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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 8061029 | Method for manufacturing a piston device A method for manufacturing a piston device, comprises the following steps. Processing a first raw material to form a piston with a top surface and a bottom surface. Processing a second raw material to have the diameter of said second raw material slightly larger tha... | 11/22/2011 |
| 7921555 | 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... | 04/12/2011 |
| 7918022 | Method of producing a cooling channel piston for an internal combustion engine A method of producing a cooling channel piston for an internal combustion engine having a cooling channel in its piston crown, wherein a piston lower section with piston bosses, piston pin bores and piston skirts attach to the piston crown, wherein a piston blank is... | 04/05/2011 |
| 7818880 | Ram for powered hammer A method of manufacturing a ram configured to be mounted for reciprocation in a guide tube section of a powered hammer. The ram includes an outer circumferential surface, a radially outwardly projecting sealing portion, and a helically shaped vent channel defined in... | 10/26/2010 |
| 7761987 | Manufacturing process for cooling channel piston with formable shoulder Process for manufacturing a cooling channel piston which has a cooling channel approximately in the area behind the ring belt, where a piston blank is shaped at least partially by forging, where in accordance with the invention it is envisaged that a circumferential... | 07/27/2010 |
| 7421782 | Method for manufacturing internal combustion engine piston A method is provided for efficiently manufacturing a high quality internal combustion engine piston having an annular cavity allowing for good circulation of cooling fluid. An annular groove is formed at the circumferential edge of the top face of a piston crown, or... | 09/09/2008 |
| 7404347 | Noncircular working device A working device of a noncircular workpiece, such as a piston of an internal combustion engine, is improved. A workpiece 10 is held by a work spindle and rotated. A noncircular working device 100 has a noncircular working unit base 110 and is pr... | 07/29/2008 |
| 7337539 | Method for production of a coolable annular support for internally cooled piston rings A method of producing a coolable annular support for internally cooled piston rings and comprising an annular body, a cooling channel plate and respective tubular bodies or plate-shaped bodies disposed on or in openings of the plate. End portions of legs of the cool... | 03/04/2008 |
| 7332199 | Thermal spraying of a piston ring The invention relates to a piston ring coated with a coating material by a thermal spray process, exposed to heat treatment of the coating material at an elevated temperature and for a time effective to at least partially diffuse the coating material into the piston... | 02/19/2008 |
| 7310876 | Method for making a piston body A method for producing a one-part piston body for a piston-cylinder arrangement, in particular a shock absorber piston, is disclosed. The method may include in a first step, pressing a green compact comprising a revolving web and longitudinal support webs from a sin... | 12/25/2007 |
| 7213337 | Method of manufacturing pistons and components thereof, and forging tools A method of manufacturing an entire piston, piston heads for example, especially intended for internal-combustion engines, wherein in an initial manufacturing step a blank that will eventually constitute the piston is preliminarily forged along a prescribed axis, sh... | 05/08/2007 |
| 7204117 | Method and device for producing a hard metal tool The method has a first material of lesser hardness acting as a rod-shaped carrier for a second material of greater hardness, each materials formed within a respective extrusion press tool and the plastic mass flow of the greater hardness material fed to the extrusio... | 04/17/2007 |
| 7197976 | Composite piston Devices, piston components, and methods are provided for an improved piston. One embodiment for a piston component includes a base having a side to receive a piston body. A tang is provided to the base and extends outward from the side of the base which is to receiv... | 04/03/2007 |
| 7185572 | Method for rounding off the edge of a recess on a piston The aim of the invention is to produce a rounding off on a diesel piston comprising a combustion recess and valve recesses that lie at a slant in relation to the piston floor. The rounding off should not significantly increase particle emissions. To this end, the ed... | 03/06/2007 |
| 7127813 | Method for the production of pistons having depression edge armoring, for internal combustion engines A method for the production of pistons having depression edge armoring for internal combustion engines, in which a more heat-resistant armoring ring, in comparison with a forged piston blank having a combustion depression, is connected with the piston blank in the r... | 10/31/2006 |
| 7104183 | One-piece steel piston A one-piece steel piston that is made from a piston blank that includes a portion that configured and designed to be displaced to form a cooling gallery and ring belt. The piston blank can be formed by a casting or forging process. The portion that is designed and c... | 09/12/2006 |
| 7093529 | Composite piston Devices, piston components, and methods are provided for an improved piston. One embodiment for a piston component includes a base having a side to receive a piston body. A tang is provided to the base and extends outward from the side of the base which is to receiv... | 08/22/2006 |
| 7086152 | Engine piston and manufacture thereof A method of forming a low-friction, helically ridged skirt surface of an engine piston comprises cutting a continuous groove in a piston body rotating about axis so that adjacent groove turns intersect as ridges and carry lubricating oil which forms a film on the ri... | 08/08/2006 |
| 7069897 | Forged piston for internal combustion engine and manufacturing method thereof A forged piston for an internal combustion engine formed from an aluminum alloy containing silicon in an amount of 6 to 25 mass %, includes an oil ring groove section (12) and a skirt section (13). The ratio (A/B) of the average size (A) of eutectic si... | 07/04/2006 |
| 7005620 | Piston and method of manufacture A piston particularly adapted for heavy-duty diesel engine applications is fabricated from separate parts having circumferentially extending joining surfaces that are heated prior to bonding to an elevated temperature sufficient to enable bonding of the joining surf... | 02/28/2006 |
| 7001670 | Wear protection layer for piston rings, containing wolfram carbide and chromium carbide The invention relates to a wear protection layer for piston rings in internal combustion engines consisting essentially of chromium carbides, wolfram carbide, chromium and nickel. The wear protection layer is formed from a mixture of powders in which the first powde... | 02/21/2006 |
| 7000526 | Hydraulic piston made from rolled sheet metal, method for its manufacture and intermediate product of the method The invention relates to a cup-shaped hydraulic piston (10) made from rolled sheet metal, which comprises an open end (12), a side wall (16) with a cylindrical outer surface (18) and an inner surface (22), as well as a piston head ... | 02/21/2006 |
| 6988314 | Assembly, tolerance matching and post-manufacturing quality assurance method A system and method for assembling an internal combustion engine and for correlating engine information with a vehicle identification number. The engine includes an engine block and a plurality of pistons. The engine block has a plurality of cylinders formed therein... | 01/24/2006 |
| 6973723 | Piston formed by powder metallurgical methods A piston includes a piston structure being unitarily formed in a powder metallurgy process, the piston structure having a crown assembly and a skirt assembly, at least a partial combustion chamber being formed intersecting a piston crown surface during the powder me... | 12/13/2005 |
| 6938603 | Method for the production of a one-piece piston for an internal combustion engine A method for the production of a one piece piston for an internal combustion engine. The piston has a ring shaped cooling channel arranged in an outer region of a piston head. The channel is partially closed off by a circumferential projection structured as an oil g... | 09/06/2005 |
| 6935221 | Method for manufacturing an aluminum die cast piston for reciprocating compressors A die cast aluminum piston for a reciprocating compressor. The piston is cast with no coring and thus includes no aperture in the as-cast piston for a wrist pin. The aperture for the wrist pin is subsequently formed in the wrist pin in a preselected location after c... | 08/30/2005 |
| 6920860 | Cooling channel cover for a one-piece piston of an internal combustion engine A cooling channel cover for a one-piece piston of an internal combustion engine, the piston having a closed cooling channel that runs around inside the piston crown, at the level of the piston ring band, and a ring-shaped recess provided between the piston ring band... | 07/26/2005 |
| 6889596 | Compressor cooler and its assembly procedure A cryogenic refrigerator and more particularly, the cryogenic refrigerator compressor assembly procedure and to a mechanism for supporting piston for use in such a cryogenic refrigerator is described. Embodiments of the present invention solve the above-mentioned dr... | 05/10/2005 |
| 6789313 | Piston pin lock ring insertion tool and method A piston-pin lock-ring-insertion tool has a ring-insertion tube (1) in ring-insertion relationship to a ring pusher (2). The ring-insertion tube has an inside periphery with a press-close taper (8) that is tapered inwardly from a ring-feeder end... | 09/14/2004 |
| 6763757 | Process for manufacturing a one-piece cooling-channel piston The invention relates to a process for manufacturing a single-piece cooling channel piston, where a piston blank produced by forging is furnished with a circumferential ring-shaped recess between the piston skirts and the piston crown and with an open-bottomed cooli... | 07/20/2004 |
| 6760961 | Piston machining An apparatus and method of utilization thereof is provided for machining pistons of reciprocating piston internal combustion engines. The piston is held in a work station by its interior cavity and the oil rings, oval side surface and hinge pin bore are machined on ... | 07/13/2004 |
| 6703577 | Method of making closed cavity pistons A method of securing a cap on a piston body includes forming a first annular V-shaped surface at an open end of a cylindrical piston body; forming a second annular V-shaped surface on an annular surface of an oil conduit in the interior center of the pist... | 03/09/2004 |
| 6681485 | Method for casting a piston for a reciprocating internal combustion engine A process for producing pistons for a reciprocating internal combustion engine by casting, the process including the steps of determining for at least a first piston of a casting process batch, a volume Vactual formed by a surface of the piston... | 01/27/2004 |
| 6546993 | Method for producing a box piston The invention relates to a casting method for producing a box piston which comprises recesses between the hub support and the ring band. The invention aims to further reduce the weight of the piston. The casting cores which produce the recesses can theref... | 04/15/2003 |
| 6530149 | Method for producing hollow piston for compressor by forging A method of producing a hollow piston for a compressor, the piston including a head portion which is slidably fitted in a cylinder bore of the compressor, and an engaging portion which engages a reciprocating drive device of the compressor for reciprocati... | 03/11/2003 |
| 6508162 | Dual alloy piston and method of manufacture A dual alloy metallic piston is made by casting a first alloy into a mold to form a corresponding first portion. Before the first alloy solidifies, a second alloy is cast into the mold to form a corresponding second portion of the piston. The first and se... | 01/21/2003 |
| 6499387 | Unified multi-piece piston and method of manufacture A method of manufacturing a piston for heavy-duty diesel engine applications comprises forming a piston body having a pair of pin bosses, and bonding separately formed skirt portions to the pin bosses. The resultant piston has the separately formed skirt ... | 12/31/2002 |
| 6488454 | Method for machining shoe pocket for piston in variable displacement swash plate type compressor A method for machining a pair of shoe pockets for piston in a swash plate type compressor is disclosed. In this method, the shoe pockets are respectively formed on the opposed walls of the slot in the piston of the compressor while conforming to a single ... | 12/03/2002 |
| 6487773 | Method of making one-piece piston The invention concerns a method of producing a one-part piston which, in the region of the piston ring zone, has a closed cooling duct and a recess between the piston ring zone and the box-shaped piston body. The method comprises the following steps: A pi... | 12/03/2002 |
| 6474220 | Cooling channel piston with especially low overall height The invention relates to a process for producing a cooling channel piston, in which the overall height is reduced in that the annular recess has a lower height than the height of the tool used for producing the cooling channel, and the production of the c... | 11/05/2002 |
