72 results about "Positive displacement pump" patented technology

The invention discloses a planetary structure type flexible gear ring diaphragm pump, and belongs to the technical field of pumps, the planetary structure type flexible gear ring diaphragm pump comprises a pump body, a motor assembly is arranged in the pump body, an output shaft of the motor assembly is connected with a sun gear, a plurality of planetary gears are rotatably connected in the pump body, a flexible gear ring is arranged in the pump body, and the planetary gears are meshed and matched with the sun gear and the flexible gear ring. A fluid chamber seat is fixed at the end part of the pump body, a three-dimensional diaphragm is fixed in the fluid chamber seat, a plurality of flexible diaphragm chambers are arranged in the three-dimensional diaphragm along the outer circumferential direction of the flexible gear ring, and one-way valve groups are arranged on the flexible diaphragm chambers; planetary transmission and the positive displacement pump principle are combined, controllable deformation of a flexible component is used for replacing a traditional rigid connecting rod or eccentric wheel mechanism, and a brand-new internally-balanced driving mode is provided for fluid conveying; compared with a traditional eccentric wheel driving diaphragm pump, stress of the planet wheels on the two sides is always in internal balance, the running stability and reliability are greatly improved, and the motor cost is optimized.

A material calculator for a truck to deliver a predetermined quantity of brine per mile driven by the truck for a known route of miles independent of and proportional to truck speed, wherein the truck carries a known number of gallons of brine and a known number of pounds of salt. The material calculator has a processor accepting entry values of route miles to be driven, number of times the route of miles is to be driven, number of gallons of brine carried by the truck, and the number of pounds of salt carried by the truck. The processor has software for calculating dispensing of the brine and salt so that each is exhausted when the route is completed. A hydraulic pump pumps hydraulic fluid to a variable flow positive displacement pump to implement the calculated number of gallons of brine per mile to be dispensed for the known route.

An electric propulsion machine for propelling a boat. The electric propulsion machine includes a motor provided in an upper portion of the electric propulsion machine, a propeller shaft provided in a lower portion of the electric propulsion machine, a propeller provided in the propeller shaft, a drive shaft extending in an upper-lower direction and configured to transmit rotation of the motor to the propeller shaft, and a first non-positive displacement pump provided in the propeller shaft and configured to supply cooling water to the motor, the cooling water cooling the motor.

The present application relates to an American Society of Mechanical Engineers (ASME) Bioprocessing Equipment (BPE) compliant continuous stirred tank reactor (CSTR) array designed for continuous chemical, pharmaceutical, and biotechnological applications. Each array features two to five CSTRs incorporating a comprehensive recirculation and output flow system with a positive displacement pump, a three-way recirculation diverter valve, and control valves for precise management of output and waste allowing handling of solutions, suspensions, and mixtures of fluids, solids, and gases. Additional features support easy maintenance and real-time process monitoring, enhancing operational flexibility and control. This CSTR system is tailored to meet stringent industry standards and improve process efficiency.

This invention, entitled "An Built-in Power Device, a Dexterous Finger, and Its Applications," belongs to the field of robotic dexterous hand technology. The technical problems it aims to solve are: existing robotic dexterous fingers suffer from problems such as external power devices, complex structures, large size, low power density and slow response due to the need for reducers in motor drives, poor stiffness and easy wear of tendon-wire transmissions, large return gaps, unstable positioning and grasping, and difficulty in directly and effectively driving joint rotation through the micro-displacement of piezoelectric ceramics. The key technical solution is: a built-in power device consisting of a piezoelectric ceramic power system and a hydraulic transmission system. The piezoelectric ceramic utilizes its inverse effect to achieve direct electro-mechanical conversion, providing mechanical power to the hydraulic transmission system. The hydraulic pump in the hydraulic transmission system is a reciprocating positive displacement pump, which provides pressurized oil to the hydraulic circuit through the periodic change of the working chamber volume.

Embodiments of the present disclosure relate to techniques, processes, devices or systems for pump devices. In one approach, a wearable drug delivery device may include a reservoir configured to store a liquid drug, the reservoir including a housing including an outer wall defining an interior chamber, a sealing member, and a slit through the housing, wherein the sealing member is configured to seal the slit. The wearable drug delivery device may further include a delivery pump device including a drive mechanism coupled to the reservoir for driving the liquid drug out of the reservoir, the drive mechanism including a piston head disposed within the interior chamber of the housing, and a lead screw coupled to a drive nut, wherein the drive nut comprises a blade adjacent the piston head, and wherein the blade is positionable through the slit of the housing.

The positive displacement pump comprises a shell, two partition pieces, a main shaft, a pump set and a motor assembly, and the shell is provided with a liquid inlet and a liquid outlet; the two partition pieces are oppositely arranged, a mounting chamber is formed between the two partition pieces, the first partition piece and the shell form a liquid inlet cavity communicated with the liquid inlet, and the second partition piece and the shell form a liquid outlet cavity communicated with the liquid outlet; the main shaft is fixedly arranged between the two partition pieces, the pump set comprises an inner gear rotationally arranged on the periphery of the main shaft in a sleeving mode and an outer gear meshed with the inner gear, the inner gear and the outer gear are eccentrically arranged, the first partition piece is provided with a liquid inlet channel, and the second partition piece is provided with a liquid outlet channel. The liquid inlet, the liquid inlet cavity, the liquid inlet channel, the pump set, the liquid outlet channel, the liquid outlet cavity and the liquid outlet form a first fluid path; the motor assembly is arranged in the mounting chamber and comprises a rotor and a stator fixedly arranged in the mounting chamber, the rotor is arranged on the periphery of the outer gear and fixedly connected with the outer gear, and the structure of the pump is more compact.

Systems and methods for measuring stress in a rock mass using sleeve fracturing are provided. A system for measuring stress in the rock mass includes an expandable sleeve insertable into a borehole formed in the rock mass and operable to apply a radially outward force against a wall of the borehole by expansion of the sleeve. A positive displacement pump is operatively connected to the sleeve and is operable to deliver a liquid to the sleeve at a constant flow rate to cause expansion of the sleeve. A pressure sensor is operable to measure a pressure of the liquid. A pressure recorder is operatively connected to the pressure sensor for recording the pressure of the liquid.

To provide a washing machine capable of simply and efficiently washing powder and granular material such as nickel powder or slurry thereof with a small work load.SOLUTION: A filtering and washing machine for powder and granular material represented by nickel powder suitably having a mean particle size of 200nm or less produced by a liquid phase method or a slurry thereof includes a Buchner funnel 1, a positive displacement pump 4 suitably including a reciprocating pump such as a diaphragm pump connected to an extraction nozzle of the Buchner funnel 1 via a pipe 3, and a flexible hose 5 represented by a blade hose connected to a discharge side of the positive displacement pump 4, and is preferably mounted on a truck 6.SELECTED DRAWING: Figure 1

The present application relates to an American Society of Mechanical Engineers (ASME) Bioprocessing Equipment (BPE) compliant continuous stirred tank reactor (CSTR) array designed for continuous chemical, pharmaceutical, and biotechnological applications. Each array features two to five CSTRs incorporating a comprehensive recirculation and output flow system with a positive displacement pump, a three-way recirculation diverter valve, and control valves for precise management of output and waste allowing handling of solutions, suspensions, and mixtures of fluids, solids, and gases. Additional features support easy maintenance and real-time process monitoring, enhancing operational flexibility and control. This CSTR system is tailored to meet stringent industry standards and improve process efficiency.

This rotary compressor is provided with a casing (11), cylinders (41, 42) disposed inside the casing, pistons (61, 62) that rotate eccentrically inside the respective cylinders, a shaft (81) connected to the pistons (61, 62), and having a cavity (81a) inside, a pipe (85, 185, 285, 385) disposed inside the cavity (81a) and spaced from a wall of the cavity (81a), an upper bearing (32) disposed above the corresponding cylinder and pivotally supporting the shaft, a lower bearing (31) disposed below the corresponding cylinder and pivotally supporting the shaft, a rear muffler (34) disposed below the lower bearing, and a positive displacement pump (50) attached to the rear muffler to discharge oil between the pipe and the wall.

A tubing assembly is provided that can comprise a plurality of tubes or lumens that can be disposed within a head of a peristaltic pump. The tubing assembly can provide a flow rate or volume capacity that is generally equal to or greater than that achieved with a comparable prior art tube while operating at higher pressures than that possible using the prior art tube. Further, in accordance with some embodiments, the tubing assembly can achieve a longer working life than a comparable prior art tube, and the load on the pump motor can be reduced such that the pump life is increased and / or a larger pump motor is not required to achieve such advantageous results.

Systems are provided for an engine fuel delivery system for vehicles under test. In one example, a fuel delivery system includes a bulk fuel storage tank to house bulk fuel at low pressure and an on-board fuel tank to house smaller quantities of pressurized fuel to be fed to a vehicle propulsion system. The fuel delivery system further includes a positive displacement pump to pressurize fuel from the bulk fuel storage tank and feed fuel to the on-board fuel tank. A plurality of valves and sensors are further included with an arrangement of fuel lines to monitor and direct fuel flowing in the fuel delivery system.

Plug removal and installation tools and methods of operating such to remove suction port plugs and discharge port plugs from a fluid end on a pump (e.g., hydraulic fracturing positive displacement pump) and to insert new plugs are disclosed. The plug removal tool includes a reaction bar assembly, a drive assembly, and a threaded rod assembly. The plug removal tool may be operated by rotating the drive assembly using a high torque, powered impact tool to reduce the time, labor, and fatigue associated with manually removing plugs from a pump using a traditional manually operated plug removal tool. The drive assembly is rotatable independently of the threaded rod assembly and reaction bar assembly. Rotation of the drive assembly results in linear movement of the threaded rod assembly to extend and retract the threaded rod assembly relative to the drive assembly and reaction bar assembly.

A pump assembly for a dental cleaning appliance includes a positive displacement pump including a fluid chamber and a fluid displacement member which is moveable in a linear direction relative to the fluid chamber, and a drive for actuating the pump to draw fluid into the fluid chamber through a fluid inlet. An energy storage device converts kinetic energy generated during actuation of the pump by the drive into potential energy, and stores the potential energy. A cam is connected to the drive for rotation relative to the fluid displacement member. The cam has a ramp extending about the fluid displacement member which is engaged by a cam follower connected to the fluid displacement member. As the cam moves relative to the fluid displacement member, the cam follower moves along the ramp to actuate the pump to draw fluid into the fluid chamber, and beyond the end of the ramp to enable the energy storage device to use the stored potential energy to actuate the pump to urge fluid from the fluid chamber.

Method for operating a device (1) for providing a liquid additive, comprising at least one suction point (17) for extracting liquid additive from a tank (2), a valveless delivery line (6) extending from the suction point (17) to a delivery unit (3), and a valveless positive displacement pump (4), wherein the positive displacement pump (4) is configured to pump the liquid additive from the tank (2) via the suction point (17) along the delivery line (6) to the delivery unit (3), wherein the positive displacement pump (4) has at least one seal (19) of the delivery line (6) which can be moved along the delivery line (6) for pumping the liquid additive, comprising at least the following steps: a. Determining an operational stop of the device (1); b. Determining the position (45) of the seal (19) within the positive displacement pump (4); and c. Changing the position (45) of the seal (19) if the position (45) of the seal does not correspond to a designated parking position (44), wherein the positive displacement pump (4) has a rotary drive (8) and a movable pump element (9), wherein the movable pump element (9) is moved for conveying in accordance with a rotary motion (32), characterized in that barbs (40) are provided on the movable pump element (9) which can interlock when the movable pump element (9) is moved with a rotary motion (32) against the conveying direction (5) and the barbs (40) are locked in the park position (44) after step c).

Systems and methods described herein provide composite slug-bearings to support rotating shafts and provide for adaptable pump configurations in a positive-displacement pump. A main bearing surface is configured to make direct contact with the rotating shaft and may be in the form of a rolling element bearing, plain journal bearing, or flanged journal bearing. A slug houses the main bearing surface and serves to occupy volume within the pump housing. The slugs are also used to locate and / or position the bearing within the housing, which will position the shafts. Multiple composite slug-bearings may be interchangeably located within the gear chamber of a pump for proper shaft placement. The composite slug-bearings also affect the volumetric displacement of the pump. The size of the slug is selected to allow relatively smaller gears to operate within a relatively larger housing while still maintaining the minimal clearances that are required for positive-displacement machines.

The disclosed apparatus, systems and methods relate to fluid distribution systems. The fluid distribution systems being made up of a plurality of positive displacement pumps disposed on a fluid distribution manifold and proximate to the tank and the point of product discharge. The system optionally has a valve system for precision control of fluid discharge.

The disclosed embodiments relate to techniques, processes, devices, or systems for pump devices. In one approach, a wearable drug delivery device includes a reservoir configured to contain a fluid, the reservoir including a housing, the housing including an outer wall defining an interior chamber, and a drive mechanism for expelling the fluid from the reservoir. The drive mechanism includes a plunger received within the interior chamber of the reservoir, a lead screw extending from the plunger, and a clutch mechanism in threaded engagement with the lead screw. The clutch mechanism is configured to allow the lead screw to pass through the clutch mechanism when disengaged, and configured to grip the lead screw and rotate the clutch mechanism to advance the lead screw and the plunger into the reservoir when engaged.

The present invention relates to a smart integrated flow rate control-type positive displacement pump system to which smart control is applied by integrating a flowmeter function with a positive displacement pump, and a flow rate control method using same. The smart integrated flow rate control-type positive displacement pump system comprises: the positive displacement pump driven by a connected motor; a signal collector for collecting at least one motor signal of a PWM duty ratio, a current, and a voltage of the motor; a calculator that calculates a driving torque of the pump by receiving the motor signal from the signal collector, estimates the pressure of the pump through the calculated driving torque and the radius of the positive displacement pump, and calculates a flow rate through the calculated driving torque and the pressure of the pump; and a controller for controlling the motor to correspond to a required flow rate.

A positive displacement pump system can include a fluid end block, which can be configured to provide a pumping chamber and control a flow of a fluid through the positive displacement pump system. The fluid end block can include a first cylindrical wall defining a plunger bore extending partially through the fluid end block and a second cylindrical wall defining a fluid conveying cross bore that intersects the plunger bore defining a bore intersection rim. A portion of the first bore intersection rim can include a first toroidal surface.

The present invention relates to a positive displacement pump (100) for viscous materials, comprising at least one metering device (19) including a metering piston (3) movable in a sleeve (17), the at least one metering device (19) having a pre-compression stage occurring between a feeding stage and a conveying stage, the pre-compression stage being implemented by a stroke C of the metering piston (3) such that the internal pressure of the positive displacement pump (100) can be balanced to obtain the highest possible and most regular outlet flow rate.

1. Name of the designed product: end of a retaining member. 2. Use of the designed product: retaining member for fixing a component on a device, for example for fixing a component in a bore of a fluid end of a positive displacement pump; end of the retaining member for use as an assembly of the retaining member. 3. Design features of the designed product: in the shape. 4. Picture or photograph best indicating the design features: perspective view 1.

Gas agitation systems, components, and methods are provided for use during minimally invasive procedures. A fluid mover generates an alternating bi-directional fluid flow to agitate the gas within the body cavity of a patient, dispersing surgical plume from the surgical site. The gas agitation system may optionally include a filter to capture at least part of the surgical plume. The fluid mover may be isolated from the gas to mitigate or avoid contamination of at least the fluid mover. The fluid mover may be a reciprocating positive displacement pump. In some examples, a double-acting fluid mover or two fluid movers may be provided to generate a pair of alternating bi- directional fluid flows. The pair of alternating bi-directional fluid flows may be provided in antiphase.

A rotary compressor comprising: a casing; a cylinder disposed inside the casing; a piston eccentrically rotating inside the cylinder; a hollow shaft coupled to the piston and having an internal space; an upper bearing disposed above the cylinder and pivotally supporting the shaft; a lower bearing disposed below the cylinder and pivotally supporting the shaft; a rear muffler disposed below the lower bearing; and a positive displacement pump attached to the rear muffler and discharging oil into the internal space.

A fluid retention apparatus for a positive displacement pump used to transfer fluid from a supply to a target comprises (i) a sealing device configured to be received in a packing chamber of the pump and to matably receive a piston of the pump therethrough that reciprocates in a transfer chamber for generating suction and expulsion of the fluid for transference thereof, and (ii) a leak containment device configured to contain leaked fluid passed from the transfer chamber. The sealing device features a tubular body made of wearable and substantially deformation-resistant composite polymer material and the passageway which is shaped with opposite end portions of reduced diameter to form a sealing friction fit with the piston. The leak containment device features a cavity fluidically communicated with the sealing device's passageway and receiving the piston therethrough, and a drain port in fluidic communication with the cavity for releasing the leaked fluid.

An outdoor tool and an eddy current driven lubrication system are provided. The lubrication assembly may include a motor assembly, a drive disc, a driven rotor, a cam disc, and a positive displacement pump. The drive disk may be mechanically coupled to the motor assembly for rotation therewith. The driven rotor may be spaced apart from the drive disk. The driven rotor may include a support base and one or more magnetic elements secured to the support base for rotation therewith. The one or more magnetic elements may be magnetically engaged with the drive disc to generate an eddy current therewith. The cam disc may be attached to the support base for rotation therewith. A positive displacement pump may be in mechanical communication with the cam disc to actuate pumping of lubricant fluid based on rotation of the cam disc.

A rotary piston machine includes a casing and a rotor assembly, each with a hypotrochoidal. The rotor assembly includes apices that conform to the hypotrochoidal profile of the casing, and the relative motion of the casing and the rotor assembly create variable volumes. The variable volume allows the rotary piston machine to function as a compressor, an expander, an internal combustion engine, a positive displacement pump, or a fluid-driven motor.

A control system for a forced circulation water pipe steam generator, the control system including: a heat exchanger having an inlet and an outlet, the heat exchanger being positioned to be exposed to a heat source in use, the heat exchanger being capable of generating steam from water passing through the heat exchanger; a steam separator having a steam outlet, a water outlet, and an inlet connected to the outlet of the heat exchanger; a positive displacement pump connected to the water outlet of the steam separator and arranged to supply water and / or a mixture of water and steam to the inlet of the heat exchanger; a feedwater injector connected between the outlet of the heat exchanger and the positive displacement pump; and a flow meter connected between the water outlet of the steam separator and the inlet of the heat exchanger.

A positive displacement pump that triggers with the beating of a mammalian heart, through the monitoring of an ECG signal is disclosed. A programmable delay from the detection of the forthcoming contraction of the heart enables the pump to syncopate the ejection of the fluid with the events occurring in the cardiovascular system. This delayed ejection could be used to overlay the ejected fluid from the pump with a pressure wave in the artery of systemic circulation through a catheter connection between the pump and a physiological model (e.g., cow, dog, human). The outcome of this use could be to raise the pulse pressure in the system to take advantage of physiological pathways that respond to this transient change in blood pressure. The novelty of this system stems from the adaptable control architecture designed to augment the pulsatile characteristics of the cardiovascular system. This inventive concept could be expanded to encompass the augmentation (dampen or enhance) of pulsatile characteristics in any oscillating flow system.