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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 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 |
| 7308882 | Oil feeding system of engine An oil feeding system of an engine equipped with a transmission configured to change a rotational speed of rotation of a crankshaft and to output the rotation, including an oil pump configured to be driven in cooperation with the rotation of the crankshaft, an oil p... | 12/18/2007 |
| 7240584 | Connecting rod with profiled bore for increased load capability An engine cylinder piston connecting rod subassembly, for use in an engine, includes a piston (53), a piston pin (52) and a connecting rod (51). The connecting rod has a piston end portion with a piston pin bore (62). The piston pin is in... | 07/10/2007 |
| 7082906 | Piston cooling system The piston engine cooling system includes multiple pistons rotatably coupled to a crankshaft. Each piston includes a piston head defining a cooling chamber therein, and a connecting rod coupled to the piston head. The connecting rod includes a connecting rod inlet c... | 08/01/2006 |
| 7077096 | Multi-cylinder engine In a multi-cylinder engine, a decrease of the load capacity of a main metal bearing between a bearing portion of a crankcase and a crank journal is prevented to achieve a reduction in the scale and a reduction in the weight of the engine while lubricating oil is sup... | 07/18/2006 |
| 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 |
| 6966279 | Piston cooling system for an internal combustion engine A piston cooling system for an internal combustion engine has a connecting rod assembly for connecting a piston to a crankshaft. The connecting rod assembly may have a connecting rod, a connecting rod bearing, a piston pin bushing, and a piston pin. The connecting r... | 11/22/2005 |
| 6907848 | Connecting rod with lubricant tube A connecting rod includes a connecting rod body having a crank arm bore formed in a first end and a pin bore formed in a second end. A tube is connected to the body for carrying lubricant from the first end to the second end. ... | 06/21/2005 |
| 6840156 | Piston with cast-in undercrown pins for increased heat dissipation A cast engine piston has a crown with a combustion surface and an undercrown for exposure to crankcase fluids. A plurality of pins extend from the undercrown to increase the surface area of the undercrown. The pins draw heat from the crown and dissipate the heat to ... | 01/11/2005 |
| 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 |
| 5174249 | Piston cooling device for internal combustion engine A piston cooling device for internal combustion engines is disclosed. Lubricating oil discharged from an oil pump is led through an inlet provided on an external peripheral surface of a main journal into a first oil passage and is further delivered to an ... | 12/29/1992 |
| 4672921 | Compression retaining piston A piston with a centrally located recessed area around the outer wall for containing oil on a continuous basis during engine operation. The recessed area is provided with apertures in fluid communication with passageways in the wrist pin, connecting rod, ... | 06/16/1987 |
| 4662319 | Structurally lightened piston utilizable especially in an internal combustion engine The piston for an internal combustion engine, consisting of a piston head (1) and a body (2) of monobloc or two-piece construction, the head bearing upon the body (2) via at least two circular bearing surfaces (4, 5), the body (2) having a bearing part (6... | 05/05/1987 |
| 4576126 | Two-stroke internal combustion engine A two-stroke diesel or gas fueled multi-cylinder engine utilizes a re-circulating type constant pressure feed lubrication system and is equipped with a supercharger or turbocharger combination connected in series to assist in charging the cylinders with a... | 03/18/1986 |
| 4550647 | Piston pin and piston, notably for an internal combustion engine, equipped with said pin The piston pin for a piston of an internal combustion engine is provided with a certain number of passages, each opening into the annular groove of the bearing bushing of the connecting-rod small end and into either of the annular grooves of the pin beari... | 11/05/1985 |
| 4502423 | Lubrication means for a two-cycle internal combustion engine This invention is a lubrication pumping means contained within one or more reciprocating rods to assure lubrication of the crankpin rod bearing and the wrist pin bearing during operation of a two-cycle internal combustion engine.... | 03/05/1985 |
| 4398507 | Connecting rod spray orifice for cooling of a piston Connecting rod orifices spray oil on the underside of a piston of an internal combustion engine. The orifices are constructed to produce a wide spray evenly distributed across the underside of the piston beneath the combustion chamber in the internal comb... | 08/16/1983 |
| 4364307 | Lubrication system A cylinder lubrication system for a combustion engine. The lubricant is directed to the cylinder wall through a piston moving in the cylinder. The piston comprises a piston pin above which there are a plurality of piston rings sealing a combustion chamber... | 12/21/1982 |
| 4363293 | Piston for a reciprocating piston machine, particularly an internal combustion engine A piston for a reciprocating piston machine, of the type swivelled by means of a piston pin to the associated connecting rod small and consisting of two members constituting the piston head and the piston skirt, assembled together by stud bolts. The centr... | 12/14/1982 |
| 4342291 | Expandable piston motor An internal combustion engine comprises a piston having first and second coaxial parts movable axially relative to each other in the direction of reciprocation of the piston and having a chamber therebetween which varies in volume with the relative moveme... | 08/03/1982 |
| 4270494 | Insulated oil cooled piston assembly An oil cooled diesel engine piston is designed to restrict heat loss from the combustion chamber through provision of a combustion chamber insert defining a central non-oil-cooled chamber and a surrounding annular insulating air gap. The air gap controls ... | 06/02/1981 |
| 4253430 | Insulated oil cooled piston assembly An oil cooled diesel engine piston is designed to restrict heat loss from the combustion chamber through provision of a combustion chamber insert defining a central non-oil-cooled chamber and a surrounding annular insulating air gap. The air gap controls ... | 03/03/1981 |
| 4068563 | Internal oil seal for piston A seal for use within the interior portions of a piston, primarily on a diesel engine which has a pressurized oil supply which is forced upwardly through the connecting rod and sprayed on to the upper portion of the piston. The seal substantially closes t... | 01/17/1978 |
| 4005686 | Piston-pin for liquid cooled pistons Piston-pin for liquid cooled pistons containing a longitudinal bore and end sealing elements closing said bore, said sealing elements being impressed or shrunk into position. More specifically, the sealing elements are cup shaped, having a rim and a base,... | 02/01/1977 |
| 3992980 | Internal oil seal for piston A seal for use within the interior portions of a piston, primarily on a diesel engine which has a pressurized oil supply which is forced upwardly through the connecting rod and sprayed on to the upper portion of the piston. The seal substantially closes t... | 11/23/1976 |
| 3930472 | Composite oil-cooled piston for an internal combustion engine The piston head is hollowed for a central coolant cavity and for an outer annular coolant cavity separated by a ridge by which the head is supported on the piston body. An outer shoulder also supports the skirt part of the head on the piston body. The pis... | 01/06/1976 |
