Abstract: In a refrigerant compressor, a driving shaft is rotatably supported within a compressor housing by a bearing on a suction side. A trigger valve is provided in a passageway communicating a discharge pressure chamber with the bearing on the suction side. When pressure within the discharge pressure chamber is lower than a predetermined value, the trigger valve opens the passageway to permit gaseous refrigerant of high temperature within the discharge pressure chamber to be supplied to the bearing on the suction side.

Abstract: An oscillatory pump includes a cylinder (9) having normally-closed valves (10,13) of flexible material fixedly located at the inlet (A.sub.c) and outlet (B.sub.c) ends of the cylinder (9), and a piston (1) having an inlet (A.sub.p) and an outlet (B.sub.p). The piston (1) is reciprocatable within the cylinder (9) and is provided with a further valve (6) of flexible material movable with the piston (1) and located at the outlet end (B.sub.p) of the piston (1). The piston (1) is constructed to allow fluid to pass from an inlet chamber (C1) formed between the inlet valve (10) and the inlet end (A.sub.p) of the piston (1) to an outlet chamber (C2) formed between the further valve (6) and the outlet valve (13) in response of the piston (1) within the cylinder (9). The valve includes a valve seat having a generally conical first surface portion and a second surface portion located radially inwardly of the first surface portion and extending generally parallel to the axis of the first surface portion.

Abstract: A rotary vane vacuum pump assembly is disclosed which is characterized by the absence of the discharge of lubricating oil with the exhaust airstream, and which includes an internal stator and a surrounding rotor. Pivotal vanes are mounted on the interior of the rotor, so as to define a plurality of air chambers which expand and contract as the rotor rotates about the stator. Also, a freely rotatably cylindrical sleeve is positioned between the stator and vanes, so that the relative sliding contact of the vanes on the surface of the sleeve is minimized, to thereby eliminate the need for internal oil lubrication. In one preferred embodiment, a hydraulic pump is joined to the vacuum pump to form a compact assembly, and wherein the hydraulic pump supplies oil to the bearings which mount the rotor.

Abstract: An air cooled rotor for a rotary internal combustion engine, such as a Wankel type engine, in which the housing has a two-lobed epitrochoidal bore which forms the cavity, the rotor having an outer profile of generally equilateral triangular shape with outwardly curved sides, such as convexly curved sides, and the rotor being mounted on an eccentric journal of a main shaft and being geared to rotate in a planetary manner within the cavity at one third of the speed of rotation of the main shaft, the rotor comprising a body and an insert secured together by one or more rigid fasteners which extend into a passage part of the insert from a passage part of the body which opens to the outer profile of the rotor, the or each fastener extending transverse to the axis of rotation of the rotor, at an angle of between 70.degree. and 90.degree. to the axis.

Abstract: A vane cell pump comprises a housing having a small bore at one end extending to a large bore at the other end. A drive shaft for a pump package, i.e., a rotor, vanes and cam ring in said large bore. The other end of the housing is closed by a pressure plate against which one radial face of the pump package rotates, and which pressure plate is bolted to the housing. Another pressure plate within the large bore is pressed against the opposite radial face of the pump package by being exposed to an outlet pressure chamber of the pump. The area of the outlet pressure chamber to which the latter pressure plate is exposed is demarcated by axial sealing elements surrounding the drive shaft and exerting a compression force between a housing wall and the latter pressure plate. The construction effects a tight tolerance between relatively moving parts at all times including the start of pump operation.

Abstract: An arrangement for securing bins to a deck of a vehicle, which employs a tie-down frame. The tie-down frame includes longitudinally extending right angle members that extend along the outboard upper end edges of the bins and outboard transversely extending right angle end members that extend across the uppermost side edges of the outboard bins. Right angle members are fixed to the longitudinal members inwardly of the transverse end members to engage the outward corners of the intermediate bins. The tie-down frame also includes intermediate transversely extending channel-shaped members that extend along the top of the bins inwardly from the outboard transversely extending end members for receiving the tines of a fork lift truck to move the tie-down frame from place-to-place. The tie-down frame is placed along the top of the bins. Cables releasably secure the tie-down frame to the deck to prevent the bins from sliding along the deck.

Abstract: An apparatus, particularly for compressing and conveying fluids, comprising a rotor (1) and a thin-walled rotary sleeve (7) which is rotatably arranged eccentrically with respect to the axis (M1) of the rotor and which is in surface contact with the surface of the rotor throughout a predetermined angular range (.phi.). At least one separator slide (12) is provided between working chambers (S, D) the volumes of which vary when the rotary sleeve rotates. The apparatus is constructed such that the fluid throughput and the speed of rotation can be increased compared to conventional devices, so that a device of given capacity may have smaller dimensions and a lower weight.

Abstract: The screw machine comprises consecutively mounted screw mechanisms (6, 7 and 8, 9) incorporating coaxially arranged stators (10, 12 and 14, 16) and rotors (11, 13 and 15, 17) disposed therein whose axes are offset with respect to the central axis of the stators (10, 12 and 14, 16) by the amount of eccentricity "e" of the screw mechanisms (6, 7 and 8, 9). The screw mechanisms (6, 7 and 8, 9) are grouped into modules (4, and 5) and the modules proper are grouped into blocks (3). The axes of the rotors (11, 13, 15, 17) of the screw mechanisms (6, 7 and 8, 9) in the module (4 and 5) and the modules (4, and 5) proper in the block (3) are arranged symmetrically relative to the central axis.

Abstract: A structural improvement made in the air pump usable in either a single or a plurality of fish bowls. The diaphragms used to prevent the air from flowing in reverse are specially designed in a shape which can be inserted into the outlet of air circulating ports of the pump so as to prevent the diaphragms from slipping away and detaching from the air circulating ports, and finally losing the one-way discharge function accordingly.

Abstract: A screw compressor of the kind incorporating at least one male rotor and one female rotor, with helically extending lands and grooves. The female rotor (1) is injection moulded from a plastics material having a modulus of elasticity of at most 25,000 N/mm.sup.2. The lands (3) of the female rotor have a thickness (a) which is so adapted to the modulus of elasticity of the plastics material as to allow the lands to be deflected resiliently when clashing with the other rotor (2), as a result of dimensional deviations of the order likely to occur during hardening or curing of the plastics material, or at prevailing temperature variations, but not as a result of the pressure exerted by the working fluid. Due to the injection moulding the surface smoothness is fine enough to make subsequent finishing unnecessary and damages caused by lack of machining are avoided because of the resilient deflecting of the lands of the female rotor when clashing with the other rotor.

Abstract: A railroad car for transporting double stacked shipping containers capable of supporting top containers of at least two different lengths against longitudinal and lateral movement comprising a car which supports a lower container, each end of the car body having a bulkhead structure which includes a lateral end wall and a pair of side walls extending longitudinally inwardly from the end wall, each side wall of a pair of such walls having a container restraining member mounted for rotation about a vertical axis from a stored position where it does not reduce the clearance between opposing side walls to an operating position where it at least projects laterally inwardly of the side wall to be positioned adjacent a vertical end corner of a top container, a rotatable shaft extending laterally across the car body and having a handle at each end for manual rotation of the shaft from about track grade, and drive means interconnecting the shaft and a container restraining member on each side wall whereby rotation of

Abstract: A screw compressor lubrication channel for lubrication of a rotor bearing on the compressor's low pressure side, which is supplied with refrigerant droplets containing oil accompanying the inlet gas. This kind of lubrication is usually carried out by permitting a limited amount of gas and oil to flow from the high pressure side to the low pressure side via the bearings located on the low pressure side, and further to the inlet. By this working mode compressor capacity as well as compression work deposited is lost. This is avoided when the compressor according to the present invention is provided with a special, smaller inlet channel (7), which via the rotor bearing (3) opens out in a specific inlet port (8) located at an expanding rotor thread presenting a lower pressure than the inlet (6) pressure of the compressor.

Abstract: An external axial rotary piston blower having a housing including a casing part and two side parts of which the casing part encompasses a cylindrical runway surfacing which is formed by two cylinders intersecting each other in a region of an inlet and an outlet and in which two identical pistons having at least one wing portion rotate among each other, such pistons having starting surfaces with a large radius running against a casing runway surfacing and respectively another piston having a starting surface with a small radius running correspondingly against a casing runway surfacing. Shafts of the pistons are offset or shifted in cold condition in a direction of a short housing axis toward the outlet and the housing on the side of the outlet is shorter in axial direction in cold condition than on the side of the inlet.

Abstract: The compressor has a crankcase which is horizontally separable and has piston cylinders removably coupled to opposite ends thereof. The crankcase confines a pair of tie-rod-joined crossheads therein, and guides control reciprocation of the crossheads in horizontal and vertical planes. Inlet and discharge valves are all accessibly fastened to the cylinders, and oil buffers and gas seals set about piston rods inhibit insinuation of oil into the cylinders, and gas into the crankcase.

Abstract: A rotor housing for a rotary piston engine having improved gas sealing property between the inner surface and apex seals mounted on a rotor. The rotor housing has an inner surface applied with a hard layer such as chrome plating. The portions of the hard layer surrounding openings of plug holes at the inner surface side are formed with softened areas having lower hardness than the apex seals. The softened areas can be made by a high-energy beam such as a laser beam. Should portions surrounding the openings of the plug holes be thermally deformed to project inward and scratch the apex seals, the projected portions formed of the softened areas will be worn before the apex seals. Hence, uneven wearing of the apex seals can be avoided, which prevents degradation of the gas sealing property and consequently prevents drop in the compression pressure in the working chambers.

Abstract: The engagement parts of the external rotor of a single rotation are provided with at least one cooling air duct. The inflow takes place by an inflow duct provided in the casing side plate and which is surrounded by the antifriction bearing mounting the external rotor, while the outflow takes place radially through openings provided in the circumferential wall of the casing.

Abstract: A displacement pump has a pump chamber connected with an inlet valve chamber and an outlet valve chamber. The chambers are arranged so that a cleaning tool has a direct cleaning path through the inlet valve chamber, its connection to the pump chamber, the connection of the outlet valve to the pump chamber and the outlet valve.

Abstract: A device for supplying a lubricant comprises a receptacle to contain the lubricant with an opening arranged in the bottom thereof. A piston member is sealingly displaceable along the walls inside the receptacle and located in initial position near the top of the receptacle. At least one extendable or expandable member is supported by the receptacle at the circumference over the lubricant present in the receptacle with a bottom portion located near and above the piston member which member contains an electrolyte. At least one galvanic element is supported over the electrolyte inside the receptacle, and a flexible member and rupturable support are provided for bringing the galvanic element into contact with the electrolyte. The said extendable or expandable member with the electrolyte present therein and the galvanic element form a separate assembly detachable from the receptacle.

Abstract: A compressor assembly including an electric motor and a compressor crankcase. The compressor crankcase includes a suction inlet. A motor casing is secured to the crankcase. The suction inlet is connected by means of a first passage to the interior of the motor casing. A baffle located in the motor casing causes a portion of the inflowing refrigerant suction gas to be diverted to flow over and cool the rear windings of the motor. The remainder of the inflowing gas is caused to flow over and cool the front windings of the motor. After flowing over the windings, the two portions of the suction gas are recombined and the suction gas is then caused to flow out of the motor casing to the compressor cylinder suction inlet.

Abstract: A reversible gear-type pump providing constant fluid delivery direction on alternating drive direction in which an eccentric ring receiving the outer rotor is pivotal through 180.degree. between two end positions by frictional engagement with the outer rotor wherein the eccentric ring is made contractible as a whole to establish the coupling engagement with the outer rotor and expandable to disengage the coupling engagement. The eccentric ring can be made in one piece from resilient material or can be formed from a plurality of arcuate segments which are pressed together by an annular spring engaging around them.