Cyclically Operable Patents (Class 91/50)
  • Patent number: 10837233
    Abstract: A control system for a drilling machine includes a vertically movable and rotatable drill string having a drill bit at a distal end, a hydraulic cylinder coupled to the drill string to provide a motive force for the vertical movement of the drill string, the hydraulic cylinder having an extend chamber and a retract chamber, a counterbalance valve selectively opening to fluidly couple the retract chamber to a drain, and a holdback valve selectively controlled to adjust the opening of the counterbalance valve based on a weight of the drill string.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: November 17, 2020
    Assignee: Caterpillar Inc.
    Inventors: Nathan A. Ruetten, Carl J. Moberg
  • Patent number: 9115550
    Abstract: An example robotic method for disassembling and removing a well string (e.g., a string of sucker rods or tubing within a wellbore) involves a computer controlled track and trolley system. Movement of multiple trolleys, carriages, shuttles, articulated arms and other hardware is orchestrated in a manner that minimizes cycle time and thus reduces the overall time for removing the entire well string. In some examples, upper and lower robots travel along and share a first set of tracks while an upper trolley mechanism and a main trolley travel along and share a second set of tracks. In some examples, the two sets of tracks are mounted vertically to a mast, wherein the mast is part of a workover vehicle.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: August 25, 2015
    Inventors: Kasia L. Robnett, Frederic M. Newman, Jonathan V. Huseman, Victor D. Trotter, James B. Story
  • Patent number: 7707926
    Abstract: A pressure differential-driven engine comprises an outer pressurizable enclosure and an actuator enclosure, disposed within the outer enclosure. An actuator is disposed within the actuator enclosure and a portion of the actuator and the actuator enclosure cooperatively define a pressurizable cavity cyclable between a first, high pressure state, and a second, low pressure state. The actuator and actuator enclosure are collectively restrained by at least one rail to linear, slidable motion within the outer enclosure. The engine is operable to output usable energy as the pressurizable cavity cycles between the first and second pressure states.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: May 4, 2010
    Inventor: William Gilbert
  • Publication number: 20090165639
    Abstract: A system for producing mechanical motion is provided. The system includes an actuator having a first end, a second end, and a radially expandable bladder assembly extending therebetween, and a source of pressurized fluid external to said actuator. The bladder assembly further includes an inner cavity. In addition, a substantially fixed-volume reservoir positioned within the cavity is provided, wherein the bladder assembly is configured to expand in a radial direction and contract in an axial direction when a volume of fluid is introduced from the reservoir into the inner cavity.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 2, 2009
    Inventor: Jeffrey Lynn Myers
  • Publication number: 20080078287
    Abstract: A pressure differential-driven engine comprises an outer pressurizable enclosure and an actuator enclosure, disposed within the outer enclosure. An actuator is disposed within the actuator enclosure and a portion of the actuator and the actuator enclosure cooperatively define a pressurizable cavity cyclable between a first, high pressure state, and a second, low pressure state. The actuator and actuator enclosure are collectively restrained by at least one rail to linear, slidable motion within the outer enclosure. The engine is operable to output usable energy as the pressurizable cavity cycles between the first and second pressure states.
    Type: Application
    Filed: July 24, 2007
    Publication date: April 3, 2008
    Inventor: William Gilbert
  • Patent number: 7246550
    Abstract: 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 enclosure (16) is disposed adjacent the pressure barrier plate and has an actuator (17) disposed therein. The actuator has a high pressure exposure surface (30) forming an oblique angle with respect to the pressure barrier plate. The pressure barrier plate, a bottom of the actuator, and the actuator enclosure cooperatively define a pressurizable cavity (34) cyclable between a first, high pressure state, and a second, low pressure state. The actuator and actuator enclosure are collectively slidable relative to the barrier plate in reaction to cycling of the pressurizable cavity between the first and second pressure states to produce usable translational energy.
    Type: Grant
    Filed: April 4, 2004
    Date of Patent: July 24, 2007
    Inventor: William Gilbert
  • Patent number: 7174824
    Abstract: 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 impact element (8), which is controlled by a control valve (2). The control valve comprises a control element (5), which is arranged to control channels (7b) leading to a working pressure surface (9) of the impact element (8). The movement of the control element to its extreme position is arranged to form a closed pressure space, where pressure medium compresses and converts kinetic energy of the control element into pressure energy. The pressure energy is re-converted into kinetic energy and utilized when the control element changes its direction.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: February 13, 2007
    Assignee: Sahdvik Tamrock Oy
    Inventors: Antti Koskimäki, Markku Keskiniva, Jorma Mäki, Erkki Ahola
  • Patent number: 5626016
    Abstract: 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 comprising a concave outer skin on one side and a convex outer skin on the other side which define between them a cavity. The cavity is connected to a hydraulic driving circuit which provides a continuous series of high pressure pulses. Each pulse causes the deformable element to change shape. The continuous application of a series of pulses causes the deformable element to continuously vibrate. The high pressure pulses are generated by creating a water hammer within a conduit by means of a valve which can be rapidly opened and closed to allow fluid to flow through the conduit and then suddenly block the fluid flow. The vibrating apparatus may be used to shake industrial structures such as shaking screens, shaking tables, hoppers, bins or the like.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: May 6, 1997
    Inventor: Bruno H. Walter
  • Patent number: 5281108
    Abstract: 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). Deflection of the diaphragm by the gas pressure drives liquid out of the pumping chamber. The driving chamber has a normally closed outlet valve (30 or 54) connected to the diaphragm through a flexible or lost-motion connection (34, 36 or 56) so that the valve is opened after a certain deflection of the diaphragm. The driving chamber pressure is thereby released and allows the diaphragm to return, drawing further liquid into the pumping chamber. The return movement of the diaphragm also allows the valve to reclose and the cycle is repeated while the supply of pressure gas to the driving chamber is maintained.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: January 25, 1994
    Inventor: Gerard Brooke
  • Patent number: 5209152
    Abstract: 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 air intake plate to utilize increasing air velocity at the initiation of bottom changeover in order to assure more reliable changeover.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: May 11, 1993
    Assignee: Graco, Inc.
    Inventor: Andrew M. Olson
  • Patent number: 5115717
    Abstract: 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 piston having a front end and a rear end operatively mounted in the housing for oscillating movement between the front end and the rear end of the housing, a front pressure chamber provided in the front end of the housing, a rear pressure chamber provided in the rear end of the housing, a high pressure air supply line, a control device for controlling the application of pneumatic pressure on the percussion piston, the control device having a control piston extending axially from the rear end of the percussion piston into an opening of an end piece of the housing and having at least one radial control channel that is closable by the end piece, and an axial channel provided in the percussion piston, wherein when the percussion piston is in a forward position the axial channel communicates with the radial control channe
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: May 26, 1992
    Inventor: Helmuth Roemer
  • Patent number: 4878550
    Abstract: 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 pilot fluid pressure supply, tapped from the compressed air from a major air flow passage to either a first or a second feed passage. Compressed air conducted through the first feed passage accelerates the piston toward the bit and compressed air conducted through the second feed passage accelerates the piston away from the bit. The continuous reciprocation of the spool is independent of the position of the piston relative to the cylinder.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: November 7, 1989
    Assignee: Sandvik Rock Tools, Inc.
    Inventor: Jo-Yu Chuang
  • Patent number: 4870890
    Abstract: 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 pressurized fluid controlled by an automatic reversing valve including spaced check valves. The check valves are selectively seated and unseated by a spring biased piston and fluid pressure controlled valve actuator assembly. The reversing valve system includes anti-stalling features and is of single, low cost, field repairable nature. The motor system also includes features to prevent chattering oscillation due to abrupt changes in motor load.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: October 3, 1989
    Inventor: Philip L. Cowan
  • Patent number: 4798125
    Abstract: 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 means to elevate a hydraulic jack.This invention makes use of a working lever and a working body attached to the hydraulic mechanism which is compactly closed inside a body to drive the hydraulic lever of the hydraulic mechanism which is compactly closed at the other end of the body to conduct a continuous backward/forward movement which will press against and elevate the hydraulic jack. Such a movement is similar to a continuous backward/forward movement conducted by a piston in a cylinder body. However, the entire structure and effected of this invention is found much better because of its easy fabrication and its function of elevating the hydraulic jack by means of a pneumatic mode, which saves both time and strength and thus meet the requirement of a simple and automatic operation.
    Type: Grant
    Filed: November 3, 1987
    Date of Patent: January 17, 1989
    Inventors: Fung M. Chang, Chien C. Hsu, Wen C. Chen
  • Patent number: 4663938
    Abstract: 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 small wall area to volume ratio. The most stable near-laminar flow in a cylinder is an axial vortex because of symmetry, and hence the induction port design should establish an axial vortex and a low velocity. Induction and exhaust port designs to achieve this flow are applied to a vane pump, an adiabatic air compressor, a diesel engine, and two and four stroke Otto cycle engines. The gain in thermal efficiency for these designs can be significant, up to a factor of 2, since the largest inefficiency in nearly all positive displacement machinery is imperfect control of heat flow.
    Type: Grant
    Filed: January 2, 1985
    Date of Patent: May 12, 1987
    Assignee: Colgate Thermodynamics Co.
    Inventor: Stirling A. Colgate
  • Patent number: 4648810
    Abstract: 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 divides the enclosure into a pumping chamber on one side and an actuating chamber on the other side. The piston means may comprise either a slideable piston or a flexible diaphragm. An inlet valve and a separate outlet valve are each connected to the pumping chamber, and a control system is provided for intermittently supplying a pressurized working fluid to the actuating chamber so as to intermittently move the piston means in the discharge direction, with the piston means being moved in the opposite or suction direction by either the pressure of the fluid being conveyed, or a suitable spring.
    Type: Grant
    Filed: May 14, 1985
    Date of Patent: March 10, 1987
    Assignee: Barmag Barmer Maschinenfabrik AG
    Inventors: Heinz Schippers, Siegfried Hertell
  • Patent number: 4523901
    Abstract: 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 divides the enclosure into a pumping chamber on one side and an actuating chamber on the other side. The piston means may comprise either a slideable piston or a flexible diaphragm. An inlet valve and a separate outlet valve are each connected to the pumping chamber, and a control system is provided for intermittently supplying a pressurized working fluid to the actuating chamber so as to intermittently move the piston means in the discharge direction, with the piston means being moved in the opposite or suction direction by either the pressure of the fluid being conveyed, or a suitable spring.
    Type: Grant
    Filed: October 13, 1982
    Date of Patent: June 18, 1985
    Assignee: Barmag Barmer Maschinenfabrick AG
    Inventors: Heinz Schippers, Siegfried Hertell, Otwin Eich
  • Patent number: 4520886
    Abstract: 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 flow paths, a central path and a peripheral path, through which drilling mud flows alternately in order to cause reciprocation of a percussion head located in the central path. The peripheral path joins the central path downstream of the percussion head. The external conical surface of the divergent duct is connected to the external cylindrical surface of the cylindrical duct via a radial step, which makes the flow in the peripheral path unstable, so that under normal conditions of flow the drilling mud flows along the central path. Flow along the central path is interrupted by contact of the percussion head with an abutment, which limits its movement in one direction, and which closes the central path, causing flow to switch to the peripheral path.
    Type: Grant
    Filed: July 6, 1983
    Date of Patent: June 4, 1985
    Assignee: Compagnie Francaise des Petroles
    Inventor: Lionel Marais
  • Patent number: 4503752
    Abstract: 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. The pumping unit includes a load sensing, pressure and flow compensated pump that is destroked under no load conditions, a pumping cylinder including a polished rod coupled to the sucker rod, and a unique hydraulic valving assembly that couples the hydraulic fluid pump with the pumping cylinder. The hydraulic valving assembly includes a cylinder control module for independent control of the rates at which the polished rod is raised and lowered, and a signal control module for indicating the upper and lower limits of polished rod travel within the pumping cylinder. The cylinder control module provides for soft turnaround of the polished rod, thereby guarding against stretching of the sucker rod and subsequent degradation of the unit's pumping capacity.
    Type: Grant
    Filed: March 29, 1983
    Date of Patent: March 12, 1985
    Assignee: Hypex, Incorporated
    Inventors: Samson A. Olson, George C. Williams
  • Patent number: 4488473
    Abstract: 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 includes delivery and return lines extending between a source of fluid under pressure and the working head, and pilot control means associated with the fluid pressure source is operative to regulate the working and return cycle. The working head has a plurality of annular flexible casings of toroidal configuration with opposite sidewalls terminating in mutually opposed, inner bead-like edges and interconnecting means extending between the edges of adjacent casings serve to interconnect the casings in sealed, coaxially spaced relation to one another. Closures at opposite ends of the plurality of casings define a common sealed chamber therebetween. A support member fixes one end of the chamber against movement and permits axial expansion and contraction of the opposite end of the chamber with respect to the fixed end.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: December 18, 1984
    Assignee: Liquid Power, Inc.
    Inventor: Jimmie L. Gammon
  • Patent number: 4462464
    Abstract: 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 pressures, and provide a connection to the tubing through which the sucker rods are operated. The primary casing seal is formed by the mating contact of metal surfaces that are not subject to deterioration. The actuator for the subsurface pump is a vertically disposed hydraulic cylinder unit aligned with the sucker rods and forming the uppermost section of an elongated cylindrical housing, which also has a lowermost section on the wellhead that provides the outlets for the fluid pumped from the well, and an intermediate, control section that contains a spool valve for controlling the hydraulic actuator. The spool is shifted by the piston and rod of the hydraulic actuator at the upper and lower limits of their stroke to thereby reciprocate the sucker rods and operate the subsurface pump.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: July 31, 1984
    Assignee: Harold D. Brown
    Inventors: Harold D. Brown, Leon J. Rohling, Mark A. Brown
  • Patent number: 4434705
    Abstract: 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 exhaust path of the two-position valve so that the latter remains in a first position in which pressure fluid is obliged to flow through the braking valve, in a fully opened condition, to the cylinder of the ram. At the end of the powered stroke the spool valve is shifted to a second position in which it permits exhausting of fluid through the two-position valve, and as a result of change of differential pressure in the latter, the pressure fluid previously obliged to flow through the braking valve is permitted to flow to exhaust. The braking valve is then less open, so the ram carries out its return stroke at a slower rate.
    Type: Grant
    Filed: October 30, 1981
    Date of Patent: March 6, 1984
    Inventor: Pedro Roquet Jorda
  • Patent number: 4401168
    Abstract: 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 connected to the member to which impact is to be applied, a piston (5) slidably mounted within the cylinder (13), means to admit pressure fluid to the cylinder (13) below the piston (5), at least one valve tube (24), slidably mounted in the base of the cylinder (13), coil springs (30) to bias the upper end of the valve tubes (24) into sealing engagement with the underside of the piston (5) when the piston is in its lowest position, a flange (26) on the upper end of the valve tubes (24) upon which fluid pressure in the cylinder (13) acts to produce a force urging the end of the valve tubes (24) into contact with the underside of the piston (5), and further coil springs (32) to provide a force to said valve tubes (24) of a magnitude which increases as the piston (5) moves upwardly relative to the cylinder (13) to subsequen
    Type: Grant
    Filed: July 9, 1981
    Date of Patent: August 30, 1983
    Assignee: Conzinc Riotinto Malaysia Sendirian Berhard
    Inventor: Peter Claringbull
  • Patent number: 4387708
    Abstract: 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 central partition incorporating a movable poppet valve. A front diaphragm is movably carried in the body immediately ahead of the partition so as to define a pressure chamber therebetween. A relief chamber is defined on the opposite side of the partition as established by a second or rear diaphragm which also carries the poppet valve. A hammer is secured to the front diaphragm so as to follow its movement and an application pad is fixed to the hammer. Biasing springs normally maintain the poppet valve closed and the front diaphragm against an impact seal carried on the partition.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: June 14, 1983
    Inventor: James E. P. Davis
  • Patent number: 4382475
    Abstract: 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 portion formed on the upper part of its top plate; the back of the top plate of the cylinder is sealingly connected with the opening of the fluid chamber by means of a diaphragm; water jet heads are provided oppositely to each other at the back of the top plate of the cylinder and the surface of the bottom plate of the fluid chamber respectively, said water jet heads being arranged to approach or space from each other in accordance with the vertical motion of the fluid chamber; and a hammering element is located between these water jet heads such that the upper and lower end parts of said element are sealingly fitted on or detached from the respective water jet heads.
    Type: Grant
    Filed: May 19, 1981
    Date of Patent: May 10, 1983
    Inventor: Tomio Suzuki
  • Patent number: 4351225
    Abstract: 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 of one member defines a cylinder and cylinder chamber which receives a piston defined in the end of the other member. Pressurized air is introduced into the cylinder chamber causing the chamber to expand and the members to be translated axially from each other against the force of compression springs. Translation of the piston beyond an exhaust passage in the cylinder wall permits the chamber to exhaust whereupon the compression springs will drive the members toward their original position. The members constantly cycle in this manner to provide vibration attenuation.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: September 28, 1982
    Assignee: The Aro Corporation
    Inventors: Karl A. Brandenberg, Wilbert G. Kautz
  • Patent number: 4350477
    Abstract: 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 to limit the flow to one direction. A middle portion of the tube is positioned within a first chamber that is connected by a hose to a second chamber. The second chamber has a flexible member that is reciprocally moved by an arrangement that includes a housing and a source of compressed gas. The housing has a valved inlet and outlet and the flexible member forms a portion of the boundary of the housing. The valve for the outlet of the housing is attached to the flexible member which is a metallic disc inherently biased in a concave shape in relation to the housing. In operation, the flexible member inverts to a convex shape as pressure increases within the housing emitting a click.
    Type: Grant
    Filed: April 20, 1977
    Date of Patent: September 21, 1982
    Inventor: Charles N. Mazal
  • Patent number: 4333492
    Abstract: Disclosed is a liquid inertia tool in which the kinetic energy of flowing liquid is converted to useful work by decelerating the liquid flow and directing the inertia force in the water against a movable element in the liquid flow-containing structure which in turn moves against a work piece. Flow deceleration is achieved by an orifice-effect valve. The valve is reset for flow resumption or acceleration by automatically or selectively applying hydraulic pressure to a reset mechanism. Use of the inertia tool in pile driving and punch press applications is disclosed.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: June 8, 1982
    Inventor: Joe E. West
  • Patent number: 4295759
    Abstract: 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 tremie has a valve located in a lid that serves for the tight seal of the tremie. The valve is subjected to a counter-pressure which is greater than the effective power of the internal pressure of the tremie. A hoisting cable is connected to the valve stem and the power of the hoisting cable under normal operating conditions in combination with the internal pressure of the tremie is large enough to overcome the counterpressure. The valve is shifted to vent the internal pressure of the tremie when the same is rapidly removed from the footing bore due to a decrease in ground friction.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: October 20, 1981
    Assignees: Elisabeth Hochstrasser geb. Wack, Jurgen Hochstrasser
    Inventors: Hans Mathieu, Jurgen Hochstrasser
  • Patent number: 4276001
    Abstract: 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 apparatus has an inlet connected to a fluid additive supply, and an outlet which communicates with the conduit for feeding the fluid additive to the conduit. Control apparatus includes a dump passage communicating with the chamber and has a cross section larger than the orifice. A dump valve controls the flow of fluid through the dump passage to regulate the fluid pressure in the fluid chamber, and motor apparatus operatively connects the pump apparatus and the dump valve. The motor apparatus is responsive to the fluid pressure in the fluid chamber for operating the dump valve and actuating the pump apparatus to pump fluid additive through the outlet.
    Type: Grant
    Filed: January 15, 1979
    Date of Patent: June 30, 1981
    Assignee: Dema Engineering Co.
    Inventor: Lambert Holmes
  • Patent number: 4249376
    Abstract: 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 from said frame generally coaxially of said polish rod, a piston movable in said cylinder and having an end engaging said polish rod, a source of high pressure fluid connected to said cylinder for raising said piston in the cylinder, dump means on said frame simultaneously discharging the raising fluid from said cylinder and by-passing fluid from said source of high pressure fluid to said source of fluid, means on said piston selectively actuating said dump valve from a first position where all fluid from the source of high pressure fluid is delivered to one side of the cylinder for raising the piston to a second position where all fluid from the source and from said one side of the piston is simultaneously returned to the source and to the other side of the cylinder whereby the piston and polish rod are successivel
    Type: Grant
    Filed: June 13, 1978
    Date of Patent: February 10, 1981
    Inventor: Darl E. Weckerly
  • Patent number: 4229143
    Abstract: 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 potential energy of a primary liquid column by interposing a system of vessels sealed off from the atmosphere between the primary liquid column and the secondary fluid substance basis.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: October 21, 1980
    Assignee: "NIKEX" Nehezipari Kulkereskedelmi Vallalat
    Inventors: Janos Pucher, Antal Schmider
  • Patent number: 4166410
    Abstract: 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 the working chamber cylinder. A valve which closes an exhaust port leading from the working chamber, is opened at the end of the power stroke by working chamber air pressure and the air pressure is evacuated from the working chamber. The valve is returned to closing relation to the port by the returning piston, thereby resetting the motor for another cycle of operation.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: September 4, 1979
    Assignee: Edward Bleiweiss
    Inventor: Paul W. Schlosser
  • Patent number: 4150603
    Abstract: A fluid operable hammer including variable volume exhaust fluid receiving chamber means cooperable with improved motive fluid inlet and exhaust valve means.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: April 24, 1979
    Assignee: Joy Manufacturing Company
    Inventors: Murray D. Etherington, David V. Roberts
  • Patent number: 4147516
    Abstract: 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 that member or system, whereby its oscillation is caused or maintained, being by means of fluid pressure, the mechanism comprising means defining one or more chambers each having an inlet connectible to a source of pressurized fluid and an outlet through which, when open, pressurized fluid supplied to each chamber can escape; the respective chamber being expansible under the action of said pressurized fluid when each said outlet is closed; and wherein the motion of the oscillatory member or system in operation cyclically opens and closes each said chamber outlet, the consequent expansion of the respective chamber upon closure of the outlet delivering an impulse to said member or system whereby the oscillation thereof is caused or maintained.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: April 3, 1979
    Inventor: Norman A. deBruyne
  • Patent number: 4117764
    Abstract: 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 another. The members define a pressure chamber therebetween, which is in communication with a source of pressure medium and is sealed by a flexible sealing material such as an O ring. Each member is acted upon by a compression spring exerting a force on the individual member in a direction towards the other member. The introduction of the pressure medium into the pressure chamber results in a cycle comprising the (1) members being forced away from each other, (2) the pressure medium escaping from the pressure chamber and (3) the members being returned to their original positions by the action of the springs. The invention provides a completely balanced two mass system which is particularly useful in conjunction with impact mechanisms used for hand tools.
    Type: Grant
    Filed: March 15, 1977
    Date of Patent: October 3, 1978
    Inventors: Goran Alfred Nilsson, Kjell Edstrom, Henry Wiklund
  • Patent number: 4088062
    Abstract: 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 working and stop members to receive a fluid pressure medium to exert forces separating the two members, and pressure sealing means for maintaining the pressure chamber sealed as the working member and stop member separate. The mechanism is characterized by a sealing arrangement which requires few precision parts yet is applicable to a variety of different devices. In the sealing arrangement, the pressure chamber is formed in the surface of at least one of the members, so that the two members meet along a separating line at the periphery of the pressure chamber. One of the members forms a support wall or flange extending in an axial direction along the separating line, and a flexible sealing means extends from the support wall of the one member to the other member, thereby effecting a seal therebetween.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: May 9, 1978
    Inventors: Goran A. Nilsson, Kjell Edstrom, Henry Wiklund
  • Patent number: 4077303
    Abstract: 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 sectional area at one end of the chamber than at the other end thereof. A fluid is introduced into the chamber under pressure, and exerts a net axial force on the large cross section end of the piston. One end of the piston outside the chamber forms a cam, which is engaged by a spring loaded cam follower to prevent axial movement of the piston until the force thereon exceeds a predetermined value. When the force on the piston exceeds said value, the cam is suddenly disengaged from its follower, permitting rapid movement of the piston under the fluid pressure. When the piston reaches the end of its travel, fluid is permitted to leave the chamber so that the pressure on the piston rapidly decreases, and the spring loaded cam follower acts on the cam to return the piston to its initial position.
    Type: Grant
    Filed: April 14, 1976
    Date of Patent: March 7, 1978
    Inventor: Peder Ulrik Poulsen
  • Patent number: 4044844
    Abstract: 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 hammer have reciprocal sliding movement along the longitudinal axis of the tool to substantially interrupt flow of a drilling fluid therethrough. Movement of the valve and hammer predominantly results from different pressures acting on separate pressure areas of the valve and hammer. The hammer may impact either an anvil or a bit attached thereto. Wear on the valve and hammer is reduced by smooth, hardened surfaces at locations subject to wear. A trapped fluid may also be used in an alternative embodiment to dampen the shock effect of the valve as it reaches its upper and lower stops.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: August 30, 1977
    Assignee: Bassinger Tool Enterprises, Ltd.
    Inventors: Jesse W. Harris, Ross Bassinger, Grey Bassinger
  • Patent number: 3970152
    Abstract: 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 controlled by a valve element at the upper portion of the hammer. Differential pressure areas are provided in the flow path of the drilling fluid which coupled with the action of the valve element causes the hammer to be repeatedly lifted up into the valve element and then driven downward against an anvil by the force of the drilling mud. The valve element remains partly open, thereby preventing excessive backpressures from damaging the drill pipe or equipment. The drilling device is attached immediately above the drill bit with the drill bit being secured to the anvil. A catcher device is mounted to stop the reciprocating impact action of the hammer against the anvil upon picking the bit up off bottom.
    Type: Grant
    Filed: June 14, 1974
    Date of Patent: July 20, 1976
    Assignee: Bassinger Tool Enterprises, Ltd.
    Inventors: Jesse W. Harris, Ross Bassinger, Grey Bassinger
  • Patent number: 3963038
    Abstract: 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 chambers. Each main fluid chamber has its own integral inlet and outlet valve means which enables the chambers to cyclically discharge fluid mixture which is part additive and part water obtained from a main feed line. The movable diaphragm is alternately exposed to a fluid source under pressure on one side and to a relative vacuum, created by the evacuation of fluid, on the other side.A piston is connected to the movable diaphragm and moves slidably within a piston housing forming thereby two piston chambers. The movement of the piston within its housing creates a vacuum in one of the piston chambers, and the additive (e.g.
    Type: Grant
    Filed: August 15, 1974
    Date of Patent: June 15, 1976
    Inventor: Raymond W. Jensen
  • Patent number: 3960058
    Abstract: 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 by means of fluid under pressure supplied against one side of the piston, said cylinder including an inlet for fluid at one end and an outlet for fluid at the other end, and said piston including an overflow aperture from one working side to the other, which aperture is controlled by a stop valve that is either completely open or completely closed depending upon its impact against two spaced apart points on the cylinder end walls.
    Type: Grant
    Filed: December 10, 1974
    Date of Patent: June 1, 1976
    Inventor: Hans Berkelius