Did You Know...
...that the Band-Aid Bandage was invented by a Johnson & Johnson employee whose wife had cut herself? Earl Dickson's wife was rather accident prone, so he set out to develop a bandage that she could apply without help. He placed a small piece of gauze in the center of a small piece of surgical tape, and what we know today as the Band Aid bandage was born!
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 |
| 7427190 | Hydraulic device for pumping molten metal and/or controlling a molten metal flow A hydraulic device for pumping molten metal and/or controlling its flow, comprising an enclosure that forms internally a cylindrical chamber, for the connection of at least one first duct and one second duct for the passage of molten metal, within which a piston can... | 09/23/2008 |
| 7311075 | Split piston for an internal combustion engine The invention relates to a split piston for an internal combustion engine, comprising an upper piece, connected to a lower piece, by means of a screw connection. The screw connection comprises a tubular connector piece, mounted on the underside of the piston upper p... | 12/25/2007 |
| 7302927 | Two-part piston for an internal combustion engine Proposed is a two-part piston 1 for an internal combustion engine, having an upper part 2 that has a pin 31 having an outside thread 32 on the underside of its piston crown 4, and having a lower part 3, which is connected wi... | 12/04/2007 |
| 7134383 | Piston arrangement The invention concerns a piston arrangement having a piston with a piston head and a piston skirt with a circumferential surface, and a connecting rod, which is connected with the piston via a ball joint comprising a ball, and penetrated by an oil supply channel, wh... | 11/14/2006 |
| 7100494 | Piston arrangement The invention concerns a piston arrangement having a piston with a piston head and a piston skirt and a connecting rod, which is connected with the piston via a ball joint arrangement comprising a ball, the ball being held in the piston by means of a safety element.... | 09/05/2006 |
| 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 |
| 7003878 | Method for producing a ring support with a sheet metal cooling channel welded thereon The invention relates to a method for producing a ring support (1) with a sheet metal cooling channel welded thereon (5), which is transfused later with an aluminium melt for producing a piston. The aim of the invention is to improve the production of ... | 02/28/2006 |
| 6994014 | Closed cavity piston for hydrostatic power units and method of manufacturing the same Disclosed is a closed cavity piston made from a metal injection molding process. The piston has an elongated cylindrical body with a first end that is adapted to receive a slipper. The piston also has at least one hollow compartment and a hollow stem that transports... | 02/07/2006 |
| 6904876 | Sodium cooled pistons for a free piston engine A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each operatively located in a respective one of the engine cylinders, wit... | 06/14/2005 |
| 6662709 | Hollow piston for a piston engine and method for producing a hollow piston A hollow piston (1) piston engine including a closed annular cavity (9). Said hollow piston constituted of a first piston part (1a) with a base section (3) from which a joint part (4) extends in one axial direction, and from which a peripheral wall (6) th... | 12/16/2003 |
| 6532655 | Method of manufacturing hollow piston for compressors A method of manufacturing a hollow piston for variable displacement swash plate compressors of air conditioning systems is disclosed. This method produces a desired hollow piston by separately forming a body and a cap and by simply machining the body and ... | 03/18/2003 |
| 6526869 | Piston for compressors and method for producing the same A hollow piston has an end wall that receives the pressure of a cylinder bore of a compressor. Several reinforcing ribs are formed on the inner end face of the end wall. The ribs extend radially from the axis of the piston. Therefore, the piston is light ... | 03/04/2003 |
| 6293185 | Piston for a hydrostatic cylinder block A piston for use in the cylinder block of a hydraulic power unit. The piston has an elongated cylindrical body and one end terminating in a spherical surface. The piston is composed of a body and insert which are made from different materials, preferably ... | 09/25/2001 |
| 5988044 | Piston having insulated cap Disclosed is a piston having a cylindrical body made from a thermosetting molding compound. The body has a central well and a molded-on metal cap having sides that extend downward over the exterior of the body and into the well. There is insulation under ... | 11/23/1999 |
| 5461966 | Measuring gas pump A measuring gas pump (1) has a pump chamber (3) closed by means of a working diaphragm (6). The strokes (double-headed arrow 26) are imparted to the working diaphragm (6) by way of a connecting rod or like lifting mechanism (9) from a crank mechanism (10)... | 10/31/1995 |
| 5394788 | Head for articulated 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... | 03/07/1995 |
| 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 |
| 5282411 | Heat-insulating piston with middle section of less dense but same material This heat-insulating piston has a piston head comprising a piston head base portion consisting of a ceramic material, a heat-insulating member jointed to the piston head base portion and consisting of a whisker fired member of the same ceramic material as... | 02/01/1994 |
| 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 |
| 5147094 | Substantially zero leakage path sealing assembly with insulating member This invention relates to a fluid sealing mechanism for the inside diameter and/or the outside diameter of a piston-cylinder arrangement. This device results in substantially zero seal leakage path with low differential seal pressure required using only o... | 09/15/1992 |
| 5085185 | Powder-lubricant piston ring for diesel engines A powder-lubricated piston is disclosed for diesel engines, particularly adiabatic diesel engines and coal-water slurry fueled diesel engines. Rings are provided for the piston which flex in response to combustion within the combustion chamber.... | 02/04/1992 |
| 5031511 | Piston for an hydraulic brake, in particular for automotive vehicles A piston for an hydraulic brake is of the kind comprising an insulating core member and a cup member, joined together by fastening means arranged between the core and cup members. This fastening means is constituted as follows. The base portion of the cup ... | 07/16/1991 |
| 4939984 | Investment-cast piston crown cap with encapsulated non-metallic insulating core Pistons for internal combustion engines, particularly compression ignition engines. The pistons have insulating crowns and include a crown having a cap thereon, extending over the crown surface area, the crown cap being composed of an iron-based or a nick... | 07/10/1990 |
| 4891875 | Method for manufacturing a piston for an internal combustion engine A method of manufacturing a piston of an internal combustion engine includes holding a soluble core to a plurality of first projection portions and a plurality of second projection portions and a plurality of third projection portions formed in a pair of ... | 01/09/1990 |
| 4848291 | Heat-insulating piston structure The heat-insulating piston structure according to the present invention is formed by fixing a piston head, which consists of a material the coefficient of thermal expansion of which is substantially equal to that of a ceramic material, to a piston skirt, ... | 07/18/1989 |
| 4831917 | Multiple piece piston for an internal combustion engine A multiple piece piston is provided for a diesel internal combustion engine having a combustion chamber depression in the crown of the piston. In order to achieve a low rate of heat flow into the piston ring area and thus into the cylinder liner which sur... | 05/23/1989 |
| 4742759 | Ceramic insert cast piston Disclosed herein is a ceramic insert cast piston for an internal combustion engine which includes a head made of ceramic, a metal ring fitted around the peripheral portion of the ceramic head, and a piston body made of a metal by casting a metal around th... | 05/10/1988 |
| 4736676 | Composite piston A composite piston structure is disclosed which provides a simple and reliable means for joining a carbon-carbon or ceramic piston cap 11 with a metallic piston body 13. Attachment is achieved by means of a special geometry which compensates for differenc... | 04/12/1988 |
| 4651629 | Piston of refractory materials, particularly for compression-ignition engines A piston (2) is of refractory materials, particularly for a compression-ignition engine of the type having a head (4), a skirt (6) and their mutual fastening means. According to the invention, this skirt (6) is formed entirely of a refractory material and... | 03/24/1987 |
| 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 |
| 4599772 | Method for reinforcement of pistons of aluminum or aluminum alloy The reinforcement of the crown of a piston of aluminum or aluminum alloy for an internal combustion engine comprises the preparation of a reinforcement member (10, 13) which is provided with apertures (11, 14), or reentrants. The reinforcement member is p... | 07/15/1986 |
| 4593608 | Lightweight piston-rod assembly for a reciprocating machine In a reciprocating machine, there is provided a hollow piston including a dome portion on one end and a base portion on the opposite end. The base portion includes a central bore into which a rod is hermetically fixed in radial and angular alignment. The ... | 06/10/1986 |
| 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 |
| 4531502 | Thermally insulated piston A thermally insulated piston for an internal combustion engine comprises a cast piston with a top wall having an annular recess, a cast iron annular cap in the recess, and a low thermal conductivity honeycomb structure between the cap and the bottom of th... | 07/30/1985 |
| 4493292 | Heat piped piston A piston having an evaporation-condensation heat pipe to transfer heat between piston crown and piston skirts. The evaporation-condensation heat pipe is formed as a structure separate from the piston itself, and the two are joined together by a high condu... | 01/15/1985 |
| 4450610 | Method of making a piston A piston composed at least in part of fiber-reinforced synthetic resin material, is provided with a piston base or bottom, a piston shaft or shank, and eyes for engagement with a member to be driven by or for driving the piston. According to the method of... | 05/29/1984 |
| 4375782 | Composite piston for internal combustion engines A composite piston for internal combustion engines having a lower part and an upper part composed of ferrous material and joined together by a centering screw-threaded ring, is provided with the screw-threaded ring which comprises internal screw threads a... | 03/08/1983 |
| 4372194 | Internal combustion engine piston Internal combustion engine piston of the composite type, having a steel upper portion surmounting an aluminum lower portion in which the piston ring grooves are provided. The lower portion (2) comprises a concentric circular cavity (3), open at the top an... | 02/08/1983 |
| 4270494 | Insulated oil cooled piston assembly An oil cooled diesel engine piston is designed to restrict heat loss from the combustion chamber through provision of a combustion chamber insert defining a central non-oil-cooled chamber and a surrounding annular insulating air gap. The air gap controls ... | 06/02/1981 |
