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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 |
| 8181622 | Engine and piston There is provided an engine in which sliding surfaces of a cylinder and a piston do not tend to seize and the ratio of a lubricating oil to a composite fuel can be reduced. There is also provided a piston that allows the lubricating oil to be intentionally supplied ... | 05/22/2012 |
| 8181623 | Piston for an internal combustion engine A piston for an internal combustion engine has at least two hub bores for holding a piston pin. The hub bores are formed with a cylindrical inner contour and are provided with a coating comprising a resin with solid lubricant particles embedded therein. The coating ... | 05/22/2012 |
| 8161934 | Multi-part piston for an internal combustion engine and method for its production A multi-part piston for an internal combustion engine has an upper piston part with a piston crown, and a lower piston part with pin boss supports and pin bosses connected with the pin boss supports. The upper piston part and the lower piston part each have an inner... | 04/24/2012 |
| 8161935 | Multi-part piston for an internal combustion engine and method for its production A method for producing a multi-part piston for an internal combustion engine and the piston itself, which has an upper piston part and a lower piston part, each having an inner and an outer support element, which elements delimit an outer circumferential cooling cha... | 04/24/2012 |
| 8156915 | Piston having ceramic head A piston for an internal combustion engine wherein the piston includes a piston body fabricated from a metal and a piston head fabricated from a ceramic or ceramic composite material, the ceramic or ceramic composite piston head is press fit to the piston body and s... | 04/17/2012 |
| 8146560 | Multi-part piston for an internal combustion engine and method for its production The present invention relates to a multi-part piston (10, 110) for an internal combustion engine, having an upper piston part (11, 111) having a piston crown (13), and a lower piston part (12), whereby the lower piston part (12) ha... | 04/03/2012 |
| 8127738 | Multi-part piston for an internal combustion engine A multi-part piston for an internal combustion engine has an upper piston part with a piston crown, and a lower piston part, each of the piston parts having an inner and an outer support element that delimit an outer circumferential cooling channel and an inner cool... | 03/06/2012 |
| 8104447 | Method for the production of a piston for internal combustion engines and piston for an internal combustion engine A method for producing a piston for internal combustion engines includes the following steps: a first part is pre-fabricated by hot forging and a recess which has an undercut is formed in the first part during pre-fabrication by forming on the first part a projectio... | 01/31/2012 |
| 8087395 | Multi-part piston for an internal combustion engine A multi-part piston for an internal combustion engine has an upper piston part and a lower piston part. The upper piston part and the lower piston part each have an inner and an outer support element, which elements delimit an outer circumferential cooling channel a... | 01/03/2012 |
| 8082899 | Double-layer lubrication coating composition, double-layer lubrication coating and piston having same coating A double-layer lubrication coating composition is made up of an upper-layer coating composition and a lower-layer coating composition. The upper-layer coating composition is made up of 50 to 70 wt % of an epoxy resin or a polyamide-imide resin, 5 to 20 wt % of boron... | 12/27/2011 |
| 8079341 | Piston for an internal combustion engine A piston for an internal combustion engine is disclosed. The piston body has two pin bores for receiving a piston pin. At least one rib is disposed on the second side and extends outwardly therefrom. The at least one rib is aligned laterally between the two pin bore... | 12/20/2011 |
| 8074617 | Piston for an internal combustion engine and method for its production A piston for an internal combustion engine, has a lower piston part and an upper piston part disposed on the lower piston part. The upper piston part has a top land that runs around its circumference, and a ring belt that runs around its circumference. At least the ... | 12/13/2011 |
| 8042512 | Piston for an internal combustion engine and method for its production Proposed is a piston (1) for an internal combustion engine having a closed annular duct (4) which is arranged close to the piston head (5) and radially at the outside, which annular duct (4) has, at the piston head side, an annular openin... | 10/25/2011 |
| 8020530 | Piston and internal combustion engine therewith and method of constructing the piston A piston and internal combustion engine therewith constructed in accordance with the present invention has a piston body with an upper crown having a substantially cylindrical outer surface depending from a top surface along a central axis. At least one annular ring... | 09/20/2011 |
| 8020529 | Piston pin with slide layer for connecting rod eye for internal combustion engines Piston pin for a connecting rod in a reciprocating internal combustion engine, wherein the piston pin carries at least in the area of the running surface a thermal sprayed slide layer of a metallic bearing material or slide bearing material, as well as reciprocating... | 09/20/2011 |
| 8001947 | Piston for internal-combustion engines Disclosed is a piston for internal-combustion engines, which includes a low thermal-conductive member disposed at the top portion thereof, the low thermal-conductive member including an alloy containing Fe and Mn. The low thermal-conductive member includes a sintere... | 08/23/2011 |
| 8001946 | Piston for an internal combustion engine and method for its production A piston for an internal combustion engine has annular cooling passage arranged in the vicinity of the piston crown and radially on the outside, which, in those regions of the pin bosses which lie close to the boss holes, has boss cooling passages which are connecte... | 08/23/2011 |
| 7997249 | Piston for internal combustion engine and internal combustion engine with the same A piston for an internal combustion engine including: a piston head located at an uppermost section of the piston; a land located on a circumference of the piston head; a skirt located below the land; and a pair of pin bosses located on the lower section of the pist... | 08/16/2011 |
| 7987831 | Method for the production of a single part piston and a piston produced by such a method The present invention relates to a method for producing a single part piston (20) for an internal combustion engine from a piston blank (10), with a cooling channel (15) that is open in the downward direction running circularly inside a piston h... | 08/02/2011 |
| 7971566 | Piston for an internal combustion engine and method for its production The present invention relates to a piston (10) for an internal combustion engine, having a combustion depression (13) which is provided in the piston head (11) and has an encircling undercut (14), wherein the encircling depression edge ( | 07/05/2011 |
| 7946268 | Two-part piston for an internal combustion engine A two-piece piston for an internal combustion engine has an upper piece and a lower piece, the lower piece having an upper base part with an opening lying coaxial to the piston axis into which a pin on the upper piece is inserted. The upper piece is connected to the... | 05/24/2011 |
| 7938093 | Two piece cast ferrous crown piston for internal combustion engine This invention relates to an articulated two piece piston designed for reciprocable movement within a combustion chamber of an internal combustion engine. The piston has a crown of high-strength ferrous material that is precision cast net to finished dimensions on a... | 05/10/2011 |
| 7934482 | Liquid-cooled composite piston The invention proposes a liquid-cooled assembled piston (1) having an upper part (2) and a lower part (3), wherein the upper part (2) and the lower part (3) are connected to one another by means of a radially outer annular support ... | 05/03/2011 |
| 7866295 | Piston skirt oil retention for an internal combustion engine An internal combustion engine is provided having a cylinder case with at least one cylinder bore wall defining at least one cylinder bore. At least one piston is reciprocally movable within the at least one cylinder bore. The at least one piston includes at least on... | 01/11/2011 |
| 7802553 | Method to improve combustion stability in a controlled auto-ignition combustion engine A method to control combustion in an HCCI engine, to mitigate effects of combustion chamber deposits is detailed. The method comprises applying a specific surface coating to a combustion chamber surface. The surface coating has thermal properties substantially simil... | 09/28/2010 |
| 7798116 | Piston/connecting rod assembly for an internal combustion engine A piston/connecting rod arrangement for an internal combustion engine has a piston upper part with hub supports which lie opposite one another and have hubs and hub holes which delimit a recess, in which the small connecting-rod eye of a connecting rod is arranged. ... | 09/21/2010 |
| 7762227 | Coolable piston for internal combustion engine A coolable piston for internal combustion engines is disclosed herein. The coolable piston includes a head portion with a crown and an annular wall. First and second shoulders are defined in annular wall adjacent to one another. A collar is formed on a distal end of... | 07/27/2010 |
| 7748361 | Piston for a combustion engine, and combustion engine Disclosed is a piston for a combustion engine, comprising a cooling duct with a single inlet port and at least two outlet ports, at least two of which are separated from each other regarding the discharged coolant. Also disclosed is a combustion engine comprising at... | 07/06/2010 |
| 7743745 | Multipart, cooled piston for a combustion engine Disclosed is a multipart, cooled piston for a combustion engine, comprising, in a radially outward direction, an annular cooling duct located on the bottom side that faces away from the piston head. The cooling duct is closed by a cooling duct cover which is embodie... | 06/29/2010 |
| 7730866 | Sealing device This device is designed for a piston which is designed to move in alternating linear movement parallel to the axis of a chamber divided by the piston into a high pressure volume and a low pressure volume, and is of the type comprising: ... | 06/08/2010 |
| 7717079 | Engine An engine includes: a cylinder block; and a piston ring, in which the cylinder block has a cylinder liner portion formed of an aluminum-based composite reinforced by a ceramic containing at least either of a silicon carbide and an alumina, and in which the piston ri... | 05/18/2010 |
| 7654240 | Engine piston having an insulating air gap A piston for an internal combustion engine has an upper crown with a top and a bottom surface, and a lower crown with a top and a bottom surface. The upper crown and the lower crown are fixedly attached to each other using welds, with the bottom surface of the upper... | 02/02/2010 |
| 7637241 | Pressure reactive piston for reciprocating internal combustion engine A pressure reactive piston for an internal combustion engine includes an axially directed central bore formed within a piston ring portion of the piston, which houses a slidably mounted crown which cooperates with the central bore to define a gas chamber which is cl... | 12/29/2009 |
| 7628135 | Multi-part piston for an internal combustion engine A multipart piston for an internal combustion engine has a top piston part and a bottom piston part. The top piston part is provided with an externally threaded head at the end facing the bottom piston part while the bottom piston part is equipped with a support pla... | 12/08/2009 |
| 7628134 | Piston for an internal combustion engine The invention relates to a piston for an internal combustion engine comprising an annular cooling channel embodied in the edge area of the piston head and closed on a rod side with a cover consisting of two semicircular half-shells which are oriented with the intern... | 12/08/2009 |
| 7603977 | Cooling duct piston for an internal combustion engine comprising heat pipes The invention relates to a cooling duct piston for an internal combustion engine comprising heat pipes. In order to improve dissipation of heat from the thermally loaded piston areas while preventing thermal tensions, liquid-filled heat pipes that are provided with ... | 10/20/2009 |
| 7559306 | Double-layer lubrication coating composition, double-layer lubrication coating and piston having same coating A double-layer lubrication coating composition is made up of an upper-layer coating composition and a lower-layer coating composition. The upper-layer coating composition is made up of 50 to 70 wt % of an epoxy resin or a polyamide-imide resin, 5 to 20 wt % of boron... | 07/14/2009 |
| 7543557 | Scuff resistant aluminum piston and aluminum cylinder bore combination and method of making A piston and cylinder assembly for an engine is disclosed. The assembly includes a piston including an aluminum alloy piston body having a crown and a skirt extending from the crown. The skirt has an exterior surface having a surface finish in a wave form with peaks... | 06/09/2009 |
| 7533649 | Piston for an internal combustion engine A piston for an internal combustion engine, comprising a piston head having a piston crown, a circumferential top land, and a circumferential ring belt having ring grooves. At least one ring groove is provided with a ring insert. A circumferential depression is prov... | 05/19/2009 |
| 7503304 | Internal engine piston and its production method An integrally cast steel piston for internal engines, the cast steel having (a) a composition comprising 0.8% or less of C, 3% or less of Si, 3% or less of Mn,0.2% or less of S, 3% or less of Ni, 6% or less of Cr, 6% or less of Cu, and 0.01-3% of Nb, the balance bei... | 03/17/2009 |
