FIELD: machine building.
SUBSTANCE: actuator apparatus comprises actuator (312) and yoke (340). Actuator includes upper casing (316) and lower casing (320) defining cavity (314) and actuating device (330) disposed at least partially within the cavity and dividing the cavity into upper chamber (332) and lower chamber (334). Yoke is connected to the actuator and has actuator spring (350) disposed within body (342) of the yoke and a yoke tube extending longitudinally through the body of the yoke.
EFFECT: yoke tube extends from an aperture in the lower casing of the actuator and provides an air passage that fluidly connects the lower chamber of the actuator and a controller.
21 cl, 5 dwg
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