and heavier motor portion. Rotating a handle causes the hydraulic cylinder to extend or retract. A hand guard may be present to prevent accidental crush injuries. The tool is designed to fully extract a stake in two strokes of the hydraulic cylinder.

    Irrigation management system
    10.
    发明授权

    公开(公告)号:US12035663B2

    公开(公告)日:2024-07-16

    申请号:US17720135

    申请日:2022-04-13

    申请人: M8 Systems, Inc.

    摘要: An irrigation management system is disclosed and positionable in-line with an irrigation pipe for monitoring and controlling a flow of fluid therethrough. In at least one embodiment, the system provides an inlet pipe and an opposing outlet pipe in serial fluid communication with the irrigation pipe. At least one fluid control valve is in serial fluid communication between the inlet pipe and outlet pipe for selectively controlling the flow of fluid therebetween. The fluid control valve provides a main valve and a hydraulic actuator for selectively moving the main valve between open and closed positions. The hydraulic actuator is also in serial fluid communication between a pair of actuator valves for moving the hydraulic actuator between open and closed positions. The system also provides at least one sample collection tank configured for temporarily storing a volume of fluid diverted from the irrigation pipe in order to be tested.