Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8079299 | Upper part of a composite piston An upper part (1) of an assembled piston is disclosed, comprising a radially directed inner contact surface (2) arranged on the underside of an annular rib (15) and a radially directed outer contact surface (3) arranged on the underside o... | 12/20/2011 |
| 7325525 | Piston for internal combustion engine A piston includes: in a cross-section that is perpendicular to a piston pin and that includes a center axis of the piston, a great thickness-reduction portion provided to attain a thin thickness as stress applied to the piston on a side without a cavity is small, an... | 02/05/2008 |
| 7310965 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 12/25/2007 |
| 7302884 | Piston A number of embodiments of a piston may have a shape that provides enhanced piston guidance. In such embodiments, the piston shape may include an axial profile that is configured to provide certain thrust load characteristics. ... | 12/04/2007 |
| 7159412 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 01/09/2007 |
| 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 |
| 7073703 | Aluminum/ceramic bonding substrate and method for producing same An aluminum plate 12 having a purity of 99.5% or more, preferably 99.9% or more, is caused to contact at least one side of a ceramic substrate 10 of aluminum nitride or alumina to be heated at a temperature of 620 to 650° C. in an inert gas to bond th... | 07/11/2006 |
| 7073346 | Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 07/11/2006 |
| 7066078 | Piston for internal combustion engine By casting a preformed member composed of a fiber reinforced material into a base material of a piston, a pair of crown reinforcing portions corresponding to respective pin boss portions are formed on a crown portion, and the pair of crown reinforcing portions are c... | 06/27/2006 |
| 7032314 | Methods of making tungsten carbide-based annular jewelry rings Wear resistant jewelry apparatus and methods of making the same wherein articles of jewelry are made from sinterable metal and/or ceramic powder materials compressed into a predetermined configuration and then sintered to form a blank from which a jewelry item may b... | 04/25/2006 |
| 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 |
| 6993842 | Methods and jewelry articles comprising sintered tungsten carbide System, apparatus, and method for making composite articles including jewelry rings. Jewelry items such as finger rings, bracelets, earrings, body jewelry, and the like, are examples of such articles. Medical, dental, and industrial devices or components are other e... | 02/07/2006 |
| 6928734 | Jewelry ring and method of manufacturing same Methods are provided of making annular, tungsten-carbide jewelry articles including finger rings, bracelets, earrings, body jewelry, and the like. Advantageously, the methods include providing a tungsten-carbide based annular jewelry article having a desired surface... | 08/16/2005 |
| 6899017 | Wheel cylinder for actuating a vehicle brake and a method of manufacturing same A wheel cylinder for engaging a brake shoe according to which at least one piston is disposed in the bore of a body member and is adapted to move outwardly in response to a predetermined fluid pressure in the bore into engagement with a brake shoe. ... | 05/31/2005 |
| 6883418 | Carbon piston for an internal combustion engine A carbon piston whose piston crown underside forms in the region between the increased-thickness boss portions independently of the surface configuration of the top side of the piston crown a curved surface, preferably an ellipsoidal surface, which adjoins the incre... | 04/26/2005 |
| 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 |
| 6739239 | Caston piston The invention relates to a molded piston, in particular an injection-molded piston (1) of fiber-reinforced plastic, which is seated slidably in a receiving bore (2) of a housing (4) and is embodied as a cup-shaped body with a piston bottom (6... | 05/25/2004 |
| 6595341 | Aluminum-coated plastic member A composite part of a clutch for use in a motor vehicle has a plastic carrier and a film of oxidized aluminum or an aluminum alloy overlying and adhering to that part of the carrier which is in sliding contact with at least one other part of the clutch. O... | 07/22/2003 |
| 6554588 | Composite piston for a vibration pump A composite piston (30) for a vibration pump comprises a core (32), activating a piston, and a piston (34) made of plastic and obtained by means of molding on an insert formed by the core (32). The composite piston (30) thus obtained achieves objects of h... | 04/29/2003 |
| 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 |
| 6443048 | Piston for a cylinder and a method for its manufacture The invention relates to a piston for a cylinder, in particular a brake piston for a brake cylinder, made of a plastic. Such a piston is improved so that the piston is not damaged by wear, and furthermore can be manufactured inexpensively within the presc... | 09/03/2002 |
| 6223701 | Cooled one piece piston and method A cooled one piece piston for use in an internal combustion engine has a piston body with piston cooling gallery disposed annularly in the piston body and a flange portion extending radially from a supporting portion of the piston body. A piston ring belt... | 05/01/2001 |
| 6032570 | Composite piston for machine A composite piston and method for forming such a piston for a reciprocating machine such as an internal combustion engine. A blank is formed from a pair of dissimilar alloys, one of which has substantially greater properties such as strength or abrasion r... | 03/07/2000 |
| 5996471 | Aluminum alloy for internal-combustion piston, and aluminum alloy piston An aluminum alloy for internal-combustion engine pistons has good high-temperature strength and good abrasion resistance. It comprises from 2 to 5% by weight of copper, from 13 to 16% by weight of silicon, from 0.2 to 1.3% by weight of magnesium, from 1.0... | 12/07/1999 |
| 5934174 | Lightweight articulated piston head and method of making the piston head A piston head is provided which is lightweight and inexpensive yet capable of handling high mechanical and thermal loading during operation. The piston head generally includes a top head portion and a bottom head portion formed separately and connected by... | 08/10/1999 |
| 5901772 | Method for casting pistons A ring carrier, for use in a piston casting die, is an annular-shaped member having a channel on an outer surface area. The piston casting die includes projections for engaging the channel and supporting the ring carrier within the piston casting die. At ... | 05/11/1999 |
| 5884550 | Integral ring carbon-carbon piston An improved structure for a reciprocating internal combustion engine or compressor piston fabricated from carbon-carbon composite materials is disclosed. An integral ring carbon-carbon composite piston, disclosed herein, reduces the need for piston rings ... | 03/23/1999 |
| 5850777 | Floating wrist pin coupling for a piston assembly The floating wrist pin coupling for a piston assembly will rotate within a bearing assembly for an oscillating connecting rod as a piston cycles through compression and suction strokes. As the wrist pin rotates through 360 degrees, the bearings within the... | 12/22/1998 |
| 5740788 | Fiber reinforced ceramic matrix composite piston and cylinder/sleeve for an internal combustion engine This invention discloses a "ceramic" piston and cylinder/sleeve pair for an internal combustion engine. The pair has low coefficients of thermal expansion for closer parts tolerances without danger of seizing and/or breakage/cracking from dissimilar part ... | 04/21/1998 |
| 5653021 | Production process of a piston To improve the abrasion resistance by increasing the ratio of copper content in the copper-type alloy layer on the periphery of the ring groove of a piston. A peripheral groove having a section of a roughly large trapezoidal shape larger than that of the ... | 08/05/1997 |
| 5601010 | Piston unit of an internal combustion engine Piston unit used in an internal combustion engine, which allows no interfacial crack between a piston and a wear-proof ring as well as allowing to provide T6 treatment to aluminum base alloy used for the piston. The piston unit has a piston formed of alum... | 02/11/1997 |
| 5505171 | Reinforced insert for a metal piston A piston for an internal combustion engine, and particularly, but not exclusively, for a Diesel engine, has in a region thereof reinforcing ceramic fibres, the fibres originally being in the form of an insert for the piston with a relatively high density ... | 04/09/1996 |
| 5499572 | Bi-tech piston A piston for developing compression within the cylinder of a combustion engine or other type compression generating apparatus; said piston being a two-piece assembly, whereas the topside portion, or traditionally known as the crown, being of relative disc... | 03/19/1996 |
| 5480847 | Brake assembly A hydraulic brake piston (11) is formed of a clay based ceramic or conventional ceramic material, such as a kaolin based ceramic with a low thermal conductivity. The piston (11) may be incorporated in a disc brake assembly comprising a caliper body (10) p... | 01/02/1996 |
| 5440925 | Flow calibrator The invention relates to a high accuracy flowmeter for testing and calibrating flowmeters and the like, and more particularly to a positive displacement flowmeter which may include a cylinder (12), a piston (10) within the cylinder (12) which makes a clea... | 08/15/1995 |
| 5425306 | Composite insert for use in a piston An annular composite insert is cast which includes distinct particles such as cast iron dispersed throughout the base metallic alloy. The insert is then placed in a piston mold, and a piston cast such that the insert maintains a radially outer face genera... | 06/20/1995 |
| 5404792 | Piston for internal combustion engine A piston for an internal combustion engine comprises at least a pair of ribs arranged between an inner surface portion of a skirt and side portions of pin bosses. The ribs are symmetrical with respect to a thrust center line of the piston and have in a lo... | 04/11/1995 |
| 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 |
| 5327813 | Wrist pin having a ceramic composite core An engine component assembly is disclosed having a bi-material wrist pin which secures a piston rotatably to an associated connecting rod. The bi-material wrist pin includes a cylindrical ceramic core. Surrounding the cylindrical core is a tubular shell w... | 07/12/1994 |
| 5309818 | Method for the manufacture of a cooled piston A cooled piston head and method of manufacture, the piston head having a closed cooling chamber. In one embodiment, the piston head is formed of a top member, an intermediate member and a pin boss member joined to each other preferably by welding; the top... | 05/10/1994 |
