Assignee: Research Products Corporation

Location: Madison, WI
No. of patents: 36

Number	Title	Issue Date
8157881	Collapsible extended surface filter and air cleaner system using collapsible extended surface filter An air cleaner comprises an enclosing structure having support members spaced a distance from top and bottom walls. A collapsible extended surface pleated media filter has end members and a pleated mechanical media filter. The end members have an outer surface and a...	04/17/2012
8146376	System and methods for actively controlling an HVAC system based on air cleaning requirements An active air cleaning controller is connected to a forced air heating, ventilation and air conditioning (HVAC) system. The active air cleaning controller uses call signals from a thermostat to the HVAC system and/or sensor signals to determine when, and for how lon...	04/03/2012
7574871	Systems and methods for whole-house dehumidification based on dew point measurements A dehumidifier system is connected to an interior space of a building through supply and return ducts, either directly and/or through an HVAC system. Controllable dampers can be used to select how the dehumidifier system is connected to the interior space and the HV...	08/18/2009
6572085	Humidifier with reversible housing and distribution tray overflow A humidifier features a two piece reversible housing which is snap fit together for holding a water panel assembly and a water feed tube to supply water to a water distribution structure disposed on top of the water panel assembly. The water panel assembl...	06/03/2003
6543282	Air flow detection apparatus An air flow detection apparatus useful in operating an accessory item in an HVAC system includes a sensor printed circuit board assembly having a first thermistor adapted to be exposed to an air flow and associated with a first pair of heating resistors. ...	04/08/2003
6394427	Drainless humidifier with water level sensing A housing is permanently connected to a water supply of a building and includes an evaporative water panel allowing water to flow downwardly and wick upwardly. A circulating device is provided for directing air from the building through the water panel. A...	05/28/2002
6367782	Water distributor A water distributor provides a uniform supply of water to an evaporative panel held in a frame of an evaporative apparatus. The water distributor includes a base having a plurality of flow channels, each of the flow channels having an inlet port for recei...	04/09/2002
6192931	Damper blade control A device for controlling the movement of a damper mounted in a housing includes a shaft rotatably secured to the damper for pivoting the damper between an open position and a closed position. A lever arm is mounted on the shaft for rotation therewith and ...	02/27/2001
6021955	Method and apparatus for controlling the speed of a damper blade A device for controlling the movement of a damper mounted in a housing between an open position and a closed position comprises a shaft rotatably secured to the damper for pivoting the damper between an open position and a closed position. A lever arm is ...	02/08/2000
6000684	Evaporative wicking pad A gas-pervious, liquid-gas contact pad comprises a reticulate body of water-permeable or wettable material having a large area of surfaces exposed for humidification purposes or the like. A plurality of slit and expanded sheets of wicking paper are connec...	12/14/1999
5716115	Door assembly for air filter housing A selectively removable door assembly is provided for completing an air filter housing having a series of interconnected walls for enclosing an air filter, certain of the walls being formed with retaining pockets. The door assembly comprises a door having...	02/10/1998
5655825	Latch arrangement for air filter housing A one-piece framework for holding the filter media of an air filter includes a pair of end walls integrally connected to a pair of frame members by a living hinge so that they may be pivotally moved between an assembled position and an unassembled positio...	08/12/1997
5609937	Frame for attachment to air filters A frame for a panel-like filter having two sides terminating in an edge comprises a semi-resilient deformable channel having an inwardly curved web with two flanges extending from a convex side thereof. The curved web also has a longitudinally extending s...	03/11/1997
5500271	Paint arrestor formed from slit sheet material A paint arrestor for absorbing paint overspray comprises a series of layers of sheet material, each of the layers being slit and expanded to define an array of air spaces distributed in columns. The air spaces alternate in size from column to column and r...	03/19/1996
5484125	Appliance mounting system A mounting system for suspending an appliance from a supporting structure includes an elongated U-shaped bracket and a plurality of fasteners for securing the bracket to a supporting structure. A mounting pin is disposed toward one end of the bracket and ...	01/16/1996
5322117	Heat exchanger media frame A corner frame construction for a heat exchanger includes an elongated L-shaped member disposed between the top and bottom plates of the heat exchanger. The L-shaped member has a first leg extending parallel to a first edge of the media layers and a secon...	06/21/1994
5302174	Multi-unit grease filter A multi-unit grease filter includes a first filter unit and a second filter unit, each having an upstream series of spaced apart elongated baffles and a downstream series of spaced apart elongated baffles offset from the upstream series of baffles so that...	04/12/1994
5273564	One piece filter media framework A one piece framework for holding the filter media of an air filter includes a pair of end walls integrally connected to a pair of frame members by a living hinge so that they may be pivotally moved between an assembled and unassembled position. A pair of...	12/28/1993
5273563	Filter media retaining assembly for an air filter A filter media retaining assembly for use in an air filter includes a filter media engaging flange disposed on the side wall of the filter framework which holds a pleat of the filter media adjacent the side wall and a hinged keeper disposed along the edge...	12/28/1993
5252260	Humidifier electrical control assembly An electrical control assembly for a humidistat controlled humidifier of the type having a base connected to the furnace ductwork and a cover removably connected to the base includes a control circuit board having a primary circuit for operation of the fa...	10/12/1993
5211891	Evaporative pad frame A frame for holding an evaporative pad in the base of a humidifier includes side walls, base and a top that define an evaporative pad holding chamber. Each of the side walls, base and top is provided with a flange that extends inwardly toward the opening ...	05/18/1993
5207020	Biodegradable slit and expanded erosion control cover An erosion control blanket is made of recycled, biodegradable slit and expanded sheets of paper. A plurality of layers are provided and are oriented such that the slope of the baffles in the grid pattern of the paper may be disposed in a positive or negat...	05/04/1993
5183488	Multi-stage filter frame assembly A multi-stage filter assembly having a number of filter media layers, at least one of which is removably mounted to a filter frame, utilizes a retaining clip to hold the filter media in place. The retaining clip is in the form of an elongated strip that e...	02/02/1993
4706808	Humidistat with improved mounting A humidistat (17) generally includes a humidity sensing cartridge (20) adapted to be enclosed within a housing (18) having a base (21) and a front cover (22). The cartridge includes a plurality of engageable portions (24, 28). The housing base includes a ...	11/17/1987
4701196	Air filter assembly An air filter assembly (1) includes an outer casing (6) having end, rear and downstream portions which are generally planular and thus easily settable on the floor during installation, with the downstream portion being mountable flush to a furnace (3) or ...	10/20/1987
4693048	Media support module for paint spray booths and the like In accordance with the various aspects of the invention, a spray booth media support module (1) includes a rectangular frame (5) which is of generally channel section. The frame forms opposing spaced end members (7) and connecting side members (8). One fr...	09/15/1987
4688596	Wall outlet box for central vacuum cleaning system A cutout (4) is made in a room wall (2) and flexible tubing (13) connected to a vacuum conduit (12) is pulled therethrough. A box (1) is attached to the tubing and includes a frame portion (15) for surrounding the cutout, and inwardly recessed portion (18...	08/25/1987
4559789	Variable cycle moisturizing control circuit for a gas-liquid contact pad The invention provides a variable cycle moisturizing control circuit for a gas-liquid contact pad (8, 18) in humidifiers (1), precoolers (17) and the like, supplied with fluid from a solenoid valve (34). Temperature sensitive electric circuit means (FIG. ...	12/24/1985
4349012	Solar heating control A solar heating control is adapted to be interconnected to a pre-existing auxiliary heating system connected to operate in response to a command signal issued by a pre-existing thermostat. The control operates in response to a first temperature sensed wit...	09/14/1982
4347197	Water distributor A water distributor is disposed above an air-liquid contact pad, and is supplied with water from a supply line. The water is received within an elongated enclosed chamber having at least one elongated corner in its lower portion. A floor portion of the ch...	08/31/1982
4338266	Device for conditioning air with improved gas-liquid contact pad A device for conditioning air has a pad formed of a plurality of layers of slit and expanded media, with the pad having a plurality of groups of layers therewithin. Each layer within a particular group of layers has its baffles oriented to face in the sam...	07/06/1982
4286751	Humidifier control The electrical energy flowing between a power source and a furnace blower motor is sensed for controlling the operation of a humidifier. A removable current sensor is connected without damaging or disfiguring the connecting lead being sensed. A solid stat...	09/01/1981
4286213	Energy sensor A removable energy sensor for sensing the flow of electrical energy through a current carrying conductor. A magnetic flux conducting circuit includes a U-shaped bracket providing an opening for removably retaining a conductor while a removable pin is reta...	08/25/1981
4281638	Damper for solar heating systems and the like A damper assembly for solar heating systems and the like includes a damper blade pivotably mounted to a peripheral main frame. The damper blade is surrounded by a peripheral flexible sealing element which extends inwardly from the surrounding frame and wh...	08/04/1981
4240072	Load indicator for an air cleaner A load indicator for an air cleaner associated with an air movement system which conducts air to a designated area in response to the supply of electrical energy from an energy source. An energy sensor includes a closed loop flux conducting circuit which ...	12/16/1980
4042358	Filter media An air filter is formed into an accordion-shaped body having reverse folds forming pockets. A plurality of string-like pleat spacing members are provided and with each member being threaded through a plurality of openings in the pocket walls. The openings...	08/16/1977

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Assignee: Research Products Corporation