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| Number | Title | Issue Date |
| 4824907 | Preparation of thermoformed plastics articles Moulded articles of uniform wall thickness are prepared by vacuum-forming or thermoforming a composition comprising a uniform blend of, as base resin, a moulding grade resin having a continuous phase of a first copolymer of a styrenic monomer and an ethyl... | 04/25/1989 |
| 4798865 | Thermoplastic polyamide--polyphenylene ether compositions Compositions comprising a carboxylated PPE resin and a polyamide having good compatibility and impact properties. The carboxylated PPE resin/polyamide alloys are produced by a process wherein a mixture consisting essentially of the PPE resin and a minor a... | 01/17/1989 |
| 4517810 | Environmental control system An environmental control system for controlling the environmental conditions in a swimming pool hall 1 comprises a heat pump having a multi-section evaporator 8, compressors 23a and 23b and a multi-section condensor 18. In the day-time, the dry bulb tempe... | 05/21/1985 |
| 4414818 | Environmental control system An environmental control system has an evaporator section comprising an evaporator for extracting heat from (and dehumidifying) air destined for the controlled space or for exhaust--this air may be a controlled mixture of fresh and recycled air--and a chi... | 11/15/1983 |
| 4407185 | Return air flow control for variable air volume system A variable air volume (VAV) system in which the inflow of outside air is maintained above a predetermined value by maintaining a substantially fixed negative pressure in the plenum by the use of a static pressure sensor and control system for controlling ... | 10/04/1983 |
| 4364237 | Microcomputer control for inverter-driven heat pump A heat pump system in which the compressor speed is varied in response to load conditions by a programmed control system and the indoor coil fan speed, during heating operations, is proportioned to compressor speed as further modified by the outdoor air t... | 12/21/1982 |
| 4355948 | Adjustable surge and capacity control system An adjustable surge and capacity control system for matching a capacity control system to an inverter-driven centrifugal compressor based liquid chiller having unknown surge characteristics. The necessary adaptation of the capacity control circuit to a pa... | 10/26/1982 |
| 4346845 | Gas burner A gas burner is provided with a shaped part at its upstream end for the admission of primary air and gas, the shaped part 24 being monolithic with the burner and having openings 34, 36 for the admission of primary air from above, and is downwardly open fo... | 08/31/1982 |
| 4314456 | Refrigerant condensing system A refrigerant condensing system for heating water includes a thermostatically-operated valve for delivering 140° F. water from a condenser to the top of a water storage tank and a by-pass valve for allowing the heated water from the condenser, which is t... | 02/09/1982 |
| 4311498 | Desuperheater control system in a refrigeration apparatus A desuperheater control system for use in a refrigeration apparatus includes a thermostatic expansion valve which responds to the temperature and pressure at the outlet of a desuperheater for bypassing refrigerant flow from the condenser back to the sucti... | 01/19/1982 |
| 4282718 | Evaporator inlet water temperature control system An evaporator inlet water temperature control system for controlling the inlet water temperature of an evaporator utilized in an inverter driven centrifugal chiller. The system creates the proper chilled water set point at the evaporator outlet needed to ... | 08/11/1981 |
| 4279298 | Heat exchanger with condensate blow-off suppressor A heat exchanger having a flow of air therethrough adapted for use in refrigeration systems includes a heat exchange coil and a plurality of sheet-like fins. The coil is formed of a plurality of tubes having a cooling medium flowing therethrough. Each of ... | 07/21/1981 |
| 4275987 | Adjustable surge and capacity control system An adjustable surge and capacity control system for matching a capacity control system to an inverter-driven centrifugal compressor based liquid chiller having unknown surge characteristics. The necessary adaptation of the capacity control circuit to a pa... | 06/30/1981 |
| 4270255 | Method of manufacturing a swash plate assembly An improved method of manufacturing a swash plate assembly for use in a compressor, fluid motor or similar device in which a plurality of pistons are connected, by means of connecting rods, to a swash plate which drives (or is driven by) the pistons. A pl... | 06/02/1981 |
| 4269261 | Microcomputer control for supplemental heating in a heat pump An apparatus and method for controlling continuously and discretely the speed of a heat pump compressor as a function of load conditions to run at least up to 150% of its rate-speed when operated in the heating mode to provide initial supplemental heating... | 05/26/1981 |
| 4265299 | Heat pump control system A control system for a heat pump having at least one stage of supplemental heaters, said control system including an electronic thermostat capable of (1) sensing the rate of change of the temperature in the (indoor) conditioned space; and (2) bringing on ... | 05/05/1981 |
| 4265298 | Microcomputer control for supplemental heating with night set-back An apparatus and method for controlling the sequential operation of supplemental electric heaters so that the amount of energy consumption is minimized. The operation of the heaters is prevented as long as a lower night set-back temperature can reach the ... | 05/05/1981 |
| 4265093 | Evaporator feed and control system An evaporator feed and control system maintains a relatively high level of stability over a wide range of varying loads. The evaporator system includes a first evaporator having a multiple pass inlet and a single pass outlet, and a second evaporator havin... | 05/05/1981 |
| 4257238 | Microcomputer control for an inverter-driven heat pump An apparatus and method for controlling continuously and discretely the speed of an indoor evaporator fan motor and the speed of the compressor as a function of the fan speed for regulating the dry bulb temperature and relative humidity of a conditioned s... | 03/24/1981 |
| 4252186 | Condenser with improved heat transfer An improved condenser including a longitudinal extending baffle and a series of transversely extending baffle plates creating a desired flow path for vapor to be cooled which is introduced into a shell. The condenser is characterized by high efficiency pe... | 02/24/1981 |
| 4251997 | Control of absorption systems energized from plural storage tanks maintained at different temperatures An absorption refrigeration system is adapted to be energized by plural sources of a heating system stored at different temperatures. A control system automatically selects the proper source of supply to the generator in response to the temperatures of th... | 02/24/1981 |
| 4221116 | Temperature compensated control for air conditioning system or heat pump A temperature compensated safety control is employed to shut off the compressor at high compression ratios, caused, for example, by reduced air flow over the condenser or other reasons. This is especially useful on both reverse cycle heat pumps and conven... | 09/09/1980 |
| 4220013 | Pressure compensated control for air conditioning system or heat pump A pressure compensated safety control is employed to shut off the compressor at high compression ratios, caused, for example, by reduced air flow over the condenser or other reasons. This is especially useful on both reverse cycle heat pumps and conventio... | 09/02/1980 |
| 4194368 | Combination split system air conditioner and compression cycle domestic hot water heating apparatus A conventional split system air conditioner is combined with a compression cycle or heat pump system for supplying heat to a domestic water heater. The units are combined in such a way that significant energy savings can be achieved by circulating air in ... | 03/25/1980 |
| 4178135 | Variable capacity compressor A controlled, variable displacement swash plate compressor is provided with means for controlling the capacity pivoting the swash plate about the drive shaft axis to vary the effective pumping capacity. The position of the swash plate with respect to the ... | 12/11/1979 |
| 4174191 | Variable capacity compressor A controllable, variable displacement swash plate compressor including a centrally pivoted swash plate on a rotating shaft. Control means are provided to increase or decrease the angle of inclination of the swash plate in response to changes in suction pr... | 11/13/1979 |
| 4172696 | Low stress suction or discharge reed valve for compressor An improved low stress reed valve especially adapted for use as a suction or discharge valve in a reciprocating compressor or the like. The geometry and the relationship of certain key dimensions result in a substantially reduced stress on the valve, thus... | 10/30/1979 |
| 4164128 | Absorption refrigeration system and control An absorption refrigeration system is adapted to be powered by solar energy or a source of relatively low temperature waste heat. A control system automatically adjusts the maximum energizing temperature as the temperature of the cooling water, used to co... | 08/14/1979 |
| 4155529 | Motor mount A motor mount suitable for use, for example, in a motor driven fan assembly or the like in which the motor is secured to the fan housing. The mount includes clamps for supporting the opposite ends of the motor and is adjustable to accommodate motors havin... | 05/22/1979 |
| 4145163 | Variable capacity wobble plate compressor A controlled, variable displacement wobble plate compressor is provided with means for controlling the capacity by sliding the wobble plate to and fro along the drive shaft axis to vary the effective pumping capacity. The position of the wobble plate alon... | 03/20/1979 |
| 4133183 | Solar powered absorption refrigeration system An absorption refrigeration system utilizes a solar collector in the heat input circuit and includes means within the collector housing for condensing water vapor released from the absorbent solution. Ambient air abstracts heat from the vapor and causes c... | 01/09/1979 |
| 4132300 | Disconnect mechanism for compressor drive An improved disconnect or power stop mechanism adapted for use in a refrigerant compressor drive system. A soldered connection is operative to initiate a disconnect or declutching action between the driving and driven members if the system should happen t... | 01/02/1979 |
| 4132512 | Rotary sliding vane compressor with magnetic vane retractor A rotary sliding vane compressor is provided with magnetic vane retractor means to control the pumping capacity of the compressor without the use of an on/off clutch in the drive system.... | 01/02/1979 |
| 4125180 | Disconnect mechanism for compressor drive An improved disconnect or power stop mechanism adapted for use in a refrigerant compressor drive system. A temperature responsive element triggers a disconnect or declutching action between the driving and driven members if the system should happen to los... | 11/14/1978 |
| 4102390 | Control system for heat pump and furnace combination A residential-type, heat pump-furnace system with control means for sequencing the activation of the heat pump and furnace operation depending on the heating load. The heat pump remains operational until the air off the furnace has reached some predetermi... | 07/25/1978 |
| 4100935 | Check valve for heat pump systems An improvement in ball-type check valves of the type used in heat pump systems. The valve is designed so that the pressure differential across the ball is significantly higher than in prior art devices. This assures that the ball is held away from the sea... | 07/18/1978 |
| 4100756 | Solar powered absorption refrigeration system An absorption refrigeration system utilizes a solar collector in the heat input circuit.... | 07/18/1978 |
| 4091638 | Cooling system for hermetic compressor A hermetic rotary refrigerant compressor is provided with means for handling the oil and refrigerant vapor mixture to provide sufficient cooling of the motor without external precoolers and related conduits and apparatus. In a preferred embodiment, the oi... | 05/30/1978 |
| 4089188 | Evaporator coil An improved evaporator coil assembly for use in a split system air conditioner. The unit may be installed for heating and cooling operation in one of the following positions: (1) Horizontal; (2) Vertical upflow; or (3) Vertical downflow. It is equipped wi... | 05/16/1978 |
| 4083197 | Air conditioner control system A control system for air conditioning apparatus particularly of the type utilizing a variable displacement compressor, the capacity of which is modulated in response to a cooling demand control signal. More specifically, the capacity of the compressor is ... | 04/11/1978 |
