Abstract: A device and method are described for extending the life of check valves. An improved check valve having a double poppet and tapered guides is more robust, and a check valve protection device between the check valve and the environment into which fluid is injected protects the valve from a contaminating or corrosive environment. The check valve and check valve protection device are small and light weight to prevent vibration-induced failures. The check valve protection device preferably has an interior volume that fills quickly by relatively few cycles of the lubricant pump to reduce delay of lubricant to the injection point.

Abstract: The invention concerns a refrigerant compressor (1), particularly a semi-hermetic refrigerant compressor, with a housing (2), having in its bottom part (3) an oil sump (4), a compressor block (5) having at least one cylinder (6), in which a piston (7) is arranged, a crankshaft (11), which is supported in the compressor block (5) and in driving connection with the piston (7), and an oil pump arrangement (27), which is at least partly submerged in the oil sump. Also with varying speeds, good oil lubrication must be ensured. For this purpose, the crankshaft (11) has at its lower end a diameter extension (19), through which an oil channel (35) extends eccentrically to the crankshaft axis (36), said channel (35) connecting the oil pump arrangement (27) to a closed oil pressure chamber (21) between the crankshaft (11) and the compressor block (5), said chamber (21) being connected to the inside (37) of the housing (2) via a vent path (40, 41).

Abstract: The invention concerns a refrigerant compressor (1), particularly a semi-hermetic refrigerant compressor, with a housing (2), having in its bottom part (3) an oil sump (4), a compressor block (5) having at least one cylinder (6), in which a piston (7) is arranged, a crankshaft (11), which is supported in the compressor block (5) and in driving connection with the piston (7), and an oil pump arrangement (27), which is at least partly submerged in the oil sump. Also with varying speeds, good oil lubrication must be ensured. For this purpose, the crankshaft (11) has at its lower end a diameter extension (19), through which an oil channel (35) extends eccentrically to the crankshaft axis (36), said channel (35) connecting the oil pump arrangement (27) to a closed oil pressure chamber (21) between the crankshaft (11) and the compressor block (5), said chamber (21) being connected to the inside (37) of the housing (2) via a vent path (40, 41).

Abstract: A rotary screw type pump is provided with internal cavities within the rotors. The rotors include shaft portions that extend out from the casing that contains the screw portion of the rotors. The cavities extend from the screw portion of the rotors at the compression side of the casing to the shaft portion of the rotors. The cavities are charged with a fluid and may include a porous wick in order to act similar to a heat pipe for removing the heat generated during pump compression. The heat is transferred to the shaft portion of the rotors. The shaft portion of the rotors extend into a cavity that contains a coolant. A water jacket surrounds the cavity. The heat is transferred from the shaft portion of the rotors to the coolant and then the water jacket for removal. The heat transfer from the shaft portions to the coolant may be facilitated with the use of fins.

Abstract: A rotary screw type pump is provided with internal cavities within the rotors. The rotors include shaft portions that extend out from the casing that contains the screw portion of the rotors. The cavities extend from the screw portion of the rotors at the compression side of the casing to the shaft portion of the rotors. The cavities are charged with a fluid and may include a porous wick in order to act similar to a heat pipe for removing the heat generated during pump compression. The heat is transferred to the shaft portion of the rotors. The shaft portion of the rotors extend into a cavity that contains a coolant. A water jacket surrounds the cavity. The heat is transferred from the shaft portion of the rotors to the coolant and then the water jacket for removal. The heat transfer from the shaft portions to the coolant may be facilitated with the use of fins.

Abstract: A lubrication system for the rotor bearing in a rotary-trochoidal engine including an oil passage extending through the housing of the engine and another oil passage extending through the eccentric to communicate with the eccentric surface carrying the rotor bearing, wherein oil is collected from one oil passage and transferred into the other for lubrication of the rotor bearing.

Abstract: An air motor includes an arrangement such that a part of an exhaust air from a cylinder of the air motor passes through a gear chamber containing a gear mechanism which links a gear fixed to a shaft directly connected to a rotor with a power output shaft and is discharged through a silencer.

Abstract: A rotary compressor having a housing with an epitrochoidal inner boundary and a rotor mounted on an eccentric shaft having an inlet port and exhaust port positioned in the working chambers at a neutral pressure zone where the ullage volume expands to a pressure equal to the pressure at the inlet port. The lubricant for the rotor apex seals is supplied under pressure through a restrictor to a lubricating slot positioned transversely in the epitrochoidal inner boundary of the housing adjacent to the inlet aperture at the neutral pressure zone.

Abstract: An improved slant axis rotary mechanism including a housing defining an operating chamber, the operating chamber having an outer spherical wall, an inner spherical wall and opposed, generally radially extending end walls extending between the inner and outer spherical walls. A rotor is located within the chamber and includes a spherical hub carrying seals engaging the inner spherical wall and an annular flange carrying seals engaging both the end and outer spherical walls. A shaft is journalled in the housing and has an angularly offset portion within the chamber which, in turn, journals the rotor and gears carried by the rotor and the housing establish a timed rotary relationship between the shaft and the rotor. At least one elongated slot is provided in one of the walls and opens into the chamber. Means are provided for supplying a lubricant to the slot for lubricating the seal on the rotor engaging the wall having the slot.

Abstract: A rotary piston internal-combustion engine adapted to operate on a hydrogen fuel gas mixture injected into the intake chamber of the engine through a plurality of spaced intake ports in the engine housing designed to distribute the flow of the fuel gas mixture evenly along the width of the intake chamber. The exhaust gas outlet of the engine includes a plurality of spaced small exhaust ports so as to decrease the dwell of the apex seal of the rotary piston as it passes over the exhaust gas outlet. The fuel supply system to the engine includes a plurality of mixing chambers to ensure thorough and uniform mixing of the fuel gas mixture, an intake header for distributing the fuel gas mixture to the intake ports, and means for preventing back-fire of the fuel gas mixture in the system. Lubricant may be supplied to the interior of the engine through the fuel intake ports in the form of a lubricating vapor in admixture with the fuel gas mixture.