Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8122812 | Piston and cylinder unit A piston and cylinder unit (1) includes a cylinder housing (2), a piston (7), a piston rod (18) and a securing element (20). The piston (7) includes an opening (13), at least one piston seal (11) and an inner t... | 02/28/2012 |
| 7900552 | Piston for cold chamber die-casting machine The object of the present invention is a piston for cold chamber die-casting machines comprising a body and at least one sealing band mounted around said body, wherein said body and said band are provided with coupling means suitable for concurrently obtaining both ... | 03/08/2011 |
| 7874242 | Piston assembly in fluid pressure cylinder The piston 4 comprises a fixing ring 8 mounted on a piston rod 6, and a piston body 10 fixed to the fixing ring 8. The fixing ring 8 is comprised of two semi-circular plated members 8A, 8B having plural threade... | 01/25/2011 |
| 7357066 | Sealing structure of an up-down type piston assembly for exhausting a content The disclosed sealing structure is used with a piston assembly which exhausts a content. A sealing washer has a sealing hole through which a screw pillar is inserted and is configured to be formed between a piston and a screw cap of the piston assembly. The sealing ... | 04/15/2008 |
| 7353749 | Piston retention apparatus and method An apparatus and method for coupling a piston member to a rod member to create a piston and rod assembly are provided. The piston and rod assembly may include a piston member having a longitudinal bore and first and second retaining passages in communication with an... | 04/08/2008 |
| 7350454 | Cylinder unit for mounting on a cross member and/or a table of a device or machine for the deformation of workpieces A cylinder unit for mounting on a machine for the deformation of workpieces includes a cylinder block and a pressure plate which is arranged on the surface of the cylinder block which faces away from the fastening surface, wherein a plurality of pistons each having ... | 04/01/2008 |
| 7341037 | Engine piston and manufacture An engine piston is manufactured by assembling an outer shell, comprising a crown and tubular side wall in which a ring groove region and skirt are defined, with a plate-like mounting member and bonding them together by brazing or welding. The mounting member is loc... | 03/11/2008 |
| 7322273 | Piston-piston rod retaining assembly for a hydraulic piston and cylinder unit A hydraulic piston and cylinder unit comprising the combination of a cylinder assembly defining a cylindrical chamber, a piston member mounted in the cylindrical chamber for reciprocating movement therein in response to movement of hydraulic fluid under pressure int... | 01/29/2008 |
| 7296507 | Piston for automatic transmission A piston for an automatic transmission, wherein a first piston member forming a cylindrical portion of the piston has a plurality of axial cutouts and a circumferential groove formed in one axial end portion thereof, and a second piston member forming a bottom porti... | 11/20/2007 |
| 7273004 | Reciprocating machine The radial piston or reciprocating engine (1) has annularly juxtaposed, radially directed piston-cylinder units (2, 3). The outward stroke of the pistons (2) is controlled by the cam (11) of a common eccentric shaft (12), whereas t... | 09/25/2007 |
| 7258060 | Piston and scraper assembly A piston and scraper assembly (26) for a high-pressure liquid chromatography column (1) is provided with a snap lock between the piston (5) and the scraper (25). The snap lock comprises a groove (23) in the piston wall (17),... | 08/21/2007 |
| 7255038 | Piston for automatic transmission A piston for an automatic transmission includes: (a) a cylindrical wall portion provided by a first piston member; (b) a bottom wall portion provided by a second piston member; and (c) an engaging portion at which the first and second piston members are engaged with... | 08/14/2007 |
| 7228788 | Piston structure for an air pump A piston for an air pump is disclosed. The piston has a piston rod having a connecting axle hole for positioning a bearing, which is protected with a bearing protection cap. The bearing is firmly secured within the axle hole. ... | 06/12/2007 |
| 7225726 | Piston for automatic transmission A piston for an automatic transmission, including a first piston member forming a cylindrical portion and a second piston member forming a bottom portion, wherein the first piston member has a plurality of engaging grooves formed in one of opposite axial end portion... | 06/05/2007 |
| 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 |
| 7174829 | Adjustable piston pump An adjustable piston pump for displacement and extraction of remnant from soft sand and or soft soil includes a pump casing cylinder that is capped at one end and opens at the other end. It includes a handle fixed to the pump casing cylinder, a shaft rod, a shaft ro... | 02/13/2007 |
| 7140824 | Tensioning hydraulic nuts A hydraulic tensioning system for nuts on studbolts has a puller bar and a puller buddy, which are coupled to the studbolt, and a bridge around the nut. The puller bar is internally coupled to the studbolt (and may engage the nut before the tension is applied). The ... | 11/28/2006 |
| 7134379 | Gas cylinder Disclosed is a gas cylinder, for improving sealing characteristics of the gas cylinder and improving convenience in manufacturing, including: a valve having a gas opening/closing pin at a through hole in its center, for intermittently passing a gas, and additionally... | 11/14/2006 |
| 7131418 | Cooled piston for an internal combustion engine The invention relates to a cooled piston (1) for an internal combustion engine comprising a cooling duct (2). This cooling duct encircles in an annular manner inside the piston head at the height of the ring part and is closed at its end, which is open... | 11/07/2006 |
| 7093361 | Method of assembling an actuator with an internal sensor A method of installing a piston position sensor proximate to a closed end of a hydraulic cylinder is provided. The sensor is attached to the face of a piston and that piston/sensor combination is inserted into the cylinder tube to position the sensor in the desired ... | 08/22/2006 |
| 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 |
| 7063004 | Piston assembly Apparatus and methods for assembling a piston assembly that comprises a piston comprising a head end flange and a crank end flange and a rod having a head end shoulder and a crank end shoulder. The head end shoulder of the rod contacts the head end flange of the pis... | 06/20/2006 |
| 6892625 | Double rod end cylinder with split ring coupling A fluid-actuated cylinder includes a piston rod with a circumferential groove. A split ring, with predetermined linear expansion properties, is cooled to a temperature below the temperature of the rod, and the ring halves are located in the groove. The ring is then ... | 05/17/2005 |
| 6837144 | Piston and cylinder unit including a housing, a piston and a piston rod A piston and cylinder unit includes a housing, a piston and a piston rod. The piston rod has an outer surface being designed to be symmetrical with respect to a first axis. The piston rod includes a protrusion and an outer thread being located on the protrusion. The... | 01/04/2005 |
| 6834575 | Piston assembly for a radial piston hydraulic motor The invention refers to a piston assembly for a radial piston hydraulic motor. The essence of the solution lies in that a longitudinal axis (12) of a roller (11) substantially coincides with an axis through centre of gravity of a piston body (2)... | 12/28/2004 |
| 6823769 | Device and method for fixing a piston or a piston rod attachment to a piston rod Method and arrangement for fixing a piston (1), or a piston rod attachment, to a piston rod (5), one of the piston (1) and the piston rod (5) having a hole (2) running in its axial direction, and the other of these having a portion... | 11/30/2004 |
| 6817278 | Piston assembly for hydraulic cylinder A piston assembly for use in a hydraulic cylinder includes a piston head configured to slide axially within the hydraulic cylinder in response to changes in hydraulic pressure. The piston head has an axial through-hole. A piston rod has a proximal end axially abutti... | 11/16/2004 |
| 6763758 | Multi-part cooled piston for an internal combustion engine A multi-part cooled piston for an internal combustion engine comprises a one-piece piston upper part having a combustion bowl and an annular wall with a piston-ring part, and a one-piece piston lower part having a box-like piston skirt, and bosses to receive the pis... | 07/20/2004 |
| 6637316 | Pressure fluid cylinder with optional anti-rotation feature A pressure fluid cylinder with anti-rotation feature, includes a cylinder tube of non-circular inner cross section and a piston which is sealingly received in the tube. The piston has a circular cross section and is connected at one end to a piston rod in... | 10/28/2003 |
| 6471496 | Piston pump for a vehicle brake system To enable economical production of a piston for a piston pump, the piston is made from a tubular deformed part and a closure plug, which is press-fitted with a protrusion into the deformed part. The piston has the advantage that the piston can be made wit... | 10/29/2002 |
| 6378304 | Hydraulic control device for motor vehicle clutch in particular A clutch control device (10) comprising a cylinder body (17) and a piston (21, 42) axially sliding in an inner bore (22) of the cylinder body (17) and at least a dynamic seal (59A, 59C) borne by the cylinder body (17, 17B). The cylinder body (17) comprise... | 04/30/2002 |
| 6327964 | Reciprocating pump The invention relates to a piston pump with a piston (10) that is guided so that it can move axially in a pump bore (12) of a pump housing (14). In order to simplify the manufacture of the piston (10), the invention proposes providing the piston (10) with... | 12/11/2001 |
| 6321951 | Dispensing apparatus A dispensing apparatus for dispensing a product from a container under pressure of a propellant by means of a composite piston (138). The apparatus has a valve (104) operated by means of an actuator (108) and a lever (166). The actuator co-operates with t... | 11/27/2001 |
| 6318236 | Reciprocal motion type compressor having a piston in which strength is increased There is provided a reciprocal motion type compressor which has a piston reciprocally movable in a cylinder. The piston has a piston cover and a piston body portion. The piston cover has an insertion portion engaged with the piston body portion. The inser... | 11/20/2001 |
| 6276261 | Piston assembly of a hydraulic radial piston-type machine A piston assembly of a hydraulic radial piston-type machine, an essential characteristic thereof being the arrangement of a roller element in a piston head. The portion of contact surface of the roller element lying close to a crown of the piston is alway... | 08/21/2001 |
| 6196125 | Sealing arrangement in hydraulic press A hydraulic press including a cylinder barrel, a piston and a seal housing. The cylinder barrel has an inner peripheral surface. The piston has a pressure side surface and is inserted in the cylinder barrel to form a chamber between the pressure side surf... | 03/06/2001 |
| 6062125 | Piston-cylinder assembly In a piston-cylinder assembly with a shaftless piston, the aim is to improve the lateral guidance of the connecting rod, to reduce edge wear and the seizing tendency in the event of fault during the combustion process. Consequently, the piston has at leas... | 05/16/2000 |
| 6035634 | Compact, resistance regulated, multiple output hydraulic tool and seal valve arrangement A hydraulic device includes a housing and a bulkhead disposed in the housing. A pump piston is provided in the housing and has first and second end surfaces with the second end surface of the pump piston and surfaces of the housing and of the bulkhead def... | 03/14/2000 |
| 5980214 | Fluid pump with split plungers A fuel pump (10) for supplying fuel to an internal combustion engine employs at least one composite pumping plunger (43) disposed within a plunger bore (46) for reciprocation therein. Each composite plunger comprises at least a high-pressure plunger eleme... | 11/09/1999 |
| 5979295 | Hydraulic motor piston The present invention relates to a piston intended for a hydraulic radial piston motor and being of the type comprising an outer cam ring having an undulated inner cam surface, an inner cylinder block which is rotatable relative to the cam ring and has ra... | 11/09/1999 |
