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| Number | Title | Issue Date |
| 4776484 | Unitized cabinet design A frameless air handling enclosure is made possible by the use of double-flanged edges on the enclosure's side and bottom panels. The edge configuration provides reinforcement and rigidity to an otherwise flexible panel and also provides a mating surface ... | 10/11/1988 |
| 4767939 | Wind driven electric current producer A wind-driven electric current-producer has a magnetic field producing alternator rotor directly driven by an air turbine blade. The alternator and blade together are mounted on a vertically tiltable control frame which is pivotably mounted on a main fram... | 08/30/1988 |
| 4720981 | Cooling of air conditioning control electronics A residential heat pump installation includes a variable speed reciprocating compressor. The compressor speed control components, which include an inverter, are cooled by diverting the refrigerant liquid line into the closed controls compartment of the ou... | 01/26/1988 |
| 4718829 | Noise reduction using suction gas to foam oil A first portion of a pitot tube-like device faces into the incoming stream of suction gas which enters the hermetic shell of a low-side reciprocating compressor. A second portion of the device extends downwardly toward the oil sump within the shell. The d... | 01/12/1988 |
| 4715733 | Antifriction thrust bearing for orbital motion A thrust bearing for use between two parallel plates in relative orbital motion. The bearing includes a plurality of rollers disposed between the plates. Each roller comprises two opposing cones joined at their base with one cone in rolling line contact w... | 12/29/1987 |
| 4715190 | Control and method for modulating the capacity of a temperature conditioning system A control and method for varying the capacity of a centrifugal chiller system used to cool a liquid to a setpoint temperature. The control permits the user to select the setpoint, the control gain, and two variables that determine a first deadband and a s... | 12/29/1987 |
| 4701114 | Compressor suction gas heat shield A combination heat shield/gasket is disposed between abutting components in a reciprocating compressor. The heat shield/gasket includes strategically located protuberances, at locations where the components do not directly abut, the tips of which contact ... | 10/20/1987 |
| 4693501 | Refrigeration tubing joint A heat exchanger tube assembly having one end of a copper tube soldered to the end of an aluminum tube, and a method of minimizing galvanic corrosion at the soldered joint. The aluminum tube, having a roughened inner surface for enhanced heat transfer, fi... | 09/15/1987 |
| 4683942 | Assembly for retrofitting two air handling units to an installation originally meant for a single unit A retrofit assembly for adapting two replacement rooftop air handling units to a multizone installation that originally had only one air handling unit. The two replacement units include one heating unit and one cooling unit, while the original unit typica... | 08/04/1987 |
| 4679411 | Stepped capacity constant volume building air conditioning system An air conditioning system is disclosed in which the air conditioning capacity is stepped to a lower level upon reduced sensible air conditioning demand. The stepped reduction involves both a stepped reduction of blower capacity and a stepped change of th... | 07/14/1987 |
| 4646537 | Hot water heating and defrost in a heat pump circuit An air-to-air heat pump system includes a refrigerant-liquid heat exchanger for heating a liquid. The system is capable of (1) space cooling, or (2) space heating, or (3) liquid heating without affecting the condition of an indoor space, or (4) simultaneo... | 03/03/1987 |
| 4643654 | Screw rotor profile and method for generating A screw rotor profile for both male and female rotors is generated from a single rack in which each individual rack segment includes four discrete circular arc segments and two discrete straight line segments. The leading and trailing flanks of the lobes ... | 02/17/1987 |
| 4622048 | Liquid-gas separator Apparatus for separating a liquid from a gas includes a cylindrical separator element disposed in a sealed housing. The separator element includes a helical ramp wrapped around a cylindrical column both of which are disposed in a hollow cylindrical shell.... | 11/11/1986 |
| 4606706 | Internal compliant seal for compressor In a hermetic compressor, a seal extending between a suction port and a second port in fluid communication with an internal chamber disposed adjacent an electric motor. The seal includes a cylindrical tubular member, one end of which slidingly fits within... | 08/19/1986 |
| 4573326 | Adaptive defrost control for heat pump system A microcomputer based defrost control for a heat pump system that "learns" from previous defrost cycles to achieve optimum defrost control at each of a plurality of outdoor temperature ranges, even if the heat pump system operating parameters change due t... | 03/04/1986 |
| 4573324 | Compressor motor housing as an economizer and motor cooler in a refrigeration system Liquid refrigerant produced in the condenser of a refrigeration system is directed into an expansion device. The expansion device throttles the high pressure liquid refrigerant into the compressor drive motor housing of the compressor assembly within the ... | 03/04/1986 |
| 4552518 | Scroll machine with discharge passage through orbiting scroll plate and associated lubrication system A scroll compressor enclosed in a hermetic shell, wherein part of the volume enclosed by the shell is at suction pressure and part is at discharge pressure. The compressor includes both a stationary and a driven scroll plate, with intermeshed involute wra... | 11/12/1985 |
| 4550775 | Compressor intercooler A heat exchanger of the shell and tube type particularly suitable as an intercooler between compression stages of a compressor is disclosed. The heat exchanger includes a generally cylindrical shell having first and second coil banks disposed therein. The... | 11/05/1985 |
| 4543796 | Control and method for tempering supply air A microprocessor based control for tempering supply air in a multi-stage temperature conditioning system. The temperature conditioning stages are normally controlled in response to a comfort temperature sensor to maintain the zone at a setpoint. However, ... | 10/01/1985 |
| 4544030 | Shell nozzle A nozzle for a shell of a heat exchanger particularly useful as the outlet nozzle thereof in which an outlet pipe extends into the shell, and a bellmouth orifice is provided at the end of the pipe. A mounting plate is attached to the orifice and extends b... | 10/01/1985 |
| 4535838 | Heat exchange coil and method of making A multi-circuit arrangement for a wound coil heat exchanger and a method for making it are disclosed. The coil circuits are wound from a continuous length of spine fin tubing; locations are determined for breaking into the wound, continuous length of tubi... | 08/20/1985 |
| 4528822 | Heat pump refrigeration circuit with liquid heating capability A heat pump refrigeration circuit utilizes an indoor heat exchange unit, an outdoor heat exchange unit and a refrigerant-liquid heat exchange unit all connected serially to accomplish space heating, space cooling, liquid heating or simultaneous space cool... | 07/16/1985 |
| 4522575 | Scroll machine using discharge pressure for axial sealing A scroll compressor in which a fluid compressed by the machine is applied to one side of an orbiting scroll plate to provide an axial sealing force directed toward an opposing stationary scroll plate. Intermeshed involute wrap elements on facing surfaces ... | 06/11/1985 |
| 4514988 | Refrigerated display case having ambient air defrost A refrigerated display case having an ambient air automatic defrost system and a method of operating such a case. The display case has an access opening in one wall for enabling products within the display section to be removed. The access opening can be ... | 05/07/1985 |
| 4501125 | Temperature conditioning system staging control and method A control for a multi-stage heating and cooling system used to temperature conditioning a comfort zone. The control includes a microprocessor responsive to a temperature sensor installed in the comfort zone. Heating and cooling setpoints and a lookup tabl... | 02/26/1985 |
| 4498220 | Method for pre-expanding heat exchanger tube This invention is a method for pre-expanding a heat exchanger tube prior to its insertion into a tube sheet. A tubular mandrel having an elastic bladder sheath sealed at each end is inserted into the tube and positioned at the point where the tube is to b... | 02/12/1985 |
| 4488855 | Main bearing lubrication system for scroll machine A system for lubricating the main drive shaft bearings in a scroll compressor enclosed within a hermetic shell. The drive shaft and its main bearings are supported in a frame that defines first and second chambers adjacent each end of a main bearing. Each... | 12/18/1984 |
| 4487028 | Control for a variable capacity temperature conditioning system A control for a variable capacity reciprocating compressor water chiller system. A microprocessor connected to monitor return and supply fluid temperature sensors in the system is programmed to vary the compressor capacity in response to the deviation of ... | 12/11/1984 |
| 4484452 | Heat pump refrigerant charge control system A microcomputer controlled charge control system for modulating charge in a heat pump refrigerant circuit. A charge receiver has its interior in thermal communication with the compressor suction line and has a single charge flow line connected via a charg... | 11/27/1984 |
| 4483156 | Bi-directional variable subcooler for heat pumps A bi-directional flow auxiliary heat exchanger is disposed in proximity to the outdoor heat exchanger of a heat pump. The auxiliary fin and tube coil is active in both the heating and cooling modes to subcool refrigerant fluid flowing from the condenser. ... | 11/20/1984 |
| 4478277 | Heat exchanger having uniform surface temperature and improved structural strength A plate-type heat exchanger having uniform surface temperature and improved structural strength is disclosed, which may be used as a structural support member for an object to be temperature controlled, and which provides a surface having an exceptionally... | 10/23/1984 |
| 4273262 | Rotary dispenser apparatus A rotary driven drum-shaped dispenser for fluid materials is disclosed. The drum is comprised of a plurality of nested rings each of which has a plurality of arcuate channels through which the fluid material is passed during rotation of the drum. An adjus... | 06/16/1981 |
| 4155701 | Variable capacity burner assembly A variable capacity burner assembly for the combustion of a fuel-air mixture is disclosed which includes a combustion air supply housing having spaced front and rear walls and including an opening in said front wall for the discharge of combustion air int... | 05/22/1979 |
| 4149389 | Heat pump system selectively operable in a cascade mode and method of operation A system is disclosed for the transfer of heat from an ambient heat sink of variable temperature to a conditioned space, said system being operable in a first mode when the temperature of the heat sink is at a relatively high level, and in a second mode w... | 04/17/1979 |
| 4143707 | Air conditioning apparatus including a heat pump Apparatus are disclosed for conditioning the air within an indoor space and include first heat transfer means for selectively heating air passing to the space and a heat pump selectively operable in a heating mode, also for heating air passing to the indo... | 03/13/1979 |
| 4135396 | Temperature compensating fluid velocity sensing apparatus Apparatus are disclosed for sensing the velocity of a fluid stream, as may be flowing in a duct, pipe, or the like, which fluid stream exhibits variations in its temperature under different operating conditions. The apparatus includes a first probe which ... | 01/23/1979 |
| 4134274 | System for producing refrigeration and a heated liquid and control therefor The present invention relates to a refrigeration system of the type having an air cooled condenser which includes the further capability of producing a heated liquid in a liquid cooled or, "heat recovery" condenser. The system includes compressor means fo... | 01/16/1979 |
| 4106306 | Refrigerant charge adjuster apparatus Herein is disclosed an electronically controlled apparatus for accurately charging and/or venting refrigerant for an air conditioning system having an air cooled condenser and capillary tube control. The system includes means for stabilizing the sensed pr... | 08/15/1978 |
| 4100934 | Reciprocating refrigerant compressor valve arrangement An annular valve stop insert for a compressor body is shown which has the function of establishing the positional relationship of the valve plate, valve and compressor body.... | 07/18/1978 |
| 4081971 | Air cooled centrifugal refrigeration machine with provision to prevent evaporator freezing An air cooled centrifugal refrigeration machine is shown having an automatic shut-off valve in the liquid line to prevent natural circulation of refrigerant at low outdoor ambient temperatures that otherwise would cause freezing of the water in the evapor... | 04/04/1978 |
