Propeller control unit
Number of patents in Portfolio can not be more than 2000
United States of America
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Apr 26, 2022
Grant Date -
Mar 28, 2019
app pub date -
Sep 25, 2017
filing date -
Sep 25, 2017
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present disclosure describes a propeller control unit for controlling the blade pitch of a propeller. The unit includes an electrohydraulic servo valve (“EHSV”) and is connected to a propeller actuator that adjusts the blade pitch of a propeller. The EHSV operates to allow pressurized fluid to flow from a pressurized fluid source to the actuator to adjust the blade pitch of the propeller in a flight pitch range and a ground pitch range, to allow pressurized fluid to flow from the source to the actuator to adjust the blade pitch of the propeller in a flight pitch range but not a ground pitch range, and to block the flow of pressurized fluid from the source to the actuator and drain pressurized fluid from the actuator to prevent adjustment of the blade pitch of the propeller in the flight pitch range or the ground pitch range.
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