| 摘要 |
This invention consists of a linearly operated gas vent assembly in which the dynamic range of gas flow is increased by use of a low drag actuator profile. The structure consists generally of a swivel vent module and a housing module, in which the swivel vent assembly regulates the volume flow of air and the housing module imparts spacial control over the direction of air flow. The swivel vent module comprises four sub-modules: a ball cylinder, an actuator cylinder, a valve disk, and an arrangement of hinging elements to rotate the disk. The ball cylinder is a cylindrical shell and constitutes an outer case of the swivel vent module. The outside surface of the ball cylinder is shaped as a segment of a sphere, with the inside surface being shaped as a straight cylinder and containing a circular seal grove. The actuator cylinder is a cylindrical shell with an outer diameter adapted to slidably conform to the inside of the ball cylinder. A ring seal applies pressure to the actuator cylinder so as to help maintain positioning of the actuator cylinder at locations between fully open and fully closed. A first end of the actuator cylinder has a flange extending radially outward from the longitudinal cylinder axis so as to form an actuator grip. The actuator grip also operates to stop further sliding motion of the actuator cylinder into the ball cylinder. A second end of the actuator cylinder forms an actuator pin support by means of a flange extending radially inward toward the longitudinal cylinder axis. A circular valve disk is adapted to fit inside the actuator cylinder and is hinged so as to open or close the air passage. The passageway is extended when the valve is lengthened.
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