Abstract:
A rotary actuator (2900) includes a housing defining an arcuate chamber including a cavity, a fluid port in fluid communication with the cavity, and an open end. A rotor assembly includes an output shaft (2912) and a rotor arm (2914) extending outward. An arcuate- shaped piston is disposed in said housing for reciprocal movement in the arcuate chamber through the open end, wherein a seal, the cavity, and the piston define a pressure chamber, and a portion of the piston contacts the first rotor arm. A central actuation assembly (2960) includes a central mounting point (2964) formed in an external surface of the output shaft, said central mounting point proximal to the longitudinal midpoint of the shaft, and an actuation arm (2962) removably attached at a proximal end to the central mounting point, said actuation arm adapted at a distal end for attachment to an external mounting feature of a member to be actuated.
Abstract:
A rotary actuator includes a first housing defining a first arcuate chamber having a first cavity, a first fluid port in fluid communication with the first cavity, and an open end. A rotor assembly is rotatably journaled in the first housing and having a rotary output shaft and a first rotor arm extending radially outward from the rotary output shaft. An arcuate-shaped first piston is disposed in the first housing for reciprocal movement in the first arcuate chamber through the open end, wherein a first seal, the first cavity, and the first piston define a first pressure chamber, and a first portion of the first piston contacts the first rotor arm.
Abstract:
In one embodiment, a hydraulic blocking rotary actuator including a stator housing having a through bore to position a rotor assembly. A rotor assembly includes an output shaft and at least a first rotary piston assembly disposed radially about the output shaft. The rotary piston assembly includes an first vane element and an second vane element each with peripheral longitudinal faces substantially concentric to the other. A continuous seal groove is disposed in peripheral longitudinal faces and lateral end faces of the vane elements. A continuous seal is disposed in the continuous seal groove. The bore through the stator housing includes an interior cavity with surfaces adapted to receive the rotor assembly. With rotation fluid ports blocked the housing cavity is sealed with the continuous piston seal for hydraulic blocking, preventing actuator displacement by external forces. Other embodiments are disclosed.
Abstract:
A rotary actuator includes a housing (300) having an interior boundary that defines a central bore and has interior recesses, a chamber housing assembly (420) disposed in the central bore and having an arcuate chamber, the arcuate chamber comprising a cavity, an exterior boundary of the chamber housing assembly having exterior recesses, each of the exterior recesses aligned with a respective one of the interior recesses, pins (214) residing between the interior boundary and the exterior boundary, each of the pins (214) mated to one of the exterior recesses and a corresponding one of the interior recesses to maintain an orientation of the chamber housing assembly (420) with respect to the housing (300), a rotor assembly (200) rotatably journaled in the chamber housing assembly and comprising a rotary output shaft (200) and a rotor arm (212), and an arcuate-shaped piston (260, 414) disposed in the chamber housing assembly for reciprocal movement in the arcuate chamber.
Abstract:
A rotary actuator includes a housing, a first piston housing assembly comprising a first cavity and an open end, a rotor assembly rotatably journaled in said housing and comprising a rotary output shaft (3310) and a first rotor arm (3312) extending radially outward from the rotary output shaft to a first distal end comprising one or more first retainers (3380, 3382), and an arcuate-shaped first piston (3350) disposed in said housing for reciprocal movement in the first piston housing assembly through the open end along a radius of curvature. A first portion of the first piston connects to the first rotor arm at a first end portion comprising one or more second retainers. The first retainers and the second retainers are intermeshed along the radius of curvature such that movement of the rotor assembly urges movement of the first piston and movement of the first piston urges movement of the rotor assembly.
Abstract:
A rotary actuator (2900) includes a housing, a rotor assembly rotatably journaled in said housing and including a rotary output shaft (2912), a central actuation assembly (2960) including a central mounting point formed in an external surface of the rotary output shaft, said central mounting point proximal to the longitudinal midpoint of the rotary output shaft, a mounting assembly (2980) adapted for attachment to an external mounting connector of a mounting surface of an aircraft structural member, and an actuation arm removably attached at a proximal end to the central mounting point, said actuation arm adapted at a distal end for attachment to an external mounting feature of an aircraft assembly to be actuated.