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 |
| 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 |
| 6925904 | Adjustable pedal mechanism with tapered rivet for automatic gap and wear protection A control pedal assembly includes a first support and a second support adjustable in a fore-aft direction relative to the first support. At least one guide is carried by the second support and has a tapered engagement surface engaging the first support and moving al... | 08/09/2005 |
| 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 |
| 6048126 | Mushroom-type pin retainer A mushroom-type pin retainer for a pin having a central bore and which connects a piston and a piston rod of an internal combustion engine. The pin retainer is comprised of a mushroom head connected to a shaft. The shaft has a section of larger diameter f... | 04/11/2000 |
| 6038943 | Piston pin, and method of making a piston pin A piston pin for connecting a piston to a connecting rod especially but not exclusively of an internal combustion engine is made from a sleeve formed by a non-cutting rolling procedure at formation of a longitudinal slot. The longitudinal slot of the slee... | 03/21/2000 |
| 5890417 | Piston for a reciprocating compressor A piston/cylinder assembly for a reciprocating compressor has a piston comprising telescopingly connected first and second piston members. The first piston member is connected to a connecting rod. The second piston member is provided with a piston head an... | 04/06/1999 |
| 5839352 | Articulated piston An articulated piston for use in heavy duty diesel engines including a piston crown having an outer surface, a peripheral pending side wall and an inner surface having a pair of pin bosses extending downwardly from the inner surface with the inner surface... | 11/24/1998 |
| 5707219 | Diaphragm pump A diaphragm pump is provided having a plurality of piston inlets connecting a hydraulic fluid source with the piston chamber and a plurality of check valves each having a ball and valve seat disposed within the inlets. The valve seat includes a conical se... | 01/13/1998 |
| 5701802 | Multipart piston for an internal combustion engine An engine piston includes a piston head; a first bearing block forming a one-piece component with the piston head and having a first bearing face; a piston skirt being a component separate from the piston head; a second bearing block forming a one-piece c... | 12/30/1997 |
| 5692430 | Articulated piston apparatus including a cooling gallery An articulated piston apparatus including an improved skirt member wherein the skirt member includes a cooling gallery channel with means for providing a directed flow of lubricant from the cooling gallery channel to the elements of the piston apparatus d... | 12/02/1997 |
| 5483869 | Sealed articulated piston The design and construction of past articulated pistons include an open space between a head portion and an independent skirt portion. The open space allows excess cooling fluid, such as oil, to exit the piston and flow toward the cylinder, increasing oil... | 01/16/1996 |
| 5359922 | Head of two welded parts for two-piece articulated piston A method to manufacture an articulated piston head wherein the two portions composing the head, i.e. the top portion and the pin boss portion, are formed separately from blanks of forged or cast chromium-molybdenum steel or a low alloy steel, subjected to... | 11/01/1994 |
| 5307732 | Piston assembly having a wrist pin bolted therein The design and construction of past piston assemblies having a wrist pin bolted to a connecting rod have excessive weight and structural components, and requires more complex machining techniques and tooling. The present invention overcomes these problem ... | 05/03/1994 |
| 5289758 | Pin plugs for use in a piston assembly The design and construction of past piston assemblies having a wrist pin retained by a pair of snap rings positioned in a groove. Other past piston assemblies have a stubpin or cap positioned within a bore of a piston member or the wrist pin. In these app... | 03/01/1994 |
| 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 |
| 5144884 | Two-part piston assembly device A piston assembly for use in a piston cylinder of an engine is disclosed. The piston assembly includes a piston rod which connects the piston assembly to a crankshaft. The piston rod has a pin receiving opening at an upper end. A piston head having a tran... | 09/08/1992 |
| 5115726 | Two-piece piston assembly A two-piece, or articulated, piston assembly for internal combustion engines, comprising a head composed of a top portion and a pair of pin bosses integral with it, a skirt portion, and a wrist pin mounted in the pin boss holes. The pin bosses are secured... | 05/26/1992 |
| 5063831 | Piston pin bearing A crosshead piston bearing assembly is disclosed. The piston bearing comprises a part-cylindrical upper bearing segment, or slipper, and a pair of spaced part-cylindrical lower bearing segments, or ears, engageable with the upper segment to form a pair of... | 11/12/1991 |
| 5052280 | Coolable trunk piston for internal combustion engines In a two-piece piston with a head piece and a trunk hinged only over the piston pin, the annular space radially located inside the piston ring groove and open in the direction of the trunk is covered with a sheet metal wall part forming a cooling duct. Th... | 10/01/1991 |
| 5040454 | Piston assembly and piston member thereof having a predetermined compression height to diameter ratio Present day diesel engines having aluminum piston assemblies are limited to combustion chamber pressures of approximately 12,410 kPa (1,800 psi) whereas the desire is to increase such pressures up to the 15,170 kPa (2,200 psi) range. To reach such levels ... | 08/20/1991 |
| 4989559 | Pistons for internal combustion engines Pistons are described comprising a crown having an associated piston ring groove belt and which crown is supported by gudgeon pin bosses connected thereto by two generally axially extending planar webs which are orientated transversely to the gudgeon pin ... | 02/05/1991 |
| 4961408 | Pistons for reciprocating machines A piston has a head portion and a skirt formation, a gudgeon pin by which the piston may be pivotally connected to a connecting rod is supported transversely of the skirt formation, the skirt formation is defined by a pair of part cylindrical skirt portio... | 10/09/1990 |
| 4909132 | Curved supporting elements for joining piston pin bosses to piston head of internal combustion engine piston In order to achieve less deformation under gas pressure load and also under thermal load, the bottom piece of a piston with ring-carrying barrel is configured as a supporting cone tapering towards the piston pin and connected with the piston pin bosses by... | 03/20/1990 |
| 4843952 | Low-height articulated piston with skirt-overhanging guide portions on head A two-part, low compression height, open-ended hollow skirt-type piston for internal combustion engines has a piston pin creating an articulated connection of the separate skirt and head parts. Guide portions (5) protruding axially in the direction of the... | 07/04/1989 |
| 4811654 | Internal combustion engine piston with laterally offset crudgeon-pin bore in piston head and body portions Piston for combustion engines consisting of an upper part forming the piston crown and a lower part forming the piston body. These two piston parts abut via annular contact surfaces in the piston axial direction and are coupled together via a gudgeon pin ... | 03/14/1989 |
| 4805518 | Piston A crosshead piston 10 comprises a head member 18 and a skirt member 20, each of which can be secured independently to a piston pin 14. The skirt 20 has a reduced diameter upper end portion 66 which fits within lower end 24 of the head member ring belt por... | 02/21/1989 |
| 4719846 | Method and circumferential slider apparatus for balancing lateral force between piston and cylinder wall A pair of circumferential sliders are positioned symmetrically on opposite sides of a piston, an inner surface of each circumferential slider being connected to a respective bevel rack gear. The rack gears are driven by bevel pinion gears that are attache... | 01/19/1988 |
| 4644853 | Piston and bearing assemblies In a preferred embodiment, a crosshead piston assembly for four-stroke cycle engines includes a novel piston pin bearing assembly having opposed less than semicylindrical insert bearings retained by engagement of arcuately opposite coplanar edge surfaces ... | 02/24/1987 |
| 4433616 | Piston assembly for an internal combustion engine A piston assembly for an internal combustion engine having a rotatable crankshaft. The piston assembly includes a piston body having a concave configured cavity formed in one end and a plurality of recesses formed in its outer circumference. The piston bo... | 02/28/1984 |
| 4358881 | Method for manufacturing a piston with a separate skirt A method for manufacturing a piston for internal combustion engines, compressors and the like, comprising a head portion articulately connected to a separate skirt portion, wherein the skirt portion comprises a steel tubular part obtained by cutting, bend... | 11/16/1982 |
| 4256022 | Piston for reciprocating internal combustion engines, typically diesel engines A piston for reciprocating internal combustion engines, especially Diesel engines, is provided having a crown exposed to the heat of combustion gases, a guide member spaced from said crown, a shell connecting said crown and guide member, a ring carrier co... | 03/17/1981 |
| 4207808 | Piston for reciprocating internal combustion engines, typically diesel engines An improved piston structure for Diesel and like reciprocating piston engines is provided having a top and foot, a sealing section on said piston connecting said top and foot, a guide section articulatedly connected to said sealing section through trunnio... | 06/17/1980 |
| 4207779 | Connecting rod for axial cylinder-type reciprocating piston engine A connecting rod for reciprocating piston engines, especially axial cylinder-type reciprocating piston engines, with the connecting rod including a tubular shaft having hollow spherical shells mounted at the ends thereof. The tubular shaft and the hollow ... | 06/17/1980 |
| 4073220 | Piston assembly An improved piston assembly for high-power internal combustion engines such as supercharged diesel engines. The piston includes separate head and skirt portions. An elongated bearing member having an external journal surface is formed across the bottom of... | 02/14/1978 |
| 4013057 | Piston assembly An improved piston assembly for high-power internal combustion engines such as supercharged diesel engines. The piston includes separate head and skirt portions. An elongated tubular-shaped bearing member having an internal bearing surface and an external... | 03/22/1977 |
| 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 |
| 3995538 | Crosshead piston assembly An internal combustion engine crosshead piston assembly having an outer skirt elastomerically mounted on an inner skirt to reduce piston-slap-caused noise.... | 12/07/1976 |
| 3983793 | Crosshead piston assembly An internal combustion engine crosshead piston assembly having an outer skirt mounted by an elastomeric member on an inner skirt to reduce piston-slap-caused noise wherein expansible chambers are provided in the elastomeric member and are connected by ori... | 10/05/1976 |
