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| Number | Title | Issue Date |
| 7624672 | Piston apparatus In order to decrease internal friction of a heat engine that converts a reciprocating motion of a piston into a rotational motion, a piston apparatus (1) forms an air bearing between a crankshaft (30) and a bearing unit (9B) provided in a crankc... | 12/01/2009 |
| 7574954 | Compressor A reciprocating compressor is disclosed. The compressor includes a piston mounted to reciprocate inside of a cylinder that draws a working fluid into an inside of the cylinder, compressing, and discharging the working fluid to an outside of the cylinder, a connectin... | 08/18/2009 |
| 7458313 | Tubular piston for a piston engine and method producing a tubular piston The invention relates to a tubular piston for a piston engine, comprising a tubular section, a collar shaped region and a ball pivot formed thereon, and an inner tube arranged in an outer tube. A cavity is at least partially formed between the outer tube and the inn... | 12/02/2008 |
| 7367305 | Internal combustion engine and connecting rod therefor A connecting rod of an internal combustion engine, and an internal combustion engine including the connecting rod, a piston, a crankshaft and a float bearing as main moving parts. A piston is connected to a connecting rod by a spherical joint and has radial ribs on ... | 05/06/2008 |
| 7364409 | Piston assembly for rotary hydraulic machines A piston assembly for a hydraulic machine is formed with a part spherical cavity in the piston to receive a spherical bearing of a slipper assembly. The spherical bearing is secured in the cavity by swaging the walls of the piston and subsequently working the wall t... | 04/29/2008 |
| 7290518 | Piston-connecting rod spherical coupling structure A spherical coupling structure for a piston and a connecting rod, wherein a protrusion provided to the reverse side of a crown of a piston and a holding member for holding a small end are slidably fitted onto a small end, and a holding/fastening part for holding the... | 11/06/2007 |
| 7191741 | Pin connected link mechanism A link mechanism usable for a variable compression ratio mechanism of an internal combustion engine includes first and second links pivotally connected by a pin inserted through cylindrical first and second pin boss portions of the first and second links. Each of th... | 03/20/2007 |
| 7152567 | Piston for an internal combustion engine The invention relates to a piston for an internal combustion engine comprising piston-pin bores, into which lubrication grooves that run around the nadir and equator zones of said bores are machined. The aim of the invention, is to simplify the production of the pis... | 12/26/2006 |
| 7137197 | Method of manufacturing a piston having a hollow piston head A method of manufacturing a piston using a swaging tool includes the step of positioning a portion of a first member and a portion of a second member of the piston within a first end of an opening formed through the swaging tool, such that a reduced diameter portion... | 11/21/2006 |
| 7086368 | Piston for an internal combustion engine A piston for an internal combustion engine includes a crown, tubular walls extending from the edge of the crown, and a cup portion protruding from the rear surface of the crown and having a concave spherical surface for forming a spherical joint with a spherical sma... | 08/08/2006 |
| 7052250 | Reciprocating compressor A reciprocating compressor, being small-sized and compact, for compressing hydrogen gas to be used in a fuel-cell car, has a crankshaft, to which an end of a connecting rod is connected. The other end of the connecting rod is connected to a crosshead. To the crosshe... | 05/30/2006 |
| 6571684 | Crosshead piston and bearing assemblies A crosshead piston assembly has a piston body with an upper head portion formed with a plurality of piston rings and a lower stem portion formed with a pin bore. The pin bore has a pair of lower, laterally spaced mounting ears presenting a bearing support... | 06/03/2003 |
| 6446542 | Piston unit A device for pivotal connection of piston (1) and connecting rod (10) in a reciprocating-piston engine comprises a connecting member (6) integral with the piston, with a bearing surface (9) for a connecting-rod eye (11), which together with the bearing su... | 09/10/2002 |
| 6431051 | Closed cavity hydraulic piston and method of making the same A hydraulic piston for a cylinder block of a hydrostatic power unit has an elongated cylindrical body with first and second ends. An elongated cavity is formed in the body. A cap is adhered to the body to close the cavity. The cap has an external shape to... | 08/13/2002 |
| 6382081 | Reciprocating compressor A reciprocating compressor (K1-K3) comprising a connecting rod (21) in which a small end portion (22) having a small hole (22a) and a large end portion (25) having a large hole (25a) are coupled with each other; wherein the small end portion (22) is coupl... | 05/07/2002 |
| 6354186 | Hydrostatic thrust bearing for a wobble plate pump A displacement pump has a rotatable drive shaft and at least one piston containing a piston cavity, and a piston shoe flexibly connected with the piston. The piston shoe comprises a shoe passage fluidly connected with the piston cavity. The displacement p... | 03/12/2002 |
| 6314864 | Closed cavity piston for hydrostatic units A closed cavity piston assembly includes a piston body, a separately formed piston cap sealingly joined to the body, and an elongated stem integrally formed with one of the piston body or the cap. In one embodiment, the stem is integrally formed with the ... | 11/13/2001 |
| 6237467 | Hydrostatic machine piston The invention relates to a piston for a hydrostatic machine and a corresponding production method. In a conventional production method of this type, the piston is shaped from a blank into a shank section and a ball and socket joint section connected to th... | 05/29/2001 |
| 6024011 | Hydrostatic axial piston machine This invention relates to a hydrostatic axial piston machine that utilizes a swash plate construction with a plurality of axially movable pistons mounted in a cylinder drum. The pistons are each supported on a slide face by individual sliding blocks and a... | 02/15/2000 |
| 5743168 | Device for lubricating an assembly between two mechanical components which can move with respect to each other, especially a connecting rod/piston articulation A device including a first moving part such as a piston (1) and a second moving part such as a connecting rod (2) with a coupling part (4) therebetween. A low-pressure compressible liquid lubricant feed system delivers a liquid into a chamber (10) with a ... | 04/28/1998 |
| 5713262 | Engine piston having a recess defined in the lower surface of the head A piston, which reciprocates in a cylinder bore of an engine, is supplied with lubricating oil. The piston includes pin bosses provided under a piston head, a symmetrical pair of skirts, and side walls connecting the pin bosses and the skirts. The side wa... | 02/03/1998 |
| 5702238 | Direct drive gas compressor with vented distance piece A reciprocating piston gas compressor driven by an integral internal combustion engine is disclosed. The compressor may be used as an air compressor but has particular application for compressing natural gas from natural gas wells. It has few moving parts... | 12/30/1997 |
| 5694829 | Piston and piston pin arrangement for reciprocating machine A number of embodiments of piston pin piston connections and lubricating arrangements for lubricating the piston pin. The piston pin connections are such so as to minimize localized wear on the piston. The lubricating arrangement is configured so as to de... | 12/09/1997 |
| 5669285 | Spherical joint connecting rod holder rings Spherical joint connecting rod holder rings. The holder ring is formed in two halves which define a socket in which a spherical small end of the connecting rod is retained. The ring further includes a vertical wall which acts as an oil dam to retain oil i... | 09/23/1997 |
| 5490446 | Apparatus and method for a piston assembly An apparatus and method is provided for producing a piston assembly for use in a fluid translating device such as a hydraulic pump or motor. In the subject arrangement, a piston is provided having a cavity at one end thereof and a slipper having a spheric... | 02/13/1996 |
| 5427067 | Piston and a connecting rod assembly An assembly including a piston having a crown surface, a bottom surface, and a skirt projecting therefrom and defining therewith a cavity; a cup-shaped housing retained in the cavity and having a bottom wall engaging the bottom surface and a side wall eng... | 06/27/1995 |
| 5417309 | Lubrication system for a conjugate drive mechanism A conjugate drive mechanism of a scotch yoke type motion converter includes a conjugate driver, which is rotatably mounted on a crankpin, and a bearing conjugate, which is mounted on a linearly movable shuttle. The conjugate drive mechanism is lubricated ... | 05/23/1995 |
| 5365892 | Rotary internal combustion engine An internal combustion engine has at least one piston (15, 16) which moves back and forth in a cylindrical piston bore (13, 14) and drives a rotationally supported crankshaft (30) through a connection rod (24, 25). The piston bore (13, 14) is arranged in ... | 11/22/1994 |
| 5313875 | Piston with support member and bearing A piston for an internal combustion engine has a crown and peripheral wall to carry a piston ring. A support extends between the wall and a bearing housing to receive the connecting rod. A cylindrical support member also extends from the wall around the s... | 05/24/1994 |
| 5265700 | Lubrication for crankpin bearing of connecting rod A connecting rod for connecting a reciprocating piston to a rotating crankshaft of an internal combustion engine includes an improved lubrication distribution system for conveying lubrication into its crankpin bearing. The lubrication is distributed by me... | 11/30/1993 |
| 5265331 | Method of manufacturing a piston for an axial piston fluid translating device Hydraulic piston pumps and motors are used in various applications to power implements, steering, propel, and auxiliary systems. However, it is important to keep the piston weight and compressible fluid volume low in order to have a smaller more efficient... | 11/30/1993 |
| 5247873 | Connecting rod assembly with a crosshead A spherical joint and bearing assembly utilizes a ball and socket arrangement between a connecting rod and a crosshead in a power reciprocating fluid pump. The connecting rod is spherically shaped and is held in a thrust bearing having a matching interior... | 09/28/1993 |
| 5216943 | Piston for hydrostatic axial and radial piston machines and method for the manufacture thereof A method of manufacturing a piston for hydrostatic axial and radial piston machines by non-machining forming, by filling a material that is in a substantially unresistant, formable state into a mold defining a piston outer contour which is closed on all s... | 06/08/1993 |
| 5209155 | Radial piston engine In a radial piston engine having pistons bearing against the circumference of an eccentric, which pistons execute a swivelling motion upon the rotational motion of the eccentric and are in engagement with a guide body, which bears on the radially outer en... | 05/11/1993 |
| 5195420 | Piston compressor, particularly an oil-free piston compressor The crank mechanism of the piston compressor comprises individual crank disks (5), which each support on their outer circumference a rolling bearing (6) for the bearing of a connecting rod (4). The crank disks (5) are pressed together to form a package by... | 03/23/1993 |
| 5115725 | Piston and connecting rod assembly An arrangement wherein a concave portion on a support end of a connecting rod is slidably engaged with a convex portion formed in a lower part of a piston, and a retainer ring member supported on a skirt portion of the piston is placed in contact with the... | 05/26/1992 |
| 5072654 | Piston and bearing assemblies A novel prefinished piston pin insert bearing is described wherein the tight radial clearances required for acceptable bearing function are maintained in spite of the tolerances required for assembly through a unique inner bearing surface geometry and thr... | 12/17/1991 |
| 5054289 | Hydraulic transmission When a first rotating shaft is rotationally driven, it rotates a first cylinder barrel splined thereto, and a second cylinder barrel and a valve block united with the first cylinder barrel. In accordance with these rotations, first pistons in first cylind... | 10/08/1991 |
| 5046930 | Connecting rod cooling and lubrication A connecting rod having lubricating passages therein for cooling the piston assembly of a compressor. A central lubricating passage provides fluid communication between the crankshaft end portion and piston end portion of the connecting rod. The central l... | 09/10/1991 |
| 5039285 | Lubrication system of connecting rod, piston, and wrist pin for a compressor The present invention is an improved lubrication system for a connecting rod, wrist pin, and piston of a compressor. An oil pump pumps lubricating oil upwardly within an axial bore of the crankshaft, which includes a radial passageway in alignment with th... | 08/13/1991 |
