Abstract: A fluidic apparatus includes a pulley driven by an engine, torque limiting means disposed in the pulley and adapted to shut off the transmission of driving force transmitted by the pulley when overload is applied thereto, and a driving shaft driven by the torque limiting means. The torque limiting means includes a boss formed coaxially with the pulley, a collar disposed integrally and coaxially with the driving shaft, and a coiled spring adapted to hold outer peripheral surfaces of the boss and the collar by tightening with a predetermined tightening allowance. With the torque limiting means, if abnormal loads should be applied to the driving shaft, there hardly occur internal breakages, or the like, in the fluidic apparatus. In addition, because the torque limiting means has such a simple construction, the fluidic apparatus is down-sized and reduced in manufacturing cost.

Abstract: The toilet bowl drainage pump includes an elongate housing having a curved forward end from which a length of tubing extends and in which a plurality of openings are cut at a larger diameter of the curve. A motorized impeller is seated within one chamber in the housing into which the openings lead and out of which the tubing leads. A power source for the motor is provided in a second isolated chamber is selectively operable to energize the pump. In use, the tubing is fed through and over a drain trap of the toilet bowl as the forward end of the housing is seated along a bottommost surface of the bowl. The motor is then activated to pull water into the housing openings and eject the water throughout the tubing.

Abstract: A peristaltic pump assembly for easy loading includes a pump housing having a curved surface. A stationary tubing manifold from which a loop of tubing extends is positioned in line with the curved surface. A pump rotor rotatable about an axis is positioned adjacent to the curved surface. The rotor has a groove located above the curved surface encircling the rotor for retaining and stretching the loop of tubing in loading position between the rotor and the manifold. During loading, a notch located on the rotor progressively captures and urges the tubing downward between the curved surface and the pump rotor when the rotor is rotated.

Abstract: A bearing device for use in a canned motor includes a bearing housing detachably mounted on a motor frame of the canned motor, and a radial bearing supported by the bearing housing. A pair of axially spaced stationary thrust sliding surfaces is mounted on the bearing housing, and a pair of axially spaced rotating thrust sliding surfaces are mounted on the rotor in confronting relationship to the stationary thrust sliding surfaces, respectively. A resilient member such as an O-ring is interposed between the motor frame and the bearing housing for holding the bearing housing in radial position with respect to the motor frame.

Abstract: A pump for the hot chamber die casting of corrosive light alloys including a body (2) wherein a cavity (3) is formed in which a piston (4) vertically reciprocates and on whose side wall (5) an opening (11) for the introduction of the molten alloy (1) and the mouth of a sprue (9) for the connection with the mold (10) are formed. The diameter of the piston (4) is smaller than that of the cavity (3) so that it may move without rubbing on the wall (5) as it is guided by a seal packing (6) detachably constrained to the mouth of the cavity (3), the opening (11) being closed during the compression of the alloy in the cavity (3) by a valve (12) controlled from outside through a lever (13).

Abstract: A wall-mounted electronic potentiometer system is provided for controlling fluorescent lamps by way of ceiling mounted controllers. This enables control of the control information by way of a 2-wire communication bus to selected ceiling mounted controller using a serial data format.

Abstract: A peristaltic action pump filler includes a frame for supporting an elongate fill tube. A carriage member is mounted to the frame for reciprocating translation therealong. The carriage member includes a pair of pivotably mounted and oppositely disposed roller assemblies. The roller assemblies are interconnected to the carriage member such that, dependant upon the direction the carriage member is being translated, they are caused to pivot toward or away from the elongate fill tube which is supported therebetween. A valve mechanism is mounted to the support frame and coupled to fill the tube. The valve mechanism is interconnected to the carriage member so as to govern the amount of material discharged therefrom.

Abstract: In a pump for thick matter with delivery cylinders (1, 2), in particular a two-cylinder concrete pump, which in order to control the flow of thick matter, incorporates a distributing regulator (11) that is connected permanently at an outlet opening (8) with the pump-side end (9) of a delivery line (7) and which incorporates at least one inlet opening (12) where it is sealed on the web (29) between the thick-matter flow passage openings (16, 17) from the delivery cylinders into a supply tank (6), the thick-matter flow passage openings (16, 17) and the inlet opening (12) of the distributing regulator (11) being of identical outline and area, the distributing regulator (11) connecting adjacent thick matter flow passage openings (16, 17) alternately with the delivery line (7) and the supply tank (6) by a rotating movement, the present invention provides for the fact that the thick-matter flow passage openings (16, 17) together with their associated delivery cylinder openings (22, 23) are each connected through a

Abstract: A two-stage pump (9) for a continuous ink jet printing system comprises a first stage (A) which includes a chamber (91,92) having an inlet (93) and an outlet (94) via a non-return valve (115) to a channel (95). The first stage chamber (91,92) is divided by a dished diaphragm (101) movable by a first cylinder (97) mounted on a pump shaft (98). The pump (9) has a second stage (B) comprising a chamber (104,105) having an inlet (106) from the channel (95) and an outlet (107). The second stage chamber (104,105) is divided by a rolling diaphragm (116) movable by a second cylinder (108) mounted on a pump shaft (98). The cylinders (97,108) are arranged to be driven, and thus drive their respective diaphragms (101,116), 180.degree. out of phase so that ink and air enters the first stage chamber (91,92), is pressurised by the first cylinder (97) and passed through the channel (95) to the second stage chamber, and is further pressurised and passed out of the outlet (107) of the second stage chamber (104,105).

Abstract: A piston type compressor housing encloses a crank chamber, a suction chamber, and a discharge chamber. The compressor housing includes a cylinder block. A plurality of cylinder bores are formed in the cylinder block in which a plurality of pistons are slidably disposed within the cylinder bores and have a corresponding axis. The drive shaft is rotatably supported in the cylinder block. A slant plate having an angle of tilt is tiltably connected to the drive shaft. A bearing couples the slant plate to the pistons, so that the pistons may reciprocate within the cylinder bores upon rotation of the slant plate. The pistons are adapted to be reciprocally moved in cylinder bores in accordance with the tilting motion of the slant plate. The cylinder bores include a cross-sectional plan which is disclosed by a plane perpendicular to the drive shaft. The cross-sectional plan includes an outline which defines a simple closed curve which is composed of a plurality of curves having varying radii of curvature.

Abstract: In a swash-plate compressor, pistons are slidably received in cylinder bores. A drive shaft is extended through a crank chamber, and is rotated through an electromagnetic clutch means associated therewith. A conversion mechanism is provided on the shaft for converting a rotational movement of the shaft into a reciprocation of each piston in the corresponding cylinder bore such that a suction stroke and a discharge stroke are alternately executed therein. A fluid is introduced from a suction chamber into the bore during the suction stroke, and during the compression stroke, the fluid is compressed in and discharged from the bore into a discharge chamber. The conversion mechanism is constituted such that a stroke length is shortened in response to an increase of a pressure in the crank chamber, and vice versa. A first passage communicates the crank with the suction chamber, and a second passage communicates the crank chamber with the discharge chamber.

Abstract: A pump having a split driveshaft for use in pumping hazardous fluids wherein only one driveshaft becomes contaminated by the fluid while the second remains isolated from the fluid. The pump has a first portion and a second portion. The first portion contains a pump motor, the first driveshaft, a support pedestal, and vapor barriers and seals. The second portion contains a second, self-lubricating driveshaft and an impeller. The first and second driveshafts are connected together by a releasable coupling. A shield and a slinger deployed below the coupling prevent fluid from the second portion from reaching the first portion. In operation, only the second assembly comes into contact with the fluid being pumped, so the risk of contamination of the first portion by the hazardous fluid is reduced. The first assembly can be removed for repairs or routine maintenance by decoupling the first and second driveshafts and disconnecting the motor from the casing.

Abstract: A control assembly, for hydrostatic transmissions equipped with a pump and a valve element to control flow of hydraulic fluid to the pump, including a pump body member having a cavity with a movable valve element mounted in the body and connected to a source of pressurized hydraulic fluid and having a neutral position. A cover member is secured over the body member and a control shaft having interior and exterior ends extends therethrough. A manual control lever is mounted on the exterior end of the control shaft, and a cam plate with an elongated cam slot therein is secured to the interior end of the control shaft. Linkage, including an arm pivotally connected to the pump body and having a first upstanding pin thereon, interconnects the pump and the valve element. A second arm pivotally mounted on the first upstanding pin and a second upstanding pin mounted offset from the first upstanding pin on the second arm interconnects the control lever and valve element via control shaft and cam plate.

Abstract: A solution pumping system including a disposable pump cassette is disclosed, with the system configured for efficient and accurate preparation of parenteral admixture solutions. The system includes a pump driver having a reciprocable pump plunger and a plurality of associated valve actuators. The disposable pump cassette of the system is configured for removable positioning in operative association with the pump driver, and includes a positive displacement pump configured for operation by the reciprocable pump plunger. The pump cassette further includes a plurality of liquid inlets, and at least one liquid outlet joined in fluid communication with the inlets. By selective operation of the valve actuators of the pump driver, one or more selected source solutions are drawn through the pump inlets by the positive displacement pump, and directed through the pump outlet to an admixture solution container.

Abstract: An electric submersible pumping system uses a small diameter capillary tube and a high pressure injection pump. The tube size is selected so that the frictional flow resistance of the tubing at the desired flow volumes balances the pressure caused by the height difference in the columns of fluid. The flexibility of the system is expanded by tapering the capillary tubing string, preferably, but not necessarily, using a larger inner diameter tube above and a smaller inner diameter tube below. Using calculated lengths of different diameter tubing, the pressure loss due to flow can be adjusted to suit the anticipated well conditions. For example, for a flow rate of two gallons per day of oil, a 4,000 foot well might start with 1,500 feet of 0.069" inner diameter tubing at the top and 2,500 feet of 0.055" inner diameter tubing on the bottom. The high pressure injection pump assures that the surface pressure will never go negative, even if the well productivity or other conditions are unknown or changing.

Abstract: In a peristaltic pump comprising a pump tube with elastically deformable wall, which pump tube is arranged in a pump housing at the bottom thereof and is fitted into the pump housing with a portion which is curved in a part-circular configuration around a shaft of a rotor within the wall of the peristaltic pump and at a radial spacing relative thereto, the cross-section of the pump tube being partially varied during the conveying operation by at least one member of the rotor which presses the pump tube in respect of cross-section against a support means, with a reduction in the internal volume, the rotor is formed dish-like from a rotor end portion and a rotor wall and the latter is directed towards the bottom of the pump housing, the shaft of the rotor being fitted directly to the end portion thereof.

Abstract: A reciprocating piston fluid pump according to the present invention comprising: a pump driving section including a cam operated by an engine and a roller driven by the cam, the roller being provided at a lower end of a piston rod; a piston provided at an upper portion of the piston rod; a pump chamber housing the piston and divided into a piston upper chamber and a piston lower chamber by the piston, the pump chamber including a bearing opening at a central portion of the piston lower chamber, through which the piston rod extends; a rod seal retainer portion provided between the piston rod and the bearing opening of the pump chamber; a spring for urging the piston rod downwardly; oil passage means for communicating the pump upper chamber or the pump lower chamber with the bearing opening, the oil passage means being provided on an oil seal member or the piston rod; oil supply means for supplying lubricating oil to the pump driving section or the bearing opening; and at least one communication hole provided b

Abstract: An intake valve for use in a thermoplastic fluid pump for inflatable bladders in which the valve is composed of superposed elastomeric layers and one of which is energy sealed at the center thereof to an inner wall portion of the pump about an inlet opening through said layer. The inlet opening is axially aligned with a hole through said pump wall so that ambient air may upon an expansion stroke of the pump enter the valve through said inlet opening and hole in the pump wall. Thereafter when the pump is compressed, air within the pump chamber will seal the inlet opening and force said air into the bladder through a check valve provided therefor. Thereafter when the pump is released, air will again be drawn into the pump chamber through the intake valve.

Abstract: A swash plate type compressor with a variable displacement mechanism includes a compressor housing having a cylinder block provided with a plurality of cylinders and a crank chamber. A piston is slidably fitted within each of the cylinders and is reciprocated by a drive mechanism. The drive mechanism includes a drive shaft rotatably supported by the compressor housing, a pair of rotor plates fixed on the drive shaft and a swash plate having a surface with an adjustable tilt angle. The rotor plates are arranged on opposite sides of the swash plate. A plurality of slide contact coupling mechanisms extend between the swash plate and the rotor plate. The slide contact coupling mechanisms include two arms extending from opposite sides of the swash plate and a projection extending from one of the two rotor plates.

Abstract: An apparatus for pumping fluid at a substantially constant flow rate, is disclosed. The apparatus contains three transducers which couple one hydraulic fluid to another fluid while preventing contact with said other fluid. The apparatus also contains a timing device for continuously and sequentially withdrawing hydraulic fluid from the first fluid transducer while simultaneously pumping hydraulic fluid to the second fluid transducer, thereafter withdrawing hydraulic fluid from the second fluid transducer while simultaneously pumping hydraulic fluid to the third fluid transducer means, and thereafter withdrawing hydraulic fluid from the third fluid transducer. The timing means preferably includes a plurality of hydraulic cylinders and pistons, and a cam assembly.