Abstract: In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the invention includes the self-start synchronous motor which starts as an induction-motor and performs synchronous operation by performing synchronization pull-in almost at a synchronous rotational frequency, a compression part having a compression chamber which compresses a working fluid, and a hermetic container which houses the self-start synchronous motor and the compression part. The displacement type compressor is provided with a start load reducing means which reduces a load of the compression part at startup and is-placed at the compression part in the hermetic container.

Abstract: A second frame is arranged between a first frame and an orbiting scroll, and a central space and an outer peripheral space are sealed off by a seal portion, which is formed between an end surface of a shaft support of the orbiting scroll and the second frame. Also, a balance weight is arranged in a space between an underside of the second frame and the first frame. Thereby, most of an oil having lubricated respective shaft supports flows into the space below the second frame, and the oil accumulated in the space is discharged through an oil scavenge pipe into an oil reservoir in a lower portion of a closed vessel. Also, since the balance weight can be assembled from a side of the orbiting scroll in a state, in which the second frame is removed, it is possible to mount the balance weight close to the orbiting scroll.

Abstract: A novel combined engine for a single-stage spacecraft is provided that combines a air-breathing engine utilizing oxygen in the atmosphere as oxidizer and rocket engines for obtaining thrust outside the atmosphere and that does not require a portion whose shape is variable in accordance with the flight speed. Rocket engines 15 are provided on struts 12 that form air introduction channels 10 in the air intake section 4. The rocket jets 18 from the rocket engines 15 control the flow of the airflows 16 introduced into the combustion chamber 20 in accordance with the flight speed. When the spacecraft 1 is stationary or in subsonic flight, the rocket jets 18 promote air intake into the combustion chamber 20 by lowering of static pressure due to expansion (ejector effect). In the subsonic flight condition, it performs the role of air compression, mixing with incoming air, fuel injection and ignition and during supersonic/ultra-supersonic flight it performs the role of a variable diffuser.

Abstract: The scroll compressor has a frame member 150, a fixed scroll member 110 and a circling scroll member 120 provided in an airtight container 100 and compresses a fluid by change in capacity of a compression space 130 comprised of the fixed scroll member and circling scroll member, where a movable auxiliary member 151 is provided by mounting it on a frame member between the frame member and the circling scroll member.

Abstract: A fluid compressor 1 comprises a rotation shaft 300 having a compression mechanism 2 and an oil passage 311, a motor 600, bearings 401 and 803, and a centrifugal pump part 900 for supplying oil through the oil passage 311. The rotation shaft 300 integrally comprises a main shaft portion 302, a crank pin 301 eccentrically provided to the main shaft portion 302, and a sub-bearing supported portion 303 having a smaller diameter than the main shaft portion 302. The oil passage 311 has a first oil passage 311a extending from a lower end of the sub-bearing supported portion 303 to a lower portion of the main shaft portion 302, and a second oil passage 311b that is communicated with the first oil passage 311a and extends to an upper end of the crank pin 301. The second oil passage 311b comprises a passage portion that has a smaller diameter than and is placed at an outer of the first oil passage 311a, a plurality of the second oil passages 311b are provided within a plain of said crank pin 311.

Abstract: A novel combined engine for a single-stage spacecraft is provided that combines a air-breathing engine utilizing oxygen in the atmosphere as oxidizer and rocket engines for obtaining thrust outside the atmosphere and that does not require a portion whose shape is variable in accordance with the flight speed. Rocket engines 15 are provided on struts 12 that form air introduction channels 10 in the air intake section 4. The rocket jets 18 from the rocket engines 15 control the flow of the airflows 16 introduced into the combustion chamber 20 in accordance with the flight speed. When the spacecraft 1 is stationary or in subsonic flight, the rocket jets 18 promote air intake into the combustion chamber 20 by lowering of static pressure due to expansion (ejector effect). In the subsonic flight condition, it performs the role of air compression, mixing with incoming air, fuel injection and ignition and during supersonic/ultra-supersonic flight it performs the role of a variable diffuser.

Abstract: A second frame is arranged between a first frame and an orbiting scroll, and a central space and an outer peripheral space are sealed off by a seal portion, which is formed between an end surface of a shaft support of the orbiting scroll and the second frame. Also, a balance weight is arranged in a space between an underside of the second frame and the first frame. Thereby, most of an oil having lubricated respective shaft supports flows into the space below the second frame, and the oil accumulated in the space is discharged through an oil scavenge pipe into an oil reservoir in a lower portion of a closed vessel. Also, since the balance weight can be assembled from a side of the orbiting scroll in a state, in which the second frame is removed, it is possible to mount the balance weight close to the orbiting scroll.

Abstract: The invention provides methods for synchronizing a plurality of data flows. In a first method, packets included in a plurality of data flows are sent out in the order of their generation times. A synchronization node adjusts the sending intervals of the packets such that they are the same as the generation intervals of the packets. In a second method, there are different synchronization nodes playing the different roles of sender-side synchronization node and receiver-side synchronization node. A receiver-side synchronization node receives a plurality of data flows from a sending device, and merges those packets in the data flows that have the same generation time into one packet. The merged packets are sent to a sender-side synchronization node, disassembled and restored to the original data flows. The restored data flows are sent by the sender-side synchronization node to their respective destinations.

Abstract: The invention provides a scroll type fluid machine in which a performance is improved by improving assembling accuracy and reliability is improved by giving strength to wraps. The scroll type fluid machine is provided with an orbiting scroll having an end plate and a wrap stood on the end plate, and a fixed scroll having an end plate and a wrap stood on the end plate and structured such that a motion within a surface perpendicular to an axial direction is restricted, thereby reducing or expanding a volume formed by engaging the wraps of the fixed scroll and the orbiting scroll with each other so as to close between both of the scrolls. In the scroll type fluid machine, a side surface clearance formed between both of the wraps is formed to be smaller in a range between a central winding start point of the wrap and a section close to a center of the wrap than in a range between the section close to the center of the wrap and a section close to an outer periphery of the wrap.

Abstract: A scroll type fluid machine which can practically exhibit an appropriate meshing condition between an orbiting scroll member and an unorbiting scroll member and which can enhance the energy efficiency.

Abstract: An axial piston machine comprises first and second members arranged so that one of the first and second members is swingable relative to the other to provide relative swinging motion, a plurality of pistons inserted in a plurality of cylinders formed in the second member, respectively, the pistons being mechanically engaged with the first member so that the relative swinging motion reciprocates the plurality of pistons in the cylinders, and a swinging mechanism for swinging the above-mentioned one of the first and second members relative to the other, and the axial piston machine is characterized in that the first and second members have spherical portions providing a coupling portion binding one of the first and second members to a spherical point of the other to be universally rotatable about the point, and the above-mentioned swinging mechanism comprises a relative revolving mechanism for revolving at least one of the first and second members relative to the other to provide a relative swinging motion betw

Abstract: A piston ring developed to prevent aluminum deposition and adhesion thereon is disclosed. The piston ring includes a ring-shaped piston ring main body including upper, lower, outer circumferential surfaces. An anti-abrasion surface treatment layer is formed on at least the lower surface of the main body, and a polybenzimidazole resin coating film including a solid lubricant, is formed on a surface of the anti-abrasion surface treatment layer.

Abstract: In a battery charger for an electric appliance powered by an incorporated rechargeable battery such as an electric shaver or electric toothbrush, etc., a charger circuit and charging terminals are incorporated in a casing. The charger circuit supplies a charger current to the rechargeable battery through the charging terminals. The interior of the casing is divided into lower circuit compartment for receiving the charger circuit and an upper terminal compartment by a partition carrying the charging terminals in such a manner as to make a water-tight seal between the circuit and terminal compartments. The charging terminals project into the terminal compartment, are electrically connected to the charger circuit, and also are accessible through individual holes formed in a portion of the casing for connection with the rechargeable battery.

Abstract: A method of producing a piston ring to be incorporated in an internal combustion engine includes first nitriding surfaces of a steel base material in a high temperature range and then continuously nitriding in a low temperature range. Finally a porous layer of at least a sliding surface is removed to expose a diffusion layer under the porous layer.

Abstract: A compression ring as a piston ring adapted to by received in an annular groove formed in a piston disposed in a cylinder assembly of an internal combustion engine includes an annular ring base member having a cutout portion, the ring base member having an outer sliding surface, upper and lower surfaces continuous to the sliding surface through corner portions and an inner peripheral surface to be fitted to the piston groove, the sliding surface contacting an inner wall of the cylinder when the piston reciprocates therein. A nitriding layer is formed on all the surfaces of the ring base member by a nitriding treatment. A white portion of the nitriding layer formed only on the sliding surface of the ring base member is substantially completely removed and white portions of the nitriding layer formed on the first and second surfaces and corner portions between the sliding surface and the upper and lower surfaces are removed so as to reduce thicknesses thereof to not more than 5 .mu.m.

Abstract: The object of the present invention is to provide a piston ring which is free from occurrence of cracks on the nitrided layer and having enhanced abrasion resistance and fatigue strength, and to provide a process for manufacturing the piston ring. In the invention, a surface of the steel body is subjected to a two-stage nitriding treatment consisting of low-temperature nitriding and high-temperature nitriding. A white layer on the slidable surface along the inner periphery surface of a cylinder is removed, and a white layer on each of the upper and lower surfaces and the corner portions each being adjacent to the slidable surface is removed to have a thickness of not more than 5 .mu.m.

Abstract: A piston ring provided with a nitriding layer at entire surfaces of the piston ring body to form a compound layer and a diffusion layer, so that a compound layer is formed over the diffusion layer. From an outer peripheral surface of the piston ring body, the compound layer or both compound layer and diffusion layers is removed, and the plating or spraying layer is formed on the exposed diffusion layer or the exposed surface of the piston ring body.

Abstract: A piston ring with a nitriding layer on entire surfaces thereof except an outer peripheral surface, and a plating or a spraying layer on the outer peripheral surface of the piston ring.