Bizarre Patents
An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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 |
| 7353645 | Material for gland packing and the gland packing A reinforcing member made from a fibrous material and disposed at least on one face of a strip-like expanded graphite to form a strip-like base member. The base member is stranded to be formed as a cord-like member. At this time, one side end edge of the base member... | 04/08/2008 |
| 7255353 | Flexible graphite sealing joint with metal jacket for high temperature The seal can be used at high temperature. It is composed of a central flexible graphite core (10) maintained in its shape by two metal cups (12) that do not touch. It is all surrounded by a tight sheath (15) enabling the flexible core (10... | 08/14/2007 |
| 7121554 | High-pressure sealing In a high-pressure cylinder with an axial plunger, a seal assembly for scaling the gap between the cylinder wall and the plunger. The assembly is disposed in an annual recess in the wall having an open end and a bottom opposite thereto, and comprises a plunger-seali... | 10/17/2006 |
| 7108058 | Packing assembly for rotary drilling swivels and pumps having rotating shafts A packing assembly for use with a rotary drilling swivel having a cylindrical wash pipe comprising a housing assembly including a packing gland forming a sealing assembly chamber around the wash pipe, the packing gland including an injection port in open communicati... | 09/19/2006 |
| 7021632 | Self-energized gasket and manufacturing method therefor A secondary seal gasket is formed of a graphite material for higher temperature applications. The gasket is formed by multiple wraps of a graphite ribbon and then is shaped in a mold to provide a U-shaped cross-sectional configuration having a self-energizing spring... | 04/04/2006 |
| 6572117 | Gland packing The present invention provides a gland packing in which a phenomenon where reinforcing fibers protruding from ends of adjacent braiding yarns overlap with each other, and the over-lapping reinforcing fibers are interposed over the whole range between expa... | 06/03/2003 |
| 6568689 | Gland packing The present invention provides a gland packing in which impairment of the sealing performance due to cracks that unwillingly occur in an end portion in the width direction of an expanded graphite tape of a braiding yarn in the gland packing can be suppres... | 05/27/2003 |
| 6488263 | Valve stem and method of manufacture; improved stem packing A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A ... | 12/03/2002 |
| 6273431 | Forged valve stem packing set A three-ring packing set for a forged valve stem is disclosed which includes upper and lower adapter rings formed from fiber reinforced graphite tape and each having a first density and a first axial thickness, and an intermediate preform ring formed from... | 08/14/2001 |
| 6270083 | Packing yarn made of graphite foil and plastic foil and method of manufacturing a packing yarn A packing yarn and a method of manufacturing a packing yarn utilize at least two bands that are at most 5 mm wide and are joined together by a yarn manufacturing method. The bands are formed of a laminate having at least one layer of flexible graphite foi... | 08/07/2001 |
| 6250604 | Valve stem and method of manufacturing, improved stem packing A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A ... | 06/26/2001 |
| 6247679 | Valve stem and method of manufacture; improved stem packing A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A ... | 06/19/2001 |
| 6182974 | Stuffing box packing assembly Compact stuffing box packing assemblies of the present application include high density metal inserted braided end rings of graphite which have each been die formed to have angled facing surfaces and a plurality of center Preform rings is disclosed In one... | 02/06/2001 |
| 6105596 | Sealing system A sealing assembly with a first molded graphite ring of generally triangular cross section, one side of which is in use perpendicular to the longitudinal axis of a rotatable and/or slidable shaft, the surface of which is to be sealed in an axial direction... | 08/22/2000 |
| 6082739 | Gland packing The present invention relates to a gland packing which is made of a material configured by laminating an expanded graphite tape into a spiral shape by winding. The gland packing can prevent penetration leakage through minute gaps existing in the laminated... | 07/04/2000 |
| 6027809 | Sealing material made of expanded graphite and a method of producing the same The present invention relates to a sealing material made of expanded graphite and to a method of producing it. In the sealing material made of expanded graphite of the present invention, a surface layer portion of an expanded graphite base material in whi... | 02/22/2000 |
| 5806858 | Compact five ring stuffing box packing assembly The compact five ring stuffing box packing assembly includes high density metal inserted braided end rings of graphite which have each been die formed to have angled facing surfaces. Three low density graphite preform rings having angled facing surfaces a... | 09/15/1998 |
| 5803464 | Gland packing The present invention relates to a gland packing which is made of a material configured by laminating an expanded graphite tape into a spiral shape by winding. The gland packing can prevent penetration leak-age through minute gaps existing in the laminate... | 09/08/1998 |
| 5716055 | Method of making packing material having expanded graphite dispersed throughout A minimum leakage packing system is provided for sealing pump shafts and the like. The packing is manufactured from twisted, exfoliated extruded, pultruded or slit graphite material that is braided, twisted, laid up or otherwise combined to form mechanica... | 02/10/1998 |
| 5687974 | Packing material having expanded graphite dispersed throughout A minimum leakage packing system is provided for sealing pump shafts and the like. The packing is manufactured from twisted, exfoliated extruded, pultruded or slit graphite material that is braided, twisted, laid up or otherwise combined to form mechanica... | 11/18/1997 |
| 5671929 | Lenticular sealing ring with alternating graphite and metal lamellae A lenticular sealing ring comprises alternately arranged lamellae (1) made of expanded graphite and metal lamellae (2). The density of the graphite lamellae (1) increases from the inside toward the outside of the sealing ring. The layering is configured s... | 09/30/1997 |
| 5549306 | Knitting yarn for gland packing and gland packing made of said knitting yarn A knitting yarn for gland packing according to the present invention has a composite structure comprising: a string-like body formed by folding an expanded graphite tape in the widthwise direction thereof, thus forming folded layers; a first reinforcing m... | 08/27/1996 |
| 5542681 | Graphite packing A fluid valve graphite packing assembly with graphite packing rings and thin PTFE disc rings surrounding an operating valve member. Softer graphite packing rings on the interior are bounded by progressively harder graphite packing rings. A PTFE disc ring ... | 08/06/1996 |
| 5522603 | Packing rings, method for production of the packing rings, and seal device using the packing rings A packing ring of a composite structure including a packing of expanded graphite and an annular mass of superposed sheets of expanded graphite is produced by a method including the steps of spirally winding a ribbon of expanded graphite into a roll, compr... | 06/04/1996 |
| 5499827 | Seal for shafts and valve stems A packing material having a resilient core and a uniform non-seamed exterior surface comprising a plurality of discrete compressible particles attached to the flexible core and to each other, the particles being compressed after attachment. The method com... | 03/19/1996 |
| 5478048 | Non-planar flexible graphite sealing rings A non-planar flexible graphite sealing ring is used to control leakage in a fluid handling device where a shaft extends through the wall of the device. The flexible graphite sealing ring comprises a chevron-shaped cross section having approximately comple... | 12/26/1995 |
| 5452904 | Stuffing-box packing A stuffing-box packing for establishing a seal between a housing bore and a rotatable shaft which has at least one packing ring comprising expanded graphite and a pair of disc-shaped stripper elements which are comprised of a suitable plastic or metal. To... | 09/26/1995 |
| 5395469 | Method of making an improved spirally-formed seal for shafts and valve stems A packing material for formation of a seal for a rotary or reciprocating shaft is disclosed wherein a core element is enveloped by a sheet of expanded graphite material. The core element is preferably formed of a wire mesh and solid graphite. The envelopi... | 03/07/1995 |
| 5370405 | Packing A packing for hermetically sealing a member. The packing in accordance with the present invention comprises braiding yarns each of which includes a plurality of longitudinally arranged reinforcing fiber yarns and expanded graphite integrally bonded to at ... | 12/06/1994 |
| 5339520 | Braided high-temperature packing A high temperature, high pressure resistant packing (e.g., for the packing gland of a valve stem) has a core of density 1.3-1.6 gm/cc that includes a plurality of strands, each strand including a flexible graphite tape, longitudinally corrugated and folde... | 08/23/1994 |
| 5301960 | Improved spirally-formed seal for shafts and valve stems A packing material for formation of a seal for a rotary or reciprocating shaft is disclosed wherein a core element is enveloped by a sheet of expanded graphite material. The core element is preferably formed of a wire mesh and solid graphite. The envelopi... | 04/12/1994 |
| 5299812 | Graphite packing A fluid valve graphite packing assembly with graphite packing rings and thin PTFE disc rings surrounding an operating valve member. Softer graphite packing rings on the interior are bounded by progressively harder graphite packing rings. A PTFE disc ring ... | 04/05/1994 |
| 5238252 | Shut-off fittings with a sealing device A shut-off fitting with a sealing device consisting of a packing casing and a packing gland for the actuation element of the valve has the packing casing including bores that hold the sealing elements. The packing has at least one grooved metal ring with ... | 08/24/1993 |
| 5228701 | Flexible graphite articles with an amorphous carbon phase at the surface An article, such as a seal ring, suitable for reduction of chatter when used in stuffing boxes with reciprocating stems. The article has an amorphous carbon phase at the surface of the article with the amorphous carbon phase extending into the article fro... | 07/20/1993 |
| 5201532 | Flexible non-planar graphite sealing ring A flexible non-planar graphite sealing ring is used to control leakage in a fluid handling device that is caused by a shaft extending through the wall of the device. The flexible graphite sealing ring comprises a chevron-shaped non-planar cross section ha... | 04/13/1993 |
| 5135240 | Mechanically-bonded, monolithic sealing ring for stuffing box including axially central portion made of compressed flexible foamed graphite tape A mechanically-bonded, monolithic sealing ring is provided for a stuffing box of a high temperature, high pressure valve or pump. In this ring, the components are pre-united by axially squeezing together originally separate center and end rings in a die a... | 08/04/1992 |
| 5134030 | Packing material and packing made of the same This invention relates to a packing used in sealing two members. As the packing material, by using a material having the surface of a flexible graphite sheet cut to a width of less than 5 mm with fibers, or a material prepared by laminating a flexible gra... | 07/28/1992 |
| 5131666 | Zero clearance anti-extrusion rings for containment of PTFE packing A packing containment assembly for sealing an operating member such as a shaft or stem in a fluid control valve, particularly where PTFE packing is used. A pair of zero clearance anti-extrusion rings of PEEK material are mounted in the shaft with the PTFE... | 07/21/1992 |
| 5050298 | Method of manufacturing a mechanically-bonded, monolithic sealing ring for stuffing box including axially central portion made of compressed flexible foamed graphite tape A mechanically-bonded, monolithic sealing ring is provided for a stuffing box of a high temperature, high pressure valve or pump. In this ring, the components are pre-united by axially squeezing together originally separate center and end rings in a die a... | 09/24/1991 |
| 4934657 | Graphite spiral packing for stuffing box and method for manufacturing the same A helical spacer, e.g. made of stiffly flexible nylon and having flat axially-presented surfaces, in slid onto a cylindrical mandrel, e.g. a die inside body. Flexible corrugated ribbon of expanded graphite is helically wound onto the mandrel between turns... | 06/19/1990 |
