Class 92/231 - Welded, brazed or soldered (260)

Subclass of Class 92 - Expansible chamber devices
Definition: Apparatus comprising a welded, brazed or soldered joint.
No. of patents: 42
Last issue date: 09/06/2011

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Number	Title	Issue Date
8011288	Piston, especially cooling channel piston, comprising three friction-welded zones A piston, especially a cooling channel piston of an internal combustion engine, has an upper part and a lower part which can be produced separately from each other and subsequently be assembled. The upper part has at least three radially peripheral joining webs and ...	09/06/2011
7918155	Piston with a cooling gallery A piston for an internal combustion engine is provided. The piston crown includes an interior surface that defines at least in part a cooling gallery and a cooling gallery surface within the piston. An annular surface may defines at least in part an annular passagew...	04/05/2011
7143685	Monobloc piston having open floor A monobloc piston assembly has at least two parts fixedly joined together forming a piston body having an oil cooling gallery. The oil cooling gallery is defined by an upper wall, a lower wall, and a pair of radially spaced inner and outer annular walls. A skirt is ...	12/05/2006
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
6862976	Monobloc piston A monobloc piston has at least two steel parts welded together to define an inner cooling gallery. An outer ring belt is spaced from an inner annular support wall and is joined by a combustion bowl and a lower wall. A pair of pin bosses have axially aligned pin bore...	03/08/2005
6840155	Multi-axially forged piston A multi-axially forged mono-bloc piston includes a lower crown part forged of steel and including a pair of pin bosses and an integral skirt formed as one piece with the pin bosses 20. The lower crown part is friction welded to an upper crown part to form at ...	01/11/2005
6789460	Multipart cooled piston for a combustion engine A multipart cooled piston for a combustion engine has a piston upper part of steel comprising a combustion bowl and a ring wall with ring belt, and a piston lower part comprising a piston skirt, pin bosses for receiving the piston pin connecting the piston to the co...	09/14/2004
6651549	Dual gallery piston A heavy duty diesel piston includes upper and lower portions joined across a friction weld and internally contoured to provide a dual gallery structure including an outer annular gallery and a central gallery joined by passages for communicating cooling o...	11/25/2003
6588320	Piston having uncoupled skirt A piston (10) particularly suited for heavy duty diesel engine applications includes upper and lower crown sections (28, 30) joined by a friction weld (32) to define an annular ring belt (14) formed with ring groves (22) and having a lower end (20) and an...	07/08/2003
6526871	Monobloc piston for diesel engines A steel monobloc piston for diesel engines is formed with a relatively short piston skirt whose lower edge resides below the axis of the pin bores of the piston, but located at or above a lowest tangent point of the pin bores. The piston body preferably h...	03/04/2003
6525289	Piston for magneto-rheological fluid systems and method for its manufacture The piston for a magneto-rheological fluid system is manufactured from a piston skirt of a material having a high magnetic permeability and a piston plate which closes one end of the piston skirt having a low magnetic permeability and therefore must be ma...	02/25/2003
6477941	Dual gallery piston A heavy duty diesel piston includes upper and lower portions joined across a friction weld and internally contoured to provide a dual gallery structure including an outer annular gallery and a central gallery joined by passages for communicating cooling o...	11/12/2002
6467397	Constructed piston or piston consisting of components that are welded or soldered together A constructed piston 1 is comprised of an upper part 2 produced from forged steel, and a bottom part 3, said parts being joined with the expansion screws 4. The bottom part 3 consists of a forged part 6 produced from steel, with the bosses 7 and an approx...	10/22/2002
6327962	One piece piston with supporting piston skirt A one piece piston for an internal combustion engine has a piston skirt that is connected to a flange portion and a supporting portion of a piston body. The piston skirt provides support to the flange portion and a piston ring belt portion disposed about ...	12/11/2001
6279455	Method and apparatus for making a two piece unitary piston Past pistons have been susceptible to reduced longevity due to increased forces of combustion thereon during operating cycles of an engine. The present two piece unitary piston increases the longevity of pistons used with increased forces of combustion. F...	08/28/2001
6260472	One-piece integral skirt piston and method of making the same A one-piece piston (20) formed by an upper crown (28) and a lower crown (30) having an integral skirt (24, 26). The upper crown (28) includes an upper surface (32) and a lower surface (34, 42). The lower crown (30) includes an upper surface (50) and two p...	07/17/2001
6244161	High temperature-resistant material for articulated pistons This invention relates to a high temperature-resistant piston head. The piston head includes a first portion formed of a first material of heat-resistant steel alloy and the second portion is formed of a second a material of steel alloy that may be the sa...	06/12/2001
6155157	Method and apparatus for making a two piece unitary piston Past pistons have been susceptible to reduced longevity due to increased forces of combustion thereon during operating cycles of an engine. The present two piece unitary piston increases the longevity of pistons used with increased forces of combustion. F...	12/05/2000
6112642	Method and apparatus for making a two piece unitary piston Past pistons have been susceptible to reduced longevity due to increased forces of combustion thereon during operating cycles of an engine. The present two piece unitary piston increases the longevity of pistons used with increased forces of combustion. F...	09/05/2000
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
5515770	Piston having laser hardened primary compression ring groove and method of making same The piston made in accordance with the teachings herein includes a primary compression ring groove, a bottom and rear wall surface of which are hardened by the method of laser hardening. The method includes the steps of spraying the primary groove with a ...	05/14/1996
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
5421245	Piston-articulating pin-connecting rod assembly for reciprocating hermetic compressors The assembly is used in a reciprocating hermetic compressor of the type comprising a cylinder block (4), presenting a cylinder (11), within which a piston (20) reciprocates, a smaller eye (31) of a connecting rod (30) being introduced into and retained in...	06/06/1995
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
5301599	Pistons with ring groove reinforcing Pistons and a method for their manufacture are described. The piston has at least one piston ring groove reinforcing member being annular in form and having, in cross-section, upper and lower, generally radially extending face portions and a radially inne...	04/12/1994
5207147	Method for the manufacture of a piston head having a cooling chamber and piston head obtained from said method A method for the manufacture of a piston head having a cooling chamber is disclosed. The two portions composing the piston head are made separately; the underside of the upper portion is provided with a circumferential peripheral groove; notches are provi...	05/04/1993
5144885	Ceramic-metal friction welding member and ceramic cast-in bonded piston made thereof A ceramic-metal friction welded member includes a ceramic member formed with an annular notch in an outer circumference of its surface and a metal member joined onto the annular notch of the ceramic member by friction welding. A ceramic cast-in bonded pis...	09/08/1992
5094149	Pistons having a component incorporated therein Pistons and a method for making them are described. The pistons have reinforcing components, such as piston ring groove inserts, incorporated therein. The reinforcements have one or more porous bodies joined thereto, for example, by brazing and which are ...	03/10/1992
5065508	Two-piece piston and method of manufacturing the same A method for the manufacture of a two-piece piston wherein the top portion and the pin boss portion, which define the piston head, are fabricated separately by cold or hot forming, casting or sintering, and joined together by welding such as, for instance...	11/19/1991
4972898	Method of forming a piston containing a cavity A porous body is formed around an element which has the shape of the desired cavity and the body is heated to a temperature such that the element melts and infiltrates the porous body at least in the immediate vicinity of the resulting cavity. The article...	11/27/1990
4706550	Metal matrix composite piston head and method of fabrication An aluminum torpedo piston is provided with a piston head fabricated from a etal matrix composite material composed of aluminum and silicon carbide fibers that are integrally joined by an inertial welding technique. A 23% weight of silicon carbide fibers t...	11/17/1987
4664021	Treatment of pistons The detonation-resistant material is applied to a piston to reduce the likelihood of damage to the piston caused by pinking or knocking. The detonation-resistant material, which may be nickel or a nickel based material, is applied to the upper part of the...	05/12/1987
4648308	Internal combustion engine piston and a method of producing the same Disclosed herein is an internal combustion engine piston comprising a piston cap formed from a plurality of ceramic pieces, and a metal piston body, the piston cap being fixed to the top portion of the metal piston body, wherein the piston cap is made of ...	03/10/1987
4604945	Thermally insulated piston This invention discloses a thermally insulated piston having a cap portion and a body portion. The cap can be made of metal or ceramic. The cap and body portion are joined together by a brazing alloy. The cap portion can have a groove for receiving the br...	08/12/1986
4590901	Heat insulated reciprocating component of an internal combustion engine and method of making same A heat insulated reciprocating component, such as a piston or a valve, for an internal combustion engine comprises a main component body and a ceramic member secured to the body by interference fit with a metal connector which is brazed to the body. In on...	05/27/1986
4581983	Piston for internal combustion engines In a cooled composite piston having a cooling passage adjacent to the interface and a method of making same, the upper part consists of forged steel and is formed on its underside with ribs bearing on mating surfaces of the lower part. To improve the resi...	04/15/1986
4562327	Piston and process of providing wear-resisting surfaces in the ring grooves of an aluminum alloy combustion engine piston An arc welding process is used for form wear-resistant surfaces at least in the uppermost ring groove of aluminum alloy pistons for internal combustion engines. To reduce the manufacturing costs and to avoid an increase of the weight of the piston, the pi...	12/31/1985
4553472	Pistons and method for their manufacture A piston for an internal combustion engine is provided with a crown portion heat insulated from the remainder of the piston over all or substantially all of the area of the crown, to reduce the transfer of heat from the crown to the remainder of the pisto...	11/19/1985
4552057	Thermally insulated piston This invention discloses a thermally insulated piston having a cap portion and a body portion. The cap can be made of metal or ceramic. The cap and body portion are joined together by a brazing alloy. The cap portion can have a groove for receiving the br...	11/12/1985
4524498	Method and apparatus for modifying the combustion chamber of an engine to accept ceramic liners A method is disclosed of modifying a conventional internal combustion engine to accept ceramic material. A cast iron extension mamber is metallurgically joined to the cast iron engine block, the extension member having a wall defining a bore opening align...	06/25/1985

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Class 92/231 - Welded, brazed or soldered (260)