Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7389669 | Mechanical stress improvement process A process for reducing residual tensile stresses in high nickel-chromium alloy nozzle safe-end welds of pressurized water reactor nuclear pressure vessels such as are found at the reactor vessel inlet and outlet nozzles and the pressurizes surge, spray, safety and r... | 06/24/2008 |
| 6568711 | Self gapping socket weld fittings The present invention provides a positive gapping device for socket welded fittings. The positive gapping device comprises a socket fitting having a recessed area on at least one end for receiving a pipe section that is engageable with the recessed area o... | 05/27/2003 |
| 5358285 | Stress relief groove for drill pipe A joint of drill pipe is disclosed that has a tube section with upset ends to increase the wall thickness of the tube at its ends and tool joints connected to each end of the tube. Each tool joint has a cylindrical section connected to a weld neck of diam... | 10/25/1994 |
| 5199464 | Pipeline repair sleeve assembly having heat sink groove The assembly comprises a pair of semi-circular steel shells. The inner surface of one shell forms a centrally located, circular recess and a concentric groove positioned between the recess and the side edges of the shell. A flat cylindrical annular seal e... | 04/06/1993 |
| 5123451 | Pipeline repair sleeve assembly The assembly comprises a pair of semi-circular steel shells. The inner surface of one shell forms a circular recess. A flat cylindrical annular seal element is seated in and fills the recess. The element is resilient and deformable. It has concentric prot... | 06/23/1992 |
| 5069485 | Brittle lined pipe connector One or more rigid sealing segments are attached to pipe end sections and the assembly lined to form a fluid-resistant joint. A segment surface forms the primary sealing interface of lined pipe sections without the need for a conventional removable liner e... | 12/03/1991 |
| 4676528 | Method and apparatus for restoring tubular upsets A tubular upset extension apparatus which prolongs the usefulness of upsetted tubing joints used in drilling oil, gas and water well bore holes. The upset extension apparatus is fitted onto hollow bore tubing having shortened and specially threaded box an... | 06/30/1987 |
| 4300598 | Tubular steel members for underwater pipelines Tubular members of lightly alloyed weldable steel are utilized as a stiffening member for pipelines to prevent buckling and the spread of cracks in pipelines laid off the coast, either under or above water. The tubular member (R, R1) is constructed of cen... | 11/17/1981 |
| 4180104 | Out of contact highly geometrical crack arrestor A system for arresting cracks in a pressurized natural gas fluid pipeline comprising a plurality of bands encircling the pipeline each having a highly geometrical rim cross section and being out of contact with the pipeline along an arc of the inner circu... | 12/25/1979 |
