Vented EMA with Desiccant

摘要

A vented EMA may have a vent that allows gas to pass from into and out of the vented EMA, while preventing liquid from passing into and out of the vented EMA. The vented EMA may have a desiccant material inside the vented EMA that absorbs condensation from within the vented EMA. A vented EMA may also have an air flow path that conducts gas into and out of the vent during operation. As a result, the pressure inside the vented EMA may equalize with the pressure outside the vented EMA, but the deleterious ingress of liquids may be ameliorated.

主权项

1. A vented EMA comprising:
a motor; a gear train; a ball screw assembly comprising a free air volume bounded by the radially inner surface of the ball screw assembly,
wherein the motor drives the gear train,whereby the gear train translates the ball screw assembly; a housing comprising a structural support member of the vented EMA; a cover comprising a cylindrical member into which a portion of the housing is inserted; a liner comprising a cylinder section disposed annularly between the motor and the ball screw assembly; and a vent comprising a gas exchange apparatus comprising a gas permeable-liquid impermeable membrane whereby gas may be drawn into the vented EMA and whereby liquid may be prevented from being drawn into the vented EMA; and an air flow path, whereby the gas may be conducted between the free air volume and the vent.