Automatic air register damper
OwnerWillie T. Grantinventor
Life of this patent
Estimating the term…
Abstract
An automatic damper device constructed to be integrated in multiple units into forced air heating and cooling systems for the purpose of controlling and regulating air flow to all rooms, individually and concurrently, within a dwelling; the automatic damper means incorporating a damper housing having a rotatable damper plate connected by flexible cable to dual solenoid motor means that are energized through dual switch means. Damper housing is installed in duct boot terminating in room register, and damper plate is rotatable between open and closed positions by said cable means attached to common solenoid plunger when automatic damper device responds to commands from associated room thermostat that controls damper motor means and combustion cycle of combustion means.
Claims10
Means for controlling the air flow through individual ducts which transport said air to separate rooms of a multiple room dwelling from a furnace, air-conditioning equipment or like devices and where each said duct has installed in its open ended termination an automatic damper means comprised of a damper housing, noise suppression and cushioning means attached to longitudinal edges of a damper plate for quietly arresting said damper plate pivotally mounted in the damper housing and movable between a closed position, thereby placing said cushioning means against front and rear panels of said damper housing, and an open position which allows substantially unrestricted flow through said duct, rotatable damper support means inserted in holes in end panels of said housing, DC solenoid motor means including cable means that implements rotational movement of a damper shaft attached to said damper plate for opening and closing said damper plate at the command of thermostatic control means, means for rectifying alternating current, said thermostatic control means regulating the combustion cycle of a furnace of like device and causing the motor means to be energized simultaneously with said furnace or like device whereupon said motor means influence rotation of damper plate from a closed position to an open position when the fuel control means are energized and from an open to a closed position when said furnace or like device is de-energized, or when said thermostat control means closes, a dual switch means having switch actuators operated by translational movement of a multi-diametered solenoid plunger common to a set of dual solenoids comprising the aforesaid DC solenoid motor means such that a switch actuator of a normally closed switch of said dual switch means is moved by said plunger to change said normally closed switch to an open switch condition whenever the damper plate is rotated from an open to a closed position or vice versa, the closed switch being a requisite condition for said switch means to establish a closed circuit thereby enabling the furnace or like device to initiate a heating or cooling cycle, and immediately after start of the heating or cooling process, the solenoid plunger moves said switch means actuator to create an open switch condition and de-energization of the previously energized solenoid, and energizes a time delay means that delays closing of the damper plate in the last room to be heated or cooled in said multiple room dwelling until said heating or cooling cycle is complete.
Means including a device for controlling air flow through a duct system of a furnace, air conditioner, or the like device where ducts of said system terminate as open ended tubular sections within room registers, said device having a frame assembly adapted for installation in an open ended duct termination, a damper plate with integral shaft centrally located in a damper housing, said damper plate with integral shaft pivotally mounted to extend the length of a frame assembly with extremities of said shaft supported on low friction pins provided in end panels of said housing, said damper plate and integral shaft movable alternately between open and closed positions where in its closed position said damper plate having sound suppression and cushioning material attached thereto engages a periphery of said damper housing and substantially restricts air flow past said damper plate whereas in the open position said damper plate permits substantially unrestricted flow through the register, motor means mounted on an extended panel of said frame assembly above the damper housing and operatively connected to said shaft through cable means to perform shaft and damper plate rotation between open and closed positions of said damper plate, said cable means including a pulley formed at mid-length of said shaft and a flexible cable encircling the circumference of said pulley and projecting upward through holes in a cable direction changer where said cable means traverses the top of said changer and terminates in a fastened condition atop a multi-diametered solenoid plunger with said plunger comprising the movable portion of a solenoid motor means which are energizable concurrently with control means of said furnace or like device when said furnace control means are operating in accordance with the commands of a room thermostat which regulates the furnace or like device, said solenoid motor means operatively connected to dual switch means through solenoid plunger movements that open and close said switches thereby energizing and de-energizing the motor means as required to rotate said shaft with said damper plate from the present to the preferred position.
Dependencies are inferred from the claim text.