Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7310965 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 12/25/2007 |
| 7272953 | Method and apparatus for separating and neutralizing ammonia The present invention is a method and apparatus to provide for the safe and effective removal and neutralization of ammonia from a stream of waste oil or other liquid. The apparatus consists of a receiving tank, a treatment tank, circulation piping, associated contr... | 09/25/2007 |
| 7254957 | Method and apparatus for cooling with coolant at a subambient pressure According to one embodiment, an apparatus includes a fluid coolant and structure which reduces a pressure of the fluid coolant through a subambient pressure at which the coolant has a cooling temperature less than a temperature of the heat-generating structure. The ... | 08/14/2007 |
| 7204091 | Maintenance and cleaning for an ice machine An ice-making machine and method of maintaining and cleaning an ice-making machine are provided. The ice-making machine has predictive maintenance and cleaning. Operational conditions of the ice-making machine, such as, for example, water quality, are used to establ... | 04/17/2007 |
| 7159412 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 01/09/2007 |
| 7140260 | Gas flow measuring device and gas flow measuring method The present invention realizes (i) a gas flow measuring device which can measure a gas flow of a low-boiling gas in a mixed gas including two types of gasses having different boiling points, and (ii) a method of measuring a gas flow easily but highly precisely, usin... | 11/28/2006 |
| 7073346 | Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 07/11/2006 |
| 7013660 | System for forming aerosols and cooling device incorporated therein The present invention relates a cooling device of the reverse Carnot cycle-type using a refrigerant, and an aerosol generation system including it. The cooling device includes a refrigerator of the reverse Carnot cycle-type, a cleaning medium conduit, a temperature ... | 03/21/2006 |
| 7000691 | Method and apparatus for cooling with coolant at a subambient pressure An apparatus includes heat-generating structure disposed in an environment having an ambient pressure, and a cooling system for removing heat from the heat-generating structure. The cooling system includes a fluid coolant, structure which reduces a pressure of the c... | 02/21/2006 |
| 6959610 | Manual purge system for instrumentation flow element tubing An improved manual purge system for periodically cleaning pressure sensing flow element tubing is provided that is a complete self-contained system for allowing manual determination and initiation of flow element purging. Additionally, the system can be easily upgra... | 11/01/2005 |
| 6957550 | Method and apparatus for extracting non-condensable gases in a cooling system A cooling technique involves: reducing a pressure of a cooling fluid to a subambient pressure at which the cooling fluid has a boiling temperature less than a temperature of a heat-generating structure; bringing the cooling fluid at the subambient pressure into ther... | 10/25/2005 |
| 6937471 | Method and apparatus for removing heat from a circuit An apparatus includes a circuit having a heat-generating circuit component, and structure for guiding a two-phase coolant along a path which brings the coolant into direct physical contact with either the circuit component or a highly thermally conductive part which... | 08/30/2005 |
| 6755029 | Ammonia separator and neutralizer The present invention is a method and apparatus to provide for the safe and effective removal and neutralization of ammonia from a stream of waste oil or other liquid. The apparatus consists of a receiving tank, a treatment tank, transfer piping, associated controls... | 06/29/2004 |
| 6705100 | Purge A purging device for a system accumulating condensable and non-condensable gases. The purging device comprises: a purge tank; apparatus receiving the condensable and non-condensable gases from the system and directing said gases into the purge tank; apparatus conden... | 03/16/2004 |
| 6647736 | Purge A purging device for a system accumulating condensable and non-condensable gases. The purging device comprises: a purge tank; apparatus receiving the condensable and non-condensable gases from the system and directing said gases into the purge tank; appar... | 11/18/2003 |
| 6564564 | Purge A purging device for a system accumulating condensable and non-condensable gases. The purging device comprises: a purge tank; apparatus receiving the condensable and non-condensable gases from the system and directing said gases into the purge tank; appar... | 05/20/2003 |
| 6467301 | Refrigeration system with purge The improved refrigeration system also includes a tee having a stem portion extending horizontally from the condenser of the system, and a pair of upper and lower arms connected in a vertical orientation to the stem. The tee lower arm is connected to the ... | 10/22/2002 |
| 6336343 | Two-stage absorption refrigerating apparatus A two-stage absorption refrigerating apparatus includes an integrated drum in which a low-pressure evaporator and a low-pressure absorber are arranged in an upper part and a high-pressure evaporator and a high-pressure absorber are arranged in a lower par... | 01/08/2002 |
| 6263694 | Compressor protection device for refrigeration systems A device is added to a refrigeration system to protect the compressor from liquid slugging. The device traps liquid slugs in the suction pipe and then injects the trapped slugs into the discharge pipe. Any refrigerant within the injected slug is quickly v... | 07/24/2001 |
| 6263691 | Refrigerant recovering apparatus and refrigerant recovering method This refrigerant recovery system is provided with recovery piping 2, heat exchangers 25, 26 and check valves 30, 31, 37, 38. A refrigerant within the recovery piping 2 is heated and cooled by the heat exchangers 25, 26, so that a fluid power is imparted t... | 07/24/2001 |
| 6247330 | Absorption type refrigerator For minimizing declination of the operational efficiency, hydrogen gas generated in an absorption type refrigerator is eliminated by reduction without exhausting to the outside. The hydrogen gas H2 remains close to the level surface 93 of a ref... | 06/19/2001 |
| 6138462 | Refrigerant recovery and recharging system with automatic oil drain A conduit is coupled to an oil accumulator with an orifice coupled in series with the conduit for limiting the flow of oil therethrough. A pressure sensor is coupled to the conduit for measuring the pressure in the conduit. An oil drain control solenoid v... | 10/31/2000 |
| 6134899 | Refrigerant recovery and recharging system with automatic air purging Conduits are coupled to a supply tank of refrigerant to allow the sensing of the amount of air present in the refrigerant tank and, upon the detection of air, the purging of air from the tank with a minimal loss of refrigerant. Preferably, the conduits in... | 10/24/2000 |
| 6055821 | Purge system for an absorption air conditioner Apparatus for purging non-condensable gases from an absorption system containing a purge tank connected to the system absorber for collecting non-condensables. A vacuum pump is connected to the tank for drawing the non-condensable gases from the tank and ... | 05/02/2000 |
| 5921097 | Purge processor A purge processor for purging air and other noncondensibles from refrigeration systems or refrigeration handling systems includes: an inlet gas connector for receiving a gaseous mixture of noncondensibles and refrigerant; a first and second refrigerant re... | 07/13/1999 |
| 5910160 | Enhanced refrigerant recovery system A refrigerant recovery system for use in connection with a refrigeration system having an evaporator, a compressor, and a condenser, and a purge unit connected to the condenser for receiving gaseous refrigerant and non-condensable gases from the condenser... | 06/08/1999 |
| 5906106 | Refrigerant air analyzer and purge system A refrigerant air analyzer and purge system for detecting and purging air within a refrigerant system or supply. The analyzer includes a vented test chamber, means for controlling a flow rate of refrigerant and an oxygen sensor. The means for controlling ... | 05/25/1999 |
| 5806322 | Refrigerant recovery method A refrigerant recovery system for use in connection with a refrigeration system having an evaporator, a compressor, and a condenser, and a purge unit connected to the condenser for receiving gaseous refrigerant and non-condensable gases from the condenser... | 09/15/1998 |
| 5664424 | Refrigerant handling system and method with air purge and multiple refrigerant capabilities A refrigerant handling system that includes a closed chamber having an inlet for directing refrigerant in liquid phase into the chamber such that the refrigerant collects at a lower portion of the chamber and non-condensibles are trapped in the upper port... | 09/09/1997 |
| 5623833 | System and method for recovering and separating non-condensing gases from a halocarbon composition A high efficiency, high rate system for recovering and removing non-condensable gases from a halocarbon composition. A collection tank with an integral heat exchanger unit is submerged in a liquid heat transfer medium and coupled to the halocarbon composi... | 04/29/1997 |
| 5605054 | Apparatus for reclaiming refrigerant An apparatus for reclaiming refrigerant including a distillation tank, an eliminator arranged within an upper portion of said distillation tank, a booster connected to an upper end of the distillation tank for extracting refrigerant vapor from the distill... | 02/25/1997 |
| 5598714 | Method and apparatus for separation of refrigerant from a purge gas mixture of refrigerant and non-condensible gas A method and apparatus are disclosed for separation of non-condensible gas from recovered refrigerant collected in a collector tank. Non-condensible gas is intermittently vented from the collector tank. The vented non-condensible gas is directed to an acc... | 02/04/1997 |
| 5592826 | Air conditioning systems with purge An air conditioning system includes a self-regulating flow controller having no moving parts that provides a liquid seal between a purge vessel and the evaporator barrel of a chiller. Circulating refrigerant fluid from a primary air conditioner is preheat... | 01/14/1997 |
| 5582023 | Refrigerant recovery system with automatic air purge A portable apparatus for recovering refrigerant from a refrigeration system and delivering the refrigerant to a refrigerant storage tank. The recovery is automatically terminated when the liquid refrigerant occupies 80% of the volume of the recovery tank.... | 12/10/1996 |
| 5582019 | Method and apparatus for recovering and purging refrigerant Apparatus for recovering refrigerant from a refrigeration system having a high pressure liquid side and a low pressure vapor side comprises a storage receptacle for receiving recovered refrigerant, a liquid flow circuit for recovering liquid from the high... | 12/10/1996 |
| 5544492 | Refrigerant handling system and method with air purge and multiple refrigerant capabilities A refrigerant handling system that includes a chamber for holding refrigerant, and a refrigerant pump for directing refrigerant into the chamber so that the refrigerant collects in liquid phase at a lower portion of the chamber while air and other non-con... | 08/13/1996 |
| 5535596 | Refrigerant reclamation and purification apparatus and method A portable refrigerant reclamation and purification apparatus removes moisture, oil, solid particulates, non-condensables, acid and other contaminants from refrigerant. Contaminated refrigerant is introduced into a separation chamber and vaporized as it p... | 07/16/1996 |
| 5517825 | Refrigerant handling system and method with air purge and system clearing capabilities A refrigerant handling system that includes an air purge chamber and a refrigerant pump for directing refrigerant into the air purge chamber so that the refrigerant collects in liquid phase at a lower portion of the chamber while air and other non-condens... | 05/21/1996 |
| 5515690 | Automatic purge supplement after chamber with adsorbent A purge supplement includes a vessel that attaches to a gas discharge line of a purge system. Adsorbent material is disposed within the vessel. In a Vent Mode the purge system vents into the vessel and the vessel vents to the atmosphere, whereby the purge... | 05/14/1996 |
| 5501082 | Refrigeration purge and/or recovery apparatus An improved refrigerant recovery method and apparatus by which a refrigerant charged in a refrigerator is transferred into a refrigerant tank are disclosed. The apparatus is adapted to discharge almost all the refrigerant gas from the refrigerator and pur... | 03/26/1996 |
