Abstract: An apparatus for recovering and recycling refrigerant from an air conditioning unit. The apparatus includes a combined oil separator and heat exchanger for condensing purified refrigerant and for vaporizing contaminated refrigerant. The combined oil separator and heat exchanger includes a canister having a top wall, a bottom wall, and a substantially cylindrical side wall. The canister further includes a high pressure region comprising heat exchange coils and having high pressure inlet for providing purified refrigerant vapor and high pressure outlet for removing purified refrigerant liquid, and a low pressure region having low pressure inlet for introducing contaminated refrigerant proximate the heat exchange coils, low pressure outlet through the top wall for removal of refrigerant vapor, and condensed oil outlet for removal of condensed oil. By introducing the contaminated refrigerant proximate the heat exchange coils, improved separation efficiency is obtained.

Abstract: An injector for introducing a fluid composition into an air conditioning system is provided. The injector includes a pump including an internal volume having a first opening and a second opening, and a plunger which moves within the internal volume between a first position and a second position. The first opening includes a first valve for selectively allowing the fluid composition to flow from the internal volume as the plunger moves from the first position to the second position. The second opening includes a second valve for selectively allowing the fluid composition to flow into the internal volume as the plunger moves from the second position to the first position. A hose is provided having a first end connected to the first opening, and a second end constructed for attachment to a port on an air conditioning system. A cartridge including a fluid composition is provided fluidly connected to the second opening of the pump.

Abstract: A welder power supply configuration wherein the power supply includes a combined transformer and inductor assembly wherein the combined transformer and inductor assembly is comprised of a four-legged core, primary windings, secondary windings and inductor windings. The four-legged core includes isolation slits in the leg of the four-legged core shared by the inductor and transformer in order to isolate the magnetic flux of the inductor from the remaining lens in the four-legged core assembly.

Abstract: An apparatus for recovering and recycling refrigerant from an air conditioning unit. The apparatus includes a combined oil separator and heat exchanger for condensing purified refrigerant and for vaporizing contaminated refrigerant. The combined oil separator and heat exchanger includes a canister having a top wall, a bottom wall, and a substantially cylindrical side wall. The canister further includes a high pressure region comprising heat exchange coils and having high pressure inlet for providing purified refrigerant vapor and high pressure outlet for removing purified refrigerant liquid, and a low pressure region having low pressure inlet for introducing contaminated refrigerant proximate the heat exchange coils, low pressure outlet through the top wall for removal of refrigerant vapor, and condensed oil outlet for removal of condensed oil. By introducing the contaminated refrigerant proximate the heat exchange coils, improved separation efficiency is obtained.

Abstract: An apparatus for the treatment and recovery of spent vehicle coolant that involves the following steps:a) removing the spent coolant from the engine;b) treating the spent coolant with sodium dimethyldithiocarbamate to cause dissolved metals therein to form insoluble particles;c) treating the spent coolant of step b) with an aqueous basic coagulating agent such as a polyquaternary ammonium compound in its hydroxide form;d) filtering the spent coolant from step c) through a set of filters and then through a bed of carbon particles, to produce a relatively cleaner liquid; ande) adding to the relatively clear liquid a combination of corrosion inhibitors, buffering agents and alkali, whereby the treated coolant can be recycled to the vehicle for effective coolant performance therein.

Abstract: A process and apparatus for the treatment and recovery of spent vehicle coolant that involves the following steps:a) removing the spent coolant from the engine;b) treating the spent coolant with sodium dimethyldithiocarbamate to cause dissolved metals therein to form insoluble particles;c) treating the spent coolant of step b) with an aqueous basic coagulating agent such as a polyquaternary ammonium compound in its hydroxide form;d) filtering the spent coolant from step c) through a set of filters and then through a bed of carbon particles, to produce a relatively cleaner liquid; ande) adding to the relatively clear liquid a combination of corrosion inhibitors, buffering agents and alkali, whereby the treated coolant can be recycled to the vehicle for effective coolant performance therein.

Abstract: A battery charger which senses the percent of charge in a battery, selects automatically on a continuous basis a constant output charging voltage by switching between two different taps of a transformer, limiting the output voltage not to exceed 17.5 volts to protect the electronic components of the vehicle having the battery therein, against the adverse effects resulting from overcharging and compensating for changes in temperature to maintain a constant level of voltage in continuously charging a battery to the point of being fully charged.