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A valve for use in an air distribution system has an inlet member for the axial flow of air therethrough along a central axis. A downstream portion of the inlet tapers outwardly in the downstream direction. Support structure is presented from which an extension projects downstream along the axis of

A valve for use in an air distribution system has an inlet member for the axial flow of air therethrough along a central axis. A downstream portion of the inlet tapers outwardly in the downstream direction. Support structure is presented from which an extension projects downstream along the axis of the inlet. A damper for controlling air flow through the inlet defines an aperture penetrated by the support structure extension and a second aperture radially displaced from the first aperture. A motor is attached to the damper and is directly coupled to the support structure extension. The motor selectively positions the damper along the support structure extension between a downstream open position and an upstream closed position.

대표청구항 ▼

An air valve comprising: a generally cylindrical inlet section, said inlet section defining a seating surface; support means cantilevered from said inlet section, said support means including a threaded rod extending downstream form said inlet section; a damper assembly, including a damper plate and

An air valve comprising: a generally cylindrical inlet section, said inlet section defining a seating surface; support means cantilevered from said inlet section, said support means including a threaded rod extending downstream form said inlet section; a damper assembly, including a damper plate and a bidirectional electric motor, said motor including a rotatable portion, both said damper plate and said rotatable portion of said motor being penetrated by said threaded rod and said damper plate being mounted to said motor, the weights of said motor and said damper plate being generally symmetrically distributed with respect to the axis of said threaded rod and said damper plate defining a seating surface configured to cooperatively seat on said inlet section seating surface, said damper plate positionable between (i) a fully closed position in abutment with said seating surface and (ii) a fully open position downstream of said inlet section and out of the path of air flowing into and through said inlet section, said motor selectively bidirectionally positioning said damper assembly on said threaded rod; a first and a second guide rod, each penetrating said damper plate and projecting generally parallel to said threaded rod, said first and said second guide rods restraining the rotation of said damper plate so that torque created by the rotation of the rotor of said motor is transmitted through said rotatable portion of said motor to the threads of said threaded rod so as to cause the axial movement of said damper plate on said threaded rod; a stiffener member for maintaining said first and said second guide rods and said threaded rod generally parallel; and switch means operable to (i) de-energize said motor when said damper plate moves into said fully closed position by contact of said switch means with said inlet section and (ii) to de-energize said motor when said damper plate moves into said fully open position by contact of said switch means with said stiffener member.