Abstract: Disclosed is a receptacle for use with a medical suction device which is equipped with a cover body and an external case for detachably holding and air-tightly surrounding the receptacle and a patient-side tube for introducing waste liquid into the receptacle, and designed to create a negative pressure in both an interior space of the cover body and the external case and an interior space of the receptacle so as to allow waste liquid to be sucked into the receptacle through the patient-side tube. The receptacle has an air-pervious/liquid-impervious element having air perviousness and liquid imperviousness. The air-pervious/liquid-impervious element at least partly constitutes a portion of the receptacle to be surrounded by the cover body and the external case.

Abstract: Disclosed is a medical liquid meter (10) for use with a medical liquid feeding device (30) including an expandable container (31), an inlet port (32) for supplying a medical liquid into the expandable container (31) therethrough, and a feed duct (33) for feeding to a patient the medical liquid discharged from one end of the expandable container (31). The medical liquid meter (10) comprises a weight-measuring mechanism (1). The weight of the medical liquid feeding device (30) is measured using the weight-measuring mechanism (1) so as to quantify a remaining amount of the medical liquid stored in the expandable container (31).

Abstract: Disclosed is a receptacle for use with a medical suction device which is equipped with a cover body and an external case for detachably holding and air-tightly surrounding the receptacle and a patient-side tube for introducing waste liquid into the receptacle, and designed to create a negative pressure in both an interior space of the cover body and the external case and an interior space of the receptacle so as to allow waste liquid to be sucked into the receptacle through the patient-side tube. The receptacle has an air-pervious/liquid-impervious element having air perviousness and liquid imperviousness. The air-pervious/liquid-impervious element at least partly constitutes a portion of the receptacle to be surrounded by the cover body and the external case.

Abstract: Disclosed is a medical liquid meter (10) for use with a medical liquid feeding device (30) including an expandable container (31), an inlet port (32) for supplying a medical liquid into the expandable container (31) therethrough, and a feed duct (33) for feeding to a patient the medical liquid discharged from one end of the expandable container (31). The medical liquid meter (10) comprises a weight-measuring mechanism (1). The weight of the medical liquid feeding device (30) is measured using the weight-measuring mechanism (1) so as to quantify a remaining amount of the medical liquid stored in the expandable container (31).

Abstract: A compact liquid discharge regulator is provided at low cost by arranging a channel spirally formed in the surface of a passage forming member. The surface of the passage forming member is brought into close contact with the inner surface of a housing part, and the channel functions as a liquid passage. In this construction, the sectional form and length of the channel can be formed at high precision in accordance with the design. Therefore, a desired pipe loss is obtainable only by designing in advance the sectional form and length of the channel so as to correspond to the pipe loss. Particularly, with injection molding, mass production of a passage forming member of identical pipe loss can be effected merely by preparing a mold corresponding to the pipe loss, thus leading to a considerable reduction in the manufacturing cost of the discharge regulator.

Abstract: A compact liquid discharge regulator is provided at low cost by arranging a channel spirally formed in the surf ace of a passage forming member. The surface of the passage forming member is brought into close contact with the inner surface of a housing part, and the channel functions as a liquid passage. In this construction, the sectional form and length of the channel can be formed at high precision in accordance with the design. Therefore, a desired pipe loss is obtainable only by designing in advance the sectional form and length of the channel so as to correspond to the pipe loss. Particularly, with injection molding, mass production of a passage forming member of identical pipe loss can be effected merely by preparing a mold corresponding to the pipe loss, thus leading to a considerable reduction in the manufacturing cost of the discharge regulator.

Abstract: A method of beneficiation of complex sulfide ores comprises crushing and grinding complex sulfide ore containing sulfides of copper, zinc, iron and other minerals, subjecting the ground ores to differential flotation to obtain a bulk copper-zinc concentrate which is separate from pyrite and gangue, and passing the bulk copper-zinc concentrate through a high-gradient magnetic separator having an open-bore magnetic field filled with a matrix element, so as to recover separately a magnetic copper concentrate and a non-magnetic zinc concentrate. By combining the differential flotation with high-gradient magnetic separation, the present invention enables individual separation of copper and zinc concentrates without using many reagents in high volumes and by a simple process control.

Abstract: A flotation process in which copper ores or copper converter slags are ground and firstly have added thereto benzotriazole or alkyl benzotriazole as an activator and secondly one or more collectors selected from the group consisting of xanthates, dithiophosphates, thiocarbamate esters, dithiocarbamates, mercaptans and dixanthogens and further, if desired, a promoter such as kerosene, light oil, bunker oil or petroleum lubricant is added to improve the recovery for the flotation of copper ores or copper smelter slags.