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| Number | Title | Issue Date |
| 7963750 | Hydraulic pump A hydraulic pump comprises a moving pressing member to compress a lower reservoir to move downward, and to move upward according to the change of buoyancy by the supply and discharge of the water into an inner space of the moving pressing member. A pumping pipe tran... | 06/21/2011 |
| 7458786 | Oil well pumping unit and method therefor An improved oil well pumping unit and method thereof configured for use on new or existing oil wells. The present invention is for mechanical operation of the subsurface pump and replaces existing mechanical pumping units. The present invention multiplies input purc... | 12/02/2008 |
| 7406887 | Pumping unit with variable work stroke and return stroke torque factor characteristics A pumping unit system having vertical sampson post, a walking beam pivotally supported at the upper end of the sampson post and a horsehead affixed at a forward end thereof that supports a reciprocated sucker rod string, including a gear reducer mounted at selectabl... | 08/05/2008 |
| 7402028 | Pressurisation system A pressurization device is described mobilizing gravity to mobilize seawater and to employ a weight (56) for gravitionally applying a force to and thereby pressurizing an enclosed pocket (58) of seawater, resulting in low energy utilisation. Energy is ... | 07/22/2008 |
| 7267533 | Plunger assembly for use in reciprocating fluid pump employing reversing polarity motor A reciprocating pump includes a drive section and a pump section. The drive section has a reciprocating coil assembly to which alternating polarity control signals are applied during operation. A permanent magnet structure of the drive section creates a magnetic flu... | 09/11/2007 |
| 7198474 | Pump having shape memory actuator and fuel cell system including the same A pump having a linearly movable shaft, a rotatable hub operably connected to the shaft, and shape memory actuator operably connected to the rotatable hub, and a fuel cell system including the same. ... | 04/03/2007 |
| 6954040 | Method of controlling a reciprocating linear motor A free piston gas compressor comprising a cylinder, a piston reciprocable within the cylinder and a reciprocating linear electric motor derivably coupled to the piston having at least one excitation winding. A measure of the reciprocation time of the piston is obtai... | 10/11/2005 |
| 6926504 | Submersible electric pump An improved electrical pump is first provided for use in a wellbore. The pump comprises a stator and a stator housing, and an armature and an armature housing. The stator housing and the armature housing define concentrically nested tubular bodies. The armature hous... | 08/09/2005 |
| 6701908 | Apparatus for storing and discharging gas Apparatus for storing and discharging gas includes a housing having an inlet and an outlet. A floating differential piston is mounted to reciprocate in the housing and divide the housing into a storage chamber adjacent the housing inlet and a discharge ch... | 03/09/2004 |
| 6655224 | Downward offset barbell type walking beam compositively balance oil pump A downward offset barbell type walking beam compositively balance oil pump, in which at the rear end of the walking beam is mounted a downward offset barbell type balancing device consisting of a shoe plate, a cross shaft and balancing pieces, retains mos... | 12/02/2003 |
| 6631787 | Lubrication system A lubrication system for a vibratory apparatus such as a hydraulic striking device. The system includes a lubricant pump for pumping lubricant to one or more points of lubrication on the device and a drive for the pump powered in response to vibration of ... | 10/14/2003 |
| 6506030 | Reciprocating pumps with linear motor driver A reciprocating pump includes a cylinder with a closed interior compartment; a piston assembly which is moveably mounted within the compartment for reciprocating movement; a linear magnetic drive generates a linearly moving magnetic field for moving the p... | 01/14/2003 |
| 6386322 | Method and apparatus for oil well pumping A walking beam pumping system is disclosed wherein the pumping system's prime mover is gravity. In one embodiment, the system comprises a walking beam pivotally coupled to a support structure at a pivot point substantially central along the length of the ... | 05/14/2002 |
| 6203288 | Reciprocating pumps with linear motor driver A reciprocating pump includes a cylinder with a closed interior compartment. A piston assembly has a dispensing end and an opposed end and is moveably mounted within the compartment for reciprocating movement in opposed linear directions between opposed e... | 03/20/2001 |
| 6076516 | Portable oven air circulating device A air circulator for an oven includes a housing having inlet and outlet walls with openings in each wall for permitting air to pass through the housing. The air circulator further includes a fan assembly within the housing having a rotatable fan element a... | 06/20/2000 |
| 5988991 | Simplified energy transforming structure Disclosed is a simplified energy transforming structure which utilizes the weight of water stored at high position to pull up a heavy piston in a hydraulic cylinder, so that the piston can thereafter descend due to gravity and forces water flowing into th... | 11/23/1999 |
| 5941692 | Tuned resonant oscillating mass inflation pump and method of extracting electrical energy therefrom Disclosed is a tuned resonant oscillating mass pump, and particularly a pump structure and assembly which can be conveniently and readily mounted inside automotive tires for the purposes of maintaining optimum tire pressure and generating of electrical po... | 08/24/1999 |
| 5934882 | Electrical generator system having a tuned resonant oscillating mass A tuned resonant oscillating mass pump is shown, and particularly a pump structure and assembly which can be conveniently and readily mounted inside automotive tires for the purposes of maintaining optimum tire pressure and generating of electrical power ... | 08/10/1999 |
| 5707215 | Tuned resonant oscillating mass inflation pump and method of extracting electrical energy therefrom Disclosed is a tuned resonant oscillating mass pump, and particularly a pump structure and assembly which can be conveniently and readily mounted inside automotive tires for the purposes of maintaining optimum tire pressure and generating of electrical po... | 01/13/1998 |
| 5645056 | Variable volumetric inflatable pump A pump that can be adjusted to vary the volumetric output of the pump. The pump has a flexible housing that defines an inner pump chamber. The flexible housing can be collapsed by the user to discharge the contents of the inner chamber. Integral with the ... | 07/08/1997 |
| 5484268 | Positive displacement centrifugal pump A positive displacement centrifugal pump comprises (a) a pressure generating mass rotatable about a first axis and radially movable relative to it upon rotation of the mass, (b) a pumping unit, and (c) a flexible, non-elastic tensioning element operativel... | 01/16/1996 |
| 5346369 | Bilge pump actuated by wave motion A pump actuated by a reciprocal oscillating motion, the pump including a casing member enclosing an elongated substantially cylindrical chamber therewithin, a pair of flexible bellows disposed at the opposing distal ends of the chamber, each of the bellow... | 09/13/1994 |
| 5340283 | Water pumping apparatus utilizing produced compressed air A method and apparatus for producing compressed air includes sealing air in a container capable of reducing its volume by external hydraulic pressure. A weight having a larger specific gravity than water is attached to the container to sink the container ... | 08/23/1994 |
| 5297944 | Inflatable pump and article The disclosure relates to a collapsible flexible pump which includes an inflatable spring and framework. The inflatable spring framework is formed by attaching a layer of flexible material over selected exterior portions of the flexible material pumping c... | 03/29/1994 |
| 5205720 | Method and apparatus for producing compressed air and water pumping apparatus utilizing the produced air A method and apparatus for producing compressed air includes sealing air in a container capable of reducing its volume by external hydraulic pressure. A weight having a larger specific gravity than water is attached to the container to sink the container ... | 04/27/1993 |
| 5201968 | Tire pressuring and regulating apparatus Apparatus for harnessing and utilizing, inter alia, cyclic forces generated at a location eccentric from the axis of rotation of a rolling wheel. The apparatus may include, for example, pumps that can be attached to the valve stem of an automobile wheel i... | 04/13/1993 |
| 4990062 | Positive displacement pumps A positive displacement pump comprises a mass such as a liquid filled pressure chamber or an annular ring which is rotated at high speed about a first axis so that centrifugal force acting on the liquid or ring creates zones of differential pressure withi... | 02/05/1991 |
| 4842495 | Non throttling discharge pump assembly A pump assembly (1) for an atomizing piston pump comprising a piston (16) slidably located in a cylinder (4), a variable volume fluid storage chamber (5) in communication with the cylinder on one side of the piston, means (18) for varying the volume of th... | 06/27/1989 |
| 4799574 | Lubrication device A device for supplying a lubricant to a mechanism, particularly a rolling bearing, comprising a container for holding a quantity of lubricant and having at its lower end a discharge channel for the lubricant, and expulsion means disposed within the contai... | 01/24/1989 |
| 4679986 | Energy conserving refrigeration apparatus and method An energy-conserving refrigeration apparatus which employs a atmospheric pressure and vacuum-pressure actuated partial compressor for a refrigerant gas in combination with a conventional prime mover-driven compressor and also achieves lower compressor hea... | 07/14/1987 |
| 4595346 | Waterless urinal pumps Two flanged sleeves, closed and valved at one end, and a bonnet with two gudgeons act as a cylinder-piston mechanism for pumping. The upper sleeve is movable and spring-loaded, accepts and is filled with liquid. When the bonnet is depressed, through its g... | 06/17/1986 |
| 4568011 | Vacuum pump for desoldering gun A vacuum pump for a desoldering iron gun which comprises a cylinder closed at one end with a piston movable in the cylinder, and device including a valve connecting the closed end of the cylinder to the gun. A spring normally urges the piston away from th... | 02/04/1986 |
| 4557671 | Arrangement of connecting a diaphragm with an actuator rod in a diaphragm-operated device An improved arrangement for connecting a diaphragm and an actuator rod in a diaphragm-operated device, which is simple in construction and easy to assemble or disassemble. The arrangement includes a diaphragm of elastic material having a movable central p... | 12/10/1985 |
| 4449363 | Atmospheric pressure motor A magnet attracts succeeding sites distributed about the periphery of a disk causing the disk to rotate. The resulting centrifugal force pulls radially outwards a plurality of piston-like weights mounted on the disk lowering the pressure within a housing ... | 05/22/1984 |
| 4449894 | Centrifugal-reciprocating compressor A centrifugal compressor (50) includes at least one pair of cylinders (56 and 58) arranged in coaxial alignment and supported for angular displacement about a common axis of rotation (84) normally bisecting a common longitudinal axis of symmetry for the c... | 05/22/1984 |
| 4403539 | Arrangement for connecting a diaphragm with an actuator rod in a diaphragm-operated device An improved arrangement for connecting a diaphragm and an actuator rod in a diaphragm-operated device, which is simple in construction and easy to assemble or disassemble. The arrangement includes a diaphragm of elastic material having a movable central p... | 09/13/1983 |
| 4379388 | Ocean raft energy generator A system for generating electricity contained within an ocean raft. The raft has a series of raceways for heavy metal balls, and, as they roll back and forth, they engage levers which reciprocate back-to-back paired pistons in opposite directions. Each pr... | 04/12/1983 |
| 4278089 | Wound drainage device A device for removing fluids from a wound includes a housing and a passive bellows inside the housing. The bellows can be collapsed and retained in a collapsed or activated state. Upon release from its activated state, the bellows is expanded so as to pro... | 07/14/1981 |
| 4242053 | Free piston fluid energy transfer device The specification describes a fluid energy transfer device, comprising: a body means having at least one fluid chamber and fluid inlet and outlet passages for delivering fluid to and from the chamber; means for continuously accelerating the body means; wh... | 12/30/1980 |
| 4240507 | Fire extinguishing system having a dosaging cylinder for an additive Fire-fighting apparatus including a main cistern to be suspended from a flying machine and flown to fires. One or more openings in the bottom readily admit water to fill the cistern and are then closed by a gate until the cistern has been flown to the fir... | 12/23/1980 |
