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Pumps > Expansible Chamber Type Expansible Chamber TypeExpansible Chamber Type patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.07/19/07 - 20070166180 - Compact vacuum pump A vacuum pump capable of pumping solid, liquid and gas, or any combination thereof, including a drive (40) and a manually disengageable pumping system connected thereto. The pumping system is composed of a two- or three-chambered canister (1, 18, 21) within which solids, liquids, and gases can be separated from ... 07/12/07 - 20070160484 - Booster-type gas compressor A booster-type gas compressor comprises a compressed-gas flow path, a cylinder, and a piston that moves up and down in the cylinder to further compress a compressed gas fed into the cylinder from the compressed-gas flow path. In a crank case, a crank shaft is rotated with a driving shaft ... 06/21/07 - 20070140878 - Hydraulically-actuated diaphragm pump with a leak compensation device A diaphragm pump including, in a pump body, a hydraulic control chamber disposed between a piston for executing reciprocating motion and the diaphragm, the pump including elements for compensating leaks from the hydraulic chamber, the elements including a refilling duct opening out into the hydraulic chamber via a normally-closed compensation ... 06/14/07 - 20070134112 - Button diaphragm piston pump A system, method, and process of using a button diaphragm for a piston pump are provided. The button diaphragm is a thin sheet of material with a raised bead located on its periphery. The button diaphragm also has a button with a button face and a relief. The button is ... 06/07/07 - 20070128058 - High-pressure pump A plunger is inserted into a slide hole of a cylinder body provided between a pressurizing chamber and a drive cam, so as to reciprocate within the slide hole. The drive cam and a coil spring move the plunger toward the drive cam so that fuel is sucked into the ... 05/31/07 - 20070122301 - Drywall mud pump An improved capacity mud pump is achieved by lengthening the link between the piston and the pump handle in such a way that each stroke of the handle moves the piston farther, thus transferring more mud per stroke. Reconfiguration of the output aperture of the pump by attaching a high ... 05/24/07 - 20070116583 - Fuel supply pump The present invention provides a fuel supply pump which is suitably used in a booster-type accumulator fuel injection device and a tappet structural body which is suitable for the fuel supply pump. For this end, in a fuel supply pump which includes a plurality of plunger barrels, plungers and tappet ... 04/05/07 - 20070077157 - Air compressor having improved valve device An air compressor includes a cylinder housing having an outlet tube, a piston slidably received in the cylinder housing and having a piston rod and a bore, and a motor coupled to the piston for moving the piston relative to the cylinder housing in a reciprocating action, in order to ... 09/28/06 - 20060216171 - Hand held pump A hand held vacuum and pressure pump has a fixed handle, with a movable handle pivotally connected thereto at one end thereof, the fixed handle being fixed to a pump cylinder so as to be perpendicular thereto. A spring loaded piston rod extends from the movable handle through the fixed ... 06/08/06 - 20060120906 - Structure and the manufacturing method for friction parts on concrete pump The present invention relates to a sliding motion structure for a concrete pump that can reduce the extent of abrasion and solve the problem of high maintenance expenses resulting from frequency replacement of the sliding motion structure by fabricating friction areas with a plurality of wear-resistant friction blocks, and to ... 05/18/06 - 20060104842 - Pump unit There is provided a pump unit including: a pump shaft operatively connected to a driving source; a cylinder block rotatably driven by the pump shaft; a piston unit accommodated in the cylinder block in a slidable manner in an axial direction; a movable swash plate oscillatable on an operational axis ... 03/16/06 - 20060057008 - Vacuum processing apparatus The invention provides a highly reliable plasma processing apparatus having stable sealing performance. The vacuum processing apparatus comprises a vacuum vessel having its inside decompressed; an opening disposed in a wall of the vacuum vessel for communicating the inside with the outside thereof and through which a sample to be ... 03/09/06 - 20060051224 - Pusher fire pumper tanker (the cannon pump) A fire extinguisher pumper tanker-a cylinder tank 1, includes extinguishing liquids filling in pipes 21, & combustion chamber 2 pushed piston 50 by burning force until the piston hits & stopped by the surround front cover 4, the piston push the extinguishing liquids, throw the buffer object 36, throw the ... 03/09/06 - 20060051223 - Hydrotransformer The invention is based on a hydraulic transformer having a housing and having an expeller part in which a plurality of expellers which bound a number of expeller spaces with variable volumes are guided, a cam part on which the expellers are supported, and a valving surface which has three ... 03/02/06 - 20060045780 - Outlet check valve for fluid bladders A manually operated pump having a pump assembly and a check valve. The pump assembly includes a dome with a fluid inlet. A support plate is sealed to the dome to define a fluid chamber. The support plate includes a fluid outlet. A foam material is positioned in the fluid ... 03/02/06 - 20060045779 - High-pressure generation apparatus Disclosed is a high-pressure generation apparatus, which comprises a pair of columnar-shaped anvils disposed in opposed relation to one another to define a pressure-generating space therebetween. The anvils are adapted to be applied with a load therebetween to generate a high pressure in the pressure-generating space. Each of the anvils ... 03/02/06 - 20060045778 - Priming pump for a circuit subjecting said pump to an outlet pressure greater than an inlet pressure The invention provides a priming pump comprising a deformable envelope associated with an inlet endpiece and an outlet endpiece each fitted with a moving valve member, the endpieces being arranged in such a manner that when the valve members are in the closed position, the outlet endpiece presents a leakage ... 02/09/06 - 20060029503 - Plunger pump and method of controlling discharge of the pump There are provided a plunger pump and method of controlling discharge of the pump capable of obtaining a desired compression rate, changing a discharge amount with ease without changing a stroke of the plunger and/or the inner diameter of a sliding hole of the plunger, and discharging a constant amount ... 01/19/06 - 20060013716 - Shape memory alloy wire driven positive displacement micropump with pulsatile output Apparatuses and methods for pumping fluid are disclosed. An exemplary apparatus is a miniature pump that includes a shape memory wire that obtains a plastic condition below a transformation temperature and has a memorized shape such that the shape memory wire produces a work stroke by returning to the memorize ... 01/19/06 - 20060013715 - Crimped piston to rod joint A method for assembling a piston on a rod, and resultant piston and rod assembly, uses one or more lock rings that are mechanically deformed radially inwardly into respective locking grooves in the rod, thereby axially locking the lock ring to the rod. The lock ring can function as an ... 12/29/05 - 20050287027 - Hydraulic fluid reservoir and hydraulic system A hydraulic fluid reservoir and hydraulic pump combination has at least one hydraulic fluid port and includes a container with a hollow body having a top and a conduit having a bottom within the container and a top above the bottom. The conduit has an opening adjacent to the bottom ... 12/29/05 - 20050287026 - Low density counterweight for eccentric driven pump An eccentric for balancing the piston of an eccentric driven pump has a counterweight portion with a relatively low density between 0.07 lbm/in3 and 0.2 lbm/in3, preferably less than 0.1 lbm/in3. ... 12/15/05 - 20050276708 - Pump inlet manifold A reciprocating piston/plunger pump inlet manifold includes an elongated cylindrical manifold member closable at opposite ends by transverse end caps connected to the manifold member by releasable couplings. A rubber or polymer liner formed with nitrogen filled closed cells is disposed within the manifold member. Spaced apart fluid discharge guide ... 12/15/05 - 20050276707 - Draw back pump A piston pump dispenser having a reciprocating piston pump arrangement which, in a dispensing stroke, dispenses fluid from an outlet and, in a charging stroke, to draw fluid from a reservoir also draws back fluid from the outlet through which fluid is dispensed in the dispensing stroke. ... 12/01/05 - 20050265868 - Fluid actuator A fluid actuator configured for achieving extended cycle life and reduced overall actuator height. The actuator may include a nesting arrangement between portions of the actuator to reduce overall height and provide stability. The actuator may also join movable members and include a guidance mechanism to avoid undesired contact between ... 11/17/05 - 20050254977 - Hermetic compressor and refrigeration unit A hermetic compressor comprises a hermetic container, an electric motor and a compressing mechanism installed inside of the hermetic container, lubricating oil and refrigerant gas enclosed within the hermetic container, a first temperature detector disposed to a predetermined location within the hermetic container, and a second temperature detector disposed to ... 10/27/05 - 20050238513 - Double piston for a compressor A double piston for a compressor, having an elongated piston carrier which has one piston on each end, and having a connecting rod, extending approximately parallel to the piston carrier, that is supported rotatably by means of a bearing on a bolt of the piston carrier and spaced apart from ... 10/27/05 - 20050238512 - Apparatus for fluid storage and delivery at a substantially constant pressure Microfluidic pumps, methods of fabrication thereof, and methods of use thereof, as well as method of pumping a fluid, are disclosed. ... 09/22/05 - 20050207921 - Opposing pump/motors Two motors are arranged on opposing sides of a common shaft, drive plates of the pump/motors being rigidly coupled to each other, for example by being in hard contact with opposing sides of the shaft. By providing hard contact between the pump/motor drive plates and a common shaft, the drive ... 09/22/05 - 20050207920 - Sealed type compressor In the present invention, resonance chamber (128) is isolated from the inside of the hermetic container due to a seal portion having flange (118) disposed at suction muffler (110) and groove (129) formed in cylinder head (123), and the suction pressure pulsation hardly leaks into the hermetic container, thereby enabling ... 09/01/05 - 20050191193 - Air compressor for tire inflating combination An air compressor device includes a piston slidably engaged in a cylinder housing and having an outer peripheral groove formed by a base peripheral surface and two side surfaces, to form an outer opening and an inner recess, a motor is coupled to the piston to move the piston in ... 08/18/05 - 20050180868 - System and method for power pump performance monitoring and analysis A power pump performance analysis system includes a signal processor connected to pressure sensors for sensing pressures in the cylinder chambers and inlet and discharge piping of a single or multi-cylinder pump. Pump speed and piston position are determined by a crankshaft position sensor. Pump vibration, fluid temperatures, and power ... 08/11/05 - 20050175486 - Compressor Reciprocating compressor including a piston mounted to reciprocate inside of a cylinder for drawing a working fluid into an inside of the cylinder, compressing, and discharging the working fluid to an outside of the cylinder, a connecting rod connected between a crank shaft and the piston for converting a rotating ... 08/11/05 - 20050175485 - Hydraulic driving system of construction machinery A hydraulic drive system has directional flow control valves (10a-f) for selectively supplying a hydraulic fluid, inflow control valves (201-203) disposed respectively in branch lines (150A-C) branched from a supply line (100) for supplying a hydraulic fluid to rod pushing-side chambers (5aA, 5bA, 6A, 7A) of hydraulic cylinders. A bypass ... 08/04/05 - 20050169784 - Force provider for a mover assembly of a stage assembly A force provider (232A) for a stage assembly (220A) includes a provider housing (238A) and a piston assembly (240A). The provider housing (238A) defines a piston chamber (344), and includes a first beam aperture (352F), a first cylinder aperture (350F) that is in fluid communication with a fluid at a ... 07/07/05 - 20050147513 - Method and apparatus for delivering pressurized gas This invention relates to an apparatus for pressurizing a fluid and delivering a gas comprising a pump, an accumulator and a heater such that the pump pressurizes a quantity fluid received from a fluid store and delivers that pressurized fluid to an accumulator. The accumulator then delivers a quantity of ... 06/30/05 - 20050142012 - Rodder pump A closed loop rodder pump is disclosed which can include a tube assembly and a reciprocating cylinder assembly disposed therein. The cylinder assembly can include a piston portion and a plunger. The piston portion can sealingly engage the tube assembly. In some embodiments, the cylinder assembly can include a second ... 06/23/05 - 20050135951 - Fluid dispenser member characterized in that the differential piston is formed integrally with an inlet valve moving member (138; 238; 338) which co-operates with an inlet valve seat (1161; 2161; 3161). ... 06/23/05 - 20050135950 - Oscillating piston machine The invention relates to an oscillating piston machine, comprising a housing which has an essentially spherical housing inner wall, four pistons which rotate together about an axis of rotation which is approximately in the center of the housing being arranged in the housing in which case, of the four pistons ... 06/16/05 - 20050129543 - Compressor assembly with reciprocating piston and vented cylinder A compressor assembly including a cylinder block defining first and second cavity portions. A central axis extends through first and second cavity portions. A compressible fluid respectively enters and exits the first cavity portion through an inlet and outlet. A piston is reciprocatingly disposed along the central axis and includes ... ### FreshPatents.com Support |