Abstract: A medical gripping device includes a housing, a gripping mechanism at one end of the housing, an operation unit, and a reaction force actuator and a gripping actuator installed in the housing. The operation unit is operated by a gripping operation of an operator, and the reaction force actuator applies an operation reaction force to the operation unit. The gripping actuator causes the gripping mechanism to perform a gripping operation. A control unit controls a force and a position that are output by the gripping actuator in an operation of the gripping mechanism in accordance with an operation with respect to the operation unit, and controls a force and a position that are output by the reaction force actuator in an operation of applying the operation reaction force to the operation unit in accordance with a reaction from a gripped object with respect to the gripping mechanism.

Abstract: A process and an apparatus for efficiently recovering magnesium ammonium phosphate (MAP) crystals of high purity and good quality in the technique of removing phosphorus and the like as MAP crystals from wastewater containing high concentration organic substance, phosphorus and nitrogen such as a digested supernatant liquor of human waste sewage and septic tank sludge, a digested liquor of sludge, chemical plant wastewater, and simultaneously recovering the MAP crystals.

Abstract: The present invention has an object to provide a process and an apparatus for efficiently recovering magnesium ammonium phosphate (hereinafter referred to as “MAP”) crystals of high purity and good quality in the technique of removing phosphorus and the like as MAP crystals from wastewater containing high concentration organic substance, phosphorus and nitrogen such as a digested supernatant liquor of human waste sewage and septic tank sludge, a digested liquor of sludge, chemical plant wastewater, and simultaneously recovering the MAP crystals.

Abstract: A compressor includes a cylinder block and a housing connected to the ends of the cylinder block. A suction chamber and a discharge chamber are defined in the housing, respectively, and the chambers are divided by a bulkhead, or wall. A valve plate, which has a discharge port for connecting the cylinder bores with the discharge chamber, is positioned between the cylinder block and the housing. A discharge valve is provided for selectively opening and closing the discharge port. A gasket is positioned between the housing and the valve plate, and the gasket is held to the bulkhead. The gasket has a bulkhead seal portion, which is between the bulkhead and the valve plate for sealing between the discharge chamber and the suction chamber, and a protruding portion, which protrudes radially beyond the bulkhead, extending along and contacting the valve plate.

Abstract: It is an object of the present invention to reduce the abrasion at a pressure receiving portion of the cylinder block, without increasing the manufacturing cost, even when the outer rings of a bearing are jointly rotated and eccentrically fluctuated. The cylinder blocks are made of aluminum alloy comprising, by weight, 1.5 to 3.5% of Cu, 13 to 16% of Si, 0.5% or less of Mg, 1.0% or less of Zn, 1.0% or less of Fe and the remainder of Al. The matrix, except for primary Si crystal, is relatively soft. Primary Si crystals which each independently project from the pressure receiving portions tend to be pushed into the base material by the outer rings of the thrust bearings, so that the levels of primary Si crystals are easily made to be approximately uniform.

Abstract: It is an object of the present invention to secure excellent slidability between a piston and cylinder bore even under severe running conditions.Cylinder blocks are made of aluminum alloy comprising, by weight, 1.5 to 5.0% of Cu, 13 to 16% of Si, 0.5% or less of Mg, 1.0% or less of Zn, 1.0% or less of Fe, and the remainder of Al, and exfoliated recessions of primary Si crystal exist on the inner surface of a cylinder bore. The large number of minute exfoliated recessions function as oil reservoir spots.

Abstract: A refrigerant compressor of the type in which a cylinder block and front and rear housings made of an aluminum alloy are fastened together by means of a plurality of bolts made of a ferrous metal and extending through part of the refrigerant gas passage in the compressor and respective bores formed in the front housing, is disclosed. Each of the bolts has a head supported on a bearing surface formed on said housing means, the bearing surface being formed by an annular projection concentric with the bore in the housing. The annular projection is plastically deformed by the bolt when the compressor is assembled, and the bolt head is carried by such deformed annular projection so that an increase in the tightening force is taken up by the elasticity of the projection.