Abstract: A fluid machine includes a first rotor having a first rotor first working portion and a first rotor second working portion, a second rotor having a second rotor first working portion configured to mesh with the first rotor first working portion and a second rotor second working portion configured to mesh with the first rotor second working portion and rotate independently from the second rotor first working portion.

Abstract: A fluid machine is provided with a first rotor having a first rotor first working portion and a first rotor second working portion, a second rotor having a second rotor first working portion configured to mesh with the first rotor first working portion and a second rotor second working portion configured to mesh with the first rotor second working portion and rotate independently from the second rotor first working portion.

Abstract: A method for expulsion of a fluid inside a compressor at start-up including the steps: applying a first signal to the motor windings for a first duration of time to align the motor rotor to the initial position; applying a second signal to the motor windings to start rotation of the compressor shaft; applying a third signal to the motor windings for a second duration of time to hold the compressor shaft in place; and applying a fourth signal to the motor windings to accelerate the motor to an operational speed.

Abstract: A shaft sealing mechanism is provided including a first component having a first surface and a second component having a second surface. The first component and the second component are arranged in contact such that the first surface and the second surface form a dynamic interface. The first surface includes a conformable carbon or carbon-graphite material. The second surface includes a rigid, highly polished, silicon carbide material having a plurality of graphite particles embedded therein.

Abstract: A method for expulsion of a fluid inside a compressor at start-up including the steps: applying a first signal to the motor rotor windings for a first duration of time to align the motor rotor to the initial position; applying a second signal to the motor rotor windings to start rotation of the compressor shaft; applying a third signal to the motor rotor windings for a second duration of time to hold the compressor shaft in place; and applying a fourth signal to the motor rotor windings to accelerate the motor to an operational speed.

Abstract: A transport refrigeration system with a direct drive compressor arrangement is provided with a variable speed electrically driven booster compressor that operates in series with the direct drive compressor. The speed of the booster compressor is controlled to either boost or decrease the system capacity. The booster compressor also acts to regulate the flow of refrigerant from the evaporator during periods of operation in which the direct drive compressor might otherwise become overloaded.

Abstract: An integrated transport refrigeration unit comprises an engine providing power to drive a shaft. The shaft drives a refrigerant compressor and a generator, both of which being encased within a housing, and the generator is immersed in refrigerant. In an exemplary embodiment, an integrated transport refrigeration unit also includes an auxiliary generator driven by the shaft and disposed externally from said housing. In this embodiment, the auxiliary produces current for charging a battery and for operating a fan.

Abstract: A transport refrigeration system with a direct drive compressor arrangement is provided with a variable speed electrically driven booster compressor that operates in series with the direct drive compressor. The speed of the booster compressor is controlled to either boost or decrease the system capacity. The booster compressor also acts to regulate the flow of refrigerant from the evaporator during periods of operation in which the direct drive compressor might otherwise become overloaded.

Abstract: The pumping capacity of an unloadable air conditioning compressor is switched between full and part capacity states. The part capacity state is established during on/off cycling of the compressor, and air conditioning load conditions are sensed during operation of the compressor to control capacity switching in a manner to provide efficient and responsive performance. Refrigerant pressure at the evaporator outlet is used to control on/off cycling as well as capacity cycling, and the rate of decrease of such pressure is used as an indication of the air conditioning load.

Abstract: A reciprocating piston swash plate refrigerant compressor is disclosed having a variable pumping capacity control arrangement wherein the pumping capacity is varied by effecting communication between the compressor's suction side and one or more of the cylinders during compression. Such communication is provided by a bypass valve controlling an additional suction port formed in the head end of the cylinder in parallel with the normal valve controlled suction port therefor. The bypass valve is urged to open the bypass port by cylinder pressure acting directly and continuously on a small pressure responsive area thereof and is urged to close the bypass port by discharge pressure delivered to act on a large pressure responsive area thereof under the control of a separate control valve which alternatively communicates suction side pressure with the large pressure responsive area when it is desired to permit the bypass valve to be opened by the cylinder pressure.

Abstract: A multicylinder refrigerant compressor is disclosed having double-ended pistons operating in aligned cylinder bores of a cylinder block to discharge refrigerant from the opposite ends thereof to discharge chambers formed in opposite ends of the compressor. A muffler arrangement is completely formed within the compressor and comprises a separate attenuation chamber ported at one of two opposing ends thereof directly to each discharge chamber. Each attenuation chamber is formed within and as an integral part of the cylinder block between two adjacent cylinder walls thereof and an elongated attenuation passage directly connects the attenuation chambers at their other end. The attenuation passage is also formed in and as an integral part of the cylinder block and extends between the two aforesaid adjacent cylinder walls.

Abstract: A compact lightweight multicylinder swash plate compressor is disclosed having a metallic double-ended piston with piston heads reciprocated in aligned metallic cylinder bores. Each piston head has a diametrical dimension substantially less than the diametrical dimension of its respective bore to provide a substantial annular space therebetween and a solid seal-support ring of slippery material is expanded over each piston head and contracts into a circumferential groove therein. Each ring is sufficiently thick that the memory recovery thereof after further contraction forced by a tool causes the ring to sealingly engage its respective bore immediately after assembly with its piston head therein. The metal of the piston head on opposite sides of the groove is thereby prevented from touching the metal of its respective bore throughout its reciprocation in the bore. Each ring groove is formed with a plurality of projections which are spaced about and project outward from the bottom thereof.