Patent ID: 9631645
Date: 2017-04-25
CPC Classifications: B64C,F01C,F15B,Y10T

Claim:
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; and an 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.