Abstract: A variable pressure air pump includes a first cylinder and a second cylinder movable relative to the first cylinder along a longitudinal axis. An air tube is mounted in the first and second cylinders. A mounting portion is integrally formed on a first end of the air tube. A first piston and a second piston compress air in the first and second cylinders. A connecting device is mounted to the first cylinder for coupling with an object to be inflated. An air escape device selectively seals a second chamber of the second cylinder to selectively compress the air in the second cylinder. A first check valve is mounted to the mounting portion of the air tube. A second check valve is mounted to the second piston.

Abstract: A reciprocating pump includes a frame for a power end, a skid support structure integrally formed at a base of the power end frame to provide proper support and rigidity for the pump power end, where the integral skid support structure has a plurality of struts forming a series of chambers.

Abstract: A peristaltic pump includes a cam shaft, a plunger-cam follower, a tube receiver, a spring-biased plunger, a spring, a position sensor, and a processor. The cam shaft has a plunger cam. The plunger-cam follower engages the plunger cam to follow the plunger cam and to disengage from the plunger cam. The spring-biased plunger is coupled to the plunger-cam follower and the spring biases the spring-biased plunger toward the tube receiver. The position sensor determines a position of the spring-biased plunger when the plunger-cam follower is disengaged from the plunger cam and the spring applies a force from the spring-biased plunger against the tube. The processor estimates fluid flow utilizing the position of the spring-biased plunger as indicated by the position sensor when the plunger-cam follower is disengaged from the plunger cam and the spring applies the force from the spring-biased plunger against the tube.

Abstract: A peristaltic pump includes a cam shaft, first and second pinch-valve cams, first and second pinch-valve cam followers, a plunger cam, a plunger-cam follower, a tube receiver, a spring-cam plunger, a position sensor, and a processor. The plunger cam is coupled to the cam shaft. The plunger-cam follower is configured to engage the plunger cam. The spring-biased plunger is coupled to the plunger-cam follower where expansion of the plunger cam along a radial angle intersecting the plunger-cam follower as the cam shaft rotates pushes the plunger cam to disengage the spring-biased plunger from the tube and a spring coupled to the spring-biased plunger biases the spring-biased plunger to apply the crushing force to the tube. The position sensor is operatively coupled to the spring-biased plunger and is configured to determine a position of the spring-biased plunger. The processor estimates fluid flow using the position.

Abstract: A pneumatic reciprocating fluid pump for pumping a fluid includes at least one check valve assembly that includes a check valve body insert, a ball within the valve body insert, and an annular sealing ring member disposed within a seat ring receptacle. The sealing ring member has dimensions smaller than corresponding dimensions of the seat ring receptacle, such that the sealing ring member is capable of moving within the seat ring receptacle. The ball is configured to slide back and forth between a first position and a second position within the check valve body insert responsive to forward and reverse flow of fluid therethrough. In one position, the ball is seated against the sealing ring member and prevents reverse flow of the fluid through the check valve assembly, and forward flow of the fluid through the check valve assembly is enabled when the ball is in another position.

Abstract: A peristaltic pump having at least first, second, and third stages is provided. The peristaltic pump includes a plunger, inlet and outlet valves, a spring, and an actuator. The plunger actuates toward and away from a tube, the inlet valve is upstream of the plunger, the outlet valve is downstream of the plunger, the spring biases the plunger toward the tube, and the actuator mechanically engages and disengages from the plunger. In the first stage, the inlet valve is opened and the plunger is actuated from the tube, in the second stage, the inlet valve is closed, the plunger is actuated toward the tube, and the actuator is mechanically disengaged from the plunger, and in the third stage, the outlet valve is opened. In the third stage or in a fourth stage, the actuator actuates the plunger toward the tube to discharge fluid downstream past the outlet valve.

Abstract: A peristaltic pump, and related system method are provided. The peristaltic pump includes a cam shaft, first and second pinch-valve cams, first and second pinch-valve cam followers, a plunger cam, a plunger-cam follower, a tube receiver, and a spring-biased plunger. The first and second pinch-valve cams are coupled to the cam shaft. The first and second pinch-valve cam followers each engage the first and second pinch-valve cams, respectively. The plunger cam is coupled to the cam shaft. The plunger-cam follower engages the plunger cam. The tube receiver is configured to receive a tube. The spring-biased plunger is coupled to the plunger-cam follower such that the expansion of the plunger cam along a radial angle intersecting the plunger-cam follower as the cam shaft rotates pushes the plunger cam follower towards the plunger and thereby disengages the spring-biased plunger from the tube. A spring coupled to the spring-biased plunger biases the spring-biased plunger to apply the crushing force to the tube.

Abstract: An air pump includes a pumping system, a storage tank, a discharge passage, and a valve. The discharge passage includes a first section and a second section wider than the first section. The valve is movable in the discharge passage. The valve, disposed in a first position, includes a first seal end disposed in the first section and abutting a periphery thereof and includes a second seal end disposed in the second section and abutting a periphery thereof. The valve, disposed in a second position, includes the first seal end disengaging from the first section and not abutting the periphery thereof and includes the second seal end disposed in the second section and abutting the periphery thereof. The first and second seal ends respectively have first and second cross-sectional areas. The ratio of the second cross-sectional area to the first cross-sectional area is at least 2 to 1.

Abstract: An air pump includes an air reservoir, a discharge passage, a valve, and a pusher. The discharge passage includes a first section and a second section wider than the first section. The valve, disposed in a first position, includes first and second seal ends respectively disposed in the first and second sections. The valve, disposed in a second position, includes the first seal end disengaging from the first section and includes the second seal end disposed in the second section. The second seal end has a greater cross-sectional area than the first seal end. The pusher is movably retained in the air reservoir and is movable between a first position spaced from the valve and a second position abutting the valve. The valve is disposed in the second position when the pusher is disposed in the second position.

Abstract: A pneumatic reciprocating fluid pump for pumping a fluid includes at least one check valve assembly that includes a check valve body insert, a ball within the valve body insert, and an annular sealing ring member disposed within a seat ring receptacle. The sealing ring member has dimensions smaller than corresponding dimensions of the seat ring receptacle, such that the sealing ring member is capable of moving within the seat ring receptacle. The ball is configured to slide back and forth between a first position and a second position within the check valve body insert responsive to forward and reverse flow of fluid therethrough. In one position, the ball is seated against the sealing ring member and prevents reverse flow of the fluid through the check valve assembly, and forward flow of the fluid through the check valve assembly is enabled when the ball is in another position.

Abstract: A pump assembly includes a motor and a pump, with the motor having an output shaft that extends into a volute chamber defined by a housing of the pump. An impeller may be mounted to the end of the output shaft. A heating element maybe located within a projection formed in an end of the housing and defines a heat transfer area confronting the volute chamber, wherein heat generated by the heating element may be conducted into the volute chamber.

Abstract: A pump aggregate (A) comprises a housing (1, 2, 4), a high-pressure pump (5) and a low-pressure pump (6) disposed in the housing, an oil-immersed electric motor (7), a return connection point (8) connected to a return line (9), and a valve arrangement (V) mounted between separated discharge outlet ports of both pumps (5, 6) and a pressure connection point (P). The valve arrangement (V) comprises at least a low-pressure change-over valve (U), a check valve (R) for combining discharge flows of both pumps (5, 6), and a system pressure-limiting valve (DB). At least the low-pressure change-over valve (U) and the check valve (R) are arranged in an interior of the housing (1, 2, 4) and are connected so that the discharge flows of both pumps (5, 6) are combined in the housing interior for a single pressure outlet (13, P?) of the housing, and wherein the system pressure-limiting valve (DB) is connected to the pressure outlet and is mounted on an exterior of the housing.

Abstract: A downhole pumping assembly has a tubing string with plural barrels which are arranged in-line with the tubing. The tubing string has a seating location adjacent to each barrel. A standing valve arrangement, which includes a standing valve and a seating device, is located with the standing valve adjacent to the lower end of one of the barrels. A plunger has a traveling valve that is located for reciprocation within the one barrel. The plunger has a clearance with each of the barrels so as to form a fluid seal. The plunger reciprocates inside the barrel so as to lift fluid to the surface. Over time, the barrel will exhibit wear. Instead of pulling the entire tubing string to replace the barrel, the standing valve and the plunger are relocated to one of the other barrels located in the tubing string and reciprocation is resumed to resume pumping.

Abstract: A compact manual pump includes a body, a valve assembly connected with the body, and a first cylinder assembly rotatable with respect to the body. The body includes first and second collect inlets, and an exhaust outlet. The first cylinder assembly includes a seat, first and second inflating inlets. While the first cylinder assembly is rotated to switch to low pressure pumping mode, the first inflating inlet is connected with the first collect inlet and the second inflating inlet is connected with the second collect inlet and the exhaust outlet is blocked by the seat. While the first cylinder assembly is rotated to switch to high pressure pumping mode, the first inflating inlet is connected with the first collect inlet and the second inflating inlet is connected with the exhaust outlet and the second collect inlet is blocked by the seat.

Abstract: The invention relates to a reciprocating piston pump having a magnet drive and a first displacement chamber and a second displacement chamber, which are separated from each other by a piston , wherein both displacement chambers are connected to each other by a fluid-conducting channel. An overflow valve is arranged in the channel and allows a preferred flow from the first displacement chamber to the second displacement chamber, wherein an additional return valve is arranged either in a transition region between an inlet and the first displacement chamber or in a transition region between the second displacement chamber and an outlet, an armature of the magnet drive being firmly connected to the piston.

Abstract: A high-pressure piston compressor (1) for compressing gas, comprising a vessel (4) having a vessel chamber (8, 23) wherein a piston (3) is guided reciprocally, for compressing a gas in the vessel chamber during operation of the piston compressor, an inlet valve housing (17, 29) comprising an inlet valve (18, 30), and an outlet valve housing (15, 31) comprising an outlet valve (16, 32), wherein the inlet valve housing and the outlet valve housing are mounted within a portion of the vessel chamber wall (14, 28), and wherein the portion of the vessel chamber wall encloses the inlet valve housing and the outlet valve housing, such that the portion of the vessel chamber wall generates an isostatic counter-pressure on the inlet valve housing and the outlet valve housing in response to the pressure on the inlet valve housing and the outlet valve housing from the gas in the vessel chamber during operation of the piston compressor.

Abstract: The invention relates to a feed pump for supplying lubricant to at least one lubricating point, with at least one driving module and at least one pump module. Each driving module and each pump module is selected from a modular system which comprises a plurality of driving modules and/or a plurality of pump modules which each have at least one connecting region. In this case, the connecting regions are matched to one another in such a manner that the at least one driving module can be exchanged for at least one further driving module and/or the at least one pump module can be exchanged for at least one further pump module.

Abstract: The invention relates to a lubricant or hydraulic pump for delivering oil or the like having a housing which is formed from two housing shells which are of at least substantially similar or identical construction. An inlet is provided on or in the housing. Furthermore, a rotatably mounted drive element, which is configured, in particular, as a swash plate, and at least one pump element which interacts with the drive element to deliver oil or the like are arranged in the housing.

Abstract: A water inlet unit for an amphibious pump includes a housing having a connecting hole, a first water inlet pipe having a first end connected to the connecting hole and a second end provided with a first water inlet port, a second water inlet pipe having a first end connected to the connecting hole and a second end provided with a second water inlet port, a guide member mounted on the housing and connected to the connecting hole, and a tap detachably locked in the first water inlet port or the second water inlet port. Thus, the water inlet unit has a first water inlet port and a second water inlet port so that the water inlet unit and the amphibious pump are disposed at an upright or transverse state according to the practical space requirement.

Abstract: A downhole pumping assembly has a tubing string with plural barrels which are arranged in-line with the tubing. The tubing string has a seating location adjacent to each barrel. A standing valve arrangement, which includes a standing valve and a seating device, is located with the standing valve adjacent to the lower end of one of the barrels. A plunger has a traveling valve that is located for reciprocation within the one barrel. The plunger has a clearance with each of the barrels so as to form a fluid seal. The plunger reciprocates inside the barrel so as to lift fluid to the surface. Over time, the barrel will exhibit wear. Instead of pulling the entire tubing string to replace the barrel, the standing valve and the plunger are relocated to one of the other barrels located in the tubing string and reciprocation is resumed to resume pumping.

Abstract: An air compressor includes a compressor unit having a motor with a motor housing, a pump operably coupled to the motor and having a pump housing formed as a single piece with a portion of the motor housing, and a first tank fluidly connected to the pump to receive pressurized air from the pump when operated by the motor. The air compressor also includes a tank unit removably coupled to the compressor unit in a stacked arrangement. The tank unit includes a second tank fluidly connected to the pump to receive pressurized air from the pump when operated by the motor.

Abstract: A gas compressor unit according to the invention includes a single gas desiccant bed and condenser (which is inactive during the compression stage) inserted into the gas flow path of the compression cycle. In the case of a multistage compressor, the single gas desiccant bed is inserted between preferably the first and second stages. Moisture absorbed into this bed is periodically removed by exposing the bed to a regeneration cycle. The regeneration cycle employed is based on the closed re-circulation of gas present in the compressor and the desiccant bed itself, as well as other gas present in the re-circulation loop when the unit suspends delivery of compressed gas. Moisture removed from the desiccant bed is condensed and preferably evaporated into the environment through a semipermeable membrane. The motor and motor controller are located with the compressor in a common casing to minimize electromagnetic emissions.

Abstract: The invention concerns an operating unit to generate a flow of air under pressure in aerosol therapy equipment, comprising a pump group (12) powered by a motor and having a head (19), with an air inlet duct (22) complete with filter (24) and an air outlet duct (23). The pump group is enclosed in a body made up of two shells, top and bottom, (13, 14) which overlap and fit together on a transversal plane at the level of their edges. The shells forming the body receive and hold the air inlet duct (22) with filter, the air outlet duct (23) and a plate with socket and switch following their overlapping for automizable assembly of the group.

Abstract: The invention relates to a medical pump, especially for water jet surgery, in which a pump unit is assembled as a single use article and can be reversibly connected to a pump actuating device. Within the pump, the pump actuating device is also used to open up the connection between the pump unit and the pump actuating device.

Abstract: An apparatus for delivering a viscous material by means of an eccentric screw pump, includes a framework for carrying and fastening apparatus elements, a pump-housing portion for carrying a stator and a rotor in the form of a delivery screw, suction and pressure regions for introducing and discharging the delivery material, respectively, an electric drive unit for driving the rotor in the stator in a first direction of rotation for delivering the delivery material, a control mechanism for activating the drive unit, and one or more releasable retaining members for the rotationally fixed and/or positionally fixed connection of the drive unit and of the stator. A change in the direction of rotation to a second direction of rotation of the electric drive unit, with the retaining mechanism released, gives rise to automatic separation of the pump-housing portion with the stator by virtue of the rotor being unscrewed.

Abstract: A method comprises providing a motor with a stator comprising a plurality of laminations stacked side to side to form a contiguous stator core with each of the laminations having a plurality of radial fins projecting outward from a periphery of the lamination, and a rotor with permanent magnets spaced about the rotor configured to synchronously magnetically couple with a rotating magnetic field in the stator. The method further comprises providing a cooling tower with a fan disposed therein having a shaft extending from a center of the fan for rotating the fan. The motor is installed in the cooling tower such that the rotor of the motor is coupled directly to the fan shaft and rotates the fan when the motor is energized during normal operation of the cooling tower.

Abstract: A mini pump comprises a head including a connective end, a nozzle and an air channel communicating the connective end with the nozzle; a cylinder means removably engaged with the connective end of the head; and a tube selectively received in the cylinder means and having an end connected to the connective end. Wherein the head is locked to the cylinder means and the tube is concealed in the cylinder means when the head is in a first position. Wherein the head is disengaged from the cylinder means and the tube extends out of the cylinder means when the head is in a second position.

Abstract: A fluid control mechanism includes a laser irradiation control unit to control irradiation of a light beam generated by a laser generation unit, and a liquid tank, having at least one liquid passing port and a lens to collect the light beam in the liquid tank, to hold liquid. The laser irradiation control unit emits the light beam to the lens to collect the light beam by the lens, thereby causing thermal expansion of the liquid in the liquid tank, to control inflow/outflow of the liquid via the liquid passing port.

Abstract: A hydraulic pump apparatus having an internal sump formed by a housing having an internal portion and an end cap secured to the housing. A rotatable cylinder block is located in the sump and driven by an input shaft extending into the housing. The pump apparatus also has a system of hydraulic porting in fluid communication with the cylinder block. The porting includes a pair of system ports located on a first side of the hydraulic pump apparatus, a fluid inlet on a second side of the hydraulic pump apparatus, opposite the first side, and a bypass valve positioned on the second side adjacent to the fluid inlet.

Abstract: A submersible pump apparatus comprising a housing containing all the components of the pump assembly for using the submersible pump apparatus in a body of water. A float or a plurality of floats are attached to the top side of the housing for providing a positive buoyancy to the submersible pump apparatus. The float is provided with a channel for slidably receiving a single weight or a plurality of weights. The weight is used to overcome the positive buoyancy of the float and achieve a negative buoyancy for submerging the submersible pump apparatus to the bottom of the body of water. A sled is attached to the bottom side of the housing and comprises the combination of both legs and feet for supporting the submersible pump apparatus at the bottom of a body of water. A finder float floating at the water surface level is attached using a rope to both the weight and the housing. By removing the weight or weights from the float, a positive buoyancy is restored to raise the submersible pump apparatus.

Abstract: A pump with variant strokes has a body, a piston assembly and a decelerating member. The body and the decelerating member are respectively mounted adjacent to the piston assembly. A holder is mounted in the piston assembly and has multiple openings. When the decelerating member is driven to rotate and engages one of the openings in the holder, the piston assembly can move back and forth. Adjusting the decelerating member to connect to different one of the openings of the holder to form different rotating diameters can adjust the strokes of the present invention to provide different pressure and flow capacity.

Abstract: A hydraulic pump apparatus having an internal sump formed by a housing having an internal portion and an end cap secured to the housing. A rotatable cylinder block is located in the sump and driven by an input shaft extending into the housing. The pump apparatus also has a system of hydraulic porting in fluid communication with the cylinder block. The porting includes a pair of system ports located on a first side of the hydraulic pump apparatus, a fluid inlet on a second side of the hydraulic pump apparatus, opposite the first side, and a bypass valve positioned on the second side adjacent to the fluid inlet. A case drain may also be formed on a third side of the pump apparatus.

Abstract: An electric fan with more than one operational configuration is disclosed, comprising a fan unit, a first support element and a second support element. In one operational configuration, the fan unit rests on top of the first support element and generates a horizontally oscillating airflow. In another configuration, the fan unit rests on top of the second support element and generates a vertically oscillating airflow.

Abstract: A plurality of vacuum producing units capable of being employed together or independently of each other, each have a housing. The housing is internally provided with at least one ejector receiving means fitted with an ejector insert. The housings have the same transverse dimensions of at least one ejector receiving means. Individual vacuum producing units are fitted with different types of ejector inserts in the ejector receiving means for setting different fluid flow paths.

Abstract: An inflatable product includes an inflatable body, a socket, an electric pump, at least one battery and a connector. The socket is built in the inflatable body. The electric pump is connected to the socket to pump the inflatable body. The battery is disposed in the electric pump. The connector is provided on the electric pump for connecting an external power. The electric pump is supplied with power by the battery or the external power.

Abstract: A foldable pump includes a cylinder, a first connector in communication with the cylinder, a second connector pivotally connected and communicated with the first connector, a tube in communication with the second connector and a nozzle in communication with the tube. The first connector may include a first tubular portion and a second tubular portion extending perpendicularly from and being in communication with the first tubular portion. The second connector may include a first tubular portion and a second tubular portion extending perpendicularly from and being in communication with the first tubular portion. The second tubular portion of the first connector is mounted on the cylinder. The first tubular portion of the first connector is pivotally connected and communicated with the first tubular portion of the second connector. The second tubular portion of the second connector is in communication with the tube.

Abstract: A blower apparatus for preventing pots being used to heat liquid from boiling over. The blower apparatus includes a blower housing having an outlet nozzle; a blower assembly positioned in the blower housing for pushing a stream of air out of the housing through the outlet nozzle, the outlet nozzle is positioned at a top of the housing thus the outlet nozzle is designed for directing the stream of air over an adjacently positioned piece of cookware in which a liquid is being heated.

Abstract: A symmetric pump having a symmetric end cap attached to a symmetric housing is disclosed. The end cap is attachable in a first position or a second position wherein the second position is rotated relative to the housing. A trunnion arm extends in a first direction and a system port opens in a first orientation when the housing is connected to the end cap in a first position, The end cap includes structure such that the housing may be connected in a second position so that the trunnion arm extends in a second direction while maintaining the system port opening in the first orientation. The end cap may be provided with a symmetric porting system. A control device for affecting movement of the swashplate is disclosed. Methods of locking the swashplate into a predetermined position are also taught.

Abstract: A fluid pump is provided that produces an outflow of fluid that is not proportional to the speed of the input drive. Thus, the fluid pump can be tuned to provide a substantially constant outflow of fluid irrespective of the speed of the input drive. The fluid pump also provides fluid outflow when the rotational direction of the input drive is reversed.

Abstract: A pressure adjusting device has a pumping device, a connector device, and a connection pipe connected to the pumping device and the connector device. The pumping device has a hollow cylinder, a plunger device inserted through the hollow cylinder, a cover covering the hollow cylinder, a check valve and a non-return valve inserted in the cover, and an inhale joint and an exhale joint connected to the cover. The connector device has a stepped post, a threaded rod inserted through the stepped post, a handle bar disposed on the stepped post, and a button disposed on the handle bar and receiving the threaded rod. The threaded rod has a head portion inserted in the connection pipe.

Abstract: A gas compression apparatus and method according to which a compression cylinder is connected between two heads, and gas is introduced into at least one header and into the cylinder. A piston is reciprocated in the cylinder with a stroke corresponding to the length of the cylinder to compress the gas after which the compressed gas is discharged from the cylinder. If the cylinder bore becomes damaged or wears out, or if it is desired to change the stroke length of the piston, the cylinder can easily be replaced by disconnecting it from the heads and installing another cylinder between the heads.

Abstract: A fixed capacity swash plate type compressor permits cost reduction by using components and assembly steps common to those of a variable capacity swash plate type compressor. In place of a capacity control valve assembly that controls the opening of at least one of a refrigerant gas supplying passage and a bleed passage to adjust a crank chamber pressure, a cock member that maintains communication between a crank chamber area and a suction pressure area to disable capacity control while the compressor is in operation is installed in a compartment of the capacity control valve assembly in the variable capacity swash plate type compressor.

Abstract: A manual air pump includes an outer cylinder having a chamber therein, a head provided to a second end of the outer cylinder and including an outlet passage communicated with the chamber for supplying air to an object to be inflated, and an inner cylinder reciprocatingly mounted in the outer cylinder and including a longitudinal hole. An outer piston is attached to an end of the inner cylinder to move therewith. The outer piston includes a passage that is intercommunicated between the longitudinal hole of the inner cylinder and the outlet passage of the head. A piston rod is reciprocatingly mounted in longitudinal hole of the inner cylinder. An inner piston is attached to a second end of the piston rod to move therewith. A handle is secured to a first end of the piston rod to move therewith. A switch member is rotatably mounted to the first end of the outer cylinder and around the first end of the inner cylinder.

Abstract: A vane pump assembly which uses a biasing means for regulating the internal and maximal output pressure of the vane pump rather than the maximal output of the pump motor. The pump assembly includes a motor having an output drive shaft, a housing having a front end and a rear end seated on the motor, a cylindrical member received Within the housing, first and second closure members which overlie the respective front and rear ends of the cylindrical member, a cylindrical hub eccentrically received on the drive shaft within the cylindrical member, a plurality of vanes disposed about the cylindrical hub, a cap member covering the front end of the pump housing, and a resilient means disposed between the motor and the second closure member for selectively biasing the cylindrical member between the first and second closure members and enabling the pump to develop a preselected maximum output therefrom without halting rotation of the cylindrical hub.

Abstract: A double pump unit including two hydraulic pumps (1, 2) having drive shafts (5, 6) arranged coaxially with one another, which shafts are coupled with one another in a force-locking manner by a coupling piece (23). The coupling piece (23) is integrated in a connection piece (26) at least partially surrounding the coupling piece, in which connection piece there are formed suction channels (19, 20) for drawing in the pressure medium to be delivered through the hydraulic pumps (1, 2). The connection piece (26) has an inlet pressure chamber (33) into which the suction channels (19, 20) open. Further, the coupling piece (23) has peripherally arranged blade elements (30, 31) which rotate in the inlet pressure chamber (33) in order to feed the pressure medium into the suction channels (19, 20) under an initial pressure.

Abstract: An electric motor is connected via cog belt to a dual purpose pulley on the water pump of an automobile, to increase power available from the engine so that during racing maximum horsepower can be achieved. Enhanced cooling of the engine is also obtained.

Abstract: A rotary reciprocating pumping apparatus is provided with a positive two position adjustment feature which allows the piston stroke to be increased to a maximum and repeatably, automatically, returned to a second calibrated dispensing position. Such rotary reciprocating pump is further provided with an adjustable liquid displacement velocity profile to maintain sufficient velocity of liquid flow at the end of the pump discharge cycle to enable injection of small volumes of liquid through a pump exhaust port, thereby eliminating the inaccurate and time consuming operation of touching off a small volume of liquid as a drop characterizing known rotary reciprocating pumping systems.

Abstract: The present invention relates to a radial piston pump, and more particularly to a radial piston pump suitable for delivering liquid at a high pressure and at a volumetric output rate which can be controlled independently of the speed of rotation of the pump drive shaft. A radial piston pump(1) is provided which comprises a multiplicity of radially extending cylinders(14) each of which is provided with a radially moveable pumping plunger(15) to define, within the cylinder, a pumping chamber(16) which may be increased in volume by a movement of its associated plunger(15) in one direction to receive a liquid to be pumped and may be reduced in volume by movement of its associated plunger(15) in the opposite direction to deliver a liquid at high pressure to an output line. The pump(1) also comprises means for selectively disabling one or more of the pumping chambers(16) so that the or each disabled pumping chamber delivers no pumped fluid to the output line.

Abstract: An electric motor is connected via cog belt to a dual purpose pulley on the water pump of an automobile, to increase power available from the engine so that during racing maximum horsepower can be achieved. Enhanced cooling of the engine is also obtained.

Abstract: A tandem, swash plate-type hydraulic pump in which a drive force transmission system for extending one or more hydraulic pumps and a structure relating to the system can be made simple and light, and one or more hydraulic pumps even when extended can be compactly arranged without increasing the axial length of the pump unit. A drive force take-out mechanism for taking outward part of a driving force out of a spline sleeve member of a spline coupling which is an intermediate coupling of a tandem, swash plate-type hydraulic pump. A first gear is connected with a spline sleeve member and a gear box. The gear box is composed of an intermediate gear, a driven gear, a spline sleeve member, and a gear case for rotatably housing these components. The gear box is removably fixed to an intermediate block and provided on both surfaces of the gear case are pump mounting portions for mounting hydraulic pumps which may be added as appropriate.