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1010 results about "Pump chamber" patented technology

The ventricles are the pumping chambers of the heart. They are also called the discharging chambers because they are responsible in discharging the blood back to the body. On the other hand, the atria are the receiving chambers, which are responsible in receiving the blood from the body.

Vacuum pump to generate a negative pressure

A vacuum pump for generating a negative pressure includes a pump housing having a pump chamber with a rotor and a motor for driving the rotor with a drive shaft rotatable about a longitudinal axis, a first and a second inlet line. The second inlet line leads through the pump housing into the pump chamber. A first outlet line leads from the pump chamber through the pump housing. The pump has a first outlet valve and a second outlet line connected to the pump housing. A connecting part is attached to a connecting surface running circumferentially to the longitudinal axis, and the outlet valve with the second outlet line is formed in the connecting part. The connecting part further has the first inlet line, with a first connecting opening formed in the connecting part housing, via which the first inlet line is connected to the second inlet line.
Owner:GEBR BECKER GMBH

Pet water dispenser

A pet water dispenser includes a water tank for storing liquid, an upper cover installed above water tank and having a sink and a water leakage opening communicating with water tank in surface, a water pump extending into or onto upper cover from lower part of water tank and having a water supply opening in surface above upper cover; water pump includes a first accommodating chamber internally having a motor which drives pump blades below first accommodating chamber to rotate through a rotating shaft, second accommodating chambers of which walls define a pump chamber with downwards-extended wall of first accommodating chamber; a centrifugal water pump formed by pump blades in pump chamber and matched motor and including a water inlet communicating with water tank, and a water discharging opening; a water supply channel formed by second accommodating chambers sequentially communicating with water discharging opening and water supply opening.
Owner:DONGGUAN ZHIYIHONG HARDWARE & PLASTIC CO LTD

Vacuum pump

A vacuum pump, which is connectable to an external system and configured to evacuate material from the external system, includes a main housing defining a motor housing, a pump housing, and a partition wall that separates the motor housing and the pump housing. The pump housing is sealed relative to the motor housing to form a compression chamber that holds a lubrication fluid. The vacuum pump further includes a motor assembly that is positioned within the motor housing and a pump assembly that is positioned within the compression chamber. The pump assembly is driven by the motor assembly and is in fluid communication with the compression chamber. The pump assembly includes a pump chamber, a rotor having vanes that is driven within the pump chamber, and a seal that is in sliding contact with the rotor. The seal is moveable relative to the rotor.
Owner:MILWAUKEE ELECTRIC TOOL CORP

Circulation pump made from brittle material

Aspect of the disclosure provides a method of pumping a liquid material. The method may include pumping the liquid material by rotating an impeller attached to a shaft assembly. The pump includes the impeller, the shaft assembly, and a pump chamber. The method includes controlling the minimum pressure of the liquid material in the pump chamber to be above a threshold pressure by controlling a pressure of a gas that is supplied to the pump chamber. The shaft assembly includes a first shaft and a second shaft that are separated by a gap and are physically coupled by a coupling component.
Owner:FOURTH POWER INC

Medical treatment system and methods using a plurality of fluid lines

Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater element. Improvements are also disclosed in an application of negative pressure during a drain phase in peritoneal dialysis therapy, and to control an amount of intraperitoneal fluid accumulation during the therapy. Improvements in efficiency are also disclosed in movement of fluid into and out of a two-pump cassette and a heater bag of the peritoneal dialysis cycler, and in synchronization of operation of two or more pumps in the peritoneal dialysis cycler or other fluid handling devices using a multi-pump arrangement.
Owner:DEKA PRODUCTS LP

Minimizing drivetrain damage from bad discharge valves on positive displacement pumps

A pumping system, comprising: a pump fluid end comprising a plurality of pump chambers, each pump chamber comprising a bore having a reciprocatable plunger disposed therein, a suction valve, and a discharge valve; a prime mover mechanically coupled to the fluid end [by a drivetrain] and configured to reciprocate the plungers; and a controller communicatively coupled to the prime mover, the fluid end, or both and configured to alert a user re a pump malfunction, initiate corrective action of the pump malfunction, or both in response to: (a) an indication of torque reversal during operation of the pumping system, (b) an indication of negative flow rate from the pump during operation of the pumping system, (c) an indication of leakage of (i) a single discharge valve in a 3-plunger pump or (ii) discharge valves associated with two plungers in adjacent firing order, or (d) any combination of (a)-(c).
Owner:HALLIBURTON ENERGY SERVICES INC

Linear activated drug dosing pump system

A novel embodiment of a pump system, for example, of the type that would be used in a wearable drug delivery system, comprises dual linear-actuated plungers disposed in a pump chamber. The plungers are coupled to a leadscrew having both left-hand and right-hand threads such that rotation of leadscrew in a first direction moves the plungers together and rotation of leadscrew in a second, opposite direction moves the plungers apart. Movement of the plungers away from each other draws one or more doses of a liquid drug from a reservoir into the pump chamber, while movement of the plungers together forces liquid drug to a patient interface for delivery to the patient.
Owner:INSULET CORP

Pump cassette and methods for use in medical treatment system using a plurality of fluid lines

A fluid handling cassette, such as that useable with an automated peritoneal dialysis (APD) cycler device or other infusion apparatus, may include a generally planar body having at least one pump chamber formed as a depression in a first side of the body and a plurality of flowpaths for a fluid that includes a channel. A patient line port may be arranged for connection to a patient line and be in fluid communication with the at least one pump chamber via at least a first one of said flowpaths, and an optional membrane may be attached to the first side of the body over the at least one pump chamber. In one embodiment, the membrane may have a pump chamber portion with an unstressed shape that generally conforms to the depression of the at least one pump chamber in the body and is arranged to be movable for movement of the fluid in a useable space of the at least one pump chamber. One or more spacers may be provided in the at least one pump chamber to prevent the membrane from contacting an inner wall of the at least one pump chamber. The patient line, a drain line, and / or a heater bag line may be positioned to be separately occludable in relation to one or more solution lines that are connectable to the cassette.
Owner:DEKA PRODUCTS LP

Micromembrane pumping device

What is suggested is a micromembrane pumping device for pumping a fluid, having: a pump chamber to which an inlet valve, an outlet valve, and a membrane device for varying a volume of the pump chamber are associated, wherein the membrane device has a plate-shaped actuator for deforming the membrane device; and influencing means for influencing the plate-shaped actuator and the volume of the pump chamber; wherein the membrane device has a plate-shaped membrane body limiting the pump chamber; wherein the plate-shaped actuator is arranged on a side of the plate-shaped membrane body facing away from the pump chamber; wherein the plate-shaped actuator is mounted to and electrically insulated from the plate-shaped membrane body by an electrically insulating glue layer; wherein at least one embedded portion of a support body at or in which a deformation sensor for detecting a deformation of the membrane device is arranged, is arranged within the glue layer to detect the volume of the pump chamber; wherein the influencing means, the plate-shaped actuator and the deformation sensor form a closed-loop control circuit for regulating a volume flow.
Owner:FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV

Efficient vacuum energy-saving self-priming pump

The invention relates to the technical field of self-sucking pumps, in particular to an efficient vacuum energy-saving self-sucking pump which comprises a base, a first pump cavity, a motor, a rain baffle, a first impeller, a compensation assembly and a drainage assembly, the first pump cavity, the motor and the rain baffle are sequentially installed at the upper end of the base, and the first impeller is installed at the axis position in the first pump cavity; the drainage assembly is installed at the lower end of the first impeller, and the two compensation assemblies are installed in the drainage assembly. After the drainage assembly is started, the drainage assembly is used for guiding the liquid level to overflow the first impeller and removing large-particle solids in fluid, and the compensation assembly drives the first impeller to move downwards to reduce the gap when detecting that the gap between the first impeller and the inner wall of the first pump cavity is enlarged. The tip end of the blade is easily and continuously washed by solid particles, so that the flow and lift of the core pump are reduced, and the efficiency is obviously reduced.
Owner:JIANGSU ZHONGDIAN PUMP VALVE MFG CO LTD

Water environmental DNA collection apparatus

A water environmental DNA collection apparatus, including a lower box body and collection components, where a clear water chamber, a motor chamber, a water pump chamber and a power supply chamber are provided in the lower box body, a motor is provided in the motor chamber, a water pump is provided in the water pump chamber, the lower box body is fixedly connected with a first filtering mechanism, the water pump communicates with the first filtering mechanism, a support column is fixedly connected outside the lower box body, and a turntable is fixedly connected with the support column; and a plurality of groups of collection components are provided, each collection component includes a press filter, a cylinder and a bottom shell, a transverse plate is fixedly connected inside the cylinder, the cylinder is divided into a filter pressing chamber and a filtering chamber through the transverse plate.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI

Device and system for dispensing a liquid

PCT designated stage expiredWO2025114616A1Single-unit apparatusPump chamberInlet valve
The invention relates to a device for dispensing a liquid from a container, comprising: - an inlet channel configured to be brought in fluid communication with the container; - a pump in fluid communication with the inlet channel, the pump including a pump chamber and a piston reciprocally movable in the pump chamber; - an inlet valve arranged between the inlet channel and the pump; - a buffer in fluid communication with the pump; - a nozzle for dispensing the liquid, the nozzle in fluid communication with the pump and / or the buffer; - an outlet valve arranged between the pump and / or buffer and the nozzle; and - means for connecting the dispensing device to the container; wherein the buffer comprises an elastic buffer bag defining an expansible volume and extending at least partially past the connecting means towards an interior of the container. The invention further relates to a system for dispensing a liquid, comprising a container and a liquid dispensing device as described above connected thereto.
Owner:DISPENSING TECH

Parallel type multi-shaft roots vacuum pump

A parallel type multi-shaft roots vacuum pump comprises a motor, a pump body with N pump cavities connected in parallel, 2N fan blade rotors, 2N fan blade transmission gears, N-1 pairs of carrier gears and other parts, wherein N is an integer and is larger than or equal to 2, and the 2N fan blade rotors comprise a driving fan blade and 2N-1 driven fan blades. The parallel type multi-shaft roots vacuum pump is provided with N pump cavities connected in parallel, 2N fan blade rotors are installed in the pump cavities in parallel, a pair of fan blade rotors is arranged in each pump cavity to form N air suction and exhaust units, and the N pump cavities connected in parallel share an air suction port and an air exhaust port. The fan blade transmission gear is arranged at the other end of the motor, and the driving fan blade shaft is directly connected with the motor through a coupler. The parallel type multi-shaft roots vacuum pump is novel in structure, symmetrical and compact, smooth in air flow and large in air suction amount, and is perfectly presented in a unique and exquisite single-pump form. The technical scheme of the parallel type multi-shaft roots vacuum pump can be expanded and extended to the design of a screw vacuum pump.
Owner:ELIVAC CO LTD +1

Dispersing device

The invention discloses dispersing equipment. The dispersing equipment comprises a dispersing part and a driving part, the dispersing component comprises a rotating shaft, a dispersing machine and a centrifugal pump. The dispersion machine comprises a dispersion main body and a screen cylinder. And the dispersing main body is provided with a dispersing cavity for accommodating the screen barrel. The centrifugal pump comprises a pump shell and an impeller. The rotating shaft is sequentially and fixedly connected to the screen barrel and the impeller. The pump shell is provided with a pump cavity, a feeding port and a discharging port. The impeller is arranged in the pump cavity. The discharge hole is formed in the end part, far away from the dispersion machine, of the pump shell. The pump shell is provided with a side flow channel. And a discharge port is formed in the discharge end of the side runner. And the feeding end of the side runner and the feeding hole are oppositely arranged in the axial direction of the rotating shaft. And the feed port, the pump cavity, the side runner, the discharge port and the dispersion cavity are sequentially communicated and form a slurry runner. And the driving part is fixedly connected with the rotating shaft and is used for driving the rotating shaft to drive the screen barrel and the impeller to rotate, so that the control difficulty of the material retention time and the shearing strength is reduced, the consistency of material characteristics is improved, and the material dispersion quality is improved.
Owner:SHENZHEN SHANGSHUI INTELLIGENT CO LTD

Pump device

A pump device includes a motor having a rotor and a stator, and an impeller which is disposed in a pump chamber and is integrally rotated with the rotor. The rotor includes a rotor member having a first cylindrical part and a drive magnet surrounding the first cylindrical part. A radial bearing is held on an inner side of the first cylindrical part. The drive magnet has a second cylindrical part surrounding an outer periphery of the first cylindrical part and a ring-shaped rib which protrudes from an end of the second cylindrical part to an inner side. The rotor member has a seat part, which protrudes from the first cylindrical part to an outer side and supports an end of the second cylindrical part, and a caulked part which is enlarged from the first cylindrical part to an outer side and is overlapped with the ring-shaped rib.
Owner:NIDEC INSTR CORP

Piston pump for a high pressure cleaning device

A piston pump for a high-pressure cleaning device is provided, having a pump housing, which includes a first housing part and a second housing part. The first housing part forms a suction conduit and a pressure conduit, and the second housing part forms a plurality of pump chambers into each of which a reciprocally movable piston dips and which are each in flow connection with the suction conduit by way of an inlet channel and with the pressure conduit by way of an outlet channel. The inlet channel can be closed by an inlet valve and the outlet channel can be closed by an outlet valve. The second housing part includes a valve receptacle, and that the piston pump includes an outlet valve assembly, wherein the outlet valve assembly comprises an outlet part, which is inserted into the valve receptacle and forms all outlet valve seats.
Owner:ALFRED KARCHER SE & CO KG

Device and system for dispensing a liquid

PCT designated stage expiredWO2025144052A1Single-unit apparatusPump chamberInlet valve
The invention relates to a device for dispensing a liquid from a container, comprising: - an inlet channel configured to be brought in fluid communication with the container; - a pump in fluid communication with the inlet channel, the pump including a pump chamber and a piston reciprocally movable in the pump chamber; - an inlet valve arranged between the inlet channel and the pump; - a buffer facing the pump and in fluid communication therewith; - a nozzle for dispensing the liquid, the nozzle in fluid communication with the pump and / or the buffer; and - an outlet valve arranged between the pump and / or buffer and the nozzle; wherein the buffer comprises an elastic buffer bag defining an expansible volume and extending at least substantially in alignment with the pump chamber. The invention further relates to a system for dispensing a liquid, comprising a container and a liquid dispensing device as described above connected thereto.
Owner:DISPENSING TECH

Diaphragm pump

A diaphragm pump, which comprises a pump body which defines internally at least one pair of pumping chambers which are connected, at the inlet, to at least one suction connector and, at the outlet, to at least one delivery connector of the pump; pumping chambers are delimited by respective diaphragms, which separate the pumping chambers from actuation chambers, which can be connected, alternately, to a source of compressed air; in the pump body an access opening to the pilot chamber is defined which is closeable by means of a closure element; the closure element comprises a main body made by molding and of plastic material and at least one plate-like element made of a material having, with respect to the sliding pad, a higher resistance to wear and a lower coefficient of friction than the plastic material.
Owner:PIUSI SPA

Medical treatment system and methods using a plurality of fluid lines

Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater element. Improvements are also disclosed in an application of negative pressure during a drain phase in peritoneal dialysis therapy, and to control an amount of intraperitoneal fluid accumulation during the therapy. Improvements in efficiency are also disclosed in movement of fluid into and out of a two-pump cassette and a heater bag of the peritoneal dialysis cycler, and in synchronization of operation of two or more pumps in the peritoneal dialysis cycler or other fluid handling devices using a multi-pump arrangement.
Owner:DEKA PRODUCTS LP

Medical treatment system and methods using a plurality of fluid lines

Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater element. Improvements are also disclosed in an application of negative pressure during a drain phase in peritoneal dialysis therapy, and to control an amount of intraperitoneal fluid accumulation during the therapy. Improvements in efficiency are also disclosed in movement of fluid into and out of a two-pump cassette and a heater bag of the peritoneal dialysis cycler, and in synchronization of operation of two or more pumps in the peritoneal dialysis cycler or other fluid handling devices using a multi-pump arrangement.
Owner:DEKA PRODUCTS LP

Reverse driving impurity type magnetic drive pump

The invention relates to the technical field of magnetic pumps, and discloses a reverse driving impurity type magnetic pump which comprises a pump chamber, a water inlet, a water outlet and an impurity removal channel are formed outside the pump chamber, an impeller is arranged in the pump chamber, and the impeller is connected with an inner magnetic rotor shaft and is connected with an outer magnetic rotor shaft through a motor to drive rotation. Liquid in the water inlet axially flows into the pump chamber, a suction chamber is arranged in the water inlet and is a conical barrel with the cross section area gradually and uniformly shrunk, an inducer is arranged on the side, facing the water inlet, of the impeller, the inducer and the impeller coaxially rotate, the installation angle of blades of the inducer is small, and flow channels between the blades are long and wide. And the number of the blades is 2-4.
Owner:LIULIU PUMP TECH (JIAXING) CO LTD

Sea water pump

The invention provides a sea water pump, and relates to the technical field of water pumps, the sea water pump comprises a pump shell, the pump shell is provided with a water inlet, a pumping chamber and a water outlet which are communicated in sequence, and the water inlet is perpendicular to the pump shell and detachably connected with a water inlet elbow; one end of the transmission shaft extends into the pumping chamber, and the other end rotationally penetrates through the bearing body to be connected with a driving motor; the main impeller is mounted on the transmission shaft and close to the water inlet; the auxiliary impeller is installed on the transmission shaft and located between the main impeller and the pump shell. The blades on the main impeller are made of copper, and the blades on the auxiliary impeller are made of rubber. A plurality of main impeller screw holes are distributed in the main impeller; the water inlet is connected with a filter. Due to the arrangement of the main blade screw holes, dynamic balance is conveniently achieved, pressure impact on the main impeller is reduced, and the main blade screw holes are used as auxiliary holes during assembly and disassembly. And the water inlet is connected with a filter, so that the normal work of the main impeller and the auxiliary impeller is prevented from being influenced due to the fact that large-volume soft marine organisms enter the pumping chamber.
Owner:MECHANICS RES & DESIGN ACAD SICHUAN PROV +1

Pump body structure

The pump body structure comprises a pump shell, an air inlet assembly, an air outlet assembly and a plurality of pump covers, the pump shell comprises at least four shell plates and side plates which are sequentially connected in the circumferential direction, the at least four shell plates and the side plates jointly define a pump cavity, a cavity hole used for being communicated with the pump cavity is formed in each shell plate in a penetrating mode, and the pump covers are arranged in the cavity holes. The at least four shell plates comprise a first shell plate, a second shell plate, a third shell plate and a fourth shell plate; the air inlet assembly and the air outlet assembly are arranged on the side plate and are arranged at intervals; the multiple pump covers comprise the first pump cover and the second pump cover which are located on the first shell plate, the third pump cover and the fourth pump cover which are located on the second shell plate, the fifth pump cover and the sixth pump cover which are located on the third shell plate, and the seventh pump cover and the eighth pump cover which are located on the fourth shell plate. Each pump cover is provided with an air inlet hole and an air outlet hole.
Owner:SUZHOU KERUIDA INTELLIGENT TECHNOLOGY CO LTD

Flexible impeller pump

The flexible impeller pump comprises a pump body and a motor, the pump body comprises a pump shell, an impeller and two adapting pipes, a pump chamber is formed in the pump shell, the inner side wall of the pump chamber comprises an arc surface, an outer convex surface and two inner concave surfaces, the two ends of the arc surface are connected with one ends of the two inner concave surfaces respectively, and the other ends of the two inner concave surfaces are connected with the motor. An inlet connecting pipe and an outlet connecting pipe which are communicated with the pump chamber are arranged on the outer side wall of the pump shell, the two adapter pipes are in threaded connection with the inlet connecting pipe and the outlet connecting pipe respectively, the impeller is rotationally arranged in the pump chamber and abuts against the arc surface, the inner concave surfaces and the outer convex surface, and the motor is arranged on the pump shell. And an output shaft of the motor is connected with the impeller.
Owner:SHENZHEN HOBBYWING TECH CO LTD

Pump cassette and methods for use in medical treatment system using a plurality of fluid lines

A fluid handling cassette, such as that useable with an automated peritoneal dialysis (APD) cycler device or other infusion apparatus, may include a generally planar body having at least one pump chamber formed as a depression in a first side of the body and a plurality of flowpaths for a fluid that includes a channel. A patient line port may be arranged for connection to a patient line and be in fluid communication with the at least one pump chamber via at least a first one of said flowpaths, and an optional membrane may be attached to the first side of the body over the at least one pump chamber. In one embodiment, the membrane may have a pump chamber portion with an unstressed shape that generally conforms to the depression of the at least one pump chamber in the body and is arranged to be movable for movement of the fluid in a useable space of the at least one pump chamber. One or more spacers may be provided in the at least one pump chamber to prevent the membrane from contacting an inner wall of the at least one pump chamber. The patient line, a drain line, and / or a heater bag line may be positioned to be separately occludable in relation to one or more solution lines that are connectable to the cassette.
Owner:DEKA PRODUCTS LP

High-pressure cam pump with stable conveying flow

The invention relates to the technical field of ion chromatography detection, in particular to a high-pressure cam pump stable in conveying flow, which at least comprises a first pumping assembly, and the first pumping assembly comprises a pump head, a pump body, a plunger rod, a liquid inlet, a liquid outlet and a sealing assembly. A liquid inlet and outlet structure is improved, and a liquid outlet is formed in the tail end of a pump cavity, namely, the liquid outlet is formed in the contact position of the pump cavity and a sealing assembly, so that liquid is pumped out in a first-in first-out mode, namely, the sucked liquid is pumped out first, dissolved gas or air bubbles and the like in the liquid conveying process are removed in time, and the liquid conveying efficiency is improved. Meanwhile, the liquid outlet is formed in the position of the sealing assembly, bubbles accumulated for a long time at the position of the sealing assembly can be taken out in time when the liquid is pumped out, and after operation is carried out for a period of time, the conveying flow is stable and the precision is high; and compared with the situation of poor conveying flow precision, the improvement effect is remarkable.
Owner:QINGDAO ZHONGCHUANG SCI INSTR PUBLIC R & D SERVICE PLATFORM CO LTD

Novel liquid carrying prevention pressing pump

The utility model discloses a novel anti-liquid-carrying pressing pump which comprises a pump body and a pressing head, the pump body comprises a pump chamber, the upper end of the pump body is provided with a ventilation hole, a connecting rod is fixed below the pressing head, a pumping device is arranged in the pump chamber, the upper end of the pump body is fixedly provided with a lock cover, and a brake is arranged between the lock cover and the connecting rod. An angle limiting structure capable of limiting the rotating angle of the brake is arranged between the brake and the lock cover, a lifting structure capable of enabling the brake to ascend or descend when the brake rotates is arranged between the brake and the lock cover, and a sealing part is arranged on the brake. The pressing head is pressed down and is in threaded connection with the brake through the connecting rod to be locked on the brake, the brake is in a falling state, the sealing part blocks the upper end of the pump chamber to cut off communication between the ventilation hole and the pump chamber, and the solution is prevented from flowing out of the ventilation hole when the bottle is extruded or toppled. When the pressing head rotates and unlocks, the brake is driven to rotate and ascends to enable the sealing part to loosen the upper end of the pump chamber, so that the ventilation hole is communicated with the pump chamber for normal use of the pressing pump.
Owner:MAJESTY HLDG CO LTD

Pump fluid end with toroidal surface

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.
Owner:NAT OILWELL VARCO LP

Pumping mixing type pancreatic cancer postoperative drainage equipment

The invention relates to the field of medical instruments, and discloses a water pumping mixing type pancreatic cancer postoperative drainage device which comprises a negative pressure pump cabin, a liquid inlet and a liquid outlet are formed in the negative pressure pump cabin, the liquid inlet is communicated with a water inlet pipe and a first drainage pipe, the liquid outlet is communicated with a second drainage pipe, the end of the water inlet pipe is connected with a water supply tank, and the end of the second drainage pipe is connected with a liquid storage tank. A first overflowing cabin and a second overflowing cabin are formed in the negative pressure pump cabin, a first pipe cabin and a second pipe cabin are arranged between the first overflowing cabin and the second overflowing cabin in a communicating mode, and one-way valve structures are arranged at the connecting positions of the first overflowing cabin and the first pipe cabin and the connecting positions of the second overflowing cabin and the second pipe cabin. According to the device, the first drainage tube is placed in a wound surface, negative pressure is generated in the negative pressure pump cabin, the hydrops enters the liquid inlet along the first drainage tube under the action of the negative pressure and is mixed with water at the liquid inlet, the concentration and viscosity of the hydrops are reduced after the hydrops and the water are mixed, the situation that the hydrops are blocked in a pipeline due to high viscosity is reduced, and the anti-blocking effect is improved.
Owner:THE AFFILIATED HOSPITAL OF XUZHOU MEDICAL UNIV