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| Number | Title | Issue Date |
| 8147225 | Pump valve having a limiting element The invention concerns a pump having a housing; a working chamber located in the housing for delivery of a fluid; a suction channel which is in flow connection with the working chamber for guiding the fluid into the working chamber; a valve unit disposed in the suct... | 04/03/2012 |
| 8123505 | Reciprocating pump with sealing collar arrangement An objective is to provide a reciprocating pump kept from lowering its performances, while restraining the cost from increasing. Collars 14, 20, 21 made of a material more excellent in resistance to corrosion than a manifold 3 are interposed bet... | 02/28/2012 |
| 8092198 | Fuel pump for internal combustion engine A fuel pump includes a pump housing having a compression chamber. A plunger is axially movable in the pump housing for pressurizing fuel in the compression chamber. A discharge valve is configured to open to supply fuel from the compression chamber to an internal co... | 01/10/2012 |
| 8079837 | Compressor Compressor (1) having a region of pressure intermediate between discharge pressure and suction pressure (especially, crank chamber (10)), characterized in that a valve mechanism (21) is provided for introducing discharge gas into the region of i... | 12/20/2011 |
| 7857605 | Inlet throttle controlled liquid pump with cavitation damage avoidance feature A liquid pump includes an electronically controlled throttle inlet valve to control pump output. With each reciprocation cycle, a plunger displaces a fixed volume of fluid. When less than this fixed volume is desired as the output from the pump, the electronically c... | 12/28/2010 |
| 7431575 | Auto valve priming pump A priming pump for fluid delivery arranged with a base defining a flow inlet, a flow outlet, and a control valve positioned therebetween. The priming pump includes a housing assembled to the base with an inlet flow valve positioned in an inlet valve compartment and ... | 10/07/2008 |
| 7399169 | Compressor The invention provides a compressor that can reduce occurrence of vibration and noise due to self-induced vibration of an suction valve at the time of a low flow rate surely with an inexpensive structure. In the compressor according to the invention, an opening regu... | 07/15/2008 |
| 7387221 | Fluid discharge pumping apparatus A fluid discharge pumping apparatus includes: a drive mechanism; a cylinder; an outflow valve mechanism and an inflow valve mechanism coupled to the cylinder; a piston member inside the cylinder; and a piston-supporting member attached to the piston member driven by... | 06/17/2008 |
| 7377756 | Rapid exhausting mechanism in pump unit A diaphragm is provided in a pump case so as to define a pump chamber communicated with an external member having an air chamber. A motor actuates the diaphragm to introduce air to the air chamber. An exhaust valve exhausts air in the pump chamber to lower a pressur... | 05/27/2008 |
| 7378271 | Device for pressurized perfusion especially for culturing and/or treating cells The invention relates to a device for pumping a fluid into a bioreactor. Polsatile pumping is made possible by valve arrangement so that growth of the cells in the bioreactor is increased. Pumping function can be achieved though several mechanisms. A piston can be d... | 05/27/2008 |
| 7361315 | Micro-reactor for biological substance inspection and biological substance inspection device The object of the present invention is to provide a micro-reactor, equipped with a high-precision liquid feed system of simple structure, capable of high-precision analysis of at least one item. The present invention provides a micro-reactor for biological substance... | 04/22/2008 |
| 7350538 | Method of preventing inadvertent inflation of an inflatable prosthesis A pump assembly for a penile implant is provided having a mechanism which prevents spontaneous inflation of the cylinders implanted within the user. The preventative mechanism uses overpressure generated by the reservoir during unintentional compression to effective... | 04/01/2008 |
| 7341435 | Fluid end A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number... | 03/11/2008 |
| 7335002 | Fluid end A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number... | 02/26/2008 |
| 7331773 | Pump provided with exhaust valve device and hemodynamometer incorporating the same A diaphragm is provided in a pump case so as to define a pump chamber communicated with an external member having an air chamber. A motor actuates the diaphragm to introduce air into the pump chamber and to supply the introduced air to the air chamber. An exhaust va... | 02/19/2008 |
| 7290561 | Pulsation causing valve for a plural piston pump A valve for causing pulsatile flow in a multi-piston plunger pump includes a valve poppet, a valve seat, and a spring biasing the valve poppet against the valve seat; and a mechanism holding the valve poppet in an open position, thereby producing pulsatile flow from... | 11/06/2007 |
| 7278443 | Pulsation causing valve for a plural piston pump A valve for causing pulsatile flow in a multi-piston plunger pump includes a valve poppet, a valve seat, and a spring biasing the valve poppet against the valve seat; and a mechanism holding the valve poppet in an open position, thereby producing pulsatile flow from... | 10/09/2007 |
| 7278838 | Inlet check valve with removable seat An inlet check valve is mountable to a valve body that, in turn, is mounted to a high pressure pump. The inlet check valve has a removable inlet seat with a first through-hole forming an inlet path and functioning as a valve seat. A valve is positionable over the fi... | 10/09/2007 |
| 7228935 | Attachment pin for an exhaust-gas muffler The invention relates to an attachment pin (1) for fixing an exhaust-gas muffler (2) in an apparatus part (4) of a portable handheld work apparatus (5) driven by an internal combustion engine. The exhaust-gas muffler (2) includes e... | 06/12/2007 |
| 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 sealing relationship and a second displacement pump having check valves. ... | 05/15/2007 |
| 7214040 | Cylinder head arrangement for a piston compressor The invention relates to a cylinder head arrangement for a piston compressor, particularly for a hermetically enclosed refrigerant compressor, with a valve plate, a suction gas channel, a discharge chamber and a retainer element for a discharge valve. It is endeavou... | 05/08/2007 |
| 7214039 | Integrated ratio pump and check valve apparatus A pump apparatus is provided which comprises a plurality of displacement pumps each connected to a check valve apparatus. The displacement pumps each comprises a reciprocating piston within a housing having an interior wall spaced apart from the piston. The check va... | 05/08/2007 |
| 7210912 | Reciprocating piston compressor having improved noise attenuation A reciprocating piston compressor having a suction muffler and a pair of discharge mufflers to attenuate noise created by the primary pumping frequency in the primary pumping pulse. The suction muffler is disposed along a suction tube extending between the motor cap... | 05/01/2007 |
| 7201881 | Actuator for deformable valves in a microfluidic device, and method A combination is provided that includes a microfluidic device and a pivoting actuator. Methods of using the combination are also provided. The microfluidic device can include deformable valves that can be opened, for example, by the pivoting actuator. ... | 04/10/2007 |
| 7198759 | Microfluidic devices, methods, and systems Microfluidic assemblies, systems, and methods are provided for manipulating fluid samples. Assemblies include an elastically deformable cover layer and a less elastically deformable substrate. The methods include deforming the substrate through the cover layer so th... | 04/03/2007 |
| 7186383 | Miniaturized fluid delivery and analysis system An apparatus providing a fluidic cartridge including a first and second substrate and an intermediate interlayer is disclosed. The intermediate interlayer is sealedly interfaced between the first and second substrates to form therein a plurality of channels of capil... | 03/06/2007 |
| 7135147 | Closing blade for deformable valve in a microfluidic device and method A microfluidic manipulation system is provided that includes a blade for manipulating deformable material and at least one movable support that is capable of moving the blade into contact with a microfluidic device including a deformable feature. When the microfluid... | 11/14/2006 |
| 7114929 | Reciprocating pump and check valve In a reciprocating pump, drive power of a drive-power supply member is transmitted to a diaphragm within a diaphragm drive chamber via operating fluid. An operating-fluid-flow regulation chamber for regulating the flow of operating fluid is located between the drive... | 10/03/2006 |
| 7083400 | Valve arrangement for a small hermetic compressor A suction and discharge valve arrangement for a small hermetic compressor of the type presenting a compression cylinder (1), which has an end closed by a valve plate (10) and which has a suction pipe (5) adjacent to the valve plate (10) a... | 08/01/2006 |
| 7074022 | Discharge valve assembly for reciprocating compressors A reciprocating compressor including cylinder block with a plurality of cylinder bores. A piston is positioned in each bore and mounted to move in response to the a crankshaft, causing each piston to reciprocate within the cylinder bore. The compressor further inclu... | 07/11/2006 |
| 7066722 | Discharge valve for compressor A compressor assembly including a compressor mechanism, a compression chamber and a discharge chamber. A discharge port provides fluid communication between the compression chamber and the discharge chamber. A valve seat circumscribes the discharge port. A discharge... | 06/27/2006 |
| 7063516 | One-way valve A double diaphragm pump including an air manifold, two air chambers to either side of the air manifold, two pump chambers to either side of the air chambers and diaphragms extending between the air chambers and pump chambers are stacked together in horizontal assemb... | 06/20/2006 |
| 7059344 | Discharge valve mechanism for variable displacement compressor A discharge valve mechanism has a plurality of discharge openings. The discharge openings are placed in an open or closed state by a plate-like valve element. Each of the discharge openings is formed at a respective location between a base end side and a leading end... | 06/13/2006 |
| 7004734 | Reciprocating refrigerant compressor An inlet port 15 is divided into a plurality of holes 15a, 15b, 15c, 15 by ribs 61a, 61b, 61c. For example, when liquid refrigerant is compressed within a compression c... | 02/28/2006 |
| 7001156 | Structure of an air inflation device An improved structure of an air inflation device is disclosed. External air is drawn to the motor and cylinder to provide rapid cooling so that the efficiency of the motor is maintained. In the present invention, a plurality of air filters is used to filter air. The... | 02/21/2006 |
| 6986649 | Micropump with integrated pressure sensor An exemplary system and method for manufacturing micropump systems having integrated piezoresistive sensors is disclosed as including inter alia: a substrate, an inlet channel, an outlet channel, a pumping cavity, a first valve for permitting fluid flow from the inl... | 01/17/2006 |
| 6948920 | Toilet bowl and tank drainage device A hand held an portable pump has a housing with an inlet on the bottom and an outlet on its side. A central tube extends up from the housing and has a bulb attached at its end. An inlet gate is positioned proximate the inlet to operate between a closed position in w... | 09/27/2005 |
| 6921253 | Dual chamber micropump having checkvalves A micropump has two chambers separated by an actuator for causing fluid to flow in the chambers. Each chamber is equipped with a ball that acts as a valve for allowing flow in a desired direction. The balls are heavier than the fluid being pumped, and reside at an i... | 07/26/2005 |
| 6905318 | Compressor including tapered discharged valve and valve seat A compressor includes a compression chamber for compressing working fluid within an inside thereof, a discharge port, through which the working fluid flows out from the compression chamber, and a discharge valve for opening or closing the discharge port. The dischar... | 06/14/2005 |
| 6848893 | Compressor check valve A compressor check valve having a valve bolt and a valve bolt cover for noise reduction and mitigation of impact from a valve bolt on the valve bolt cover. A bolt insertion hole is provided in the cover to receive the valve bolt. A pressure conduction hole penetrati... | 02/01/2005 |
