Pump And Cylinder Coaxial Patents (Class 123/71R)
  • Patent number: 5884590
    Abstract: An oscillating lever arm engine includes rigidly connected opposing pistons moved by a single lever connected to a rotating crankshaft. When applied to a two-cycle internal combustion engine, one piston may function as a pump piston and the second piston as a working piston which delivers power to the crankshaft through a connecting rod. When the pump piston is chosen to be of larger diameter, the volumetric efficiency of drawing in and providing the intake charge to the working piston may be increased. Furthermore, when poppet-type exhaust valves are used, valve timing may be selected so that the exhaust valves close before the cylinder wall transfer ports to achieve a supercharging effect.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: March 23, 1999
    Inventor: Mihai C. Minculescu
  • Patent number: 5791303
    Abstract: A two-cycle internal combustion engine comprises a cylinder with a piston, the cylinder having a port in which an intake valve is placed for feeding a fuel-air mixture from an intake manifold into an intake chamber. The intake chamber is positioned under the position, is isolated from a crank chamber and communicates with a combustion chamber. The combustion chamber is positioned above the piston and communicates with the intake chamber by means of a by-pass manifold, at the inlet of which an intake valve is placed for feeding a fuel-air mixture. An additional piston is provided which is positioned in the cylinder between the crank chamber and the main piston and is rigidly connected to the main piston. A second intake chamber is positioned between the first intake chamber and the additional piston. The second intake chamber isolated from the first intake chamber by means of a partition and communicates with the intake manifold and with the by-pass manifold.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: August 11, 1998
    Inventor: Jury Nikolaevich Skripov
  • Patent number: 5785505
    Abstract: An integral fluid pump is disposed in the cylinder head of an internal combustion engine is directly driven by an engine piston and provides fluid flow to a fluid system. First and second check valves are connected to the cylinder head and control fluid flow between a reservoir, the fluid pump, the fluid system. The integral fluid pump is particularly suited for providing fluid flow to an engine lubricating system.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: July 28, 1998
    Assignee: Caterpillar Inc.
    Inventor: Robert J. Price
  • Patent number: 5778834
    Abstract: In order to reduce the overall dimensions and the weight of a motion transmission system including piston, a tie-rod and a crankshaft, the crankshaft and a single tie-rod are arranged inside two mutually opposite pistons which constitute one single monolithic element reciprocating inside two mutually opposite cylinder. The machine can operate as an endothermic motor with atmospheric feed, as a self-supercharged endothermic motor, as a hydraulic motor, or as a self-driven compressor, or as a compressor which can be driven by an externally applied motor.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: July 14, 1998
    Inventor: Giuseppe Raoul Piccinini
  • Patent number: 5694891
    Abstract: In an internal combustion engine having at least one working cylinder, a reciprocating working piston is connected by a piston rod to a second piston which can reciprocate in a supercharge cylinder. The common piston rod is also connected with a crank drive of the internal combustion engine. Corresponding inlet, outlet and connecting channels are provided on the working cylinder and the supercharge cylinder. The inlet channel discharges into the wall of the supercharge cylinder at a location which is unblocked at the top dead center position of the working piston or of the supercharge piston. Located between the working cylinder and the supercharge cylinder is a combustion mixture connecting channel which connects an opening at the end of the supercharge cylinder to an inlet arranged in the working cylinder. The inlet is unblocked when the working piston is at the bottom dead center position.
    Type: Grant
    Filed: June 19, 1996
    Date of Patent: December 9, 1997
    Inventor: Max Liebich
  • Patent number: 5509382
    Abstract: An internal-combustion engine having a main cylinder, a crosshead motor piston mounted on a piston rod, and a charger piston, which reciprocates below the motor piston and has a hole for the piston rod to slide through, is shown in full section in FIG. 1. The piston rod is connected through a motor connecting rod to a short-throw motor crankpin that separates a pair of long-throw charger crankpins that follow it by eight degrees and are connected through a pair of charger connecting rods to the charger piston. The pistons separate as they descend thereby opening a charger cavity wherein a fuel-air charge is drawn via intake ports through the main-cylinder wall. As the pistons rise, the intake ports are blocked; the charge is compressed and forced upward past the motor piston into a hot combustion chamber through transfer channels along the main-cylinder wall that remain blocked by the motor piston until it approaches its zenith.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: April 23, 1996
    Inventor: Ronald D. Noland
  • Patent number: 5285752
    Abstract: A single piston internal combustion engine is described that produces two power impulses per revolution of the crankshaft, precise mechanical balance, zero side thrust upon the piston, and purified exhaust gas. The lubrication oil is isolated from contamination by blowby and fuel dilution. Total engine cooling is obtained from the lubrication oil. The engine is free from shock loads as it is cushioned by continuously compressing gas in preparation for the next combustion event. The engine is uniflow-scavenged utilizing piston pumps whose fresh air intake is controlled by rotary valves. The piston pumps possess compact aftercoolers used in combination with supercharging. The exhaust header assists in silencing the engine and removes fluctuations in exhaust pressure. A computer-aided specialized mechanical balance methodology is disclosed that obtains counterbalance weights to optimally reduce engine shaking forces.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: February 15, 1994
    Assignee: Single-Stroke Motors, Inc.
    Inventors: Jay L. Reed, Roger A. Villecco, Robert V. Frierson
  • Patent number: 5243938
    Abstract: An internal reciprocating engine effective to operate at one engine cycle per revolution is provided with a differential stroke piston having an inner piston part, for sealing the cylinder, operating at a cycle different from its corresponding outer piston part, for transmitting power to and from the engine shaft, and a differential stroke actuating means for operating the inner and outer piston parts in the same and the opposite directions within the cylinder and to provide differential stroke periods and/or stroke lengths for the inner piston part cycle.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: September 14, 1993
    Inventor: Miin J. Yan
  • Patent number: 5233949
    Abstract: A balanced motor two-stroke cycle engine having a linear drive includes a sealed gearcase secured to a cylinder housing having a plurality of concentric cylinders. The sealed gearcase includes a fixed ring gear, a pinion gear whose diameter is equal to the radius of the ring gear, a hub on which a piston rod is journaled for rotation, and two sets of counterweights. The piston rod moves in a linear fashion as the pinion gear rotates inside the fixed ring gear. The piston rod extends into the innermost cylinder, and a piston secured to the piston rod reciprocates linearly in the innermost cylinder. A chamber between the piston and the gearcase receives a flow of air and the air is transferred to the cylinder beneath the piston through a plurality of ports or apertures for compression. Fuel is injected into the cylinder from a pump chamber by a diaphragm that moves in response to air pressure in the cylinder beneath the piston.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: August 10, 1993
    Inventor: Richard D. Rucker
  • Patent number: 5167208
    Abstract: An internal combustion engine is arranged with an elongate piston rod, with the piston fixedly mounted substantially medially of the rod, with an upper distal end of the rod including an oil reservoir chamber piston reciprocatably mounted within the oil reservoir chamber. The piston defines a combustion chamber between the piston and a crank case member rotatably mounting a crank shaft, with the piston rod rotatably mounted to the crank shaft at a lower distal end of the piston. Oil flow is directed through an oil delivery conduit into the oil reservoir chamber and through a conduit within the piston rod to enhance cooling of the piston maintaining its longevity during use.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: December 1, 1992
    Inventor: Randolph R. Rasiah
  • Patent number: 5050570
    Abstract: An open-cycle internal-combustion Stirling engine having two pistons coupled by a rhombic drive which define a combustion chamber and a compression chamber, within either a single cylinder or two cylinders, and a manifold enabling flow of the working fluid between the compression chamber and the combustion chamber with a plurality of engine valves controlling such flow, the dead space of the manifold being minimized and provision of the working fluid (i.e., air) being provided by an intake valve and an exhaust valve with corresponding manifolds for providing the open-cycle characteristics of the engine while approximating an ideal thermo-dynamic system.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: September 24, 1991
    Inventor: Robert H. Thring
  • Patent number: 5010852
    Abstract: A multifuel hybrid heat engine having an internal combustion system and an external combustion system wherein a coaxial array of three tappet valves controls the expansion from the external combustion system to the internal combustion system and the drive of the common piston member which cooperates with a working cylinder and another cylinder coaxial therewith and received within the working cylinder. The piston member with its inner and outer pistons cooperates with these cylinders to define not only upper cylinder motors but also lower cylinder motors and air compressors for scavenging the air supply.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: April 30, 1991
    Inventor: Milorad S. Milisavljevic
  • Patent number: 4915064
    Abstract: A combustion engine comprises a plurality of cylinders. Each cylinder contains aligned pistons displaceable toward and away from one another. Rotary cam disks are connected to a drive shaft and are arranged to be contacted by respective ones of the pistons for transferring motion therebetween. Each cam disc includes a cam curve arranged to be engaged by respective pistons of each pair of pistons. Each cam curve has circumferentially spaced peaks and valleys interconnected by an interconnecting surface with which the cams make contact during a power stroke. The interconnecting surface is of concave configuration and presents a slope which progressively decreases from adjacent the peak to adjacent the valley.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: April 10, 1990
    Inventors: Folke K. E. Mannerstedt, deceased, by Margareta Zinnerstrom, executrix
  • Patent number: 4858571
    Abstract: An internal combustion engine having as upper cylindrical gas chamber and a lower cylindrical gas chamber. The upper chamber having a bottom portion serving as the combustion chamber. A cooling jacket is provided between the two chambers to cool the sealing means therebetween. An inter-chamber passageway for direct communication between the bottom portion and lower chamber is provided.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: August 22, 1989
    Inventor: Tai-Her Yang
  • Patent number: 4841921
    Abstract: An internal combustion engine having as upper cylindrical gas chamber and a lower cylindrical gas chamber. The upper chamber having a bottom portion serving as a compression chamber and the lower chamber serving as a combustion chamber. A cooling jacket is provided between the two chambers to cool the sealing means therebetween. An inter-chamber passageway for direct communication between the bottom portion and the lower chamber is provided. A pumping turbine is provided for pumping fuel/air mixture into the bottom portion of the upper chamber.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: June 27, 1989
    Inventor: Tai-Her Yang
  • Patent number: 4829958
    Abstract: A device and method for introducing pressurized gas into a combustion chamber of an engine. The device includes a duct and an intermittent obstruction member, with the placing the cylinder and the combustion chamber in communication via said obstruction member.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: May 16, 1989
    Assignee: Institut Francais du Petrole
    Inventor: Pierre Duret
  • Patent number: 4785770
    Abstract: A two-cycle engine having upper and lower cylindrical gas chambers controlled by an inter-chamber passageway. The lower gas chamber acts as the combustion chamber. The upper gas chamber is divided into two parts by a piston wherein the lower portion of the upper chamber acts as a compression chamber for fuel and air introduced therein. The combustion products are expelled from the lower chamber via an exhaust port in a bottom part of the lower gas chamber.
    Type: Grant
    Filed: January 8, 1986
    Date of Patent: November 22, 1988
    Inventor: Tai-Her Yang
  • Patent number: 4777917
    Abstract: Four power cylinders within an engine and/or cylinder block are distributed around a central bore containing a rotary valve whose axis of rotation is parallel to that of each of the cylinders. Supercharger cylinders are axially aligned with the power cylinders and pistons within the power cylinders are connected by a rod to pistons within the supercharger cylinders and driven by a common power means. The power means drives alternate cylinders around the valve in phase and intermediate cylinders 180.degree. out of phase. Air intake means through the rotary valve is fed into ports of opposite supercharger cylinders through a Y-shaped passage. Compressed air or a fuel mixture from the supercharger cylinders is fed through a passageway to the power cylinders in intake phase. If a four stroke cycle engine is involved, the passage may be Y-shaped connecting two supercharger cylinders to a single power cylinder.
    Type: Grant
    Filed: May 28, 1986
    Date of Patent: October 18, 1988
    Inventor: Thomas V. Williams
  • Patent number: 4745886
    Abstract: An internal combustion engine having an upper cylindrical gas chamber and a lower cylindrical gas chamber. The upper chamber having a bottom portion serving as a compression chamber and the lower chamber serving as the combustion chamber. A cooling jacket is provided between the two chamber to cool the sealing means therebetween. An inter-chamber passageway for direct communication between the bottom portion and lower chamber is provided.
    Type: Grant
    Filed: October 25, 1985
    Date of Patent: May 24, 1988
    Inventor: Tai-Her Yang
  • Patent number: 4516539
    Abstract: An internal combustion engine having a pair of opposed ignition pistons and a pump element that reciprocates coaxially in opposition to the pistons. A pair of counterbalance arms are linked to the pump element to also reciprocate in opposition to the pistons. A counterbalance linkage includes rocker arms which are pivotally connected to the housing and which are pivotally and slidably connected to the pump element and the pistons. The engine includes a pair of opposed combustion pistons which reciprocate in synchronism with the ignition pistons and a manifold supplies an ignited fuel/air charge from the ignition to the combustion pistons.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: May 14, 1985
    Inventor: John F. Andreen
  • Patent number: 4332229
    Abstract: An I.C. engine has a block, the engine forming a bore and having a crankshaft. The engine includes:(a) first and second pistons that reciprocate in that bore,(b) connection structure interconnecting the pistons, the pistons operatively connected to the crankshaft,(c) valve casing structure operatively coupled to the block, there being a first zone in the bore between the casing structure and one piston, and a second zone between the casing structure and the other piston,(d) the valves associating with the casing structure adapted to pass intake air into one of such zones and to exhaust compressed air out of the other of the zones in response to piston movement in one direction, and adapted to pass intake air into the other of the zones and to exhaust compressed air from that one zone in response to piston movement in the opposite direction.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: June 1, 1982
    Inventor: Johannes Schuit
  • Patent number: 4210108
    Abstract: A two-stroke internal combustion engine having a stepped piston in which the cylinder casting has a bore of greater diameter to form a pumping part, a bore of lesser diameter to form a working part, exhaust port means in the working part and opposed transfer port means on opposite sides of the working part disposed symmetrically about a plane passing through the longitudinal axis of the cylinder and center of the exhaust port means, the transfer port means being of a form to be produced in the casting process by non-separate cores introduced linearly towards the plane.
    Type: Grant
    Filed: September 21, 1978
    Date of Patent: July 1, 1980
    Inventor: Bernard Hooper
  • Patent number: 4206727
    Abstract: The invention provides a two-stroke-cycle engine which has a main piston, and an auxiliary piston and transfer valve arrangement. and its associated drive mechanism. The engine has also at least two intake valves arranged in the cylinder head. The auxiliary piston and transfer valve assembly comprises an auxiliary piston having an external hollow stem linearly slidable in a bushing mounted in said cylinder head and the transfer valve is provided with a stem freely slidable within said hollow stem.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: June 10, 1980
    Inventor: Miguel Siegien
  • Patent number: 4205638
    Abstract: A double acting Diesel cycle hot gas engine comprising a plurality of engine cylinders, each having a free piston unit adapted to perform work, providing a continuous flow of compressed air to an energy consumption source and to a storage tank connected therewith. The free piston unit includes an air compression piston and a power piston, spaced apart from each other and adapted to move together within each respective engine cylinder through a connecting rod extended therebetween in response to the movement of a working medium under a substantially constant pressure acting against one side of the power piston and to the pressure and expansive power generated by the burning gases of an air fuel mixture acting on the opposite side of said power piston. Cycle control means are provided to release the potential energy accumulated within the working medium which is initially used to drive the power piston to compress the air fuel mixture and thus, initiating the operative cycle of the engine.
    Type: Grant
    Filed: November 18, 1977
    Date of Patent: June 3, 1980
    Inventor: Giovanni Vlacancinch
  • Patent number: 4185597
    Abstract: Internal combustion engine apparatus includes a dual piston with a plurality of intake ports having reed type check valves.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: January 29, 1980
    Inventor: Vincent J. Cinquegrani
  • Patent number: 4156410
    Abstract: An internal combustion engine having a housing defining a pair of axially aligned and opposing cylinders with a lubricant chamber therebetween, a stationary piston in the housing extending through the lubricant chamber and having opposite ends disposed within the aligned cylinders, and a hollow cylindrical piston slidably received within the housing and around the stationary piston for reciprocal movement thereby forming a pair of first variable volume chambers between it and the aligned cylinders and a pair of second variable volume chambers between it and the stationary piston. A carburetor communicates with the second chambers through longitudinal passageways in the stationary piston so as to admit a charge of combustible fuel therein which is compressed and then injected into the first chambers for recompression and subsequent combustion, the compression and combustion cycles for the chambers on opposite ends being 180.degree. out of phase.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: May 29, 1979
    Assignee: Ran-Z, Inc.
    Inventor: Charles R. Ramsey
  • Patent number: 4138972
    Abstract: The subject fuel injection means, disclosed herein with one of various types of internal combustion engines with which it may be employed, comprises a fuel pumping plunger, the pumping stroke of which is controlled by an inclined surface of a manually operable slide element. Said plunger is urged in a pumping direction by fluid pressure applied thereto from compression generated in the engine's combustion chamber and is spring biased in a non-pumping direction. A solenoid, operationally timed to the rotation of the engine's crankshaft, coacts with the pumping plunger to assure starting of the plunger's pumping stroke in proper timed relation to the compression and firing of an explosive charge in the engine's combustion chamber. In said pumping stroke, the plunger closes a fuel inlet to a related pump chamber and forces fuel from said pump chamber, past a one way check valve and into the engine's combustion chamber.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: February 13, 1979
    Inventor: Ora E. Wilson
  • Patent number: 3981280
    Abstract: A two-stroke combustion engine with intake and exhaust ports which are indirectly or directly controllable in accordance with the reciprocating motion of a working piston in a cylinder space, wherein at one side of the piston there is a working chamber accessible to an ignition device and connectible to an outlet, and at the other side of the piston there is a compression chamber, and wherein there is associated with the working piston at least a second auxiliary piston functioning as a compression piston, which operates in a compression chamber at least in a single acting mode.
    Type: Grant
    Filed: February 19, 1974
    Date of Patent: September 21, 1976
    Inventor: Walter Franke
  • Patent number: 3959974
    Abstract: An internal combustion engine utilizes a combustion cylinder formed in part of material which can withstand high temperatures in conjunction with a displacement or power piston having a ringless section capable of withstanding high temperatures and being backed up by a relatively low temperature lubricated ringed piston section. Means to inject fuel and water into the combustion chamber is provided along with means to charge the combustion chamber with air and to exhaust the combustion chamber near the end of the power stroke.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: June 1, 1976
    Inventor: Luther B. Thomas