Abstract: A pump for a SCR system in vehicles which includes a housing in which at least one pump element is arranged which is activated by a eccentric drive and has at least one a pump piston. The at least one pump piston includes at least a spring bellow which is elastically deformable during pump operation.

Abstract: A rotary heat engine including a central crankshaft and a plurality of cylinder assemblies and a heat exchanger assembly. At least one of the plurality of cylinders, and preferably all of the plurality of cylinders includes a cylinder member, a piston member slidably positionable within the cylinder member, a connecting rod and a rolling diaphragm. The rolling diaphragm is positioned between the piston and the cylinder assembly to define a working volume which is in fluid communication with an opening that is in communication with the heat exchanger body.

Abstract: A rotary heat engine including a central crankshaft and a plurality of cylinder assemblies and a heat exchanger assembly. At least one of the plurality of cylinders, and preferably all of the plurality of cylinders includes a cylinder member, a piston member slidably positionable within the cylinder member, a connecting rod and a rolling diaphragm. The rolling diaphragm is positioned between the piston and the cylinder assembly to define a working volume which is in fluid communication with an opening that is in communication with the heat exchanger body.

Abstract: Methods and apparatus for controlling a processing system are provided herein. In some embodiments, a method of controlling a processing system may include operating a vacuum pump coupled to a process chamber at a first baseline pump idle speed selected to maintain the process chamber at a pressure equal to a first baseline pump idle pressure; monitoring the pressure in the process chamber while operating the vacuum pump at the first baseline pump idle speed; and determining whether the first baseline pump idle pressure can be maintained in the process chamber when the vacuum pump is operating at the first baseline pump idle speed.

Abstract: In at least one illustrative embodiment, a diaphragm pump may comprise a housing defining a first pumping chamber, a second pumping chamber, and a hydraulic fluid chamber, a first flexible diaphragm separating the first pumping chamber from the hydraulic fluid chamber, a second flexible diaphragm separating the second pumping chamber from the hydraulic fluid chamber, a rod mechanically linking the first flexible diaphragm and the second flexible diaphragm such that an expansion of one of the first and second flexible diaphragms exerts a contraction force on the other of the first and second flexible diaphragms, and a piston disposed within the hydraulic fluid chamber and configured to reciprocate to cause a hydraulic fluid contained within the hydraulic fluid chamber to alternately exert an expansion force on the first and second flexible diaphragms.

Abstract: Two chamber pumps and related methods provide a platform for measuring flow rate in about real time without contacting the material being pumped. Pressure and optional temperature sensors disposed in a pressurized chamber allow for flow material delivery calculations after being calibrated or by knowing the initial volume of the flow material to be delivered.

Abstract: A hot beverage maker is provided with a removable pump for cleaning a brewing needle. The pump fits into a brewing chamber which normally receives a pod of an infusible beverage material. A pod receptacle and a lid pivotally connected to the housing form the brewing chamber, After a brewing cycle or when cleaning of the brewing needle is desired, an interior chamber of the pump is filled with cleaning fluid and the pump inserted into the pod receptacle. When the lid is closed, the brewing needle is inserted into the interior chamber. The lid is closed and released repeatedly to operate the pump. This creates a pumping action of the cleaning fluid through the brewing needle to dislodge a buildup of minerals or residual deposits. The used cleaning fluid and dislodged deposits are discarded after the cleaning operation is completed.

Abstract: A fluid pressure indicating device is disclosed. The fluid pressure indicating device includes a base defining an aperture therethrough, a plate separated from the base by a variable distance, the plate defining a hole therethrough, a shaft including a helical surface disposed within the hole of the plate, a first bellows extending between the base and the plate, and a second bellows extending between the base and the plate, the second bellows disposed around the first bellows, the first bellows and the second bellows defining a first chamber therebetween. The first bellows and the second bellows expand or contract in response to a difference between a pressure inside the first chamber and a pressure outside the first chamber. The variable distance between the base and the plate varies upon expansion or contraction of the first bellows and the second bellows, such that the shaft rotates relative to the plate.

Abstract: The present invention relates to a separation type pneumatic dual partition membrane pump, which comprises a pump body and an external pneumatic control valve which is separately installed. Through the operation of the external pneumatic control valve, the main shaft of the pump body and the valve rod of the external pneumatic control valve are reciprocally moved, and the two partition membranes respectively generate stretch and compress motions for changing the volume of each liquid room in the pump body so as to perform the pump stroke and the liquid suction stroke to the liquid.

Abstract: A pump system includes at least one pressure chamber at least partially defined by a helical bellows plunger comprised of a tubular body, a closed front portion, an open rear portion, and at least one contour extending continuously as a helix, longitudinally from proximate the front portion to proximate the rear portion. Methods for forming a helical bellows plunger include molding the helical bellows plunger using a mold core comprising a helically extending exterior contour and a cooperatively associated mold cavity comprising a helically extending interior contour of substantially a same pitch and configured to align with the helically extending exterior contour of the mold core, introducing a molding material therebetween, curing the molding material, and unscrewing the cured molding material from the mold core. Various configurations of helical bellows plungers are also disclosed.

Abstract: A chemical liquid feeding device for feeding chemical liquid used in a semiconductor fabrication process. The device includes three or more pumps arranged in a line. Each pump has different time points of suction stroke and discharge stroke so that the chemical liquid can be fed uniformly without pulsation.

Abstract: A bellows pump having a pump body including a suction path and a discharge path for a fluid and a bellows which is placed in a state where a basal end flange is airtightly fixed to the pump body to form a pump chamber with respect to the pump body. The bellows pump further comprises an actuation plate which is attached to a head portion of the bellows so as to cause the bellows to expand and contract with respect to the pump body. The bellows is further configured so that an airtight space is formed with between the actuation plate and a cup shape section formed in the head portion, such that a pressure rise can be absorbed and relaxed by contraction of the space portion caused by elastic film deformation of the thin head portion which faces the space portion.

Abstract: A reciprocating pump having: a pump body including a suction path and a discharge path for a fluid; a pair of diaphragms; pump shafts which are attached to tip end portions of the diaphragms; a pair of pump flanges which slidably support the pump shafts, and which are integrated with the pump body through connection bodies that are placed outside the diaphragms; connecting rods which connect connecting plates attached to projecting tip-end portions that are projected from the pump flanges in the pump shafts, to each other in a state where the connecting rods are passed through the pump flanges to be placed outside the diaphragms; and a cover cylinder. The connecting rods are slidably supported through slide bearings which are supported by the pump flanges.

Abstract: The subject matter of the invention is a pump device for a container for liquid, pasty or foamable skin care preparations, e.g. for liquid soaps, disinfectants, skin protection pastes or creams, wherein the pump device comprises a conically tapering bellows, wherein the bellows exhibits several bellows elements each having a different diameter, wherein at least one smaller bellows element can be pushed into an adjacent larger bellows element.

Abstract: A pump is provided including a housing and a plurality of diaphragm assemblies radially disposed within the housing, each diaphragm assembly of the plurality of diaphragm assemblies including a diaphragm. A drive element is configured to be eccentrically coupled to a rotating shaft motor to actuate the diaphragm for each of the plurality of diaphragm assemblies to draw fluid into or expel fluid from the diaphragm assembly. The drive element includes a first member and a plurality of second members, each second member of the plurality of second members being movably secured to the first member and disposed between the first member and the diaphragm of each of the plurality of diaphragm assemblies. During actuation of each diaphragm of the plurality of diaphragm assemblies, the corresponding first member and second member provide a continuously rigid radial coupling with the diaphragm.

Abstract: The present invention concerns a multi-cylinder diaphragm machine having at least two hydraulically driven diaphragms includes: a drive unit for producing at least two pulsating hydraulic fluid flows for driving the diaphragms and a delivery unit for delivering a delivery medium and having at least two pump chambers, the volumes of which can be varied by the movement of a respective diaphragm, wherein each delivery chamber is connected by way of a pressure valve to a pressure line and by way of a suction valve to a suction line.

Abstract: A chemical liquid supplying apparatus, which can discharge chemical liquid with high precision, is provided. A pump assembly is detachably mounted in a pump case in which liquid inflow and discharge ports are formed. The pump assembly includes: a cylindrical body in which a piston is slidably incorporated axially; an elastically deformable bellows forming a pump chamber in the pump case and forming a drive chamber in which an indirect medium is enclosed; and an axially elastically-deformable bellows cover continuing with a sliding surface of the piston and forming a seal chamber in which the indirect medium is enclosed, and the pump assembly is unitized. The pump assembly is coupled to a drive shaft via a connecting member, and by axial-directional reciprocating movement of this drive shaft, the piston causes the bellows to perform a pump operation, whereby the chemical liquid is discharged from a liquid discharge portion.

Abstract: An air compressor includes a chassis that supports thereon a motor, a transmission set, and a plurality of extendible barrels. The transmission set includes a clutch that is operatively coupled to the motor through a belt. Two eccentric rotation members are respectively arranged on opposite sides of and coupled to the clutch. Each eccentric rotation member is coupled to a crank arm, which has a moving end connected to the extendible barrel. The extendible barrel is provided with an air inlet port and an air outlet port. When the motor is set in operation, the transmission set drives the extendible barrels to move carry out reciprocal and axial compression to delivery compressed air. The present invention features easy maintenance and can carry out a noise-free operation.

Abstract: An air operated double diaphragm pump comprising an air valve mechanism. The air valve mechanism may comprise a single valve system that replaces the two valve system found in conventional air operated double diaphragm pumps. The position of the valve may be determined by the diaphragm motion of the pump up to a stall position. A spring-loaded mechanical actuation may complete the valve action from the stall position to the final or end of stroke position of the pump.

Abstract: A diaphragm pump (1) has at least two pump heads (3) arranged around a central eccentric pump drive (2), the diaphragms (4) being drivingly connected to the eccentric pump drive (2) via connecting rods (5). The eccentric pump drive (2) has a connecting rod ring (6) to which the ends (9) of the connecting rods are connected via elastic intermediates (10).

Abstract: An air compressor includes a chassis that supports thereon a motor, a transmission set, and a plurality of extendible barrels. The transmission set includes a clutch that is operatively coupled to the motor through a belt. Two eccentric rotation members are respectively arranged on opposite sides of and coupled to the clutch. Each eccentric rotation member is coupled to a crank arm, which has a moving end connected to the extendible barrel. The extendible barrel is provided with an air inlet port and an air outlet port. When the motor is set in operation, the transmission set drives the extendible barrels to move carry out reciprocal and axial compression to delivery compressed air. The present invention features easy maintenance and can carry out a noise-free operation.

Abstract: A hand operated air pump apparatus comprising an internal bellows in communication with an outer bellows wherein variable force on air pump forces compressed air through a discharge valve into a annulus between a bottle and a flexible bladder wherein said pump is attached upon a container or bottle like vessel wherein pumping action forces from bottle highly viscous substances, that may contain solid or abrasive particles, through a discharge spout without internal substance being contaminated by air or other environmental factors thus allowing for an improved method of removing all contents within a container with greater ease.

Abstract: The invention relates to an air core filling system for reclining or seating furniture, for example, for a mattress, an armchair, a car seat, a piece of camping furniture or similar, comprising an air core and an integrated air core filling system, reacting to a load, which independently, supplies a dosed amount of air into the air core, in order to maintain the same at a given adjustable pressure in the non-loaded state. Said air core filling system comprises an air pump system (3) with at least two separate chambers (2, 6) and control system (17), whereby the first chamber (2) is directly connected to the air core by a line (1) and a second chamber (6) is connected to the air core by a line (7) through a pressure regulation valve (13) and to the ambient air by a line (9).

Abstract: A multiple membrane pump for food liquids, comprising at least one duct for the compensated intake of the liquid, which is closed on itself in a loop and is provided with at least one intake port, at least one duct for the compensated delivery of the liquid, which is closed on itself in a loop and is provided with at least one delivery port, at least four branches, which provide a unidirectional connection between the intake duct and the delivery duct and are associated respectively with four liquid pumping membranes, a gearmotor assembly, which is associated with a crank system for actuating the membranes and is adapted to convert the rotary motion of an output shaft of the gearmotor assembly into a reciprocating motion, adjusted with an appropriate timing between two mutually opposite intake and delivery stroke limit positions, of each of the actuation axes of the membranes.

Abstract: A pump is provided including a housing and a plurality of diaphragm assemblies radially disposed within the housing, each diaphragm assembly of the plurality of diaphragm assemblies including a diaphragm. A drive element is configured to be eccentrically coupled to a rotating shaft motor to actuate the diaphragm for each of the plurality of diaphragm assemblies to draw fluid into or expel fluid from the diaphragm assembly. The drive element includes a first member and a plurality of second members, each second member of the plurality of second members being movably secured to the first member and disposed between the first member and the diaphragm of each of the plurality of diaphragm assemblies. During actuation of each diaphragm of the plurality of diaphragm assemblies, the corresponding first member and second member provide a continuously rigid radial coupling with the diaphragm.

Abstract: An air compressor formed of a plurality of collapsible members engaged between opposing rotating side members. The collapsible members alternate between a collapsed state and enlarged state during rotation around the side members which are engaged to polygonal segments of a generally circular rotating frame. Air compressed in each of said collapsible members during rotation toward the collapsed state is communicated to a reservoir in sealed communication with each of the plurality of bellowed members. The reservoir acts to hold-compressed air for use for powering air powered devices.

Abstract: A reciprocating pump (1) comprises a plurality of reciprocating pistons (2a, 2b, 2c) extending along respective longitudinal axes (X-X) parallel to each other and lying in a plane (?), a plurality of pumping work chambers (5a, 5b, 5c), and a plurality of diaphragms (7a, 7b, 7c), each arranged in a respective pumping work chamber (5a, 5b, 5c). In particular, the diaphragms (7a, 7b, 7c) are arranged coplanar in a plane (?) perpendicular to the axes (X-X) of the reciprocating pistons (2a, 2b, 2c), and the diaphragm of at least one reciprocating piston is offset with respect to the diaphragm of the adjacent reciprocating piston, in the direction (Y-Y) perpendicular to the plane (?) defined by the axes (X-X) of the reciprocating pistons (2a, 2b, 2c).

Abstract: A pump (60, 160) has a pair of working members (preferably diaphragms 1, 2, 101, 102) and a pump chamber (3, 4, 103, 104) associated with each working member is communicated via check valves (32-35, 132-135) to a suction manifold (30, 130) and to an outlet manifold (31, 131). A drive mechanism (10, 110) couples the working members so that they reciprocate together and a first of the working members performs an outlet stroke while a second of the working members performs a suction stroke. The suction and outlet manifolds (30, 130, 31, 131) are incorporated in a manifold assembly that connects the pair of diaphragms (1, 2, 101, 102) for coordinated reciprocation. A pair of manually-operated levers (J, 8, 107, 108) are connected together for opposite reciprocation and are drivingly connected to the working members (1, 2, 101, 102).

Abstract: An air pump operably by a motor to pump air is disclosed to include a body, an airbag unit, which is mounted in the body has multiple airbags each having an air chamber, a lifting mechanism rotatable by the motor to move the airbags to pump air, and an air control unit coupled to the airbag unit for exhaust of air from the airbags, said air control unit comprising a partition plate having inlet holes and outlet holes respectively disposed in air communication with the air chambers of the airbag of the airbag unit, an air control valve having inlet flaps to control air into or stop out via said inlet holes of the partition plate, and a top cap having a cap body formed an exhaust hole, air intake tunnels in communication between the inlet flaps and outer lateral peripheral of the cap body and opened air intake openings.

Abstract: The invention relates to a dosing pump comprising a chamber, an inlet valve located in an inlet pertaining to said chamber, and an outlet valve located in an outlet pertaining to said chamber. The chamber is divided into two partial chambers (2, 18) by a separating means. Said separating means comprises a separating valve (38) which opens in the direction of conveyance and which connects the partial chambers (2, 18). The separating means can be moved back and forth in the direction of conveyance and is connected to a drive device for this purpose. When the separating means is moved in the direction of conveyance, dosing liquid is sucked in via the inlet valve (6) and is simultaneously discharged via the outlet valve (28). This process is carried out smoothly and continuously.

Abstract: The invention generally concerns a submersible well pumping system comprising an axially elongated housing and a multi-chamber hydraulically driven diaphragm pump suspended in a well. The pump is driven by a self-contained, closed hydraulic system, activated by an electric, pneumatic or hydraulic motor. Several embodiments are used to reverse the flow of working fluid into and out of the working fluid sub-chambers of a two chambered diaphragm pump to operate the diaphragm pump over all operating conditions including starts and stops, and low speed. Generally, the embodiments sense the end of the pumping stroke, either directly or by time. When the end of the pumping stroke is sensed, the direction of flow is reversed by changing the state of a directional valve, operating a reversing clutch, or by deactivating one prime mover-auxiliary pump and activating a second that operates in the reverse direction.

Abstract: There is provided a pump system excellent in a maintenance ability and compatibility. The pump system comprises a pump (1) for transferring a liquid by alternately supplying air to air chambers (17a, 17b) to extend and contract a pair of bellows (13a, 13b) linked to a shaft (15). It also comprises a switching valve mechanism (2) for switching the air supplied to the pump (1). Switching mechanisms (40a, 40b) are employed to switch the pilot air for controlling the switching operation of the switching valve mechanism (2). The switching mechanisms are detachably attached to cases (16a, 16b) of the pump (1) from outside.

Abstract: The present invention is to provide a dual reciprocating bellows pump which can facilitate size reduction design of the whole pump, permit pump manufacture at low cost, and permit reducing the dead spaces in pumping chambers to provide improved self-suction performance. Valve cases of suction side and discharge side valve units are disposed one below the other along a longitudinal axis passing through the center of the cross-section of the bellows such that they project into the associated pumping chambers, and a pair of interlock shafts are disposed at positions spaced apart to the left and right from the center in the transversal direction. With this construction, it is possible to reduce the dead spaces in the pumping chambers, reduce the longitudinal and transversal dimensions of the pump and facilitate size reduction design of the pump.

Abstract: The present invention is to provide a dual reciprocating bellows pump which can facilitate size reduction design of the whole pump, permit pump manufacture at low cost, and permit reducing the dead spaces in pumping chambers to provide improved self-suction performance.

Abstract: A bellows that is extendingly and contractingly deformable in the axial direction is placed in a pump body, and a liquid chamber is formed inside the bellows. A suction port and a discharge port are formed in an inner bottom face of the pump body facing the liquid chamber. Liquid is sucked from the suction port into the liquid chamber by extension of the bellows, and the liquid in the liquid chamber is discharged from the discharge port by contraction of the bellows. In each of a suction ball type check valve disposed in the suction port, and a discharge ball type check valve disposed in an outflow passage which communicates with the discharge port, a cylindrical valve casing is disposed, and ball valve elements in the valve casing are caused by their own weight to be closely contacted with valve seat, thereby preventing liquid from reversely flowing.

Abstract: The invention generally concerns a submersible well pumping system comprising an axially elongated housing having a diameter less than the bore hole of the well, a multi-chamber hydraulically driven diaphragm pump, suspended in the well. The pump is driven by a self-contained, closed hydraulic system, activated by an electric or hydraulic motor. The flow of working fluid into and out of the working fluid sub-chambers is controlled by a two state main valve with a means to insure the main valve is completely switched, in turn controlled by a control valve which senses the differential pressure across the working diaphragm and generates a hydraulic signal to change the state of the two state main valve, typically when either diaphragm reaches the top of the pumping stroke. Singly or in combination, the means to assure the main valve is completely switched between the two states is an energy storage device, hysterisis in the control valves and or a two position latch the main valve.

Abstract: A system for dispensing and filtering fluid is disclosed, in which the fluid flow path is substantially vertical from the fluid inlet through fluid dispense. Substantially all wetted surfaces are Teflon® or some similar non-contaminating fluid, for applications such as cleanroom processes. A valve and a filter chamber are incorporated into a pump head to simplify the flow path and reduce potential contamination points. Preferred methods, and chips or other microelectronic devices fabricated from the apparatus or methods, are also disclosed.

Abstract: A photoresist dispense pump receives photoresist from two pipelines, a first pipeline and a second pipeline, and pumps out the photoresist through a third pipeline. The photoresist dispense pump contains a first bellows and a second bellows receiving photoresist from the second pipeline, wherein the first bellows and the second bellows are separated by a partition. Photoresist is fed into the third pipeline from the second bellows. On the center region of the partition, there is a central diaphragm that allows photoresist to flow in a direction from the first bellows toward the second bellows, but not in the reverse direction.

Abstract: A pump for impelling a fluid includes a first variable volume, the first variable volume having a first inlet for allowing the influx of the fluid into the first variable volume and a first outlet for allowing the efflux of the fluid out of the first variable volume and a first membrane defining at least a portion of the first variable volume. The pump also includes a first contractile actuator, for displacing the first membrane from a first position to a second position in such a manner as to vary the first variable volume and a second contractile actuator, for restoring the first membrane from the second position to the first position in such a manner as to vary the first variable volume. A first check valve is coupled to the first inlet for regulating the influx of fluid into the first variable volume through the first inlet and a second check valve is coupled to the first outlet for regulating the efflux of the fluid out of the first variable volume through the first outlet.

Abstract: The invention generally concerns a submersible well pumping system comprising an axially elongated housing having a diameter less than the bore hole of the well, a multi-chamber hydraulically driven diaphragm pump, suspended in the well using coiled tubing, in which the coiled tubing contains one or more electrical cables to provide power to the pump from the surface. The pump is driven by a self-contained, closed loop hydraulic system, activated by an electric or hydraulic motor. The flow of working fluid into and out of the pumping chambers is controlled by a two state snap-acting valve, in turn controlled by a sensor which senses the proximity of the working diaphragm and generates an electrical signal to change the state of the valve, typically when either diaphragm reaches the bottom of the pumping stroke.

Abstract: An aspirator pump, especially for medical purposes, has a receptacle with two chambers arranged alongside each other, which are connected with a suction tube, and on each of which an element is arranged which is movable approximately parallel to the other, each partially enclosing a hollow space for generating a vacuum. The two movable elements are connected to each other by means of a lever, whose two end parts are attached at the upper area of the respective movable elements, and whose middle part is movably attached in a bearing positioned between the chambers. In the upper area of each movable element a one way valve is installed which opens when the pressure in the hollow space is higher than the surrounding air pressure. An easy operation and cleaning, as well as a reliable aspiration is obtained with the aspirator pump, owing to the fact that at all times a chamber and a movable element enclose a common, variable hollow space, wherein the movable element bounds the upper area of the hollow space.

Abstract: A bubble generator for a washing machine which utilizes bellows and an actuating cam for actuating the bellows is disclosed. The bubble generator includes a housing and a body installed within the housing. The body includes inlets for inflow of air at one side thereof, outlets for outflow of air at the other side thereof and passages for communicating the inlets with the outlets. Partitions for closing said passages are formed on the way of the passages, and spaces for expanding compressed air are formed adjacent to the outlets. An opposite pair of bellows are provided on an inner wall of the body. A plurality of holes are formed at the inner wall, one half of holes being for inflow of air into the pair of bellows, the other half of holes being for outflow of air out of the pair of bellows. An actuating cam for vibrating the pair of bellows by rotation is provided between the pair of bellows.

Abstract: Fuel is pressurized by the expansion and contraction of a pump chamber defined inside a casing according to the rotation of a power input shaft which penetrates from the outside of the casing into its inside. A first seal member is provided between the casing and the power input shaft and prevents escape of fuel which is inside the casing, and a second seal member is provided in series therewith. Further, leakage of fuel to the outside of the casing from the second seal member is prevented by the provision of a drain conduit which drains fuel which has leaked into a space defined between the first seal member and the second seal member.

Abstract: A cam plate pump comprises a pressurizing chamber formed by a bellows which elongates and contracts along a center axis parallel to the input shaft of the pump. The cam plate rotates together with the input shaft, and compresses the bellows via a piston. A mechanism for guiding the piston along the center axis, and a mechanism for blocking the rotational torque acting on the bellows via the piston are provided. These mechanisms prevent a bending load or twisting load from acting on the bellows.

Abstract: A magnetostrictive pump is provided which makes use of a magnetostrictive element which, when an alternating magnetic field is applied to it, compresses a chamber containing a working fluid. A bellows located within the working fluid is repeatedly compressed by the compression of the chamber, and pumps a fluid to be pumped in and out of the bellows. Since the magnetostrictive element does not directly contact the bellows, the bellows life is greatly extended. Valves are provided to direct the fluid flow in a desired manner. The pump may be combined with other pumps in various series or parallel arrangements to create a pump system. The pump may be pre-biased to make its response more linear by either mechanical or magnetic biasing. A permanent magnet may be used to magnetically bias the pump and create an "at-rest" initial extension of the magnetostrictive element. Similarly, a spring may be used to mechanically load the magnetostrictive element.

Abstract: A diaphragm pump comprised of a shaft, means for rotating the shaft at a speed of less than 3,000 revolutions per minute, a first connecting rod connected to a first diaphragm and operatively connected to the shaft, a second connecting rod connected to a second diaphragm and operatively connected to the shaft, and means for converting rotary motion of the shaft into reciprocating linear motion of both the first connecting rod and the second connecting rod such that, as the first connecting rod is moved in a first direction at a first rate of travel, the second connecting rod is simultaneously moved in a second linear direction at a second rate of travel, which is equal to said first rate of travel, and wherein the second linear direction is the opposite of the first linear direction.

Abstract: The present invention provides an improved design for a mechanical pump. The pump is a dual chamber design typically including a pair of expandable bellows driven in a reciprocating fashion by a supply of pressurized air. The use of expandable bellows reduces wear on the pump thereby lengthening the required maintenance intervals in comparison with dual chamber diaphragm pumps previously known. Additionally, the pump is easily disassembled for inspection, cleaning or maintenance. Furthermore, the high strength of the pump's design makes it possible to manufacture the pump entirely of corrosion resistant materials.

Abstract: The present invention provides an improved design for a mechanical pump. The pump is a dual chamber design typically including a pair of expandable bellows driven in a reciprocating fashion by a supply of pressurized air. The use of expandable bellows reduces wear on the pump thereby lengthening the required maintenance intervals in comparison with dual chamber diaphragm pumps previously known. Additionally, the pump is easily disassembled for inspection, cleaning or maintenance. Furthermore, the high strength of the pump's design makes it possible to manufacture the pump entirely of corrosion resistant materials.

Abstract: A pulmonary resuscitator is set forth of the type having a compressible bladder to be depressed to supply air to a mask. Both the compressible bladder and mask have integral therewith a network of inflatable tubes which when pressurized resiliently rigidify the bladder and mask to establish nominal erected bladder and mask shapes. The bladder has an inlet check valve and the mask has an outlet check valve where the outlet check valve utilizes a flapper valve for permitting flow of fluid into the mask upon depression of the bladder. Exhaust ports are located adjacent the flapper valve and are closed by the flapper valve when the bladder is depressed. The exhaust ports are opened when the flapper valve closes as the bladder returns to its nominal shape after being depressed. An air spring contained within the bladder chamber is in fluid communication with the network of inflatable tubes and through limiting orifices controls the rate at which the bladder returns to its nominal shape after depression.

Abstract: A compressor integral with a Stirling engine having a pressure space comprises a housing, a partition wall provided in the housing, a first pressure chamber defined in the housing at one side of the partition wall and connected with the pressure space of the Stirling engine, and a second pressure chamber defined in the housing at the other side of the partition wall and connected with the first pressure chamber via an orifice. A rod passes through the partition wall and has a first end and a second end located in the first pressure chamber and the second pressure chamber, respectively. A third pressure chamber is defined by a first plate which is connected to the first end of the rod and a first bellows located between the first plate and the partition wall. A fourth pressure chamber is defined by a first plate which is connected to the second end of the rod and a second bellows located between the second plate and the partition wall.