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 |
| 5590676 | Stopper for opening in gas conduit wall The tool of the invention is used to insert and secure a stopper plug to close a hole in the wall of a pipe carrying fluid under pressure. This permits removal of a defective pipe fitting such as a tee or a valve. The stopper plug includes a toggle or anc... | 01/07/1997 |
| 5577528 | Apparatus for upgrade or repair of in-service pipelines A removable apparatus for upgrade of an in-service pipeline without disrupting the flow of fluid within the in-service pipeline. The removable apparatus comprises at least one enclosure having a top section and a bottom section for temporarily enclosing a... | 11/26/1996 |
| 5577535 | Method and equipment for the repair of the outer layer of submarine flexible pipings A method for repairing the outer layer of a submarine flexible pipe involves applying a resin mantle which is curable on contact with water to a damaged region of the outer layer of the flexible pipe. In order to do this, a sleeve of flexible material is ... | 11/26/1996 |
| 5566719 | Method for lining a branch pipe of an underground pipe A method is proposed for lining a branch pipe from the main pipe; in particular a special sealing mechanism is adopted in attaching the collar of a liner bag onto the flange of a fluid pressure sealing nozzle: stopper tacks are embedded in the collar at a... | 10/22/1996 |
| 5549856 | Method of repairing a pipeline with an injected resin A resin injection method and a pipeline repair method are provided for smoothly and rapidly performing setting of an open liner and for completing works such as eversion and insertion of the open liner even for a steeply inclined pipeline. An end portion ... | 08/27/1996 |
| 5527133 | Tool for a sewer robot The tool has a sheathing plate (34) having an outlet opening (39) for a spackling composition, to which outlet opening (39) a pressure line (12) for the forcing-in of a sealing composition can be connected. In order to reduce the time required for the rep... | 06/18/1996 |
| 5524675 | Pig safety device A safety device for automatically preventing an injectile propelled within a pipeline having a terminus from inadvertently escaping the pipeline at a coupling point. The safety device automatically engages upon decoupling, thereby safe-guarding the pipeli... | 06/11/1996 |
| 5524661 | Method of blocking a pipe and device therefor The invention relates to a method and a device for blocking fluid in a pipe 1 onto which a positioning unit 2 is hermetically mounted and through which a hole is drilled in the pipe while maintaining a hermetic seal. An expandable body 8 is inserted into ... | 06/11/1996 |
| 5520484 | Eversion nozzle, and a method for repairing an underground tubular conduit An eversion nozzle used in the operation of repairing an underground tubular conduit by lining the inner wall of the tubular conduit with an everted tubular liner bag impregnated with a hardenable liquid resin: the inventive eversion nozzle is a hollow st... | 05/28/1996 |
| 5518340 | Pipe support frame A pipe support frame for positioning a subsea pipeline. The support frame includes lower and upper skids which are maintained in vertical alignment with one another. The lower skid includes vertical lower skid members and the upper skid includes mating ve... | 05/21/1996 |
| 5515886 | Method and apparatus for repairing a junction pipe connection to a main pipe The connection between a residential junction pipe or the like and a sewer pipe is repaired by a cutter head that is led into the junction pipe and operates essentially with its front face. Thereby, it is unnecessary to locate junction pipes in a replaced... | 05/14/1996 |
| 5511578 | Tool for installing a stopper in a gas conduit wall The tool of the invention is used to insert and secure a stopper plug to close a hole in the wall of a pipe carrying fluid under pressure. This permits removal of a defective pipe fitting such as a tee or a valve. The stopper plug includes a toggle or anc... | 04/30/1996 |
| 5511573 | Contaminated valve containment device A contaminated valve containment device is provided which includes a leak-proof housing that is attachable to a leaking pipe member to prevent migration of contaminants to the environment. Disposed inside the housing is a catch pan for collecting contamin... | 04/30/1996 |
| 5509440 | Device for cutting a pipe in order to stop a fluid flow Device for cutting a pipe (1) transporting fluid in order to stop the circulation of the fluid at any point, comprising a casing (2, 3) susceptible of being sealingly mounted on the pipe (1). The casing (2, 3) contains at least one blade (8) which is driv... | 04/23/1996 |
| 5499659 | Process for the sealing and internal repair of systems of laid conduits A process for the sealing and internal repair of systems of laid conduits in which a sealant is introduced into the leaky conduit by means of air, the sealant being dry, finely ground, water-swellable bentonite; a dry, hydraulically disintegratable plasti... | 03/19/1996 |
| 5499660 | Relining pipe having pipe elements interconnected by pipe couplings A relining pipe for insertion inside sewer lines to repair them. The relining pipe is made up of a number of substantially rigid pipe elements (1), which are interconnected by pipe couplings, the pipe coupling including a female sleeve part (2) and a male... | 03/19/1996 |
| 5497808 | Fluid pressure line patch A line patch for use in repairing ruptures or leaks in fluid-carrying cylindrical pipes. One or more screw clamps, encircling a curved compression sleeve, are used to compress a resilient sealing member against a pipe rupture. For smaller diameter pipe (a... | 03/12/1996 |
| 5497807 | Apparatus for introducing sealant into a clearance between an existing pipe and a replacement pipe Apparatus is provided for introducing sealant into a clearance between a replacement pipe 9 and an existing pipe 36 within which in use the replacement pipe 9 is located. The apparatus comprises a nose-cone 1 having a tubular body 6 for connection to the ... | 03/12/1996 |
| 5490964 | Method and device for repairing a tubular conduit A method for repairing a tubular conduit by lining the inner wall of the tubular conduit with a tubular liner bag impregnated with thermosetting liquid resin, having the steps of: (a) everting the tubular liner bag in the tubular conduit; (b) closing the ... | 02/13/1996 |
| 5490744 | Method and apparatus for inflating and curing a resin impregnated manhole liner An apparatus and method for inflating and curing a resin impregnated liner include a resin impregnated liner lowered into an underground structure so that a portion of the liner extends beyond the structure. The protruding portion of the liner is then sea... | 02/13/1996 |
| 5487411 | Liner pipe for repair of a host pipe This invention relates to liner pipes and to their use in the repair of pipes, preferably in the trenchless reconstruction of underground pipes such as sewer lines. The liner pipe of the present invention comprises two layers, an outer layer comprised of ... | 01/30/1996 |
| 5483990 | In-line valve for insertion in a pressurized fluid flow line A valve adapted for insertion in a pressurized fluid flow line for blocking and sealing the flow of fluid through the line without disconnecting the line and to maintain the pressure in the upstream end of the line. The valve includes two body portions wh... | 01/16/1996 |
| 5482076 | Enhancing pipes A method is provided for replacing an existing service pipe carrying fluid to an outlet within a property with a replacement service pipe. In the method the outlet is disconnected within the property from the existing service pipe in such a way that both ... | 01/09/1996 |
| 5482404 | Underground pipe replacement technique The apparatus and technique of the invention constitutes a stationary hydraulic jack for pushing sections of new pipe which, in turn, push a frontal cone expander to break up the old pipe and define a path for the new pipe. Frontal apparatus located in fr... | 01/09/1996 |
| 5480263 | Soil displacement hammer for replacing underground pipes A mole is provided for use in replacing or preparing for replacement an existing underground pipe. The mole is sized to permit insertion into and movement along the existing pipe. The mole is provided with a front portion having a cutting edge for engagin... | 01/02/1996 |
| 5479961 | Method of plugging a heat exchanger tube and plug therefor A plug for sealing the open end of a tube located in an opening in a tube sheet of a heat exchanger is described along with a method of installing the plug. The plug is comprised of a generally cylindrical metallic body of ductile material that is inserte... | 01/02/1996 |
| 5477887 | Tubular liner for softlining pipe rehabilitation A tubular liner for use in softlining methods of pipe rehabilitation. The tubular liner is constructed of plastic materials or laminates of plastic material which have one or more resin-absorbing layers. The tubular liner of the present invention is made ... | 12/26/1995 |
| 5469891 | Method for relining underground pipelines The invention relates to a material wherein the main constituent is PVC for manufacturing pipes to be used for relining underground pipelines by the pipe in a folded condition being drawn into the pipeline and being engaged with the inside surface of the ... | 11/28/1995 |
| 5467795 | Methods of sealing annular space between inner and outer gas mains for tie-overs A method of tying over an individual customer service connection from a live outer gas main to an inner gas main inserted within the liver outer gas main comprises defining a generally annular region within the space between the inner and outer mains. The... | 11/21/1995 |
| 5465758 | Apparatus for sealing leakage points in pipes from the inside of the pipe, and a method of sealing the leakage points A resilient sealing sleeve supported by a mounting cart is directed to a leakage point in pipes in order to seal them. The sealing sleeve is raised to the top of the pipe by a raising and lowering device, and widened there in the circumferential direction... | 11/14/1995 |
| 5462077 | Apparatus and method for shutting off fluid flow in a pipe main An apparatus and method for shutting off fluid flow in a pipe main while repairs are being made requires only exposure of the top surface of a buried main and utilizes an anchor system installed in or above the excavation which supports an elongate tubula... | 10/31/1995 |
| 5458155 | System and method for slipliner renovation of semi-elliptical conduits A slipliner for renovating a semi-elliptical conduit such as a masonry sewer line. The bottom of a semi-rigid cylindrical liner pipe is split longitudinally and a floor panel is mounted across the bottom of the pipe to spread the edges of the cut. This be... | 10/17/1995 |
| 5454401 | Method of lining a branch pipe A branch pipe lining method of the invention utilizes a branch pipe liner bag impregnated with a hardenable resin and having a flange at one end thereof, wherein the flange is folded out and mounted to a fluid pressure sealing nozzle; the branch pipe line... | 10/03/1995 |
| 5452967 | Pipe laying system and method A system for simultaneously lining and cleaning an existing sewer pipe, and for laying horizontal pipe without digging a trench, includes a planetary gear assembly mounted on a drilling rig. A liner pipe or outer pipe which is to be laid underground is pl... | 09/26/1995 |
| 5451284 | Self-mobile work vehicle moveable through pipeline and method and apparatus for lining interconnecting branch pipe using the vehicle An electrically remote-controlled intra-pipe work vehicle is hydraulically actuated and is adapted to work with a lining equipment for lining interior of a branch pipe interconnecting with the main pipe in which the vehicle is positioned. The vehicle has ... | 09/19/1995 |
| 5451351 | Method for rehabilitating a pipe with a liner having an electrically conductive layer A lining and method for in situ rehabilitation of a pipe. The lining includes a tubular shaped resin impregnated composite having a conductive layer surrounding an inflatable bladder. The method includes the steps of positioning the lining within a pipe s... | 09/19/1995 |
| 5447664 | Method of lining an inner surface of a pipe An amount of resin necessary for lining an inner surface of a pipe is calculated. A lining pig is inserted in the pipe from an open end thereof, and the calculated amount of resin is supplied in the pipe from the open end subsequent to the insertion of th... | 09/05/1995 |
| 5447665 | Method of removal of replacement pipe installed in an existing conduit A thermoplastic pipe in a reduced shape having a memory for the reduced shape is heated to make it pliable for installation in an existing conduit to be lined. The pipe is then expanded by passing a heated fluid into a pipe, or by the use of an inflatable... | 09/05/1995 |
| 5443095 | Fluid blocking device A fluid blocking device for a pipeline having a saddle fitting over an opening in the wall of the pipeline. The device includes an elongated, resilient plug passable through the pipeline opening to block passage of fluid through the pipeline. A resilient ... | 08/22/1995 |
| 5439033 | Method of lining a branch pipe A branch pipe lining method ensures a reliable air-tight connection between a branch pipe liner bag and a fluid pressure sealing nozzle with a simple structure so that the branch pipe liner bag can be inserted into a branch pipe without fail. A branch pip... | 08/08/1995 |
