Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7434562 | Internal combustion engine with parallel crankshafts An internal combustion engine which includes two parallel crankshafts positioned in crankcases, a cylinder positioned on a side of the crankcases, a piston movably disposed within the cylinder, and connecting rods linked to the piston and extending from respective c... | 10/14/2008 |
| 7434549 | Opposed double piston internal combustion engine An internal combustion engine including at least one engine cylinder includes a cylinder cavity with first and second stopping members interconnected by a cylinder wall, the cylinder further includes two piston members slidably moveable within said cylinder cavity a... | 10/14/2008 |
| 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 |
| 7341037 | Engine piston and manufacture An engine piston is manufactured by assembling an outer shell, comprising a crown and tubular side wall in which a ring groove region and skirt are defined, with a plate-like mounting member and bonding them together by brazing or welding. The mounting member is loc... | 03/11/2008 |
| 7328672 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 02/12/2008 |
| 7325517 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 02/05/2008 |
| 7318397 | High efficiency high power internal combustion engine operating in a high compression conversion exchange cycle A piston (10), a spring (15) operatively coupled to a piston, the spring being inside (21) or outside (41) the piston, and if the spring is inside the piston, the diameter of the spring is equal to 0.7 to 0.9, and if it is outside of the ... | 01/15/2008 |
| 7213562 | Piston for a combustion engine and casting method for the production thereof The invention relates to a piston (1), which is comprised of an approximately circular cylindrical upper area (5) and of a lower area (6), having two hubs (7), which are set back toward the piston central axis (8) so that, in the u... | 05/08/2007 |
| 6997158 | Diesel combustion chamber A combustion chamber assembly for use in a diesel engine includes a combustion chamber being defined intersecting a crown of a piston, the combustion chamber being defined by a first curved surface having a reentrancy formed proximate a first curved surface first en... | 02/14/2006 |
| 6935299 | Spring-supported crankshaft coupling structure for engine A spring-supported crankshaft coupling structure used in an engine and coupled between a piston and a crankshaft to enhance the output torque of the engine is disclosed to include a connector axially movably coupled to the piston by a slip joint, a stop device fixed... | 08/30/2005 |
| 6923153 | Piston and connecting rod assembly having phosphatized bushingless connecting rod and profiled piston pin The present invention relates to a connecting rod and piston pin assembly for an internal combustion engine to improve wear of the piston/connecting rod pivot point and reduce deformation of the pin bore. To this end, the assembly includes a piston having a pin bore... | 08/02/2005 |
| 6832592 | Crankshaft coupling structure for use in an internal combustion engine A crankshaft coupling structure used in an engine and coupled between a piston and a crankshaft to enhance the output torque of the engine is disclosed to include a connecting rod, the connecting rod having a top end coupled to the piston by a slip joint and a botto... | 12/21/2004 |
| 6651607 | Connecting rod with increased effective length and engine using same A crankshaft 12, a piston 14, and a connecting rod 16 coupling the piston to the crankshaft. The piston 14 has an arcuate track slot 40 that receives and guides a rider pin 42 coupled to the connecting rod 16. The rider pin 42 travels side-to-side along t... | 11/25/2003 |
| 6474288 | Internal combustion engine that completes four cycles in one revolution of the crankshaft An internal combustion engine that completes four cycles, intake, compression, expansion and exhaust in one revolution of the crankshaft is disclosed. The combustion chamber is formed with four parallel vanes joined at their ends by shared bearings and pi... | 11/05/2002 |
| 6209510 | Piston and connecting rod assembly A piston and connecting rod assembly includes a piston crown, a piston skirt, a connecting rod, and a bearing insert. The piston skirt is a component separate from the piston crown and is connected to the piston crown to provide a piston body. The bearing... | 04/03/2001 |
| 6131544 | Connecting-rod and piston assembly The present invention relates to a connecting rod and piston assembly that comprises a cylinder and a piston, the piston comprising a head, a skirt and a support element. The piston is attached to the connecting rod by a pin, the connecting rod being moun... | 10/17/2000 |
| 5934229 | Double circular slider crank reciprocating piston internal combustion engine The invention relates to a internal-combustion engine, particularly to a reciprocating piston type internal combustion engine having a crank circular slide block which replaces the connecting rod. It comprises the cylinder body; the cylinder, the piston, ... | 08/10/1999 |
| 5794582 | Connecting structure of piston and connecting rod An internal combustion engine includes a piston having a crown portion with a bottom surface and a skirt projecting therefrom to form a cavity, and a connecting rod having at one end a semicylindrical yoke portion with an upwardly directed semicylindrical... | 08/18/1998 |
| 5769048 | Rocking piston engine and rocking-piston compressor The present inventions concern rocking-piston engines and rocking-piston compressors of high efficiency. This is achieved by an arrangement in which the piston crown lies on a circular cylinder whose center coincides with the center of the connecting rod ... | 06/23/1998 |
| 5655496 | Compact internal combustion engine An engine which employs a cam follower mechanism to reduce wear and reduce the size of an assembled engine. The cam follower mechanism utilizes guide rails located to reduce side thrust on the valve stem. The engine employs a high speed quill shaft to syn... | 08/12/1997 |
| 5546897 | Internal combustion engine with stroke specialized cylinders A multi-cylinder reciprocating piston internal combustion engine is divided into a working section and a compressor section, with the working section supporting the combustion function and the compressor dedicated solely to infusion of intake charge into ... | 08/20/1996 |
| 5431130 | Internal combustion engine with stroke specialized cylinders A multi-cylinder reciprocating piston internal combustion engine is divided into a working section and a compressor section, with the working section supporting the combustion function and the compressor dedicated solely to infusion of intake charge into ... | 07/11/1995 |
| 5413074 | Piston and a connecting rod apparatus A groove in a direction of a crank shaft is provided in an inner surface of a top wall of a cup-shaped inner sleeve. The groove provides a stop for a semicylindrical slidable guide member that cooperates with a cylindrical concave portion of a cylindrical... | 05/09/1995 |
| 5347960 | Double-acting piston engine A double-acting piston engine has a crankshaft rotatable about a first central axis and having a crankpin having a second central axis which is spaced a distance from the first central axis, a cylinder assembly having a pair of cylinder chambers confronti... | 09/20/1994 |
| 5279268 | Piston assembly with distributed loading and centrally fastened wrist pin The design and construction of past piston assemblies having a wrist pin bolted to a connecting rod had excessive structural components requiring more complex machining procedures and tooling. Additionally, the loading and bolting patterns allowed the wri... | 01/18/1994 |
| 5239958 | Delay stroke piston and rod for engine A reciprocating piston internal combustion engine comprises a cylinder having opposed ends, a piston reciprocably mounted in the cylinder, a connecting rod having a crank journal end and a piston journal end, the connecting rod connected to the piston at ... | 08/31/1993 |
| 4867121 | Piston system for use in an internal combustion engine A piston system for use in an internal combustion engine comprises a flexible piston disposed adjacent a combustion chamber of the engine and a piston drive means movably disposed adjacent the flexible piston such that the drive means can deform the flexi... | 09/19/1989 |
| 4711201 | Two-cycle engine A two-cycle engine includes an engine body having at least one cylinder, the cylinder having an exhaust port and at least one scavenge port disposed generally in opposed relation to the exhaust port. A piston is received in the cylinder for reciprocal mov... | 12/08/1987 |
| 4635596 | Assembly of piston and connecting rod in internal-combustion engine In an internal-combustion engine, a piston pin of each piston is integrally and rigidly fixed to the small end of a connecting rod. The piston pin is pivotally coupled to the piston by way of a metal bearing interposed therebetween, and is held thus in co... | 01/13/1987 |
| 4559686 | Method of assembling a hermetic compressor The invention relates to a small, efficient hermetic compressor for refrigeration wherein reduction in size and minimization of parts is emphasized. The motor compressor unit is mounted within a sealed outer housing and comprises a cast crankcase, which i... | 12/24/1985 |
| 4461595 | Wrist pin for reciprocating engines A wrist pin for coupling a connecting rod to a piston in an engine is disclosed. The pin takes the form of a metal tube having a specially designed aperture with an increased surface area in comparison with conventional wrist pins having bores with circul... | 07/24/1984 |
| 4459945 | Cam controlled reciprocating piston device A unique reciprocating piston device that uses one or more special cams and yokes to replace the functions normally provided by crankpins and connecting rods. The cams have noncircular finite jerk lift surfaces which provide continuous positive positionin... | 07/17/1984 |
| 4455976 | Internal combustion engines A four cycle internal combustion engine in which cylinders are arranged in pairs. The pistons in each pair of pistons are arranged to operate in tandem. A U shaped arm which is arranged to turn around a center is connected through one set of linkages to a... | 06/26/1984 |
| 4450754 | Mechanical arrangements for piston-crankshaft devices Engines, pumps and compressors having one or more pistons mechanically connected to a crankshaft (30; 100; 200) incorporates an eccentric disc (35, 35; 111, 112; 210) skewered by and mounted on a crankshaft crankpin (34; 101; 201-203). The eccentric disc ... | 05/29/1984 |
| 4363295 | Movable head engine An internal combustion engine utilizing either an Otto or a Diesel cycle contains two opposed pistons in each cylinder. The first piston drives a crank arm which drives a crankshaft. The crankshaft, through a timing means, drives an eccentric positive-mot... | 12/14/1982 |
| 4203406 | Expanding piston A compound expanding piston for an internal combustion engine. The piston includes a crown or head and a skirt, with the skirt depending from the crown. A sleeve is provided in telescoping arrangement with the skirt, the sleeve in one embodiment including... | 05/20/1980 |
| 4180028 | Fluid operated device A fluid operated device comprises a cylinder, a piston movable axially therein, a shaft parallel to the axis of the cylinder and coupling means coupling the piston and cylinder and/or the piston and shaft in such a way that axial reciprocation of the pist... | 12/25/1979 |
| 4085628 | Intra-articulate reciprocating engine system The invention is a reciprocating mechanism for piston driven internal and external combustion engines. The design presented consists of an intra-articulate connecting rod system operating in conjunction with a compound crankshaft. The advantage of this sy... | 04/25/1978 |
| 4057040 | Internal combustion engine system A four-cycle internal combustion engine having a transmission linkage between the engine piston and the power output enabling the power stroke of the engine piston to be substantially greater than the intake stroke. The preferred form of transmission link... | 11/08/1977 |
| 4054115 | Miniature internal combustion engine An internal combustion engine has a cylinder and a piston with rectangular cross sections. A guideway slot extends across one face of the piston, and engages an off-center pin affixed to the crankshaft for translating linear movement of the piston to rota... | 10/18/1977 |
