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| Number | Title | Issue Date |
| 7785084 | Method and apparatus for elimination of gases in pump feed/injection equipment A pumping apparatus for pumping a liquid from a source to a target includes a pump having a pump housing and a pump piston. The pump housing defines a central longitudinal bore, a transverse bore communicating with the central bore for conveying a liquid through the... | 08/31/2010 |
| 7708535 | Systems and methods for providing a dynamically adjustable reciprocating fluid dispenser Systems and methods for providing a dynamically adjustable, synchronously and/or asynchronously reciprocating fluid dispenser. A pump drive motor is coupled to the reciprocating fluid pump to actuate a pump shaft within a pump cylinder, wherein the pump shaft includ... | 05/04/2010 |
| 7648349 | Nutating pump with reduced pulsations in output flow A nutating pump is disclosed which has a modified piston and housing or casing that provides two distinct pump chambers or areas. Output from the first pump chamber is delivered during a first half of the dispense cycle or the piston movement cycle. A substantial po... | 01/19/2010 |
| 7318416 | Liquid fuel pump A liquid fuel system for an internal combustion engine includes a fuel supply line, a fuel pump connected to the supply line and having an outlet to a carburetor or a liquid fuel injector. A mechanical contact between the pump and a component of the internal combust... | 01/15/2008 |
| 7207780 | Multiple port dual diameter pumps A multiple port, dual diameter piston fluid dispensing pump which includes multiple input and output ports accessed by rotating at least one of the pistons and a dual or multiple diameter piston or set of pistons that cooperate so that they follow each other. The di... | 04/24/2007 |
| 7165531 | Negative rate shaping torque capsule A negative rate shaping torque capsule is provided that effectively reduces torque rise of the engine. The device is part of the mechanical governor and allows fuel control rack position to decrease as engine speed decreases, thus reducing the amount of fuel deliver... | 01/23/2007 |
| 7159507 | Piston pump useful for aerosol generation A piston pump delivers precise and repeatable volumes of a fluid from a reservoir to a downstream component, and includes a piston that is rotatably and reciprocally mounted within a cylinder. The outer periphery of the piston forms an interference fit with the inne... | 01/09/2007 |
| 7134851 | Reciprocating pump having a ceramic piston Various embodiments of the invention, therefore, provide pumps, and methods for their production. One exemplary embodiment of the invention comprises a ceramic plunger pump assembly. The pump assembly can include a pump body, which defines a pump chamber with an inl... | 11/14/2006 |
| 7056307 | Weight dependent, automatic filling dosage system and method of using same The invention concerns a syringe for administering medication to an animal. The syringe includes a handle that may be manually actuated to dispense medication to the animal. The syringe also includes a valve that controls the flow of medication both into and out of ... | 06/06/2006 |
| 7011469 | Piston joint A joint for positioning between first and second elements includes an outer member and an inner member. The first and second elements are arranged for linear motion along a common axis. The outer member is configured for movement relative to the first and second ele... | 03/14/2006 |
| 6949025 | Downhole motor universal joint assembly A downhole motor universal joint assembly includes a female coupler which receives a male end of a drive shaft. The female coupler has a retainer that prevents separation of the male end and the female coupler. The retainer has a rearward extending skirt with flow p... | 09/27/2005 |
| 6925973 | Piston engine assembly A variable compression piston assembly includes a plurality of pistons, a transition arm coupled to each of the pistons, and a rotating member mounted for pivoting movement to slide along an axis of the drive member. Movement of the rotating member relative to the d... | 08/09/2005 |
| 6915765 | Piston engine assembly A variable compression piston assembly includes a plurality of pistons, a transition arm coupled to each of the pistons, and a rotating member mounted for pivoting movement to slide along an axis of the drive member. Movement of the rotating member relative to the d... | 07/12/2005 |
| 6913447 | Metering pump with varying piston cylinders, and with independently adjustable piston strokes A metering pump includes an actuating mechanism, and a plurality of piston cylinders coupled to the actuating mechanism. A first of the cylinders has a working volume that differs from a second of the cylinders. The actuating member is centrally located and the cyli... | 07/05/2005 |
| 6575078 | Fluid motor having fluid actuated advancing elements to advance an advanceable part of the fluid motor relative to a stator part of the fluid motor A fluid motor includes a plurality of fluid actuated pistons 13 extending radially outwards from a stator and each having a cam follower bearing 14 at its outer end. A rotor surrounds the stator and includes an inwardly facing drive cam profile engaged by... | 06/10/2003 |
| 6540486 | Fluid dispensers A fluid dispense system having a computer control system that operatively controls a stepper motor driving a nutating pump. The stepper motor actuates the nutating pump piston through partial revolutions. The computer control system determines the number ... | 04/01/2003 |
| 6318974 | Oil pump for separate lubrication The invention provides a compact oil pump for separate lubrication having no back gear with the rotation of an engine as a driving source even when the engine is reversely rotated. In the oil pump for separate lubrication, a distributor is fitted to a cyl... | 11/20/2001 |
| 6042341 | Suction nozzle operated with compressed air A suction nozzle operated with compressed air is used to generate vacuum in hollow spaces connected on the suction side. Two cylindrical nozzle bores (1, 2) that are coaxial to one another, through which a compressed air flow flows, which are separated by... | 03/28/2000 |
| 5961304 | Injection pump for diesel-cycle internal combustion engines An injection pump for diesel-cycle internal combustion engines includes a casing (1), a cylinder (6) within the casing and communicates, via at least one radial aperture (51), with a fuel intake chamber (3), and a piston (7) sealedly slidable within the c... | 10/05/1999 |
| 5863187 | Two position rotary reciprocating pump with liquid displacement flow adjustment A rotary reciprocating pumping apparatus is provided with a positive two position adjustment feature which allows the piston stroke to be increased to a maximum and repeatably, automatically, returned to a second calibrated dispensing position. Such rotar... | 01/26/1999 |
| 5741126 | Valveless metering pump with crisscrossed passage ways in the piston A valveless positive displacement pump with a closed end cylinder has fluid inlet and outlet ports adjacent to the closed end. A piston is reciprocally and rotatively driven in the cylinder. The piston is provided with crisscrossed helical slots formed th... | 04/21/1998 |
| 5601421 | Valveless double acting positive displacement fluid transfer device A valveless, double acting, positive displacement fluid transfer device is operable either as a pump when driven by a power source, or as a motor when the fluid working portion is driven by fluid under pressure through the inlet and outlet ports of the de... | 02/11/1997 |
| 5597051 | Lubricating oil supply unit for two-cycle engines A lubricating system for a machine such as a two-cycle internal combustion engine including a reciprocating pump that pumps a finite amount of lubricant during a single pumping stroke and a stepper motor for operating the pump through incremental phases o... | 01/28/1997 |
| 5575261 | Fuel injection pump for internal combustion engines The invention relates to a fuel injection pump for internal combustion engines with a pump plunger (18), a drive shaft (11) for the actuation of the pump plunger (18) and a rotational-angle sensor (30) for detecting the angular position of the drive shaft... | 11/19/1996 |
| 5494420 | Rotary and reciprocating pump with self-aligning connection A self-aligning connection between a rotary and reciprocating pump piston allows relative radial movement between the pump piston and the rotary cam. The self-aligning connection is formed by a pin carried by the rotary cam and is positioned in a radial r... | 02/27/1996 |
| 5482448 | Positive displacement pump with concentrically arranged reciprocating-rotating pistons A valveless positive displacement pump having pistons that undergo both rotating and reciprocating motion. The assembly comprises a radially outer, ported first cylinder with an axially outer, closed off end, a radially intermediate combination element ha... | 01/09/1996 |
| 5474430 | Fuel injection pump A fuel injection pump of the distributor type for a multicylinder internal combustion engine has a pump piston that both rotates and is driven in the lifting direction for generating a fuel injection pressure in a pump work chamber, and a magnet valve tha... | 12/12/1995 |
| 5472320 | Displacement piston pump A displacement piston pump has a drive shaft that is driven by a rotating motor. The pump includes a piston which is axially movable within a cylinder and is connected to a piston guide shaft. The drive shaft and the piston guide shaft are rotatably coupl... | 12/05/1995 |
| 5411382 | Oil pump, more particularly for a chain saw The claimed invention is an oil pump (18), more particularly for a chain saw (100). The oil pump has a cylindrical pump chamber (20) constructed in a pump housing (19). The pump housing has an intake slot (21) and an outlet slot (23). A pump piston (25) i... | 05/02/1995 |
| 5342178 | Coolant gas guiding mechanism in compressor A coolant gas guiding mechanism in a compressor is disclosed. A plurality of pistons reciprocate within corresponding cylinder bores that are formed around the rotary shaft, inside a casing. Each piston defines a working chamber in the corresponding cylin... | 08/30/1994 |
| 5312233 | Linear liquid dispensing pump for dispensing liquid in nanoliter volumes A rotary/reciprocating liquid dispensing pump for dispensing liquids in the nanoliter range has a narrow radial slot extending longitudinally from an end of a reciprocating, rotating cylindrical piston sliding in a smooth cylindrical bore of a pump housin... | 05/17/1994 |
| 5286173 | Coolant gas guiding mechanism in swash plate type compressor The housing of a swash plate type compressor includes a suction chamber and a discharge chamber. A plurality of cylinder bores are formed in a cylinder block connected to the housing. A plurality of pistons in corresponding cylinder bores are provided suc... | 02/15/1994 |
| 5246354 | Valveless metering pump with reciprocating, rotating piston A valveless metering pump includes a simultaneously reciprocating and rotating piston. The pump head includes radially spaced coplanar ports for drawing and dispensing fluids as the piston rotates sequentially past the ports. The reciprocating stroke of t... | 09/21/1993 |
| 5239957 | Two cycle engine for small boat A number of embodiments of lubricating systems for small watercraft that might become inverted and wherein a lubricant reservoir supplies lubricant under gravity to a lubricant pump when the water pump is operating in a normal upright condition. An air re... | 08/31/1993 |
| 5236314 | Oil pump device for a chain saw An oil pump device for a chain saw comprises a drive unit having a drive shaft and a gear fixed to the drive shaft and meshing with a worm gear fixed to a power output shaft of an engine. The oil pump device also comprises a pump unit having a pump casing... | 08/17/1993 |
| 5224846 | Fuel injection pump for internal combustion engines A fuel injection pump for internal combustion engines, having a reciprocating pump piston that is guided in a cylinder liner, having a control slide that is axially displaceable on the pump piston, inside a lateral recess of the cylinder liner, and is mov... | 07/06/1993 |
| 5217356 | Fuel injection pump A fuel injection pump that provides an improved fuel injection cutoff spill rate at high fuel pressures without degrading the mechanical strength or durability of a control sleeve that is provided with a spill port and fits over the plunger of the pump, a... | 06/08/1993 |
| 5167181 | Fluid transfer devices A positive displacement fluid transfer device is disclosed which may be operated either as a fluid pump, compressor or motor with no modification. The device is based mechanically upon axial cylinder and plunger hydraulic devices using a swash plate to re... | 12/01/1992 |
| 5165851 | Fuel injection pump There is disclosed an improved cam for a fuel injection pump. The cam has a mountain-like cam projection at its surface disposed in contact with a roller. The cam projection has a lift region extending from a leading end thereof to a peak thereof. At the ... | 11/24/1992 |
| 5158441 | Proportioning pump A valveless positive displacement pump including a closed end cylinder having two fluid inlet and outlet ports adjacent the closed end. A piston reciprocably and rotatably driven in the cylinder and including a reduced area portion on one free end which c... | 10/27/1992 |
