Abstract: The present disclosure relates to a compressor including a case, a compression unit provided inside the case, and a driving unit, wherein the compression unit includes a cylinder having a compression space, a piston reciprocating inside the cylinder, a discharge cover covering the compression space, a first plenum disposed inside the discharge cover and having a discharge space and a coupling space, a second plenum disposed inside the discharge cover and defining a movement channel through which refrigerant moves, a rib disposed in the movement channel, and a communicating portion through which the discharge space and the movement channel communicate with each other, wherein the refrigerant discharged from the compression space moves along the discharge space, the communicating portion, and the movement channel, whereby pulsation caused by the discharge of the refrigerant can be reduced.

Abstract: An air compressor contains a piston actuated by a motor to move in a cylinder. The piston includes an air stop sheet mounted on a top support plate thereof. The air stop sheet includes a bending section having a positioning zone and an acting zone located opposite to the positioning zone and configured to cover an air channel of the piston. The bending section is a boundary axis of the acting area and the positioning zone of the air stop sheet so that a top of the air stop sheet facing the cylinder forms an obtuse angle less than 180 degrees, and a back surface of the acting zone of the air stop sheet backing a top of the cylinder turns on relative to a plane of a top of the top support plate at an open angle ?, thus producing an air flowing space.

Abstract: A vacuum pump suitable for mounting to an engine includes: a casing having a cavity, the cavity including an inlet and an outlet; a moveable member arranged for rotation inside the cavity, the movable member being movable to draw fluid into the cavity through the inlet and out of the cavity through the outlet so as to induce a reduction in pressure at the inlet; a valve seat at the outlet; and an outlet valve including a reed element and a stop for restricting movement of the reed element. The stop is movable between a first operating position, in which movement of the reed element is restricted to a first opening degree, and a second start-up position, in which movement of the reed element is restricted to a second opening degree, which is larger than the first opening degree.

Abstract: Disclosed herein is a muffler of a linear compressor. In the present invention, a center of an entry pipe of the muffler is in line with that of an inhale port of a piston. Therefore, a flow loss occurred when fluid is inhaled into the inhale port from the entry pipe can be reduced, and inhale efficiency can be improved. Furthermore, the plurality of inhale ports is eccentrically disposed in a front of the piston, and each center of the plurality of entry pipes is formed to be in line with that of the inhale ports. Not only the center but also the number of the inhale port and the entry pipe are agreed, on this account, the flow loss can be decreased and the inhale volume can be increased.

Abstract: An air compressor includes a supporting base having an arm extended from a plate, and a cylinder housing formed integral with the arm and the plate and having an outlet tube. The cylinder housing includes three or more ducts extended outwardly from the outlet tube and communicating with the outlet tube, for attaching a pressure gauge, a nozzle or other devices. A piston is slidably received in the cylinder housing. A motor is attached to the plate, and includes a spindle extendible through either the lower or the upper portion of the plate, and coupled to the piston with an eccentric member, to move the piston to the cylinder housing in a reciprocating action, in order to generate pressurized air.

Abstract: An air pulse discharging device for a noncontact type tonometer, which includes: a cylinder; a piston arranged reciprocatably in the cylinder and which compresses air in a compression space; a nozzle which discharges the compressed air to an examined eye; at least one opening provided on the piston and which communicates the compression space with a cylinder atmospheric-air releasing chamber; and a valve disk provided to the piston and which opens and closes the at least one opening, the valve disk closes the at least one opening based on a differential pressure between the compression space and the cylinder atmospheric-air releasing chamber when the piston is driven to a direction of compressing the air in the compression space, and opens the at least one opening based on the differential pressure when the piston is driven to a direction opposite to the direction of compressing the air in the compression space.

Abstract: A suction valve for reciprocating compressor includes a fixation part, which receives a driving force of a reciprocating motor, and is fixed-combined to the front end surface of a piston performing linear reciprocal movement in the cylinder, a switching part for switching a hollow channel formed to penetrate the piston having a certain area, and a plurality of arms for connecting the switching part and the fixation part to make the switching unit behave in a certain displacement section having the fixation part as a fixed point. Receiving driving force of the reciprocating motor, the piston is bent and straighten by the pressure difference, and stress is distributed evenly in the above process, and minimizing bulking phenomenon to prevent damage of a switching part. Also, the responsiveness of the valve can be improved.

Abstract: Disclosed herein is a linear compressor. In the present invention, a spring sheet is equipped in an exhale cover to prevent an edge and an outer circumference of an exhale spring from touching with the exhale cover. A surface of the spring sheet is treated with a metal of the high hardness, thereby protecting against its abrasion and transformation, caused by a repetitive load from the exhale spring. Furthermore, the durability is improved by enduring the excessive or local load from the exhale spring.

Abstract: Digital fluid pumps having first and second electromagnetic actuators formed in part by a piston to alternately drive the piston in opposite directions for pumping purposes. The piston motion is intentionally limited so that the electromagnetic actuators may operate with a high flux density to provide an output pressure higher than that obtained with conventional solenoid actuated pumps. The electromagnetic actuator coils are electrically pulsed for each pumping cycle as required to maintain the desired fluid flow and output pressure, with the piston being magnetically latchable at one or both extreme positions between pulses. Alternate embodiments and control methods and systems are disclosed.

Abstract: A linear compressor for multi-compression includes a stationary cylinder, a moving piston, and a stationary piston. The stationary cylinder has a first compression chamber formed therein. The stationary cylinder is provided at one side thereof with an outlet part. The moving piston is movable forward and backward by a linear motor, that compresses a fluid in the first compression chamber. The moving piston has a second compression chamber formed and is provided, at the .position where the second compression chamber communicates with the first compression chamber, with a first valve. The stationary piston is fixedly disposed in the compressor. The stationary piston is fitted in the moving piston so that the fluid in the second compression chamber is compressed as the moving piston is reciprocated.

Abstract: A suction valve assembly of a reciprocating compressor comprises: a valve supporting body inserted-fixed to a valve mounting portion formed at a piston and provided with at least one suction hole through which a fluid introduced into a suction passage of the piston is supplied to a compression chamber of a cylinder; and a suction valve mounted at the valve supporting body to be rotatable within a certain range, for opening and closing the suction hole formed at the valve supporting body. According to this, a damage of the suction valve due to fatigue is prevented thus to enhance a reliability of the compressor.

Abstract: Disclosed is a reciprocating compressor comprising a piston having a suction path connected to a compression space in the cylinder. A suction valve is mounted at an end surface of the piston for opening and closing the suction path and a discharging valve assembly is mounted at a discharge side of the cylinder for controlling gas discharge by opening and closing the compression space. An adhesion preventing unit is formed at the end surface of the piston or at a contact portion of the piston and the suction valve for minimizing adhesion between the piston and the suction valve due to oil by reducing a contact area between the piston and the suction valve.

Abstract: A discharge apparatus for reciprocating compressor, wherein the compressor comprising: a shell connected to a gas suction conduit for sucking gas; a cylinder in the shell; a compression unit including a piston performing reciprocal movement in the cylinder; a reciprocating motor having an inner stator, an outer stator, and a armature performing reciprocal movement between them; and a frame unit for supporting the compression unit and the reciprocating motor by connecting them, consist of: a first cover member in which a valve body controlling the discharge of compressed gas by switching the cylinder in contained and at least a gas passage is formed; and a second cover member arranged continuously with the first cover member and connected to the gas discharge hole, thereby gas compressed by linear reciprocal movement of the piston in the cylinder is discharged smoothly so the reliability of the compressor operation is improved.

Abstract: A reciprocating pump particularly useful in ventilator apparatus includes a piston reciprocatable axially within a cylinder and dividing its interior into an inlet chamber and an outlet chamber, a wall fixed within the inlet chamber, and a drive housing fixed to the wall. The drive housing includes a motor, a rotor rotatable by the motor, a nut rotatable within the drive housing, and a screw threadedly coupled at one end to the nut and fixed at its opposite end to the piston. The piston is substantially unrestrained for axial and rotary movement such that forward and reverse rotation of the nut by the motor reciprocates the screw and the piston axially of the cylinder, and also permits the screw and the piston to rotate with respect to the cylinder to thereby even out wear between the piston and cylinder.

Abstract: An improved manure transfer system is disclosed. A collection hopper is located at a first location, preferably within a building, for collecting manure and animal waste products from the building. A piston pump apparatus directs and forces the collected manure through a pump cylinder into a below-grade transfer conduit that carries and deposits the manure through a discharge outlet located at a remote, second location. Means for bypassing the pump piston and cylinder are provided for accessing the transfer conduit enabling safe servicing and maintenance of the system. Isolation means are provided at the conduit discharge outlet for isolating the outlet from accumulated manure at the second location.

Abstract: The pump comprises a cylinder delimiting a pumping chamber in which a piston is mounted to slide between an admission orifice and a delivery orifice, the piston including a pumping orifice which is associated with a closure member mounted to pivot about an axis adjacent to the pumping orifice and including a closure face that is substantially plane and that faces the piston.

Abstract: A manually operable hand-held unit for eliminating air from a hose to be used as a pool vacuum hose having a quick coupling adaptor for connecting the air-evacuated hose to the inlet of a powered pool skimmer pump to eliminate the necessity of evacuating air from the hose by manually sucking pool water with the mouth.

Abstract: A pool cleaning method and apparatus in which a vortex is generated to concentrate foreign material at the center of the pool. The vortex can be generated by a pool scrubbing procedure carried out in a systematic manner. The scrubbing and vortex inducing procedure can be carried out by manual means. Large particulate matter is thus suspended in the vortex center and can be removed from the pool with a commercially avaiable strainer. Fine particulate sediment is then removed from the pool center by a manually reciprocated suction device which draws debris laden water from the floor of the pool through a disc shaped filter which retains microscopic particulates. Filtered water is then ejected through the top of the device's barrel assembly.

Abstract: A pumping mechanism comprising a flat base having a central vertical post and a pair of reciprocal pumping elements mounted on the flat base and situated on either side of the central post. Each of the pumping elements comprises an upper moveable assembly and a lower fixed assembly which slidably accepts the lower portion of the upper movable assembly. A driven member pivotally mounted at the midpoint of its length on the central vertical post has each end pivotably connected to each of the reciprocating pumping elements. The driven member serves to raise and lower the pumping elements in a smooth and steady fashion. A pair of collapsible piston assemblies are located within the upper movable assemblies of the reciprocal pumping elements and are collapsed and formed at the top and bottom of each stroke of the pumping elements.

Abstract: A self-priming pistonless lift pump has a first elongate tubular cylinder within which a second elongated tubular cylinder is loosely contained and freely slidable, the respective cylinders having inlet valves at their lower ends, and at their upper ends having fluid outlets, the outlet of the second tubular cylinder being transversely aligned with the outlet of the first cylinder when the second cylinder is in a lowermost position of travel within the first cylinder.

Abstract: A hollow piston pump (10) for pumping animal waste material including paddles (55, 155, 255) to agitate waste material collected in a hopper (11) and aid in its transfer into the hollow piston (17), a pumping chamber (14) including a cylindrical tube (76), and/or a cylindrical hollow piston (17) having antifriction bearings (90) and a seal (91) between its outer surface and the cylindrical tube (76) of the pumping chamber (14).

Abstract: A manure transfer and storage system (2, 102) includes a manure collection hopper (13) disposed at a first location for receiving manure. A pull pump is operatively mounted in the collection hopper (13) and includes a movable piston body (30, 130) which is cooperable with a cylinder (27) for pumping manure from the collection hopper (13) into cylinder (27). Cylinder (27) is connected to a manure transfer pipe (25, 26) for transferring manure to the second remote storage location. In the first embodiment, piston body (30) telescopically slides over cylinder (27) in a straight line motion. In another embodiment, the piston body (130) is pivotably mounted in collection hopper (13) for arcuate rotation about a pivot axis (134). Piston body (130) includes an arcuate manure confining surface (136) which engages the cylinder (27) only along a single line (144).

Abstract: A manure pump 2 includes a collection hopper 4 for collecting manure. A housing 20 attached to the collection hopper 4 has a pump cylinder 32 located therein. The discharge end 38 of the pump cylinder 32 has a one-way check valve 40. Housing 20 also includes a return path 60 which connects the discharge end 38 of pump cylinder 32 to collection hopper 4. When check valve 40 is jammed in a partially open position, the return path 60 is opened by removing a valve plate 68. Operation of pump piston 32 will recirculate the manure through the return path 60 back to the collection hopper 4 to clear the jammed check valve 40.

Abstract: A manure transfer pump with a cylinder, a piston reciprocable in the cylinder, a connecting rod connected to a mid section of the piston and a gate assembly pivotally mounted inside the piston between the axis of the connecting rod connection and the rod end of the piston. In operation, the gate assembly swings open during a return stroke and allows manure to pass through the piston. On a pumping stroke, the gate assembly closes and manure is forced out the discharge end of the cylinder and sucked in the inlet end at the same time.

Abstract: A pump for moving fluid, as blood, having a cylindrical body defining a chamber. A piston movably located in the chamber carries a one-way valve movable to an open position to allow fluid to flow into the chamber and movable to a closed position to pump fluid from the chamber. One or more solenoids operate to reciprocate the piston in the chamber to pump fluid from the chamber. A one-way valve in an inlet passage to the chamber functions to allow the flow of fluid into the chamber and restrict reverse flow of the fluid out of the chamber through the inlet passage.

Abstract: An improved manure handling apparatus of the flow-through piston or plunger type. The apparatus has a passageway, vertically mounted in the floor of a barn with a plunger slidably mounted within the passageway. The plunger has a pair of swinging doors for opening or closing the passageway. First means move the plunger up and down within the passageway to push manure therethrough. Second means move the doors open or closed depending on the direction the plunger is moved.

Abstract: A pumping apparatus used to move manure from a collection chamber through a conduit into a storage or detention pond. The pumping apparatus has a flow-through piston reciprocated with a reversible hydraulic fluid motor. The piston has a pair of gates pivotally mounted about separate generally upright axes at the forward end of the piston to control one-way flow of manure through the piston. A reciprocator operates in conjunction with a pump to alternately supply fluid under pressure to opposite ends of the fluid motor and thereby reciprocate the piston.