Abstract: Several transmission embodiments selectively communicate rotary drive to an orbiting scroll to achieve capacity modulation. In these embodiments, when the motor is driven in a first direction, the orbiting scroll is driven at a rate which is equal to the motor speed. However, if the motor is driven in a reverse direction, the orbit rate of the orbiting scroll is reduced. The transmission ensures that the orbiting scroll member itself is driven in the proper forward direction regardless of whether the motor is being driven in forward or reverse.

Abstract: In a variable displacement pump, a pressurizing cylinder is provided in an opposite side of the first fluid pressure chamber, holding the cam ring there between, and a piston inserted to the pressurizing cylinder collides with the cam ring. A pressure in an upstream side of both throttle passages comprising the variable throttle passage and the fixed throttle passage provided in the pump discharge side passage is introduced to the first fluid pressure chamber and the oil chamber of the pressurizing cylinder, and a pressure in a downstream side of the both throttle passages is introduced to the second fluid pressure chamber.

Abstract: A semiautomatic electronic system for sensing and accordingly raising if such is determined to be required, the fluid level of a liquid present in swimming pools, animal water drinking troughs, or any other liquid containment vessels. For the accomplishment of this task an electronic circuit periodically, in accordance with a schedule prescribe by a user, samples the environment of the space in a liquid containment vessel to determine if a liquid level has fallen below a predetermine level prescribed by the user. If such is the case, either a pump or a solenoid valve can be automatically activated, so as to cause liquid to be added to the containment vessel, only until the liquid in the containment vessel is restored to the required predetermined level.

Abstract: There is disclosed a pump and pumping system for pumping dense phase gases, specifically for injecting carbon dioxide into an oil or gas reservoir that includes a pump, a motor, and a casing in which the pump and motor reside. There is also disclosed a pump and pumping system for injecting dense phase greenhouse gases into a reservoir or underwater. The pump may include a downhole electric submersible pump. A method of controlling the pump and pumping system is also described involving the use of a variable speed drive in conjunction with an on-line gas chromatograph to maintain a constant carbon dioxide injection rate.

Abstract: A single-headed piston (22) is accommodated within each of a plurality of cylinder bores (13) formed on a cylinder block (13). Shoes (23) are disposed between a swash plate (11) and each single-headed piston (22). The rotation force of the swash plate (11) is transmitted to the single-headed piston (22) via the shoes (23). Each single-headed piston (22) makes a reciprocating motion within the cylinder bore (131) accompanied by the rotation of the swash plate (11). A rotary shaft (16) fixed to the swash plate (11) is driven by a motor (21).

Abstract: The reliability of a compressor may be improved by affixing an inertia-increasing member to the drive shaft of the compressor in order to reduce the forces imposed on a mechanical coupling between the drive shaft and a compression member when the rotation of the drive shaft is initiated. A method of selecting the size and configuration of the inertia-increasing member is also provided.

Abstract: This invention is directed to a locomotive air compressor that includes a detachable bearing housing that houses an outboard crankshaft bearing. The bearing housing includes a flange, a tapered housing and a bearing retainer. The housing also includes a central bore to allow for the passage of a crankshaft and an annular recess which supports the outboard crankshaft bearing. The addition of an outboard crankshaft support bearing allows the placement of the bearing closer to the electric motor, eliminating deflections that are inherent with extended, unsupported crankshafts. The elimination of crankshaft deflections allows the use of more efficient electric motors that have a smaller air gap between the rotor and the stator. The bearing housing is detachable to allow access to the bearings in the crankcase for easy servicing.

Abstract: A magnetic pump having an internal magnet that is caused to rotate from outside its housing in order to cause rotation of the impeller. In a magnetic coupling structure in which an inner magnet disposed on an impeller is accommodated in a cylindrical accommodating portion of the housing, the outer circumferential surface of this accommodating portion is loosely inserted into the inner circumferential surface of a cylindrical outer magnet which is supported on its outer circumferential surface by a magnet cup body, and which rotates together with this magnet cup body, and the impeller rotates in accordance with the rotation of the outer magnet, and a cylindrical covering member which covers the inner circumferential surface of the abovementioned outer magnet is mounted on the outer magnet.

Abstract: A linear pump for pumping a fluid includes a generally tubular shaped bladder 50 sealingly engaged on each end to an end cap 20, 25, forming an inner chamber 14, and including each of an inlet 70 and an outlet 75 inner chamber check valve to fluidly interconnect the inner chamber with the fluid. Each of a plurality of linear motors 40 each may be connected on one end to a respective support rib 30 and on an opposing end pivotally connected to one of the end caps. The support ribs are flexible and have a central portion of the rib engaged with a central portion of the bladder. The plurality of linear motors may be selectively actuated to cause the plurality of support ribs to alternately flex and/or straighten out such that the bladder is condensed or expanded respectively to effect a change in volume of the inner chamber, thereby drawing in or displacing fluid. Bladder extensions 160 may be used to slidably connect the bladder to a respective rib.

Abstract: An unloader system is provided for a reciprocating gas compressor. The system includes an unloader valve assembly including a valve member controlling flow between compressor cylinder and a clearance bottle. Opening and closing of the valve member is controlled by manipulating a control pressure acting through a manifold against the stem of the valve member by means of a pressure regulator connected in series with a pressure source. When the pressure in the compressor cylinder acting on the heads of the poppet valve members exceeds the control pressure acting on the stems, the poppet valve members open, partially unloading the compressor.

Abstract: The invention disclosed is a compact, high efficiency, smart material element driven hydraulic pump comprising a diaphragm, a face plate coupled to and spanning across the diaphragm, and a smart material element. The diaphragm comprises on a first side a recess and a stiff face-seal surface surrounding the recess. On the second side of the diaphragm is a stiff center pedestal and a flexure means attached to the periphery of the center pedestal. The diaphragm and face plate coupled together form a chamber that is dynamically sealed by contact of the face-seal surface against the face plate and such chamber's compliance is primarily and effectively within the flexure means within the diaphragm. A smart material element is positioned and constrained against the stiff center pedestal such that extension and contraction of the smart material element deforms the diaphragm such that the pumping chamber compresses and expands through compliance and deformation within the flexure means alone.

Abstract: A hand pump includes a head, a cylinder, a piston rod, a first handle, and a second handle. The head includes a valve-engaging portion for engaging with a valve of an article to be inflated. A first end of the cylinder is connected to the head. A piston is securely mounted to a first end of the piston rod for reciprocation in the cylinder. The first handle is securely attached to a second end of the piston rod that extends beyond a second end of the cylinder. The second handle is attached to the head to provide an auxiliary grip.

Abstract: This invention is directed to a locomotive air compressor that includes a detachable bearing housing that houses an outboard crankshaft bearing. The bearing housing includes a flange, a tapered housing and a bearing retainer. The housing also includes a central bore to allow for the passage of a crankshaft and an annular recess which supports the outboard crankshaft bearing. The addition of an outboard crankshaft support bearing allows the placement of the bearing closer to the electric motor, eliminating deflections that are inherent with extended, unsupported crankshafts. The elimination of crankshaft deflections allows the use of more efficient electric motors that have a smaller air gap between the rotor and the stator. The bearing housing is detachable to allow access to the bearings in the crankcase for easy servicing.

Abstract: In a tube pump, a rotor is fixed to a drive shaft so as to rotate therewith. A tube pressing member is swingable in an axial direction of the drive shaft. A swinging member swings the tube pressing member in accordance with the rotation of the rotor. An upper outer face of a tube is fixed to a lower portion of the tube pressing member. A lower outer face of the tube is fixed to a fixing member. The tube is forcibly pressed and expanded in accordance with the swing motion of the tube pressing member, while the pressed/expanded part is shifted in an extending direction.

Abstract: A vacuum pump comprises a pump case having an interior space, a rotor disposed in the interior space of the pump case, and a thread stator disposed in the interior space of the pump case and opposite to an outer peripheral surface of the rotor. At least one heater is arranged in the thread stator for heating the interior space of the pump case. An output device outputs a parameter constituting a factor for determining a temperature of the rotor. A memory stores a database containing information corresponding to a relationship between the parameter output by the output device and a preselected temperature of the heater. A controller inputs the parameter output by the output device and selects from the database stored in the memory the preselected temperature of the heater in accordance with the input parameter.

Abstract: In a closed type motor-operated compressor, oil covers are provided at the upper and lower portions of a stator, as well as a porous filter provided between the lower portion coil cover and a support member for supporting a sub-bearing, wherein it is so constructed that gas discharged passes through the filter with certainty after passing through a space defined by an inner diameter of a sealed container and a constituent element(s) of a compressor mechanism, thereby dissolving a problem of decreasing heat change efficiency in a refrigerating cycle due to much of discharge of refrigerating machine oil from a discharge pipe to the refrigerating cycle.

Abstract: There is provided a screw compressor which needs neither a bed nor a coupling, therefore not involving alignment, and yet in which gas is not heated by the motor. The screw compressor has a compression section 21 and a motor section 22 inside a casing 20. Both a rotor 27 of a motor 23 and a screw 26 of the compression section 21 are fixed to one main shaft 25. The main shaft 25 is supported at three points by a total of three bearings of both-end rolling bearings 31, 32 and a central rolling bearing 33. A refrigerant passage 45 passes only through the compression section 21 and not through the motor section 22.

Abstract: The invention relates to a process for conveying damp gases by means of a conveyor device (1) and also relates to a conveyor device (1) for carrying out the process. The conveyor device (1) has at least one feed pump (2) with an oscillating reciprocating piston (3) in a delivery chamber (7). In order to dry the conveyor device (1) effectively in the region of the delivery chamber (7), the delivery chamber (7) of at least one feed pump (2) is intermittently ventilated at various intervals in time using an ventilation device (15) while the conveyor device (1) is in operation.

Abstract: Apparatus for filtering spa water includes a therapy pump and a circulation pump. A filter of unitary construction includes a surface loading filter element for filtering water passing through the therapy pump and a depth loading filter element for filtering water passing through the circulation pump. A connector releasably interconnects the two filter elements.

Abstract: A double-acting reciprocating motor with a uni-directional fluid flow path comprises a piston disposed within a cylinder. Within the cylinder, the piston defines a first chamber between the piston and a cylinder base and a second chamber between the piston and a cylinder head. Fluid is introduced into the first chamber of the motor through an inlet port associated with the cylinder base. A pass-through valve controls the flow of fluid from the first chamber to the second chamber. An outlet valve regulates the draining of fluid from the second chamber through an outlet port associated with the cylinder head. Fluid pressure within the first chamber urges the piston towards the cylinder head when the pass-through valve is closed and the outlet valve is open. The piston surface facing the second chamber is larger than the piston surface facing the first chamber, so the piston moves towards the cylinder base when the pass-through valve is open and the outlet valve is closed.