A rotary actuator includes a housing having an interior boundary that defines a central bore and has interior recesses, a chamber housing assembly disposed in the central bore and having an arcuate chamber, the arcuate chamber comprising a cavity, an exterior boundary of the chamber housing assembly
A rotary actuator includes a housing having an interior boundary that defines a central bore and has interior recesses, a chamber housing assembly 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 residing between the interior boundary and the exterior boundary, each of the pins mated to one of the exterior recesses and a corresponding one of the interior recesses to maintain an orientation of the chamber housing assembly with respect to the housing, a rotor assembly rotatably journaled in the chamber housing assembly and comprising a rotary output shaft and a rotor arm, and an arcuate-shaped piston disposed in the chamber housing assembly for reciprocal movement in the arcuate chamber.
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1. A rotary actuator comprising: a housing comprising an interior boundary that defines a central bore and comprises interior recesses;a chamber housing assembly disposed in the central bore and comprising an arcuate chamber, the arcuate chamber comprising a cavity, a fluid port in fluid communicati
1. A rotary actuator comprising: a housing comprising an interior boundary that defines a central bore and comprises interior recesses;a chamber housing assembly disposed in the central bore and comprising an arcuate chamber, the arcuate chamber comprising a cavity, a fluid port in fluid communication with the cavity, and an open end, an exterior boundary of the chamber housing assembly comprising exterior recesses, each of the exterior recesses aligned with a respective one of the interior recesses;pins residing between the interior boundary of the housing and the exterior boundary of the chamber housing assembly, each of the pins mated to one of the exterior recesses and a corresponding one of the interior recesses to maintain an orientation of the chamber housing assembly with respect to the housing;a rotor assembly rotatably journaled in the chamber housing assembly and comprising a rotary output shaft and a rotor arm extending radially outward from the rotary output shaft; andan arcuate-shaped piston disposed in the chamber housing assembly 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 connects to the rotor arm. 2. The rotary actuator of claim 1, wherein each exterior recess and the corresponding interior recess define a pin receptacle, and each of the pins extends from a mounting surface into a respective pin receptacle. 3. The rotary actuator of claim 2, wherein the interior recesses are defined by interior depressions in the interior boundary at a mounting end of the housing and the exterior recesses are defined by exterior depressions in the exterior boundary at a mounting end of the chamber housing assembly. 4. The rotary actuator of claim 2, wherein the interior recesses are defined by interior depressions in the interior boundary at a distal end of the housing and the exterior recesses are defined by exterior depressions in the exterior boundary at a distal end of the chamber housing assembly. 5. The rotary actuator of claim 2, wherein the pin receptacles define inner radiuses that are sized to mate with a cylindrical outer boundary of the pins. 6. The rotary actuator of claim 1, wherein the housing comprises a mounting lug that projects radially outward at a mounting end of the housing, and the mounting lug provides a mounting point for removably affixing the rotary actuator to an external mounting surface. 7. The rotary actuator of claim 1, wherein a piston housing assembly is located within the cavity of the arcuate chamber. 8. A method of assembling a rotary actuator, the method comprising: receiving a first assembly comprising: a chamber housing assembly comprising an arcuate chamber comprising a cavity, a fluid port in fluid communication with the cavity, and an open end, an exterior boundary of the chamber housing assembly comprising exterior recesses,pins mated to the exterior recesses of the chamber housing assembly,a rotor assembly rotatably journaled in the chamber housing assembly and comprising a rotary output shaft and a rotor arm extending radially outward from the rotary output shaft; andan arcuate-shaped piston disposed in the chamber housing assembly 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 connects to the rotor arm; andpositioning the first assembly in a central bore of a housing, the housing comprising an interior boundary that defines the central bore and comprises interior recesses, wherein positioning the first assembly in the central bore of the housing aligns each of the interior recesses with a respective one of the exterior recesses and mates the interior recess to a corresponding pin to maintain an orientation of the chamber housing assembly with respect to the housing. 9. The method of claim 8, wherein each exterior recess and the corresponding interior recess define a pin receptacle, and each of the pins extends from a mounting surface into a respective pin receptacle. 10. The method of claim 9, wherein the interior recesses are defined by interior depressions in the interior boundary at a mounting end of the housing, the exterior recesses are defined by exterior depressions in the exterior boundary at a mounting end of the chamber housing assembly. 11. The method of claim 9, wherein the interior recesses are defined by interior depressions in the interior boundary at a distal end of the housing, the exterior recesses are defined by exterior depressions in the exterior boundary at a distal end of the chamber housing assembly. 12. The method of claim 9, wherein the pin receptacles define inner radiuses that are sized to mate with a cylindrical outer boundary of the pins. 13. The method of claim 8, wherein the housing comprises a mounting lug that projects radially outward at a mounting end of the housing, and the mounting lug provides a mounting point for removably affixing the rotary actuator to an external mounting surface. 14. The method of claim 8, wherein a piston housing assembly is located within the cavity of the arcuate chamber.
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