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7246550 |
Pressure differential-driven engine
A pressure differential-driven engine ( 10 ) includes an outer pressurizable enclosure ( 12 ). A pressure barrier plate ( 14 ) is disposed within the outer pressurizable enclosure and an actuator...
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7174824 |
Control valve in a percussion device and a method comprising a closed pressure space at the end position of the piston
The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. The percussion device ( 1 ) used for breaking rock comprises an...
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5626016 |
Water hammer driven vibrator having deformable vibrating elements
The invention provides a vibrator which may be used to vibrate industrial apparatus such as a conveyor, hopper, bin, screen, shaker table, or to agitate a fluid. The vibrator has a element...
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5281108 |
Diaphragm pumps
A diaphragm pump comprising a pumping chamber (10) is operated by a continuous flow of pressure gas to a driving chamber (12) separated from the pumping chamber by a flexible diaphragm (8 or 52)....
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5209152 |
Airfoil changeover device
An air operated reciprocating piston pump having a differential area piston is provided with an annular shaped airfoil device having a chevron cross-section and which is located beneath the bottom...
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5115717 |
Ramming apparatus
A ramming apparatus having a shortened length without sacrificing ramming power requirements is disclosed comprising a housing having a front end and a rear end, a pneumatically driven percussion...
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4878550 |
Pilot-valve-controlled percussion drilling tool
A down-hole percussion drilling tool supplied with compressed air includes a piston reciprocated in an enclosed cylinder against a bit. A spool is continuously reciprocated in a valve chamber by a...
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4870890 |
Automatic reversing valve
A fluid energized double acting motor is provided for use as the drive for reciprocating mechanisms such as paint pumps for airless spray painting. A piston within the pump housing is moved by...
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4798125 |
Pneumatic type of hydraulic structure
This invention pertains to a pneumatic mode under which the structure of a hydraulic system is driven, particularly denoting the pneumatic mode under which a mini air compressor is being used as a...
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4663938 |
Adiabatic positive displacement machinery
Adiabatic positive displacement gas cycle machinery is designed with explicit control of the heat flow between the gas and the walls. The control is achieved by maintaining near-laminar flow and a...
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4648810 |
Control apparatus for a positive displacement reciprocating pump
A positive displacement reciprocating pump for conveying a liquid or gaseous fluid is disclosed and which comprises a fluid enclosure having a movable piston means mounted therein which sealably...
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4520886 |
Rotary drilling tool with percussion device
A hollow rotary drilling tool is equipped with a percussion device which comprises a nozzle comprising a cylindrical annular duct followed by a divergent annular duct. The divergent duct opens into...
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4503752 |
Hydraulic pumping unit
A hydraulic pumping unit is provided that is especially adapted for use for pumping oil from a well, and that provides for independent upstroke and downstroke speed control of the well sucker rod....
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4488473 |
Fluid-actuated ram
A working head is adapted to impart reciprocal motion under a predetermined amount of force to a plunger through a working and return cycle and at a controllable rate of speed. A fluid circuit...
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4462464 |
Wellhead with hydraulic pump actuator
A wellhead assembly especially suited for oil wells has a wide working pressure range and employs three components which fit together to seal the well casing, hold the tubing against high wellhead...
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4434705 |
Introduced in the hydraulic actuation for the alternative movements of the swinging arms of petroleum extractor machines
A reciprocable drive mechanism has a fluid pressure operable ram controlled by a spool valve, a two-position valve and a braking valve. During a powered stroke of the ram, the spool valve closes an...
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4401168 |
Impact applying mechanism
There is disclosed an impact applying mechanism, particularly as applied in a subterranean drilling apparatus, and comprising a cylinder (13) arranged with its axis substantially vertical and...
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4387708 |
Pneumatic percussor
A pneumatic percussor is disclosed herein for therapeutic purposes such as to loosen and mobilize bronchial secretions in humans which provides an applicator having a cylindrical body with a...
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4382475 |
Hydraulic hammering apparatus
This hydraulic hammering apparatus is so constructed that an upwardly opened fluid chamber is accommodated in a vertically movable manner within a longitudinal cylinder having a weight holding...
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4351225 |
Vibration attenuation construction for an impact air tool
A vibration and noise attenuating construction for impact air tools, such as a chipper, includes axially reciprocal working and balancing members which move toward and away from each other. The end...
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4350477 |
Pneumatic pulsatile fluid pump
A portable pumping system for administering fluids intravenously to a patient. The system has a tube connected between the fluid source and the patient with one-way valves at each end of the tube...
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4295759 |
Device for the control of the internal pressure in a drill pipe for the construction of footings
A device for the control of the internal pressure in a drill pipe or tremie is disclosed. The tremie is used in footings and especially in the construction of compressed concrete footings. The...
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4276001 |
Fluid pump assembly
A fluid pump assembly having a body provided with a fluid chamber and a passage having an orifice, the passage connecting the chamber to a conduit carrying a pressurized flow of fluid. Pump...
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4249376 |
Pump jacks
A pump jack for pumping oil and like wells having a polish rod extending vertically out of a well casing is provided including a frame adapted to fit over said well, a hydraulic cylinder depending...
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4229143 |
Method of and apparatus for transporting fluid substances
The present invention relates to a method and an apparatus for transporting in alternating suction and displacement strokes of fluid substances, e.g., water, slurry, etc., by quanta by means of the...
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4166410 |
Pneumatic motor
A reciprocating piston motor has the piston biased in return stroke direction and driven in power stroke by air pressure introduced between the head of the piston and a closure across the end of...
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4150603 |
Fluid operable hammer
A fluid operable hammer including variable volume exhaust fluid receiving chamber means cooperable with improved motive fluid inlet and exhaust valve means.
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4147516 |
Oscillatory mechanisms
An oscillatory mechanism, designed particularly for use in a laboratory shaker, includes a member, or a system of members, arranged to perform oscillatory movements, the transmission of power to...
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4117764 |
Vibration attenuating device
A vibration attenuating device to be used in conjunction with reciprocating-motion type impact mechanisms having working and stop members that are axially movable relative towards or away from one...
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4088062 |
Fluid pressure operated impact mechanism
A fluid pressure operated impact mechanism of the type having a reciprocating working member guided for movement along an axis toward and away from a stop member, a pressure chamber between the...
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4077303 |
Apparatus for generating an impact force
A mechanism for generating a high impact force for hammering, pounding, stamping, forging or similar operations. A piston is slidably mounted in a fluid pressure chamber, and has a larger cross...
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4044844 |
Impact drilling tool
A fluid operated impact drilling tool has a hammer slidably mounted in a casing connected to a string of drilling pipe. Inside the casing above the hammer is mounted a valve. Both the valve and...
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3970152 |
Mud actuated drilling tool
A fluid operated impact drilling device wherein a hammer is mounted in a casing for axial reciprocating movement and drilling fluid flows through the hammer. The flow of drilling fluid is...
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3963038 |
Liquid proportioning pump
The invention is directed to a hydraulically actuated feed and proportioning pump with a centrally located movable diaphragm which divides a main pump housing into two variable volume main fluid...
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3960058 |
Device at hydraulic motor
This invention relates to a hydraulic motor device comprising a cylinder and a piston reciprocating therein said piston being moved in one direction by means of a spring and in the other direction...
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3918350 |
Pressurized fluid controlled vibrators
A vibrator device is provided in which the actuator rod of a hydraulic ram or jack is rapidly reciprocated, automatically, by means of a hydraulic control circuit which includes a pump, a plurality...
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3908373 |
High energy rate actuator
A high energy linear actuator includes an enclosed cylinder with a sleeve slideable within the cylinder to define a compression chamber and a liquid chamber on opposite sides of the sleeve. A...
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3862544 |
LUBRICATING APPARATUS
Lubricating apparatus for automatically providing a constant supply of lubricant to air operated tools during the operation of such tools, including an expansible and contractible pump chamber...
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3851667 |
PULSATOR FOR HYDRAULIC SYSTEMS CONTROLLING ACTUATING MECHANISMS
In the housing of a pulsator are accommodated a delivery valve and on its opposite ends, a rigidly connected pusher serving for opening the valve and an air cylinder for actuating said valve at its...
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3771420 |
LIQUID CONTROL DEVICE
A liquid pulsator is described by which a flow of fluid is repeatedly interrupted and delayed and thus converted to a train of liquid pulses. The pulses are formed by opening and closing a valve...
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3643432 |
PNEUMATIC PUMP ACTIVATOR FOR OIL WELLS
A wellhead mounted pneumatic actuating device for oil well pumps designed for operation by compressed air or gas. The preferred embodiment utilized a single action cylinder with the down stroke...
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3638529 |
APPARATUS FOR GENERATING AN OSCILLATORY MOTION
A fluid piston/cylinder mechanism for generating oscillatory motion consists of a cylinder having an inlet port in one end and outlet ports in its walls, uncovered when the piston is remote from...
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3580137 |
FLUID PROXIMITY SENSOR AND DRIVE MECHANISM TO CONTROL DISTANCE OF AN OBJECT FROM THE SENSOR
A unipressure fluid logic control and power supply device which utilizes a single air pressure source for sensing and indicating the proximity or gap between a sensor and a driven element. The same...
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3538814 |
DOUBLE-ACTING HYDRAULIC CYLINDER AND CONTROL THEREFOR
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3511278 |
PNEUMATIC CONTROL SYSTEM AND PNEUMATICALLY OPERATED ACTUATOR THEREFOR OR THE LIKE
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3500753 |
INJECTION PUMP APPARATUS
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3494290 |
CONTROL SYSTEM FOR CONCRETE PUMP
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3429274 |
DIAPHRAGM PUMP,IN PARTICULAR FOR PUMPING VISCOUS LIQUIDS
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3427987 |
TUBULAR DIAPHRAGM PUMP
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3424092 |
PAINT PUMPING SYSTEM
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