Class / Patent application number | Description | Number of patent applications / Date published |
417398000 | Rectilinearly reciprocating cylinder and piston-type motor | 19 |
20100014996 | POSITIVE DISPLACEMENT PUMP APPARATUS - A positive displacement pump apparatus ( | 01-21-2010 |
20100329903 | COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE - A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control. | 12-30-2010 |
20120057998 | SYSTEM AND METHODS FOR OPTIMIZING EFFICIENCY OF A HYDRAULICALLY ACTUATED SYSTEM - Systems and methods for efficiently operating a hydraulically actuated device/system are described herein. For example, systems and methods for efficiently operating a gas compression and expansion energy storage system are disclosed herein. Systems and methods are provided for controlling and operating the hydraulic actuators used within a hydraulically actuated device/system, such as, for example, a gas compression and/or expansion energy system, within a desired efficiency range of the hydraulic pump(s)/motor(s) used to supply or receive pressurized hydraulic fluid to or from the hydraulic actuators. In such a system, a variety of different operating regimes can be used depending on the desired output gas pressure and the desired stored pressure of the compressed gas. Hydraulic cylinders used to drive working pistons within the system can be selectively actuated to achieve varying force outputs to incrementally increase the gas pressure within the system for a given cycle. | 03-08-2012 |
20160123319 | DIAPHRAGM PUMP WITH DUAL SPRING OVERFILL LIMITER - A diaphragm pump includes a housing having a pumping chamber containing fluid. The pump has a transfer chamber containing hydraulic fluid, and a hydraulic fluid reservoir in fluid communication with the transfer chamber. The pump housing forms a cylinder with a piston defining a piston inner chamber and sliding in the cylinder. A valve leads to the piston inner chamber with a valve spool slidably mounted in the piston inner chamber to cover the valve and uncover the valve. A diaphragm connects to the valve spool by a plunger. An overfill limiter includes a spacer slidably mounted in the piston inner chamber. A first spring is intermediate the valve spool and the spacer and a second spring is intermediate the end of the piston inner chamber and the spacer, the second spring having a second spring constant greater than the spring constant of the first spring. | 05-05-2016 |
417399000 | Rectilinearly reciprocating cylinder and piston-type pump | 15 |
20080240944 | Air-Operated Pump - An air-operated pump for pumping material such as oil or grease. The pump is powered by an air motor which operates to reciprocate a piston and plunger to effect a pumping action. The air motor is modular in that the air valve system is contained in a single housing fastened to the pump head. The housing is removable as a unit from the pump head to facilitate servicing of the air valve system. | 10-02-2008 |
20080267795 | Positive Displacement Injection Pump - A reciprocating drive mechanism having a housing with upper and lower internal chambers with a spool slidably positioned inside the upper internal chamber. There is at least one fluid inlet and fluid exhaust communicating with the upper internal chamber and at least one slide valve positioned within the upper internal chamber and traveling with the spool. A piston positioned in the lower internal chamber divides the lower internal chamber into an upper and lower cylinder space. There is at least one fluid conduit communicating between the upper internal chamber and the upper cylinder space and at least one fluid conduit communicating between the upper internal chamber and the lower cylinder space. A valve stem is connected to the piston and includes a bore communicating with the upper internal chamber and an exhaust passage is positioned between the upper and lower internal chambers. A first side passage is formed on the valve stem and connects to the bore in the valve stem and a second side passage formed in the valve stem below the first passage and shaped to bridge a seal positioned between the exhaust passage and the upper internal chamber. | 10-30-2008 |
20090196771 | Pumping device - In a pumping device ( | 08-06-2009 |
20100014997 | SPLIT-CHAMBER PRESSURE EXCHANGERS - The invention relates to split-chamber pressure exchangers. Split-chamber pressure exchangers are characterized in that the pressure exchange chambers and the pistons thereof are split in two. Each fluid passes through the corresponding chamber thereof, such that said fluids cannot be mixed. The cross sections of the chambers can be varied in order to vary the transmitted pressure. The reverse line operation can be established and synchronized using a U-shaped tube with telescopic sides and a fixed base filled with fluid or diametrically opposed curved lines, and multiple arrangements can be used. Split-chamber pressure exchangers can be used as surface or well pumping systems and the pumping fluid used can differ from the fluid to be pumped. Different levels of any material can be exploited at any storage site using a chamber with elastic walls filled with fluid and attached to the bottom. Electric power can be generated by centrifuging the pre-pumped fluid. | 01-21-2010 |
20110008189 | DISPENSING PUMP - A pump includes a pump body defining a fluid chamber and inlet and outlet ports in fluid communication with the fluid chamber, an inlet check valve connected to the inlet port, an outlet check valve connected to the outlet port, and a piston housing coupled to the pump body and defining a piston chamber. A piston assembly is disposed at least partially within the piston chamber and at least partially within the fluid chamber and includes a piston and a poppet connected to the piston in proximity to the pump body. In addition, the pump includes a gland disposed between a portion of the piston housing and the pump body. Further, the pump includes the poppet having a poppet head axially connected to a diaphragm coupled to a poppet flange. The poppet head is connected to the piston. | 01-13-2011 |
20110176940 | HIGH PRESSURE INTENSIFIER SYSTEM - A hydraulic pressure intensifier system ( | 07-21-2011 |
20120034113 | PUMPING DEVICE FOR FLUIDS LOCATED AT THE BOTTOM OF A DRILLED WELL - Device for pumping fluid located under conditions of high ambient temperature and pressure which must deliver at high pressure including a hydraulic delivery pump ( | 02-09-2012 |
20120114510 | Reciprocated Pump System for Use in Oil Wells - A reciprocated pump positioned at the lower end of a string of tubing in a bore hole that provides a passageway for moving formation fluid to the earth's surface, including a pump barrel supported in communication with the tubing and a standing valve at the lower end thereof providing a first passageway through which formation fluid flows into the pump barrel, the pump barrel having an intermediate vent port providing a second entry passageway, and a tubular plunger reciprocated within the barrel and having an upper and a lower portion with a plurality of non-metallic seal rings separated by metallic spacers received on the plunger upper portion and configured to support a column of formation fluid within the tubing to substantially isolate the portion of the barrel below the non-metallic seal rings from the tubing pressure to thereby allow formation fluid to move into the pump barrel. | 05-10-2012 |
417400000 | Interconnected moving cylinder and piston | 1 |
20090010772 | Device and method for transferring linear movements - The invention relates to a device, a method and the use of the device, for transferring linear movements. The device consists of a hollow cylinder, in which a pressurized space is found, wherein the pressurized space is bounded by a connection flange, which is attached to a terminal opening of the hollow cylinder, and a movable piston flange, which is applied in a pressure-tight manner to the inside of the cylinder wall of the hollow cylinder, and wherein the connection flange and the piston flange are joined together by means of a reversibly deformable component. | 01-08-2009 |
417401000 | Integral pump and motor pistons | 6 |
20100158717 | VAPOR RECOVERY GAS PRESSURE BOOSTERS AND METHODS AND SYSTEMS FOR USING SAME - A gas pressure booster and a method for using it, which recovers fugitive gas emissions such as at atmospheric pressure, boosts them such as to the pressure level of the low pressure gas sink, and returns them to, e.g., the low pressure gas sink, in a single stage of compression. No electricity or cooling water is required. All gas used to drive the vapor recovery booster may be recovered and vented to the low pressure gas sink. | 06-24-2010 |
20140169993 | CRYOGEN PUMP - A cryogen pump, including: a pump section that includes: a bellow with an inlet opening at a first end and an exit opening, the inlet opening in direct fluid communication with a volume of a cryogen, the exit opening at least in fluid communication with a second end of the bellow opposing the first end, a pair of plugs configured to sealingly close the opposing ends of the bellow, the pair of plugs cooperating so that when one plug sealingly closes one of the ends, the other end of the bellow is open; and a drive section configured to drive the pump section in a reciprocating manner so as to move the plugs. | 06-19-2014 |
417403000 | Double acting motor piston | 4 |
417404000 | Double acting pump piston | 4 |
20100080718 | PRESSURE BOOSTER WITH DOUBLE-SEAT VALVE - The invention relates to a pressure booster ( | 04-01-2010 |
20100209265 | Gas Well Dewatering System - Power and control logic configurations for gas well dewatering systems are provided. In one example, a reservoir is configured to contain hydraulic, lubricating fluid. An electric motor is configured to receive fluid from the reservoir for lubrication and a hydraulic pump powered by the electric motor is configured to receive fluid from the reservoir and pump the fluid into a hydraulic circuit. A positive displacement oscillating pump is powered by the hydraulic pump and configured to pump fluid from the reservoir to an outlet from the well. The electric motor and hydraulic pump receive the same fluid from the reservoir for lubrication and to create pressure in the hydraulic circuit, respectively. A switching device is connected to the hydraulic circuit and is switchable between a first position wherein fluid pressure from the hydraulic pump causes the piston pump to move in a first direction and a second position wherein fluid pressure from the hydraulic pump causes the piston pump to move in a second direction. | 08-19-2010 |
20130094978 | DOWNHOLE PUMP WITH A PRESSURE SEQUENCING VALVE - A downhole pump has a master piston having a first side and a second side in a first piston chamber. The first piston chamber has a first inlet and a second inlet for alternatingly applying fluid pressure to the first side of the master piston to move the piston toward the top of a piston stroke, and to the second side of the master piston to move the piston toward the bottom of the piston stroke. A valve is carried by the master piston that relieves fluid pressure from the respective side of the master piston once the top or bottom of the stroke is reached. There is a sequencing valve with a first state that applies fluid pressure to the first inlet and a second state that applies fluid pressure to the second inlet. The sequencing valve switches between the first state and the second state once a drop in pressure occurs. A slave piston is driven by the master piston in a second piston chamber. The second piston chamber has at least one fluid inlet and at least one fluid outlet. | 04-18-2013 |
20150308420 | Multi-Cylinder Hydraulically-Driven Pump System - A hydraulically-driven pumping unit for pumping a working fluid includes a pair of double-acting hydraulic piston-cylinder (HPC) assemblies, each having a central axis, a hydraulic cylinder, a piston, and a rod coupled to the piston for axial movement relative to the first hydraulic cylinder. The pumping unit also includes a hydraulic fluid source and an exhaust path for hydraulic fluid. The two hydraulic cylinders are coupled to the hydraulic fluid source and the exhaust path such that the movements of the two pistons are synchronized. The two HPC assemblies are configured for phase-shifted operation such that when pumping unit is reciprocating the two pistons and rods, the a first pair of the pistons and rods always has a different combination of axial position and direction of travel than does a other pair of the pistons and rods. During phase-shifted operation, at least one of the two rods is moving to extend further beyond the corresponding hydraulic cylinder at all times. | 10-29-2015 |