Ventilation – Having inlet airway – With adjustable valve
Reexamination Certificate
2000-09-12
2002-01-15
Lu, Jiping (Department: 3749)
Ventilation
Having inlet airway
With adjustable valve
C454S256000, C454S299000, C454S318000, C454S319000
Reexamination Certificate
active
06338677
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to vents and, more specifically, to heating and cooling vents able to be opened and closed from a central location thereby controlling the flow of heated and cooling air to a specific area of a structure and reducing the heating and cooling costs of the structure.
2. Description of the Prior Art
Numerous types of air vent control system devices designed for the control of air flow have been provided in the prior art. For example, U.S. Pat. Nos. 4,150,788; 4,945,822; 4,997,030; 5,004,149; 5,014,610; 5,312,298; 5,441,451; 5,449,143; 5,704,832; 5,984,775 and 6,050,892 all are illustrative of such prior art. While these units may be suitable for the particular purpose to which they address, they would not be as suitable for the purposes of the present invention as heretofore described.
U.S. Pat. No. 4,150,788
Inventor: Yoshihisa Matsumoto et al.
Issued: Apr. 24, 1979
A remote-controlled forced-circulation central air-conditioning system comprising a central heat-exchanger unit and a plurality of terminal air-conditioning units which are connected to the central heat-exchanger unit through terminal valves, respectively, which are arranged in parallel with one another, wherein a water circulation pump and the central heat-exchanger unit are started and shut off upon detection of variation in the pressure and/or the temperature of the liquid such as hot water in the liquid supply circuit leading to the terminal air-conditioning units when the terminal valve or valves are opened up and thereafter closed. The system may include a terminal heat-exchanger unit such as a bath.
U.S. Pat. No. 4,945,822
Inventor: Lester R. Hicks et al.
Issued: Aug. 7, 1990
An air control apparatus for a forced air central air conditioning system of the type having an air conditioning unit for conditioning air and a duct for conducting the conditioned air from the unit to a living area of a building. The air control apparatus includes a frame having a border and an air passage defined by the border, the border having a first surface for attachment to a first portion of the duct and an opposite second surface for attachment to a second portion of the duct, and an air seal slidably disposed in the frame between the first and second surfaces of the border, the air seal being movable in and out of the air passage to open and close the air passage and thereby regulate the flow of air therethrough. A handle is removably attached to the air seal and extends away from the frame for allowing the air passage to be manually opened and closed from within the living area of the building. A forced air central air conditioning system having an air control apparatus for regulating the flow of air through the system is also provided.
U.S. Pat. No. 4,997,030
Inventor: Yukifumi Goto et al.
Issued: Mar. 5, 1991
A central air conditioning system includes an air conditioning apparatus having a system controller and a variable air volume controller having a damper which controls the amount of conditioned air fed from the air conditioning apparatus into each room to be air-conditioned. Each room is provided with a room remote controller for controlling the operation of the air volume controller. The room remote controller outputs a start/stop command signal to control the operation of both the air conditioning apparatus and the air volume controller. The temperature of conditioned air fed from the air conditioning apparatus is maintained at a prescribed value determined on the basis of the desired room temperature in each room.
U.S. Pat. No. 5,004,149
Inventor: Hidetoshi Narikiyo et al.
Issued: Apr. 2, 1991
A central air conditioning system includes a compensating control function in which the prescribed target temperature Tfs of the conditioned air supplied from the air conditioning apparatus to a main duct is changed from the original value to a prescribed value of a modified target temperature Tfm to establish the target temperature Tfs when the actual room temperature Ta in each room does not achieve a corresponding desired room temperature Ts even though the damper of the corresponding air volume control unit is positioned at either the fully opened position or the closed position. The temperature of the conditioned air from the air conditioning apparatus is controlled in accordance with the target temperature Tfs, and the target temperature Tfs of the conditioned air is further changed to successive values of the modified target temperature Tfm until the actual room temperature Ta in each room achieves the corresponding desired room temperature Ts.
U.S. Pat. No. 5,014,610
Inventor: Isreal Twito
Issued: May 14, 1991
A modular outlet end units, or louvre units, for air ducts leading from a central air-conditioning plant, the louvre unit includes a plurality of sections which are include means for interconnection of a plurality of louvre units in order to enable the construction of any required size or dimension of outlet.
U.S. Pat. No. 5,312,298
Inventor: Leroy Myers
Issued: May 17, 1994
Floor vents for alternately supplying air to a conditioned space. Such vents, used in combination with a heating or cooling system, facilitate the delivery of air in a desired direction. The plastic vent may be constructed of pigmented material in a desired color. Louvers with integrally formed gears are pivotally mounted between ends of the vent, and are repostioned by a thumbwheel located below the upper surface of the grille portion of the vent, to thereby avoid damage to the gear by foot traffic above the vent. The louvers are provided with integrally formed bushings and rotatable end elements to enhance rotation and reliability.
U.S. Pat. No. 5,441,451
Inventor: Choon N. Jeung
Issued: Aug. 15, 1995
An air vent includes a louver blade mounted in a housing for rotation about an axis. A motor output shaft is connected to a driving link to rotate the driving link about the axis. A driven link in the form of a crank arm extends from the driving link to the louver blade. A spring in the form of a torsional coil spring interconnects the driving link and the driven link for transmitting rotation therebetween to adjust the louver blade. When an undesired external force is applied to the louver blade, the spring can yield elastically to prevent relative movement between the driving link and driven link in order to protect the motor.
U.S. Pat. No. 5,449,143
Inventor: Nam S. Hur
Issued: Sep. 12, 1995
An air vent includes a louver blade rotatable to adjusted positions by a motor. A control mechanism which connects the motor with the louver blade includes a control member connected to the motor, and a rotation transmitting member connecting the control member to the louver blade. The control member and rotation transmitting member are rotatable about a common axis. The rotation transmitting member and control member are capable of limited relative rotation in the event that an unwanted external force is applied to the louver blade, in order to isolate the motor from that external force. Spring-biased return blocks engage an elliptically shaped portion of the rotation transmitting member to return the louver blade to a prescribed angular relationship to the control member when the external force is relieved.
U.S. Pat. No. 5,704,832
Inventor: Gustavo Borrell
Issued: Jan. 6, 1998
An air conditioning vent cover assembly to be disposed over an outlet vent of an air conditioner duct, and including a frame structured for secure, fitted engagement over the outlet vent. The frame itself includes an exterior face having a plurality of openings formed therein so as to permit air flow therethrough from the vent and provide an attractive exterior appearance. Furthermore, rotatably connected to the frame is at least one propeller assembly having a central hub and at least one blade extending from a perimeter of the central hub. The propeller assembly is structured to freely rotate as a result of air flow from the air conditioning duct flowing thereover, such that the air flo
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