Abstract: Disclosed is a vacuum pump for vehicles which reduces noise of exhaust air generated during operation of the vacuum pump.

Abstract: A motor-driven compressor includes a housing, a rotary shaft, a compression mechanism and an electric motor. The housing includes a suction port and a discharge port. The compression mechanism is disposed in the housing and compresses refrigerant flowed through the suction port into the compression mechanism and discharges the refrigerant through the discharge port. The electric motor is disposed in the housing and drives the rotary shaft to rotate to drive the compression mechanism. The electric motor includes a rotor fixedly mounted on the rotary shaft and a stator fixed to the housing. The rotor includes a permanent magnet and a compressor interior environment improvement agent containing at least one of an absorbent for absorbing moisture and a neutralizer for neutralizing acid.

Abstract: A sealing is arranged between a rear head having an ejection port configured and arranged to eject compressed refrigerant and a rear muffler disposed so that a muffler space is formed between the rear muffler and the rear head. The rear head includes a main body having a bearing hole, an annular boss portion protruding from the main body and circumscribing the bearing hole, and an annular side wall protruding from the main body and circumscribing the boss portion. The rear muffler has an opening and is fastened to the end surface of the side wall so that the peripheral portion of the opening contacts the end surface of the boss portion. Preferably, the end surface of the boss portion has a part entirely further from the main body than the end surface of the side wall.

Abstract: A variable capacity vane pump has a plurality of vanes radially extendably installed in their respective slots that are arranged in a circumferential direction in a rotor, a cam ring rockably provided on a supporting surface in a pump body and forming a plurality of pump chambers at an inner circumference side of the cam ring in cooperation with the rotor and the vanes, and a seal member provided at an outer circumference side of the cam ring and defining a first hydraulic pressure chamber located at a side where a pump discharge amount increases and a second hydraulic pressure chamber located at a side where the pump discharge amount decreases in a space outside the outer circumference of the cam ring. A center of the cam ring is offset to an inlet port side from a center of a driving shaft.

Abstract: Systems and methods including a motor or electromagnets to control the movement of one or more pistons in a pumping chamber. The pumping chamber may include a pump inlet and a pump outlet in fluid communication with the pumping chamber. Surfaces on a piston or pumping chamber may include hydrodynamic bearing surfaces.

Abstract: The height measured from the bottom surfaces of support legs is set to be 2.5 or more times as great as the outer diameter of the compressor body, the height of the center of gravity measured from the bottom surfaces of the support legs to the center of gravity is set to be ½ or less the overall height, and the support legs are provided in number of four, based on the fulfillment of Rc/cos?<Rb<L. Here Rb is the support point radius of the compressor body, Rc is the outer radius of the compressor body, L is the distance from a longitudinal central axis of the compressor body to a longitudinal central axis of an accumulator, and ? is an angle half the angle formed between the adjacent support legs about the central axis.

Abstract: A motor-driven compressor includes a connector receiving portion provided on the outer surface of a housing. A wiring connection portion is provided in the connector receiving portion and supplies electricity from an external power source to a motor drive circuit. An insulating member provided inside the connector receiving portion insulates the wiring connection portion and the connector receiving portion from each other. An electrical wire is arranged between the inner surface of the connector receiving portion and the insulating member. The electric wire is used for a purpose other than supply of electricity to the motor drive circuit. A recess is formed in at least one of the inner surface of the connector receiving portion and the outer surface of the insulating member. The recess forms a wiring space, in which the electrical wire is arranged, between the connector receiving portion and the insulating member.

Abstract: A pumping-out apparatus provided herein is configured such that a follow plate is placed on a fluid surface of a stored fluid in a container, a suction port of a pump is attached to an attachment hole of the plate, and the stored fluid is pumped out by the pump. The pumping-out apparatus includes: the pump; a post on which the pump is fixedly provided; a lifted and lowered base on which the container is mounted and which is provided so as to be able to be lifted and lowered along the post; a tension spring configured to hang the lifted and lowered base and bias the lifted and lowered base in an upward direction to cause the fluid surface of the stored fluid in the container to press the plate; and a lifting and lowering operation portion configured to lift and lower an upper end portion of the spring.

Abstract: A stagnation space defined by barriers is provided in a first muffler chamber communicating with a first cylinder chamber. The stagnation space overlaps with a refrigerant-gas inlet side of the first cylinder chamber, the inlet side being bordered by a center plane as viewed in a direction of a center axis of the first cylinder chamber. In the first muffler chamber, the high-temperature, high-pressure refrigerant gas is unlikely to enter into the stagnation space, so that heat is less absorbed to the inlet side of the first cylinder chamber.

Abstract: A noise reducing device for a hermetic type compressor is provided that includes a plurality of cylinders disposed at upper and lower portions thereof, a communication path that provides for communication between inlets of the plurality of cylinders, and a suction pipe coupled to an inlet of one of the plurality of cylinders. Such an arrangement may reduce a number of components and simplify the fabrication process. Accordingly, fabrication costs may be reduced, and vibration due to resonation of a plurality of suction pipes may be avoided. Further, such an arrangement may provide enhanced performance by optimizing a specification of the suction pipe and a suction path thereof.

Abstract: A power driven component inside a compressor is disposed with a stator and rotors. The stator has an iron core in a circular ring and a plurality of stator coils in concentrated winding manner. An interval vertically passing through is formed between adjacent stator coils. A cover body is formed on the stator and a shield member that is formed with an upper portion along each stator coil and bending curve portions at two sides of the upper portion. Each bending curve portion is extended toward the interval from the upper portion. A sealed cover portion is connected between the bending curve portions of the upper portion and correspondingly seals each interval to reduce noise of the compressor and oil circle rate.

Abstract: A rotary vacuum pump comprises, between the rotor (2) and a driving motor, a control unit (1; 101) for operatively connecting the pump and the motor only in the periods in which the pump operation is required or desired.

Abstract: A hydraulic transport device for transporting a hydraulic medium. The device includes at least one externally toothed gear pump that is driven by an electric motor, and a control device attached to the pump. A passive rotational speed detection element is arranged in the pump and interacts with an active rotational speed detection element that is arranged in the control device to detect the rotational speed of the pump shaft.

Abstract: The invention relates to a vane cell pump (1) comprising an electrical drive unit with an electric motor and a motor shaft (6), a pump chamber (2) that connects to the electrical drive unit and has a pump ring (3), and also a rotor (4) that is arranged concentric to the motor shaft (6) within the pump chamber (2) and is in active connection with the motor shaft (6), wherein the rotor (4) has a number of guide slots (40) that extend inward from the outer circumference of the rotor and in each of which a vane (5) is arranged in a moveable manner with two vane ends (50, 51) opposite each other. The vane ends (50, 51) of each vane (5) have a mirror-symmetric design relative to the transverse center plane of the vane.

Abstract: A fuel pump for deployment in a fuel system for an internal combustion engine comprises a 3-phase brushless direct current motor, a sling vane impeller with blade-shaped sling vanes, sensorless electronic motor drive and an electronic controller. The controller is adapted to receive analog or pulse-width modulation inputs to control pump speed.

Abstract: The invention relates to a vane pump, comprising an electric drive unit having an electric motor and a motor shaft, a pump chamber, attached on the electric drive unit, a rotor having a plurality of blades, said rotor being arranged concentrically to the motor shaft within the pump chamber, wherein the motor shaft is engaged with the rotor by way of a tappet which is connected torsionally rigid with the motor shaft and the tappet comprises at least one tappet peg, which is engaged in a rotor recess that corresponds to the tappet peg, wherein the at least one rotor recess has an oval shape and the tappet peg is contoured in such a way that two first slightly curved contoured sections each form one contact area with one oblong planar section each of the rotor recess.

Abstract: The fixation arrangement of the present invention is applied to a compressor of the type which comprises a shell (1) inferiorly defining an oil sump (3) and housing: a crankshaft (4) journalled in a cylinder block (2) and carrying a rotor (6) formed by a stack of annular laminations; and an oil pump (10) comprising a tubular sleeve (20), which is superiorly mounted to the rotor (6) and inferiorly immersed in the oil sump (3), and a pump shaft (30). The fixation arrangement comprises at least one retention element (40) radially and axially locked around the tubular sleeve (20) and having a radially outer locking portion (41), which is seated and radially forced against a respective confronting circumferential extension (6c) defined between two consecutive annular laminations, in order to axially lock the tubular sleeve (20) to the rotor (6).

Abstract: The present invention relates to an electric compressor integrally including a compression mechanism and an electric motor, and an object thereof is to prevent the housing from being elongated in the axial direction and improve the sealability and the mountability of the compression mechanism. According to the present invention, a hermetic terminal (45) electrically connecting the electric motor (30) and a motor drive circuit (40) is attached within a swelled-space portion (50) swelled toward radial outside of a housing (11) so as to be continuous with a mounting bracket (17) of the housing (11). Accordingly, the distance between the compression mechanism and motor drive circuit can be shortened.

Abstract: A gear pump capable of alternately distributing a fluid in two distinct utilization circuits without the need for a switch. The gear pump (1) comprises two fluid outlet ports (5, 6) connected to two fluid utilization circuits and linked to the discharge chamber (C) of the pump via an integrated commutation (7). These commutation (7) comprise two distribution circuits (50, 60), located in a fixed support plate (70), and two buffer channels (30, 40), located in the rotary toothed wheels (3), arranged so as to alternately open and close the distribution circuits according to a commutation cycle that approximately corresponds to the rotation of the toothed wheels over half a revolution.

Abstract: The compressor of the invention includes a block (B) defining a shaft hub having a first and a second end portion and housing an eccentric shaft having a median portion radially journalled in the shaft hub, and a free end portion carrying the rotor of an electric motor. The first and the second end portions of the shaft hub define radial bearings for the shaft and a support member is formed by a coupling portion, affixed to the free end portion of the shaft, and by a mounting portion, projecting axially and radially from the coupling portion, externally to the shaft hub and around the median portion of the shaft. The rotor is affixed to the mounting portion, concentrically to the eccentric shaft and surrounding the shaft hub.

Abstract: FIG. 2 suggests an engine idea in which two interlocked rotors stop and turn in alternate fashion. If this suggestion is restructured as follows it would lead into the useful embodiments of this patent and more: The blades of a Front rotor are interlocked with the blades of a Back rotor. With the help of a Front motor and a Back motor, a computer is able to drive said Front rotor and said Back rotor. The computer controls the sealed chambers between the blades of the Front rotor and the blades of the Back rotor to bring about the strokes similar to the strokes of the conventional internal combustion engines. Said structure therefore yields to the formation of three embodiments: a Rotary Internal Combustion Engine (RICE), a Rotary Internal Combustion Generator, and a Rotary Compressor/Liquid Pump (RC/LP).

Abstract: A compression mechanism units include cylinder chambers into which a low-pressure gas is introduced, vanes contained in a vane groove, and a spring body that always causes compression operation in the cylinder chambers by providing an elastic force to a rear-end portion of one of the vanes, includes a pressure switching mechanism that switches to perform compression operation by guiding a high-pressure gas/not to perform the compression operation by guiding a low-pressure gas, is provided with a lubricating oil communication path communicatively connecting a oiling groove and a oil stagnant portion, and opposing the oiling groove to a portion other than the lubricating oil communication path when the vanes are in a top dead center position.

Abstract: This impeller-free vacuum cleaner is based on a rotary piston. Vacuum suction of 300 inches of water or better can be delivered. Quietness of below 70 db can be delivered. Tongued rotary piston assemblies may be strategically placed, such as stacked, to eliminate vacuum suction dead zones. Sealing problems that otherwise were encountered with previous reciprocating and rotary piston structures for vacuum cleaners are solved by using a tongued rotary piston with a double-notched rotary valve operating by a Geneva mechanism, and a novel pancake-shaped cylindrical structure to house the rotary piston. An inventive rotary combustion engine also is disclosed.

Abstract: A rotary vane compressor includes a cylinder chamber having an ellipsoidal inner wall shape, a rotor rotatably provided in the cylinder chamber, a vane held in the rotor so as to contact with an inner wall surface of the cylinder chamber along with a rotation of the rotor, a vane slot provided on the rotor and offset on a reverse rotational side of the rotor from a radial line passing over a rotational center of the rotor, and a controller for controlling a rotation of the rotor. The controller reversely rotates the rotor for a predetermined time upon activating the compressor. According to the compressor, chattering can be prevented by surely protruding the vane from the vane slot without providing extra parts. In addition, the vane can be produced with easy working processes at low cost.

Abstract: A variable displacement vane pump includes a rotor, a swingable annular cam ring receiving therein the rotor, a pump body encasing the cam ring and rotor, and a pressure plate which is disposed between an end wall of the pump body and the rotor and which includes a backup surface and a sliding surface formed with an inlet port, an outlet port and a backpressure groove. The vane pump further includes a seal member which is provided between the backup surface of the pressure plate and the end wall of the pump body, and which includes an inlet-side segment extending on the radial inner side of the inlet port and the radial outer side of the backpressure groove, and an outlet-side segment extending on the radial outer side of the outlet port.

Abstract: A compressor has stator of a motor is installed in a closed container, on two planes normal to the center axis 1a of the container. On each of the planes, the stator is welded to the container at three welding points. This mounting arrangement on two planes with three welding points on each plane minimizes the amount of movement of the stator in the direction of the center axis.

Abstract: A closed compressor provided for achieving a wobbling suppressing effect of a rotating shaft by a bearing frame portion and improving a reliability thereof by preventing a bearing frame portion from being deformed due to a gas load includes a bearing member provided between the one end in the axial direction of the closed container and the electric motor and includes a bearing portion pivotally supporting the rotating shaft and a bearing frame portion holding the bearing portion, and the bearing frame portion includes a high rigidity portion and a low rigidity portion in a circumferential direction and the bearing frame portion is arranged in the closed container such that a direction in which a load acting on the bearing portion becomes maximum coincides with a direction in which rigidity of the bearing frame portion is high.

Abstract: A compressor is provided that includes an accumulator formed in an internal space of a shell to reduce a size of the compressor. An accumulator space may be formed using the shell of the compressor, thereby simplifying an assembly process. A stationary shaft having a refrigerant suction passage may be directly connected to the accumulator to prevent leakage of refrigerant. A discharge passage may be formed in a rotating body to enhance a cooling effect of a drive motor, and an oil separating member may be installed in the discharge passage to prevent oil from being excessively leaked out. A center of gravity of the accumulator may correspond to a center of gravity of the compressor to reduce vibration noise of the compressor caused by the accumulator. An area for installing a compressor including the accumulator may be minimized to enhance design flexibility of an outdoor device.

Abstract: A compressor includes a closed container and a compression element that are welded together at least three welding points. The closed container has a suction port with a suction tube fitted to the suction port of the closed container with the suction tube being arranged and configured to suck a refrigerant gas, and the suction tube has a central axis that lies in a plane which is orthogonal to the central axis of the closed container and that passes through the suction port. The welding points are arranged such that straight lines connecting all combinations of any two of the welding points are neither parallel to the central axis of the suction tube nor perpendicular to the central axis of the suction tube, to reduce vibrations of the suction tube that occur when vibrations of the motor are transmitted to the closed container.

Abstract: Oil pump for hermetic refrigerating compressor comprising a tubular sleeve having an upper portion affixed to at least one of the parts of crankshaft and rotor, and a lower portion having a lower end immersed in the lubricant oil, said tubular sleeve being provided with an inner surface presenting, along at least part of its longitudinal extension, at least one helical groove upwardly extending from the lower end; and a pump body disposed inside the tubular sleeve and defining, with the adjacent helical groove of the tubular sleeve, a lubricant oil ascending channel, said pump body presenting a lower end portion mounted to one of the parts of shell, cylinder block and stator, so as to be freely displaced within the tubular sleeve, in radial directions orthogonal to the crankshaft and rotatively locked in relation to the rotor.

Abstract: An inverter-device built-in type electric compressor includes a compressor terminal and a direct-mounting connector, which connects the inverter-device to an external circuit, at an electric compressor side. The direct-mounting connector faces toward the electric compressor and is placed in parallel with a center axis of the electric compressor. A harness connector wired from a motor of the electric compressor is detachably and electrically connected to the compressor terminal, and the electric compressor is detachably and mechanically connected to the inverter-device.

Abstract: A vacuum pump has inside the pumping chamber valves intended to control the operation by opening and closing during the suction and delivery cycle of the pump. The valves or parts connected thereto are formed at least in part by a ferromagnetic material. A magnetic inductor is applied outside a wall, formed by a non ferromagnetic material, of the pumping chamber of the pump, and inside the pumping chamber are installed conducting elements of ferromagnetic material, for conducting magnetic flow produced, by the inductor, up to polar points close to the positions taken in the conditions of inactivity by the valves, so as to magnetically attract the valves (10,20) in an inactivity position when the inductor is operated, and thus stop the pneumatic operation of the pump without stopping its motion which then becomes idle.

Abstract: A supercharger for boosting intake manifold pressure in an internal combustion engine and producing electrical energy comprises an input shaft (3), a electric machine (50) including a stator (51) and a rotor (53), a compressor (70) including an impeller (71), and a planetary transmission (30) located between the input shaft (3) and the rotor (53) of the electric machine (50) and the impeller (71) of the compressor (70), all such that the input shaft 3 can drive both the impeller (71) and the rotor (53), or the rotor (53) and input shaft (3) can drive the impeller (71). The planetary transmission (30) includes an outer ring (31) operatively coupled to the input shaft (3), a sun member (39) operatively coupled to the impeller (71), planetary clusters (38) located between the outer ring (31) and sun member (39), and a carrier (37) operatively coupled to the planet clusters (38) and the rotor (53). Each planetary cluster (38) comprises an inner roller (35) and an outer roller (33).

Abstract: A motor-driven compressor has a compression mechanism, a rotary shaft, an electric motor, a motor drive circuit, a connecting terminal and a housing assembly. The compression mechanism, the electric motor, and the motor drive circuit are disposed along the axial direction of the rotary shaft in the housing assembly having first through third housings. The first housing is used for mounting the electric motor and the compression mechanism. The second housing has a terminal mounting portion for fixing the connecting terminal. The first and second housings have fastening portions at the radially peripheral portion thereof. The third housing is joined to the second housing to form an accommodation space for accommodating the motor drive circuit. The closed casing is formed by fastening the fastening portions of the first and second housings by means of a first bolt and connecting the second housing to the open end of the first housing.

Abstract: A compressor includes a closed container and a compression element welded together at least three, preferably six, welding points. A suction tube for sucking refrigerant gas is attached to the closed container. A first direction and a second direction that are associated with a natural vibration mode of the suction tube do not coincide with a direction in which any two of the welding points are aligned. Accordingly, vibration of the suction tube can be reduced by arrangement of the welding points even if vibration of a motor is transmitted to the compression element.

Abstract: An electric vane pump includes a first cover plate having a substantially planar first pump surface and a second cover plate coupled to the first cover plate defining a substantially planar second pump surface spaced apart from and extending substantially parallel to the first pump surface. A plurality of permanent magnets are fixed to a rotor. A plurality of radially moveable vanes are fixed for rotation with the rotor. Each vane is positioned between the first and second pump surfaces and has a first end slidably engaging the center vane support. An electric motor stator is positioned between the first and second cover plates and circumscribes the rotor. A resilient member biases each of the vanes into engagement with the center vane support.

Abstract: A method of installing or retrieving a pumping system into or from a live wellbore includes connecting a lubricator to a production tree of the live wellbore and raising or lowering one or more downhole components of the pumping system from or into the wellbore using the lubricator.

Abstract: Between an exhaust chamber and a lubrication chamber, a second seal that seals between a cylinder that partitions the exhaust chamber and a first shaft and a first seal that seals between a side cover that partitions the lubrication chamber and the first shaft are provided. A gas introduction space to which a seal gas is supplied is provided between the second seal 2 and the first seal. The second seal and the first seal each have a base part and a pair of ring-like lips extending from the base part toward the first shaft. The pair of lips extends such that the distance therebetween is gradually increased from the base part toward the first shaft, and the tips of the pair of lips can be brought into elastic contact with the first shaft.

Abstract: A positive displacement rotary system may include a main rotor and a slotted rotor. The main rotor can include an interior cavity and a fixed vane (or blade) that is attached to the peripheral and side walls of that cavity. The slotted rotor is positioned within the main rotor interior and includes a slot for the main rotor blade. The main and slotted rotors rotate about parallel axes that are offset from one another. As the rotors turn, separate chambers are formed between the blade and an inter-rotor seal, with the inter-rotor seal located at or near a rolling contact between the outer surface of the slotted rotor and an inner perimeter wall of the main rotor cavity. The separate chambers contract and expand as the rotors rotate.

Abstract: A variable capacity rotary compressor is provided, in which a vane may be restricted by a pressure difference generated between both side surfaces of the vane when the compressor performs in a saving driving mode. The vane may be restricted quickly and stably by rapidly decreasing a pressure of a vane chamber by leaking a discharge pressure of the vane chamber to an inlet via a low pressure passage and thereby increasing a pressurizing force applied to a side surface of the vane relatively greater than a supporting force applied to a rear surface thereof. In this way, the vane may be prevented from being vibrated due to a weak restriction force of the vane when a power driving mode of the compressor is switched into the saving driving mode, which prevents noise from increasing due to design conditions, thereby enhancing a comfort feeling of a user.

Abstract: A capacity variable type twin rotary compressor may include a casing, a motor, a first cylinder having a first compression space, a second cylinder fixed to one side of the first cylinder and having a second compression space, first and second intakes respectively formed in the first and second cylinders and each connected to a gas intake pipe, first and second vane slits respectively formed in the first and second intakes first and second rolling pistons eccentrically coupled to the motor and respectively housed in the first and second compression spaces, first and second vanes slidingly received in the first and second vane slits, respectively, an expansion groove formed at the second vane slit separate from the inner space of the casing, and refrigerant switching valves that allow refrigerant of intake and discharge pressures to be supplied into the second compression space and the expansion groove, such that the second vane contacts the second rolling piston to perform a power driving or separates therefr

Abstract: A hermetic compressor is disposed with an annular motor stator, a motor rotor, a casing and plural spot joining portions. The motor rotor is disposed such that it may freely rotate in a space inside the motor stator. The casing includes a cylindrical portion. The cylindrical portion houses the motor stator and the motor rotor. The plural spot joining portions fix the motor stator to the cylindrical portion by spot joining in a state where a clearance is secured between the motor stator and the cylindrical portion.

Abstract: Lifetime required of mobile-use fuel cells is secured and prolonged, stabilized pump performance is maintained by preventing bearing seizure and abnormal wear. The shaft (101) of a pump mechanism section (100) and the shaft (201) of a motor section (200) are integrated, and the shafts (101, 201) are supported by two or more ball bearings disposed in the pump mechanism section (100), thereby making it possible to fill grease in the closed spaces of the ball bearings (300), and secure a sufficient lifetime basically with almost no possibility of the grease leaking out, even if it is used at a relatively high environmental temperature.

Abstract: The subject invention pertains to a method and apparatus for cooling. In a specific embodiment, the subject invention relates to a lightweight, compact, reliable, and efficient cooling system. The subject system can provide heat stress relief to individuals operating under, for example, hazardous conditions, or in elevated temperatures, while wearing protective clothing. The subject invention also relates to a condenser for transferring heat from a refrigerant to an external fluid in thermal contact with the condenser. The subject condenser can have a heat transfer surface and can be designed for an external fluid, such as air, to flow across the heat transfer surface and allow the transfer of heat from heat transfer surface to the external fluid. In a specific embodiment, the flow of the external fluid is parallel to the heat transfer surface.

Abstract: A compressor includes a compression mechanism, a motor coupled to the compression mechanism via a driving shaft, and a casing to accommodate the compression mechanism and the motor. The motor includes a stator, and a rotor disposed inside the stator and coupled to the driving shaft. The stator is spot-joined to the casing via a plurality of stator spot-joined portions at different positions along a circumferential direction about the driving shaft. Preferably, the stator spot-joined portions are disposed at different axial positions. Also, the stator spot-joined portions are preferably disposed at different circumferential positions from positions of compression mechanism-side spot-joined portions. When an accumulator is connected to the casing via a connection pipe, a straight line between any two of the plurality of stator spot-joined portions preferably crosses a vibration direction of a natural vibration mode of the accumulator.

Abstract: Compressors are defined by two relatively moving members, which have a relative orbital movement between the two. Piezoelectric elements are associated with each of the two moving members to cause the moving members to result in the orbital movement.

Abstract: There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to fit into a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion.

Abstract: An electric pump includes a pump; a motor having a motor shaft, the motor shaft being connected to the pump to drive the pump; a support member which is arranged between the pump and a front end portion of the motor, the front end portion of the motor being a motor shaft side, the support member supporting the pump and the motor when the motor shaft penetrates the pump; a motor cover which covers the motor, the motor cover having a closed-end cylindrical shape, and an opened end side of the motor cover being fixed to the support member; and an elastic member which is in a state of being compressed positioned between a rear end portion of the motor and a bottom portion of the motor cover. The motor is supported by the support member as being urged thereto by the elastic member.

Abstract: A Concrete Pump is a mechanical device compromising of round funnel shape hoper, Pump outlet, rotating pressure and wear plates, to which are attached rotating pump cylinders, opposite rotating wear plate and press against it is stationary wear plate to which is attached hoper's outlet and pump's outlet flange. Pump functioning as follow; Concrete from hoper passing through stationary and rotating wear plates into one pump cylinder, in same time concrete from other cylinder (previously field with concrete) is been pushed through rotating wear plate and through stationary wear plate into pump's outlet. When pistons reach the end of cylinders the rotating wear plates and concrete cylinders rotate by 180 degrees and process is repeated again. Pump is designated so as to entire volume of concrete or simular pumping substance is pumped out of the hoper.

Abstract: A valve guard for restricting the amount of deformation of a valve disc has a main body part abuttable with the back surface of the valve disc, and a fixation part extending to outside of a receding part. Upon mounting the valve guard to an end plate part, the fixation part is firmly attached to the outside of the receding part of the end plate part.