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8172555 |
Diaphragm foam pump
A foam pump including a diaphragm made of a flexible material defining a mixing chamber and having an inlet and an outlet. An inlet passageway, having a one-way valve therein, is in fluid...
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8172549 |
Self-ventilating centrifugal pump
In order to ventilate a centrifugal pump (1) having a centrifugal pump outlet space (6) and a centrifugal pump suction space (4), as well as having an additional ventilation pump (3), preferably...
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8020399 |
High pressure mister fan cooling system
A high pressure mister cooling system having an electric fan, a high pressure pump mounted on the fan, an eccentric on the fan motor shaft, and mister nozzles mounted on the fan guard. A pump shaft...
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7909582 |
Vehicular oil pump control apparatus
A control apparatus for controlling two oil pumps which are provided on a vehicle wherein the two oil pumps are selectively driven by respective different drive power sources such that one of the...
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7845914 |
Self-priming fast fill sprayer pump system
A fast fill pump system for a self-propelled field sprayer includes high capacity centrifugal pump for tank filling. The centrifugal pump is connected in parallel with the fill connection and...
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7722332 |
Composite dry vacuum pump having roots rotor and screw rotor
Disclosed is a dry vacuum pump for evacuating a processing chamber in a semiconductor or display manufacturing device, or for evacuating gaseous substance and/or byproducts generated in the process...
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7550031 |
Cylinder filling oxygen concentrator
An energy efficient oxygen concentrator for filling high pressure portable cylinders with medical oxygen for use by ambulatory patients. Two compressors provide two pressurized air sources, one for...
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7488159 |
Zero-clearance ultra-high-pressure gas compressor
Gas compression system comprising a compression cylinder having a gas inlet, a compressed gas outlet, and one or more liquid transfer ports; a pump having a suction and a discharge; and a...
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7217105 |
Integrated pump and wash pump
A pump apparatus is provided which comprises a first displacement pump and a ceramic valve construction formed of a ceramic rotor, a ceramic stator having flat surfaces which are positioned in...
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7156922 |
Multi-chamber installation for treating objects under vacuum, method for evacuating said installation and evacuation system therefor
A multi-chamber installation (1) treats objects under vacuum. An evacuation system (5) is connected to a plurality of chambers (2, 3, 4). To reduce the complexity of the evacuation process, a...
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7121808 |
High frequency air pulse generator
An improved air pulse generator produces high frequency chest wall oscillations (HFCWO) and includes means for internal heat dissipation. Internal heat generated by an internal diaphragm motor is...
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6981855 |
Drilling rig having a compact compressor/pump assembly
A mobile drilling rig includes a platform mounted on drivable ground supports. Drilling equipment is disposed on the platform and is operated by a power system that includes hydraulic pumps, a...
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6960069 |
Arrangement structure of swash plate hydraulic pump hydraulic pump
An arrangement structure of a swash plate hydraulic pump which can be used in a wide range of construction equipment and industrial vehicles and is small in size, simple in structure, and...
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6857392 |
Aquarium pumping and airing apparatus
An aquarium includes a pump disposed in a chamber of a container to circulate water and having a spindle. An air supplying device is coupled to the spindle of the pump and driven by the spindle of...
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6846165 |
Hydrostatic machine
The invention relates to a hydrostatic machine (1) comprising at least one first hydrostatic unit (E1) and one second hydrostatic unit (E2), each hydrostatic unit (E1, E2) comprising respective...
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6824364 |
Master/slave pump assembly employing diaphragm pump
A master/slave pump assembly employs a dual diaphragm pump as the master pump. An abrasive fluid, such as a resin containing abrasive particles, can be pumped by the dual diaphragm pump without the...
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6793463 |
Tandem pump and interface for same
A method of assembling a tandem pump comprising first and second pumps connected in tandem by an interface. Each pump has a housing and an end cap containing hydraulic porting. The interface...
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6786701 |
High-pressure misting fan
A high pressure misting fan (10) configured for injecting a fluid (F) into a generated stream of air to produce a cooling vapor impregnated airstream (V) is disclosed. The fan (10) broadly includes...
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6776586 |
Multi-stage vacuum pump
The present invention provides a multi-stage vacuum pump which includes: a housing in which a plurality of pumping chambers are formed, the pumping chambers being arranged in series and being in...
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6722855 |
Oil pumping device
A manual/pneumatic oil pumping device having a housing defining therein an oil reserving space and an upper cover. A floating board is disposed in the oil reserving space. The upper cover is...
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6676384 |
Gas friction pump
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...
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6644931 |
System for pumping low thermal conductivity gases
In a vacuum pumping system according to the invention, the Roots or claw multistage dry primary pump discharges into an outlet stage including an additional piston or membrane pump connected in...
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6641370 |
Vacuum pump apparatus having improved sealing structure
The present invention relates to a vacuum pump apparatus which is capable of implementing a simple structure without a formation of an O-ring groove for engaging an O-ring therein, a lower...
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6629821 |
Pump apparatus
The present invention provides a multipurpose pump apparatus of high achievement, which can continuously pump and convey liquid even containing a large amount of foams and can make high level...
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6568913 |
Lubrication pump for a swash plate type compressor
A variable displacement swash plate type compressor which incorporates a lubricant pump coupled to one end of the drive shaft of the compressor, wherein the lubricant pump provides positive...
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6547527 |
Generator unit with clutch-driven pump
A portable power unit having an internal combustion engine, a tank for holding a supply of pressurized fluid, an electrical generator powered by the internal combustion engine, and a pump...
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6481976 |
Control valve and variable capacity type compressor having control valve
A variable capacity type compressor has a tiltable swash plate and pistons. A control valve is arranged to change the pressure in the crank chamber, to vary the capacity of the compressor by...
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6483105 |
Optically controlled actuator
A rotary actuator includes a motor operatively joined to a gear train having an output shaft. An optical encoder is operatively joined to the shaft of the motor for detecting rotation thereof. A...
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6454543 |
Selectively operable multiple pump assembly
The present invention relates to a space-saving and weight-saving motor-and-pump assembly which comprises a drive motor and a pump unit driven by the shaft of the said motor. In order to supply in...
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6409477 |
Vacuum pump
A vacuum pump including suction and discharge regions, two gas friction pumps arranged on opposite side of the suction region and parallel to each other and each having at least one stage and a...
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6382922 |
Grout pumps, control boxes and applicator tools, and methods for using the same
A grout slurry pumping system, and a grout slurry control box and associated tools are described. Methods of using the pumping system and control box are also described. The pumping system and...
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6309184 |
Temperature-responsive mobile shielding device between a getter pump and a turbo pump mutually connected in line
A temperature-responsive, mobile shielding device (10) is located between a getter pump (GP) and a turbo pump (TMP) being in line to each other, capable of providing a complete shielding to the...
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6299419 |
Reciprocating diaphragm pump with packless piston-cylinder unit
This invention provides a sealing mechanism for sealing the piston-cylinder unit of a reciprocating diaphragm pump to ensure that the piston-cylinder unit is permanently and reliably sealed while...
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6257835 |
Dry vacuum pump system for gas sorption analyzer
A vacuum pump system for creating a high vacuum (below 10-7 TORR) especially useful for vacuum volumetric measurements such as are performed using a gas sorption analyzer on a particulate sample to...
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6217289 |
Axial piston pump with auxiliary pump
An axial piston pump has a rotatable input shaft integral with a rotatable swash plate. A non-rotatable cylinder contains a plurality of axially movable pistons having spherical ends extending...
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6213726 |
Fuel pump module
A fuel pump module disposed within a vehicle fuel tank has a fuel pump therein to draw fuel from the fuel tank and deliver that fuel under pressure to the vehicle engine, and a jet pump driven by...
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6183209 |
Auxiliary pump means of an advance arrangement of a high pressure piston pump
An advance arrangement is described including an advance piston slidable within a bore and defining, with the bore, a control chamber. A restricted passage permits fluid to escape from the control...
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6164932 |
Aquarium pump for use both as an air pump and a water pump and aquarium apparatus with a passage aquarium
An aquarium pump for use both as an air pump and a water pump, includes an electromagnet, a diaphragm reciprocally driven by the electromagnet, an outer casing in which said electromagnet and said...
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6113354 |
Fuel delivery device
In a fuel delivery device for a motor vehicle a delivery pump (15) is provided in addition to a fuel pump (14). The delivery pump (15) serves to fill a surge baffle (5) and to drive a sucking jet...
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6113355 |
Pump drive head pump assembly with a hydraulic pump circuit for preventing back-spin when the drive head has been shut off
A pump drive head includes a housing, and a main shaft carried on upper and lower bearings disposed in the housing. The main shaft includes an outer torque tube and a liner tube. The outer and...
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6022198 |
Twin pump with a charging pump
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5938416 |
Liquid transfer apparatus having a plunger pump and a diaphragm pump for cleaning the plunger during its reciprocating motion
A liquid transfer pump includes a housing having an inner space, a cross head disposed in the inner space of the housing and attached to a driving mechanism to reciprocate inside the housing, a...
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5869774 |
Device for taking a liquid sample
Apparatus for taking up liquid batches, comprising a take-up tube (10), a metering pump (20) for drawing liquid into the take-up tube by suction, and a washing pump (30) which functions to pump...
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5868550 |
Pump assembly
A pump assembly, comprising a pump with a chamber having a vacuum region therein, a priming fluid reservoir, a suction line for fluid communication between the vacuum region and a fluid source, and...
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5848538 |
Oil and refrigerant pump for centrifugal chiller
A single motor drives both oil and refrigerant pumps in a refrigeration chiller, the motor and oil pump being disposed in the chiller's oil supply tank and the refrigerant pump being disposed...
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5775881 |
Oil supply system
The present invention relates to an oil supply system with at least one pressure and/or volume dependent controllable pump (1) and an oil tank (5) or the like from which the pump draws oil and...
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5655889 |
Combined variable volume air pump and peristalic pump
A combined constant-speed, variable-volume, piston-type air pump and peristalic pump. The air pump has a "minimum gap", i.e., has a piston head which is closely adjacent to the cylinder head at the...
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5636972 |
Device for extrusion of two component synthetic resins
A device for the extrusion of two component or two-part synthetic resins, in particular in underground mining and tunnel construction, which essentially consists of an extrusion pump in the form of...
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5591011 |
Multi-refrigerant compressor
The oil sump and suction plenum of a hermetic compressor are in continuous fluid communication through an oil equalization port assembly. Additionally, communication is established between the oil...
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5586875 |
Assembly of rotary hydraulic pumps
A first pump includes inner and outer intermeshing rotors, the outer rotor formed with external gear teeth. A second pump includes inner and outer meshing rotors, the outer rotor of the second pump...
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