Abstract: A scroll type compressor comprising: a fixed scroll and an orbiting scroll which have their base plates provided with wraps thereon, the wraps being combined to form a compression chamber therebetween; a frame for fixedly supporting the fixed scroll, the frame having a bearing at a central portion; a crankshaft supported by the frame bearing to be rotatable, and having an electric motor rotor to give torque to the orbiting scroll; a subframe having a central portion provided with a bearing for supporting a lower end of the crankshaft; a center shell having a terminal member and an electric motor stator, having an inner peripheral surface formed with a stepped portion to be engaged with a stepped portion formed on an outer peripheral surface of the frame, the center shell having the frame fixed thereto by shrinkage fit at a location above or below the stepped portion of the center shell, and also having the subframe fixed to a lower end thereof; and concentric assemblage jig mounting portions formed in the fra

Abstract: A scroll type fluid transferring machine comprises a stationary scroll having a wrap member, a movable scroll having a wrap member combined with the stationary scroll, a driving means for causing the movement of revolution of the movable scroll along a circular orbit so as to make the movable scroll line-contact with the stationary scroll whereby a closed space is produced between the stationary and movable scrolls, and an Oldham ring for maintaining the stationary and movable scrolls at predetermined positions while the movement of rotation of the both scrolls are prevented, wherein the Oldham ring is formed by injection-molding at least one thermoplastic resinous material selected from the group consisting of polyphenylene sulfide, polyetheretherketone, polyetherketone, wholly aromatic polyester, polysulfone, polyarylsulfone, polyethersulfone, polyetherimide, polyoxybenzyliden polyketonsulfide, polythioethersulfone and polyarylate.

Abstract: In a rotary compressor for compressing a refrigerant gas by a compressor element adapted to be rotated by an electric motor, the improvement comprises a cylindrical member provided inside or outside the closed container and communicated with the first intake passage and with the first discharge passage; a second intake passage communicated with the cylindrical member and with the compressor element; a second discharge passage communicated with the cylindrical member and within the closed container; a first communication passage for communicating the second intake passage with one end of the cylindrical member; a second communication passage for communicating the closed container with the other end of the cylindrical member; and a valve member provided in the cylindrical member; and a spring which urges the end of the valve near the first communication passage; the valve member being moved to a first position to communicate the first intake pasage with the second intake passage and also communicate the first d

Abstract: The discharge gas which has been compressed by the compressor main body is cooled by heat dissipation through the heat exchanger, after which it is again returned to the compressor. When the lubricant oil is sucked under pressure of the discharge gas, it is also cooled. Each and every component part of the compressor main body and the electric motor is cooled by causing the cooled discharge gas to pass there through, whereby the temperature rise in the compressor as a whole can be suppressed.

Abstract: A discharge valve for a refrigerant compressor includes a leaf spring 10 for biasing a flexible valve plate 9 which opens and closes a refrigerant discharge port 8. The leaf spring has a centrally deformed portion which engages an intermediate portion of the valve plate. During the initial opening of the discharge port, no spring force is applied to the free end 9a of the valve plate to thereby reduce any opening delay and increase the efficiency of the compressor.

Abstract: The lubricating oil pool 11 in the bottom of the shell 1 of a rolling piston refrigerant gas compressor is communicated directly with the space 16 inside the cylindrical piston 4 via a supply passage 10c in a side plate 10. Sufficient clearance is provided between the ends of the piston and the compressor side plates 9, 10 to enable limited communication between the space 16 and the compression and suction chambers 6, 18. The compressor discharge is supplied to the space 7 within the shell, and the resultant differential pressure applied to opposite ends of the supply passage causes a steady flow of oil into the piston interior to properly lubricate the moving parts of the compressor.

Abstract: The number of potentially rupturable brazed refrigerant tubing connections in a refrigeration system is reduced by crimping the check valve 14a directly within a tubing section 14b prior to its bending and assembly, either upstream or downstream of the accumulator/separator 16.

Abstract: The vane slot 20 and lubricating oil passageway 21 in the cylinder member 3 of a rotary vane compressor are configured such that the radial length of the slot wall 20a on the low pressure side of the vane 5 is less than that of the opposite wall 20b on the high pressure side. Such a shortened low pressure side slot wall reduces wear by providing improved lubrication at the critical inward edge of the slot (F1), and facilitates the flushing away of abrasive particles formed during the initial seating of the vane. For a horizontal installation the lubricating oil level is maintained below the radially outermost edge of the wall 20a to prevent the oil from being drawn into the low pressure chamber 17 when the compressor is stopped.

Abstract: A discharging valve device for a compressor discharges gas compressed in a compression chamber outside said chamber against an urging force of a discharging valve to a valve seat and resistance of breaking a film of a lubricating oil deposited at and near a cacting area formed between the valve seat and the discharging valve.

Abstract: A strainer device for a rotary type compressor includes a rolling piston which rotates with rotation of a rotational shaft, a cylinder plate provided in correspondence to the direction of the outer periphery of the rolling piston, a pair of side plates supporting the rotational shaft, and disposed on both side surfaces of the cylinder plate to define a compression chamber. A suction pipe passes through a shell housing with one end thereof being connected with a suction port formed in one of the side plates to introduce intake gas. A communication path leads the intake gas from the suction port to the compression chamber and a strainer removes foreign substances contained in the intake gas, the strainer being provided in a path formed in the cylinder plate or the side plate, not in the suction pipe, through which the intake gas flows.

Abstract: This invention relates to a curable resin composition suitable for use in the applications of casting material, coating material, putty, adhesives, various types of linings and FRP, said curable resin composition being characterized in that an unsaturated acrylic urethane prepared by addition reaction of a hydroxyl-terminated polymer, a polyisocyanate and a monohydroxylalkyl monoacrylate or a monohydroxylalkyl monomethacrylate, substantially free from an isocyanate group and having a weight-average extension of molecular chain of 100 A or more is added to at least one of an unsaturated polyester resin and an epoxy acrylate resin in an amount effective for the development of toughness, thus the toughness of the conventional unsaturated polyester or epoxyacrylate ester being improved by admixing said unsaturated acrylic urethane therewith.

Abstract: A mud gun for closing a tap hole of a vertical furnace, especially a blast furnace, is provided with a novel mechanism for traversing the gun barrel and pressing the muzzle of the barrel against the tap hole under high pressure.

Abstract: A device is disclosed for inserting a lance into a vertical furnace, especially a blast furnace, so as to sample gases and measure the temperatures or pressures thereof, thereby obtaining the accurate information of operating conditions in the furnace.

Abstract: The present invention discloses a furnace gas sampling device provided with a gate valve of the type in which a swingable valve disk is actuated to seal a lance insertion hole formed through the furnace wall when a lance is retracted away from the furnace and a mechanism for discharging dust and the like out of the valve box while the valve disk sealing the lance insertion hole.

Abstract: Disclosed is a clamping device for securely locking a turret of a mud gun in operative position where a gun barrel, which has been traversed and elevated to a blowing position, has its nozzle firmly pressed against a tap hole of a shell of a furnace to blow a mud projectile into the tap hole.