Rigidly Connected Pistons Reciprocate Within Rigidly Connected Cylinders Patents (Class 91/493)
  • Patent number: 9771930
    Abstract: Compressor unit (12) of a compressor (10) for compressing refrigerant, comprising a drive device, particularly a drive shaft (24), for driving one or more pistons (14) that are arranged in a radial direction and that can be moved back and forth in extension and retraction movements in corresponding cylinder bores (16), wherein the drive device is in operative engagement with an eccentric (28) that controls the extension movement of the pistons (14), said eccentric (28) also controlling the retraction movement of the piston (14), the invention further relating to a corresponding compressor (10).
    Type: Grant
    Filed: March 19, 2013
    Date of Patent: September 26, 2017
    Assignee: GEA BOCK GMBH
    Inventor: Arno Görlich
  • Patent number: 9051833
    Abstract: An X-Engine assembly includes four cylinder banks which are located on two intersecting planes with the crankshaft axis being on the line of the intersection of the two planes, and having a Double-Acting Scotch Yoke (DASY) power conversion system that couples the reciprocating motion of the pistons with the rotating crankshaft to provide pure sinusoidal piston motion. A series of DASY X-Engine configurations that satisfy even-firing for both 2-stroke and 4-stroke, and other engine cycles, achieve perfect balance with regard to vibrating forces and moments that are all zero, and all configurations have zero torsional vibration of the crankshaft resulting from the reciprocating masses.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: June 9, 2015
    Inventor: Matthew Byrne Diggs
  • Patent number: 8894384
    Abstract: A multi-piston motor/pump is disclosed particularly useful for air motor applications incorporating a cylinder block having a plurality of radially extending pistons and cylinders. Each cylinder is provided with a bronze insert at the top of the cylinder having an intake and exhaust port therein. Rotary valves are mounted on an output shaft and include axial flanges having openings therein that align with the input or exhaust openings in each cylinder. As the rotary valves rotate, the openings therein sequentially align with the input/exhaust ports provided in the bronze inserts such that air or fluid entering each cylinder enters axially of the cylinder. A center mounting plate is secured to the cylinder block and separates the input ports from the exhaust ports to enable fluid flow into the input ports and exhaust from the exhaust ports while isolating each port from the adjacent port in each cylinder.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: November 25, 2014
    Inventor: George Konrad
  • Patent number: 8640450
    Abstract: A compressed fluid motor has a plurality of cylinders with a piston and a piston rod. A main bearing is concentric with a crankpin and coupled to a shaft. Compressed fluid on the piston pushes on the main bearing via its corresponding piston rod. Bearing guide plates hold the one or more piston rod in place on the main bearing. A timing and control mechanism controls flow of compressible fluid to press on the piston and turn the shaft to perform work.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: February 4, 2014
    Assignee: St. Mary Technology LLC
    Inventor: Leroy J Rafalski, Jr.
  • Patent number: 8443713
    Abstract: Disclosed is a small rotary cylinder device wherein friction loss is reduced and energy is conserved by reducing effects of a reaction force applied from cylinders to pistons, which is incorporated in a piston composite body and which linearly reciprocates, the piston composite body being eccentrically connected to a first crank shaft rotating about a shaft. Guide bearings (1c) guide linear reciprocation of first and second piston assemblies (7, 8) attached to second tube bodies (6b), which are caused by rotating a first crank shaft (5) about a shaft (4) and rotating a piston composite body (P) about the first crank shaft (5), in the radial direction of a rolling circle of second imaginary crank shafts (14a, 14b), which has a radius 2r and which is centered at the shaft (4).
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: May 21, 2013
    Assignees: Ikiken Co., Ltd., Yugen Kaisha K. R & D
    Inventors: Hiroshi Ogawa, Fumito Komatsu
  • Patent number: 8162632
    Abstract: A pump is disclosed, having a pumping chamber in the rotor. The rotor is rotatable between first, second, third and fourth positions. When the rotor is in the first position, an inlet cam assembly displaces a piston to draw fluid into the pumping chamber via a first housing inlet. When the rotor is in the second position, an outlet cam assembly displaces the piston to expel fluid out of the pumping chamber via a first housing outlet. When the rotor is in the third position, the inlet cam lobe assembly displaces the piston to draw fluid into the pumping chamber via a second housing inlet. When the rotor is in the fourth position, the outlet cam assembly displaces the piston to expel fluid out of the pumping chamber via a second housing outlet. A method of pumping fluid is also disclosed.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: April 24, 2012
    Assignee: BRP US Inc.
    Inventors: Devlin Hunt, John Feuerstein, Tony Urbanik
  • Patent number: 6752064
    Abstract: A radial, fluid pressure actuated motor having sets of opposed axially aligned cylinders arranged in a spaced relation about a crankshaft, each set of cylinders having a common push rod extending between them. Each push rod has a central Scotch yoke with an elongated slot, the yokes being arranged in overlying spaced relation, the slots being arranged in right angular intersecting relation. A primary or main crankpin extending from the crankshaft extends in journaled but slidable relation through the slots of the Scotch yokes. Fluid pressure is fed into, and exhausted from, each of the cylinders in a predetermined cyclic order, the fluid pressure operating to power, in both directions of travel, axial movement of the push rods thereby imparting continuous rotating motion to the crankshaft via the main crankpin.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: June 22, 2004
    Inventor: Roland T. Wheeler
  • Publication number: 20020168273
    Abstract: Three or more diaphragm pumps (12,14,16) are interconnected to sequentially receive an activation fluid from corresponding piston and cylinder pumps (18,20,22) synchronized by a control mechanism (24) which includes a distributor plate (42) with directive shallow slots (80,82,84) for conduiting activation fluid to a porting plate (44) and via openings (60,62,64) to the piston and cylinder pumps (18,20,22).
    Type: Application
    Filed: April 5, 2002
    Publication date: November 14, 2002
    Inventor: Lawrence P. Olson
  • Patent number: 6212994
    Abstract: A positive displacement rotary machine includes a piston rotor rotatable about a first axis and including a number of pistons equally spaced about the first axis and rotatably mounted about their axes on the piston rotor; a chamber rotor rotatable about a second axis spaced from the first axis, including a central common chamber and a number of radial fluid chambers arranged in diametrically opposed pairs across the common chamber, and guide tracks extending between opposing pairs of radial chambers across the common chamber for kinematically constraining each of the pistons as they move from one of their associated radial chambers to the other through the common chamber, and intake and exhaust ports for introducing and exhausting fluid from the radial chambers.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: April 10, 2001
    Inventor: David A. Estrabrooks
  • Patent number: 6030185
    Abstract: The present invention relates to a pump, more particularly a radial piston pump, including at least two pump pistons (10) with an associated working chamber (13) each, wherein the working chambers (13) are connected to suction lines (4) by way of suction valve devices (8) and to a joint pressure line (5) by way of pressure valve devices (9), wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in one of the associated lines (4, 5), and wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in the pressure line (5).
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: February 29, 2000
    Assignee: ITT Manufacturing Enterprises Inc.
    Inventors: Hans-Jorg Feigel, Lothar Schiel, Ulrich Neumann
  • Patent number: 5375564
    Abstract: The reciprocating engine which is particularly useful as an internal combustion engine, comprises a housing (1) with, mounted to rotate about a first axis of rotation (7), a cylinder rotor (5) having three pairs of cylinders (15) which are angularly offset in respect of one another by 120.degree. about the first axis of rotation (7). Disposed in the cylinders (15) are pistons (17) which are rigidly connected to one another in pairs by piston rods (19). Also mounted in the housing is a crank shaft (23) which is rotatable about a second axis of rotation (25) which is axially parallel with and offset by a predetermined eccentricity (e) in relation to the first axis of rotation (7). The piston rods (19) of the pairs of pistons are guided on the crank shaft (23) by means of eccentric bearings (27, 31). The eccentric bearings (27, 31) define in relation to the crank shaft (23) fixed axes of rotation (33) which, are angularly offset by 120.degree. in respect of one another.
    Type: Grant
    Filed: December 10, 1991
    Date of Patent: December 27, 1994
    Inventor: Josef Gail
  • Patent number: 5177967
    Abstract: A hydrostatic transaxle includes a hydrostatic transmission with a pump and motor, the pump and motor each including a track ring radially surrounding a cylinder in which are disposed a plurality of pistons rotatable on a fixed conduit. The motor track ring includes radially extending lugs disposed 180.degree. from each other that are captured between the upper and lower transaxle casing halves thereby preventing axial or radial movement of the motor track ring.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: January 12, 1993
    Assignee: Tecumseh Products Company
    Inventors: Roland L. von Kaler, Dale I. Havens, Michael P. Weirich
  • Patent number: 4957416
    Abstract: The Compressor comprises three stages of compression, having three cylinders, each of the latter having a piston reciprocable therein. Two of the pistons are in-line along a common axis, and the cylinders therefor are in confronting relationship. The third cylinder lies along an axis which traverses the two-piston axis. All three pistons are reciprocated by two connecting rods, in that the in-line pistons are joined by tie rods. Both connecting rods are coupled to the single crank of a crankshaft which is journalled in a crankcase, and all three cylinders are removably bolted to the crankcase.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: September 18, 1990
    Assignee: Dresser-Rand Company
    Inventors: Bernard F. Miller, John A. Sawyer
  • Patent number: 4829879
    Abstract: An air motor 24 which may be employed in a mine drilling apparatus includes a hollow body 26 formed of a plastic material, and a driven shaft 38 rotatably supported by the body 26 and incorporating a valve assembly 34. The body 26 has opposing pairs of external faces 58 within which are mounted metal cylinder sleeves 29 which receive pistons 30. A cylinder head 31 of plastic material closes each cylinder 29 and a piston rod couples opposing pairs of pistons 30 and engages the shaft 38 so that power may be transmitted to this driven shaft 38.
    Type: Grant
    Filed: May 5, 1987
    Date of Patent: May 16, 1989
    Assignee: Joe Santa & Associates Pty. Ltd.
    Inventor: Jose L. Santa
  • Patent number: 4688471
    Abstract: An air motor having four circumferentially spaced, radially disposed cylinders the respective radially inner ends of which slidingly engage different faces of a cube-shaped cam that is eccentrically mounted with respect to a stationary motor housing. The cam serves as a drive shaft because its eccentric mounting causes it to rotate responsive to air pressure sequentially applied to the radially inner end of pistons that are fixedly mounted in circumferentially spaced relation to a circular piston chassis positioned radially outward of the cylinders. A cylindrical bore formed in the cam is partitioned into a pressure chamber and an exhaust chamber by a shoe seal member.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: August 25, 1987
    Assignee: Dynacycle Corporation
    Inventors: Everett F. Irwin, Irwin Walle
  • Patent number: 4598628
    Abstract: A rotary hydraulic engine is disclosed having a stationary crankshaft with an eccentric crank portion disposed thereon. A housing is rotatable about the crankshaft. At least two pairs of cylinders are connected to the housing and extend quadrilaterally therefrom. A piston is slidingly disposed within each cylinder, and is connected to an oppositely disposed piston so as to move in tandem when propelled by a fluid under pressure. An external valve mechanism is provided which is connected to the cylinders so as to sequentially actuate the pistons contained therein when supplied with fluid under pressure. A scotch yoke assembly integrates the motion of the pairs of pistons into a balanced array of weight and force vectors rotating around the axis of the eccentric crank portion of the stationary crankshaft. This sequential reciprocation of the pairs of pistons imparts a rotary motion to the housing, the rotary motion in turn causing the housing to act as a flywheel.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: July 8, 1986
    Assignee: 4 Square Motors
    Inventor: Harold D. Courtright
  • Patent number: 4589328
    Abstract: A rotary piston engine capable of operating as a fluid pump or motor having a stationary housing in which is concentrically mounted an outer rotatable member to which two pairs of diametrically opposed pistons are fixedly secured and project radially inwardly to each be received in a reciprocating cylinder. The opposed cylinders of each pair of cylinders reciprocate unitarily and the radially inner ends of such cylinders are slidingly and sealingly contacting the adjacent flat surface of a square cam drivingly connected to a rotatable shaft; the cylinders moving in a translatory manner on the flat cam during rotation of the shaft, with the shaft and cylinders rotating unitarily but eccentrically with respect to the outer rotatable member. Suitable ports are provided in the square cam to join the reciprocating cylinders to a source of pressure fluid.
    Type: Grant
    Filed: January 31, 1985
    Date of Patent: May 20, 1986
    Assignee: Dynacycle Corporation
    Inventor: Everett F. Irwin
  • Patent number: 4534272
    Abstract: A rotating cylinder engine having a stationary housing surrounding a rotating cylinder block, which cylinder block rotates unitarily but eccentrically with an output shaft. The housing rotatably mounts both the shaft and the cylinder block. The cylinder block has four equally spaced cylinders therein with each cylinder reciprocally receiving therein a piston. The inner ends of each piston are equipped with abutting surfaces and a roller arrangement is mounted cooperatively with each piston and for unitary rotation with the output shaft. The rollers engage the inner end of the abutting surface on the piston to facilitate relative translatory movement between the pistons and the output shaft which occur during eccentric movement of the cylinder block and the output shaft while transfering driving force between the piston and the output shaft. Passage means in the housing allows pressure fluid therein to flow from a source external of the housing to impose driving loads upon the pistons.
    Type: Grant
    Filed: November 30, 1984
    Date of Patent: August 13, 1985
    Assignee: Dynacycle Corporation
    Inventor: Everett F. Irwin
  • Patent number: 4503754
    Abstract: A rotating cylinder engine having a stationary housing surrounding a rotating cylinder block which rotates unitarily but eccentrically with an output shaft. The housing rotatably mounting both the shaft and the cylinder block. The output shaft has cam flats cooperatively positioned with cylinders in the cylinder block; the cylinders having sealed outer ends. A piston is slideable in each cylinder with its inner end sealingly and slidingly engaging an associated cam flat. Fluid passages in said cam flats alternate from a source of pressured air and from an exhaust. The pistons have a central bore therein confluent with the fluid passages in the cam flats so that pressure can flow through the piston and react between the outer ends of the cylinders and the cam flats, and the cylinder block and the cam flats rotate unitarily but eccentrically. In one embodiment, bridle rings hold the pistons on the cam flats.
    Type: Grant
    Filed: June 1, 1984
    Date of Patent: March 12, 1985
    Inventor: Everett F. Irwin
  • Patent number: 4478135
    Abstract: A general purpose fluid displacement device for use as an external combustion engine, a compound expansion engine, a hydraulic pump, or as an air compressor. At least one bank of circumferentially spaced pistons are operably connected to and radially disposed about a rotor member that is eccentrically disposed to an imaginary circle collectively defined by said pistons such that the amount of eccentricity of said rotor determines the throw of said pistons as the pistons orbit the rotor attendant operation of the device.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: October 23, 1984
    Inventor: Everett F. Irwin
  • Patent number: 4455125
    Abstract: A fluid pressure device of the type having reciprocating pistons disposed in associated cylinders formed in an engine block that rotates conjointly with a drive shaft mounted eccentrically to the spin axis of the engine block. The length of the piston strokes is determined by the offset distance between the spin axis of the engine block and the spin axis of the drive shaft, said respective axes being parallel to one another. At least two axially spaced banks of radially disposed pistons and complementally formed cylinders are provided and base plate means serve to rigidly interconnect axially adjacent pistons of the respective banks. Axially spaced bridle rings retain the opposed ends of the base plates and serve to rigidly interconnect diametrically opposed pairs of pistons. Openings formed in a stationary cylindrical housing transiently align with the rotating cylinders to provide the valving means for the device.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: June 19, 1984
    Inventor: Everett F. Irwin
  • Patent number: 4413486
    Abstract: A fluid pressure device of the type having reciprocating pistons disposed in associated cylinders formed in an engine block that rotates conjointly with a drive shaft mounted eccentrically to the spin axis of the engine block. The length of the piston strokes is determined by the offset distance between the spin axis of the engine block and the spin axis of the drive shaft, said respective axes being parallel to one another.At least two axially spaced banks of radially disposed pistons and complementally formed cylinders are provided, and base plate means serve to rigidly interconnect axially adjacent pistons of the respective banks. Axially spaced bridle rings retain the opposed ends of the base plates and serve to rigidly interconnect diametrically opposed pairs of pistons.Openings formed in a stationary cylindrical housing transiently align with the rotating cylinders to provide the valving means for the device.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: November 8, 1983
    Inventor: Everett F. Irwin
  • Patent number: 4385869
    Abstract: A reciprocation pump has a plurality of radially arranged pumping chambers each provided with a piston and operatively connected to an external liquid absorbing pipe and an external liquid discharging pipe, and has a central drive mechanism comprising drive members each directly connected to the corresponding one of the radially arranged pistons and a valve structure operated in association with the drive members by a pressure activated fluid injected into the pump at an external inlet thereof, said valve structure sending the pressure activated fluid into and out of the pump simultaneously during the operation thereof.
    Type: Grant
    Filed: October 20, 1980
    Date of Patent: May 31, 1983
    Assignee: Far East Engineering Co., Ltd.
    Inventor: Katsumori Omata
  • Patent number: 4339988
    Abstract: A one-piece cylinder block has a central opening providing surfaces on which a crankshaft is journalled and has radially-directed cylinder bores in axially offset pairs extending outwardly from the axis of the crankshaft. A crank pin is formed on the crankshaft eccentric of its central axis and furnishes an axial surface upon which a free eccentric cluster is journalled. The eccentric cluster includes cylindrical surfaces journalled on the crank pin surface spaced axially in alignment with the axis of the cylinder bore pairs, each having its central axis positioned eccentrically of the crank pin axis. Each cylindrical surface of the eccentric cluster has a piston yoke journalled thereon providing a radially directed and diametrically opposed arms, on the outer extremities of which a piston surface is mounted for reciprocating motion within the cylinder bores.
    Type: Grant
    Filed: April 8, 1980
    Date of Patent: July 20, 1982
    Assignee: Ford Motor Company
    Inventor: Duane F. Steele
  • Patent number: 4264283
    Abstract: A pump for liquids including a rotor containing bores housing slidable pistons. A stroke member is associated with the pistons and constraining the pistons, when the rotor rotates, to orbit about an axis parallel to the axis of rotation of the rotor. The spacing between the two axes occasions reciprocation of the pistons within their bores to perform a pumping action. Each piston has coupled thereto a U-shaped member within which is engaged a crosshead of the stroke member. The crosshead is movable slidably within the U-shaped member as the pump operates.
    Type: Grant
    Filed: February 1, 1979
    Date of Patent: April 28, 1981
    Assignee: Lucas Industries Limited
    Inventor: Edward N. Gaffney
  • Patent number: 3977303
    Abstract: A piston and cylinder machine for use as a prime mover, pump or compressor in which there are at least two pairs of pistons and cylinders for each crankpin, the cylinders of each pair being disposed on opposite sides of the crankpin and rigidly connected to each other by a yoke. For each cylinder pair, there is rotatably and eccentrically mounted on the crankpin a disc rotatably received in a respective yoke and whose eccentricity relative to the crankpin is equal to that of the crankpin relative to the crankshaft whereby the piston stroke is twice the crankpin throw. The discs are integral with each other within their superimposed peripheries so that a short, stiff crankpin may be used, and they are out of phase by twice the angular separation of the pairs of cylinders.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: August 31, 1976
    Assignee: Exxon Research and Engineering Company
    Inventor: Archibald John Stephen Baker
  • Patent number: 3964450
    Abstract: This disclosure is directed to a rotary-cam, internal-combustion, radial, 4-cycle, 6-cylinder engine comprising a stationary motor block adapted to operably receive a dual set of pistons, each set thereof being juxtaposed to the other, having their respective rods extending outwardly from the piston chamber and operably attached to a rotatable casing by means of a cam follower secured to the free end of the rod and disposed within a cam channel forming part of the casing, thereby allowing each adjacent piston to simultaneously reciprocate together as the casing rotates with the main drive shaft; and wherein the main shaft incorporates both the fuel-intake system and the motor-exhaust system, said main drive shaft being fixedly connected for rotation with the casing.
    Type: Grant
    Filed: November 19, 1973
    Date of Patent: June 22, 1976
    Inventor: John E. Lockshaw