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| Number | Title | Issue Date |
| 7431321 | Trailer hitch assembly A trailer hitch assembly includes a receiver portion including a cylindrically-shaped cavity, a bushing member received within the cavity of the receiver portion, and a hitch member that includes a shaft pivotally received within the bushing member. At least a selec... | 10/07/2008 |
| 7390375 | Method and a device for connecting a plastic conduit and a plastic socket A method and a device for connecting a plastic line part in a plastic socket. A head end (9) of the line part (6) is heated contactlessly all the way round until the end curls over to a diameter that is greater than the inside diameter of the socket ( | 06/24/2008 |
| 7331582 | Gasket An annular gasket for affecting a watertight seal between two sections of corrugated pipe. The gasket comprises a seating portion dimensioned to fit within an annular recess in one of the mated sections of corrugated pipe, and a sealing portion integrally molded wit... | 02/19/2008 |
| 7243954 | Pipe joint with earthquake-proof function A pipe joint with earthquake-proof function is provided. A lock ring engages with an accommodating groove of a socket. A tapered surface converging toward the opening side of the socket is formed on at least one of a portion of the lock ring engaging the accommodati... | 07/17/2007 |
| 7207606 | Mechanical pipe joint, gasket, and method for restraining pipe spigots in mechanical pipe joint bell sockets A mechanical pipe joint, restraining gasket, and method for restraining pipe spigots within adjacent bell sockets. The restraining gasket is composed of two axially-separate components: a sealing portion and a restraining portion made of a plurality of arcuate locki... | 04/24/2007 |
| 7185894 | Watertight corrugated pipe gasket A corrugated pipe saddle gasket is provided having a leading member, a primary sealing member, and an arm member, with the gasket having a contoured surface extending along at least a portion of the bottom of the primary sealing member and the arm member correspondi... | 03/06/2007 |
| 7112038 | Blower muffler and vibration isolation An air impeller with both sound attenuation and vibration isolation means in a compact assembly. Three muffler chambers are provided preceding the inlet to the impeller each with sound absorbing foam material and vibration isolators are provided at both inlet and di... | 09/26/2006 |
| 7108289 | Restraining gasket for mechanical joints of pipes A gasket for connecting two lengths of pipe in a standard mechanical joint is disclosed, which gasket maximizes the advantages of both restrained push-on joints as well as mechanical joints, as are known commonly in the art. The invention has application to long-run... | 09/19/2006 |
| 7093863 | Restraining gasket for mechanical joints of pipes A gasket for connecting two lengths of pipe in a standard mechanical joint, which gasket maximizes the advantages of both restrained push-on joints as well as mechanical joints, as are known commonly in the art. The invention has application to long-run pipe lengths... | 08/22/2006 |
| 7083203 | Connecting element for connecting a fuel line to a fuel injector A connecting element for connecting a fuel line to a fuel injector having a first connecting sleeve, which may be inserted into a receiver opening in the fuel line, and a first sealing element positioned on the first connecting sleeve. The connecting element may hav... | 08/01/2006 |
| 7011345 | Pipe joint and couplers A pipe joint between cylindrical male and female couplers having terminal end portions with cooperating cam surfaces that facilitate assembly of the couplers. Cooperating projections on the couplers cam past one another when the couplers are assembled and restrain t... | 03/14/2006 |
| 6994381 | Stab joint coupling A pipe coupling for joining adjacent ends of first and second pipe sections. The coupling includes a generally cylindrical sleeve having first and second sides. The sleeve is formed as a sheet which is rolled to form the sleeve, wherein the first side of the sleeve ... | 02/07/2006 |
| 6964297 | Removable tube heat exchanger and header plate A heat exchanger design is described which includes header plates, apertures, seals and flow tubes. A plurality of apertures in at least one header plate are configured to allow a flow tube to be inserted into or removed from the aperture as a whole at an angle. A s... | 11/15/2005 |
| 6945540 | Sealing connection element, sealing end piece and a seal The invention relates to a sealing connecting element, a sealing end piece and a seal. In practice different seals are known which are produced as three dimensional structures and then given to the customer. The production, wherein profile strips are ready-made by c... | 09/20/2005 |
| 6938933 | Corrugated plastic pipe sections having flanged ends and structurally tight joints thereof Rigid corrugated plastic pipe sections are provided with a flange radially extending from at least one end of the pipe length, which allows structural and water tight joints between connecting flanged pipes and fittings to be formed in an assembly including a periph... | 09/06/2005 |
| 6905144 | Spring-loaded ‘L’-shaped seal ring A sealing system adapted for placement into an exterior groove of a structure. The sealing system includes a seal ring having a generally ‘L’-shaped cross-section. The sealing system further includes a canted-coil spring. The seal ring includes an inner surface,... | 06/14/2005 |
| 6854770 | Pipe or the like, a female end ring, and a method of manufacturing such a pipe or the like A pipe formed from a concrete cylinder has an end ring with a ferrule which can be snuggly mounted on one end of the pipe and a skirt axially adjacent to the ferrule for receiving a mail endpiece of another pipe. The ferrule is expanded as it is mounted on the cylin... | 02/15/2005 |
| 6712098 | Fuel hose, fuel hose connection method, and fuel hose connection structure A straight opposing member insertion section located at the end of a hose tube and has a ring-shaped groove for inserting a sealing ring. The opposing member insertion section has a ring-shaped tongue piece and/or a ring-shaped ring supporting section. Tongue-piece ... | 03/30/2004 |
| 6709025 | Vapor lead-through system for a rotary evaporator, and a rotary evaporator A vapour lead-through system for a rotary evaporator with a rotatable evaporator vessel (5) and a stationary cooler (7) consists of a vapour lead-through tube (6) and a connection piece (8). The vapour lead-through tube (6) is on t... | 03/23/2004 |
| 6665950 | Gas-heated infrared radiator for an infrared drying unit Known gas-heated infrared radiators for infrared drying units have a radiator housing (1) that is subdivided by a gas-permeable burner plate (5) in a distribution chamber (6) for the gas-air mixture and a combustion chamber (7), the front side of which em... | 12/23/2003 |
| 6499770 | Flexible duct for a microturbine A flexible duct for fluidly communicating between first and second components includes a first duct section with an intake end and an exhaust end. A first joint pivotally couples the intake end to the first component for pivotal movement about a first axi... | 12/31/2002 |
| 6457718 | Method of forming a pipe joint between metal pipes using an extensible gasket A pipe gasket and a method of forming a pipe joint between a metal spigot pipe and metal belled pipe. The gasket has three regions to facilitate a seal. A seal region forms the primary seal within the groove of the belled pipe. A sleeve region extending f... | 10/01/2002 |
| 6354634 | Coupling device for joining pipes A coupling device for joining pipe ends has at least one pressing sleeve which can be slipped on a pipe end and pressed together with the pipe end. The pressing sleeve is elastically designed in the area of its inner surface pressed on the pipe end so tha... | 03/12/2002 |
| 6345844 | Connector A cylindrical elastomeric sleeve 50 is attached to and held in a receive end portion of a tubular female member 40 made of a resin or a metal. When a tubular male member 30 is inserted, an annular projecting portion 31 of the male member 30 is engaged wit... | 02/12/2002 |
| 6343623 | Sealing ring for connecting the spigot of a corrugated pipe with a pipe socket having a smooth inside wall A sealing ring for sealing the connection of a spigot of a corrugated pipe with a pipe socket has inner beads and lip seals bearing against flanges. Said sealing ring further has an outwardly projecting sealing bead having a central annular bead and two a... | 02/05/2002 |
| 6299218 | Connecting structure between fluid channel A structure for connecting fluid channel of fluid delivery system is disclosed. This connecting structure limits the length of the flow-guiding pipe extending into the delivery channel, to reduce particle contaminates and the probability of crack. The pre... | 10/09/2001 |
| 6179339 | Seal rings for low loss flexible coupling of gas conduits A plastic or polytetrafluoroethylene split seal ring having highly flexible, annularly extending, axially spaced apart side walls is disclosed for sealing opposed, concentrically overlapping open end portions of a pair of gas conduits together or for seal... | 01/30/2001 |
| 6176526 | Expansion joint This disclosure relates to an expansion joint to connect two or more concentric bodies that are heated/cooled to different temperatures for the passage of liquid or gases. When the connecting portion is at an angle not in plane with the concentric bodies,... | 01/23/2001 |
| 6168208 | Seal for use with roof drains A sealing grommet is for use in coupling in sealed relation a drain pipe depending from a roof and a co-operating leader pipe. The bottom end of the drain pipe is inserted into the top end of the co-operating leader pipe. The outside diameter of the drain... | 01/02/2001 |
| 6082741 | Resilient pipe gasket A resilient gasket is disclosed for providing a seal between corrugated pipes having a plurality of concentric ribs on their outer surfaces, such as drain and sewer pipes to be buried in soil. The gasket comprises a base which is received around a first p... | 07/04/2000 |
| 6059323 | Expansion unit for piping adjustment An expansion coupling, for connecting a first conduit to a second conduit, has a housing that is open at opposite ends thereof. The conduits and at least one end of the housing have sealing means that comprise an interior sealing ring and an exterior seal... | 05/09/2000 |
| 5955162 | Calcium alumina cement lined pipe Cast iron pipe and other elongated hollow articles are lined with a cementitious mortar for certain applications, such as the transmission of potable water or sewage. To improve the resistance to attack from acids and to provide a crack and holiday free c... | 09/21/1999 |
| 5941070 | Flexible sealed conduit system A fluid conduit system, including silencer systems, including intake and exhaust systems for engines, blowers, compressors, pumps, and the like, includes first (16), second (22), and third (28) pipes, and first (34, 36) and second (38, 40) flex joints eac... | 08/24/1999 |
| 5848812 | Multi-adjustable air conduit system with differential sealing An air conduit system (10) has a male air tube (22), a plurality of annular gaskets (26, 28, 30) around the male air tube (22), and a female air tube (24) receiving the male air tube (22) and engaging the gaskets (26, 28, 30) in sealing relation. The inte... | 12/15/1998 |
| 5816626 | Spring lock coupling There is disclosed herein a tubular coupling comprising a first tube, a cage disposed on an end portion of the first tube, a bead for retaining the cage on the end portion of the first tube and a second tube telescopically engageable with the first tube. ... | 10/06/1998 |
| 5765880 | Pipe coupler A coupler for use with helical double-wall corrugated pipe is disclosed having a spigot portion and a bell portion. The spigot portion has at least one corrugation formed therein, a spigot portion first edge and a spigot portion second edge, and is adapte... | 06/16/1998 |
| 5700038 | Pipe connection assembly A connector assembly is provided for connecting two pipes of dissimilar material. In particular, an assembly is provided for connecting a first end portion of a first pipe to a second end portion of a second pipe formed as a bell housing having a larger i... | 12/23/1997 |
| 5687997 | Sealing gasket with lubricant rib and retainer element A sealing gasket and oval concrete pipe combination and method of producing the concrete pipe joint to improve the seal of the concrete pipe joint cooperatively formed between adjacent oval concrete pipes wherein the sealing gasket comprises a retainer el... | 11/18/1997 |
| 5649712 | Device for sealing an annular space having opposing flanges, a support bead, and sealing lip A device for sealing a space between an annular wall defining an opening and a pipe end portion introduced into the opening consists of a sleeve (2) having at one end thereof a flange (4) for restricting the introduction of the sleeve into the opening and... | 07/22/1997 |
| 5609368 | Separation preventive pipe joint A separation preventive pipe joint is provided, in which a locking ring is held by an elastic ring with its axis centered in a locking ring receiving groove. An outer peripheral projection is formed on an end portion of the spigot, the outer peripheral pr... | 03/11/1997 |
