Abstract: A device for the metered delivery of a viscous liquid has a pump body with a drill hole accommodating two pistons which connects a first chamber serving as an intake chamber and a second chamber serving as a discharge chamber. Two swivel arms driven by two cam discs are foreseen as the drive mechanism for the back and forth movement of the two pistons. For the metered delivery of an adhesive which contains flakes of silver the drill hole is designed such that it serves for guiding the pistons as well as for sealing the pump path.

Abstract: According to the invention, discharge noise from rotary vacuum machines having complementary profiles is attenuated by interposing between the discharge from the primary pump and the outlet to the atmosphere, a transfer device having independent cavities, e.g. cavities on a rotor rotated on a shaft, the cavities moving sequentially from the discharge to the outlet while simultaneously providing isolation between the discharge and the outlet. This achieves dynamic attenuation of the noise in a manner that is particularly simple and low cost, while also being very effective in suppressing discharge noise.

Abstract: A lubricant pump having a housing equipped with outlets and a lubricant chamber, and having a piston axially displaceable in an axial cylinder bore in the housing by means of an electrical drive arrangement. The piston is at a first end and has an axial outlet. A first portion of the axial outlet is connected to a through-opening arranged radially on the piston position and adapted in a predetermined piston position to connect the axial outlet to a predetermined outlet of the outlets. A second portion of the axial outlet of the piston is connected to the lubricant chamber by way of an inlet and a non-return valve to allow the bore to be filled with lubricant. The outlets are arranged essentially in succession to one another. The position sensor is adapted to signal the position of the piston in the event the piston stops.

Abstract: A pump includes a cylinder, a piston assembly, a first nozzle, a valve, a controller, a ring and a second nozzle. The cylinder defines first and second chambers and first and second channels for communication between the chambers. The piston assembly is received in the first chamber. The first nozzle defines a channel. The valve is received in the first chamber. The controller defines an axial channel and a radial channel communicated with the axial channel, and is received in the second chamber and linked to the valve through the second channel. The controller is movable between a first position for allowing the valve to seal the second channel and a second position for driving the valve to open the second channel. The ring is mounted on the controller so as to divide the second chamber into a first portion for communication between the first channel and the channel of the first nozzle and a second portion for communication between the second channel and the radial channel of the controller.

Abstract: A pump housing assembly includes a housing, a hub portion, and a flange. The housing has an end cowling defining a transition from a central portion of the housing to a transverse end portion. The hub portion extends longitudinally outwardly from the transverse end portion of housing. The flange extends radially outwardly from the outward end of the hub and is in spaced longitudinal relation to the end of the cowling to create a space to receive a head of a mounting bolt. The flange has an outer periphery with a pair of tangentially extending slots having an open end. The space for receiving a head of a mounting bolt is less than the length of a shank of a mounting bolt, to minimize the length of the housing. The slots have a width sufficient to receive the movement of a shank into and out of the open ends of the slots.

Abstract: A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positively pressurized bellows, a relatively balanced pressure bellows free of sliding seals, and a multi-orientable labyrinth. Each of these motor protectors also may have various moisture absorbents, filters, particle shedders and various conventional motor protector components.

Abstract: In an operation control apparatus of a compressor, a current, a voltage an d a TDC, etc. applied to a compressor are detected, a speed and a TDC are constantly controlled so as to place an operation point of the compressor within a high efficiency operation region by using a phase difference between each detected values (for example, a phase difference between the current and the voltage), and an operation frequency is varied according to a load variation, accordingly an operation efficiency of the compressor can be improved.

Abstract: A miniature air compressor includes a motor, a compression cylinder, a lower valve seat, an upper valve seat, and a noise suppression cylinder. Thus, the miniature air compressor may provide a stable pressurized air flow whose noise and impurity may be eliminated by the noise suppression cylinder, thereby enhancing the usage effect of the injection pen device. In addition, the miniature air compressor has a simple construction, may be assembled and amended easily and conveniently, and may reduce the cost of production.

Abstract: In an axial piston pump, a plurality of reciprocating pistons are at least partially positioned within a barrel. The barrel includes a ring shaped high pressure collection cavity that is positioned between the piston chambers and the outlet of the pump. In order to minimize potential loses due to leakage from the ring shaped collection cavity, the barrel is made from a casting that utilizes a ring shaped core supported in a mold. This facilitates the formation of the ring shaped cavity while insuring location and dimensional tolerances, and assisting in the latter machining of the casting to its final form.

Abstract: In an electromotive compressor of an air-conditioner for use in an automobile, an interior space of a container of a compressor is divided into a space including a compression mechanism portion and an electric motor portion, and an oil storage space, wherein an oil passage is provided in a lower portion while a partition having a gas passage in an upper portion thereof, and a gas emission pipe is provided in one of the two (2) spaces at the oil storage portion side, being divided by the partition plate, while an oil supply pipe in the other, thereby making an opening of the oil supply pipe dipped within the lubricating oil even when a car declines.

Abstract: Motor speed, motor amps, float position and elapsed run time are monitored to determine whether a sump pump is in a normal condition, a jammed condition, an inadequate pumping rate condition, a dry running condition or a stuck float condition. A processor is configured to increase the motor speed in response to an inadequate pumping rate condition, and to rapidly energize the motor clockwise and counterclockwise in response to a jammed condition or a stuck float condition. The processor provides signals to a display for displaying information about the condition that the pump is in. The pump is set up to receive power from either an AC power source or a battery power source. Availability of the AC power source is monitored and the pump is switched to operate from the battery power source when AC power is unavailable.

Abstract: A vacuum pump including two gas friction pumps arranged parallel to each other and having each at least one stage having an inlet communicating with a common suction region and an outlet communicating with a separate discharge region, a multi-stage pump arranged downstream of the two gas friction pumps, connection conduits for communicating the separate discharge regions with a common discharge chamber, and a conduit for communicating the common discharge chamber with the suction chamber of the downstream pump.

Abstract: A cruciform pump comprises a casing, a positioning round disk in the casing; a driven rotary disk; and two sliding blocks. A center of the positioning round disk is arranged corresponding to a center of the casing, and has a cruciform sliding groove. The driven rotary disk is eccentrically installed on the positioning round disk. One rotary shaft at one surface of the rotary disk protrudes out of the casing. The two sliding blocks are installed in the cruciform sliding groove. Each block is conformed to the sliding groove, so that the positioning round disk is driven by the sliding blocks. When the driven rotary disk rotates through two circles, the positioning round disk only rotates through one circle. During rotation, the two sliding blocks move along the cruciform sliding groove; then, one side of the sliding block presses fluid flowing out, and another side thereof will suck fluid into the sliding groove.

Abstract: A compressor for providing automatic capacity modulation is disclosed. The compressor comprises a compression chamber, a compressing member, a reexpansion area, a flow passage, a valve member, and a biasing member. The flow passage is in fluid communication with the compression chamber and the reexpansion area. In one position, the valve member permits flow through the flow passage and in a second position it prevents flow. The valve member is subjected to a first operating condition of fluid on one side and a second operating condition of the fluid on the other side. The biasing member exerts a biasing force on the valve member. When the first operating condition reaches a predetermined point relative to the second operating condition, the valve member moves and effects a change in the capacity of the compressor.

Abstract: A blower includes a casing for receiving a motor therein and the shaft of the motor extends through an opening in a top surface of the casing. A blade assembly is connected to the shaft and a cover is fixedly connected to the top surface of the casing and has an air outlet. The blade assembly is enclosed by the cover. Two recesses are defined in an outer periphery of the casing and a handle is connected to one of the two recesses, and an air inlet is defined in an inside of the other recess of the casing.

Abstract: A micromechanical pump has a membrane (2) positioned above a substrate (1). The substrate is provided with a cavity (8) which is formed in an endlessly continuous shape (e.g., circular) to provide a channel for a drive fluid. A cover (9) is positioned above the substrate with the membrane being between the substrate and cover. The cover is provided with an inlet (11) and outlet (10). Electrodes (3, 4) are provided around the floor of the cavity. The electrodes are selectively actuated so as to attract selected areas of the membrane resulting in a gap forming between the cover and the selected areas of the membrane. The areas of the membrane above the non-selected electrodes form a seal with the cover. By selectively actuating the electrodes a peristaltic pumping action results in a pumped fluid traveling from the inlet, through the gaps and out the outlet.

Abstract: Inverted peristaltic pumps and related apparatus/methods wherein one or more compressible pump tubes are formed or mounted on a core member and one or more tube compressing members move about the core member so as to compress the tube(s) and propel a fluid through the tube(s). The core member may be removable and the pump tube(s) may be pre-mounted on the core member to form a disposable or reusable tubing cartridge. The core member or tubing cartridge may be easily inserted into and removed from the pump. In some embodiments troughs or grooves may be formed on the core member and the tube(s) may be disposed in such troughs or grooves.

Abstract: A pump comprises a chamber with an inlet and an outlet. A first heating element is located in proximity with the inlet, and a second heating element is located in proximity with the outlet. The first and second heating elements are configured when heated to form a bubble within the chamber. By controlling the first and second heating elements, fluid is expelled from the pump.

Abstract: An electromagnetic device includes a core and a coil in the space between a central section and an outer section of the core and spaced inwardly of an open side of the core such that the coil is completely recessed within the core. An armature, facing and aligned with the recess in the core is being movable towards and away from the coil. A pair of springs on the opposite ends of the core, and coaxial with the longitudinal axis of the core, mount the armature for straight-line reciprocatory movements parallel to the longitudinal axis of the core such that during the movement of the armature: (a) a recess in the armature receives the central section of the core; (b) the outer surface of the armature defines a first working gap with the inner surface of the core outer section; (c) and the inner surface of the armature at the recess defines a second working gap with the outer surface of the core central section.

Abstract: An electric pump includes a cylinder, a pumping element, a cap and a spring. The cylinder defines a space and at least one aperture in communication with the space and includes a first end defining an aperture and a second end defining an opening. The pumping element is received in the cylinder for pumping air through the aperture defined in the first end of the cylinder, the space and the at least one aperture. The battery includes a first electrode and a second electrode, and is received in the cylinder so that the first electrode is in electric connection with the pumping element. The cap is engaged with the second end of the cylinder. The spring is attached to the cap. The spring is in electric connection with the pumping element. The cap includes an OFF position where the spring is off the second electrode and an ON position where the spring is in connection with the second electrode. A tubular joint is secured to the first end of the cylinder.