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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7240538 | Hydro test apparatus and method for ammunition An apparatus for hydrotesting a hollow component includes a generally cylindrical main body having a bore therethrough that defines first and second open ends, the bore including a central axis; first and second end plates fixed to the main body for closing t... | 07/10/2007 |
| 7159450 | Method and apparatus for assembling and testing a fluid conduit A method and apparatus for assembling a fluid conduit assembly and testing the fluid conduit for leaks. Clipping devices support fasteners at a position remote from the conduit. According to the invention the fasteners can be loaded into clip nests provided by the c... | 01/09/2007 |
| 7036346 | Apparatus for exposing a pipeline to high internal pressure An apparatus for exposing a pipeline to a high internal pressure of the order of 1000 to 15000 bar, having at least a first, substantially stationary receiving device for a first end of the pipeline and a second receiving device for a second end of the pipeline, whe... | 05/02/2006 |
| 6997044 | Test system for a flexible tube A system is provided for testing a flexible tube. First and second hollow mandrels are inserted into opposing ends of the tube. Each mandrel has a conically tapered portion at one end thereof and a cylindrical portion extending from the conically tapered portion. Th... | 02/14/2006 |
| 6725706 | Device and method for blowing down and measuring the back pressure of chemical reactor tubes A device for measuring the back pressure in chemical reactor tubes includes many automated features. Inflatable tube seals may be automatically inflated. The device may measure several tubes at once. It may transmit data electronically to a remote computer for analy... | 04/27/2004 |
| 6619104 | Continuous testing device for water pipe A continuous testing device for a water pipe, comprising a frame, a left fixed plate and a right fixed plate, a tested pipe section, a compensating pipe section, a central plate, two horizontal oil pressure cylinders, a vertical oil pressure cylinder, and... | 09/16/2003 |
| 6487893 | Apparatus and method for pressure testing the sealing engagement of the fittings associated with the communication lines of a well tool A system for pressure testing the seals and fittings associated with at least one communication line passing through a well tool mandrel, each communication line housed within a communication line conduit defined through the well tool and sealingly engage... | 12/03/2002 |
| 6223587 | Device and method for permanently controlling the tightness of closing lids of containers for radioactive materials Device for checking the tightness of covers on a heavy metal container for transport and/or storage of radioactive materials, the said container comprising a cavity for nuclear materials delimited by a thick cylindrical shell closed at one end by means of... | 05/01/2001 |
| 6167749 | Method and apparatus for automatically detecting gas leak, and recording medium for leak detection A method of the present invention automatically detects gas leak from a valve on a gas-containing vessel, or the like, based on detected absolute pressure and pressure fluctuation. The method can detect both fine leak and gross leak. The method comprises ... | 01/02/2001 |
| 5660417 | Indicator for maintaining seals in flange assemblies A deformation indicator is disclosed for repeatably adjusting the fasteners on a flange assembly to maintain a leak-free joint. The indicator is mounted on one of the fasteners used for fastening together the flange members, and extends to a predetermined... | 08/26/1997 |
| 5616854 | Apparatus for pneumatically testing pipes for leaks An apparatus for testing a section of pipe for leaks, includes mirror-image first and second portions each having an attachment assembly for attaching the portion to the section of pipe to be tested, an enclosure device for enclosing the section of pipe, ... | 04/01/1997 |
| 5587521 | Pipe testing system This invention relates to a mobile pipe testing system. The system carries its own supply of a test fluid and an independent power source. During operation, a pipe is lifted by an inbound conveyor and is delivered to a pre-test station, from which it is l... | 12/24/1996 |
| 5550532 | Method and device for containing fuel spills and leaks A device and method for containing spills and leaks from fuel handling equipment is provided in which differential sensing means detect the presence of hydrocarbons and nonhydrocarbons such as water. Signals and the responses generated according to them m... | 08/27/1996 |
| 5481902 | Pipe testing system This invention relates to a mobile pipe testing system. The system carries its own supply of a test fluid and an independent power source. During operation, a pipe is lifted by an inbound conveyor and is delivered to a pre-test station, from which it is l... | 01/09/1996 |
| 5419184 | Hydrostatic pressure testing apparatus Hydrostatic pressure testing apparatus for sealing and delivering fluid into a pipe wherein the pipe wall is maintained in tension. A pair of cam actuated movable jaws are mounted on a body for engaging the outer wall of the pipe. A seal ring on a mandrel... | 05/30/1995 |
| 5337598 | Leak test port plug A leak test port plug device is disclosed which includes a resilient plug having a first portion which is substantially cylindrical and a second portion which is generally conical and formed in integral one-piece relationship to the first portion. When th... | 08/16/1994 |
| 5255559 | Apparatus for testing the gas-tightness of a joint between hollow members An apparatus for testing the gas-tightness of a joint between hollow members which has, in one aspect, a mechanism for applying a test gas to the outside of a joint, detection apparatus for detecting the gas inside the hollow members, and wherein the mech... | 10/26/1993 |
| 5029614 | Tandem seal system for testing pipelines A traveling seal system for blocking a predetermined section of fluid transmission pipeline for repair or modification or for pressure testing the pipeline includes two seal devices which are interconnected by a flexible cable and are supported for traver... | 07/09/1991 |
| 4905502 | Pressure vessel fatigue test system A pressure vessel fatigue test system has an adjustable mounting arrangement for a pressure vessel that can have open ends or closed ends, and which is to be subjected to a very high value, short duration pressure pulses, under controlled test conditions,... | 03/06/1990 |
| 4813456 | Hydraulic flange seal clamp A hydraulic flange seal clamp for sealing a flanged valve opening, to permit hydrostatic pressure testing of the valve, includes a pivotable connection structure between a seal member which overlies and seals the flanged opening, and a moveable piston whi... | 03/21/1989 |
| 4646561 | Method and apparatus for hydrostatic testing of tubular member Method and apparatus to hydrostatically test tubular members including a housing to enclose each end of the tubular member, which housing supports a unitary seal-lock ring assembly, the assembly having an annular resilient body with non-resilient L-shaped... | 03/03/1987 |
| 4537407 | Apparatus for testing pipes by a pipe tester A sealing arrangement around an end of a pipe received in a testhead of a hydraulic pipe testing apparatus, which sealing arrangement consists of an elastic sealing ring and an adjacent, rigid support ring of varying diameters. Both rings are mounted in r... | 08/27/1985 |
| 4502323 | Method and apparatus for performing a hydraulic pressure test on a tube A method of performing hydraulic pressure test of tubes includes the step of performing hydraulic pressure test of the tube. The ends of a test tube are sealed by using closing caps at the respective opposite ends of the test tube which has been filled wi... | 03/05/1985 |
| 4458522 | Hydrostatic pipe tester and method A hydrostatic pipe tester is especially designed for testing pipe at high pressures safely. Threaded tension rods are supported on both sides of the pipe under test such that their axes are coplaner with the pipe under test, and coupling assemblies couple... | 07/10/1984 |
| 4435006 | Automatic pressurized connecting device An automatic pressurized connecting device having a wide angle of attachment and in which thermal seizure is eliminated. The device includes a main frame mounted on wheels which run on rails, a rotary shaft fitted on the main frame, a first bracket mounte... | 03/06/1984 |
| 4416147 | Apparatus and method for hydrostatically testing pipe An apparatus and method for hydrostatically testing pipe is disclosed. Means are provided for externally exerting a force against test plugs sealing the ends of a pipe being tested to oppose forces tending to push the test plugs out of the ends of the pip... | 11/22/1983 |
| 4413501 | Apparatus for pressure testing tubing An apparatus for the pressure testing of tubing has two support members which can be urged towards one another, one of which forming a counterbearing for the tubing and the other having a spigot with a conical face which is at least partially insertable i... | 11/08/1983 |
| 4377185 | Hydrotest apparatus The invention contemplates removable end-closure structure for sealed application to the end of a pipe of given outside diameter for hydrostatic pressure-testing the pipe. In the form disclosed, a circumferential wedge clamp is applied to the outer surfac... | 03/22/1983 |
| 4362049 | Method and apparatus for leak testing the interior of pipe Method and apparatus for internally applying fluid pressure in order to determine the leak resisting characteristics of pipe, by gravitating a pipe into an elongated upwardly opening trough filled with a noncompressible fluid, such as water. The pipe is s... | 12/07/1982 |
| 4305277 | Hydrostatic tester for plastic lined pipe and fiberglass pipe An elongate hydrostatic tester that includes two longitudinally spaced resilient packers, and a pair of oppositely disposed, pivotally supported rigid wings that are spring-loaded, and which wings at all times tend to pivot outwardly from a first position... | 12/15/1981 |
| 4237723 | Control means for a pipe tester A transducer control arrangement in a hydrostatic pipe testing machine or pipe tester, for preventing a change in the positioning of the pipe relative to a testhead seal as testing fluid is introduced into the pipe. A transducer signal activates at least ... | 12/09/1980 |
| 4211107 | Pipe testing machine with clamping pressure keyed to hydrostatic test pressure A pipe testing machine wherein clamping pressure on the ends of a plastic pipe being tested under internal water pressure is maintained proportional to the internal pressure so as not to crush the ends of the pipe.... | 07/08/1980 |
| 4127026 | Pipe detecting arrangement for an hydrostatic pipe testing apparatus An arrangement in a testhead of an hydrostatic pipe testing apparatus for tripping a limit switch, which is connected to a control for a main hydraulic piston cylinder assembly for the testhead, upon the pipe's contact with the arrangement thereby interru... | 11/28/1978 |
| 4070904 | Pipeline joint tester A high-pressure joint tester includes a pair (or two pairs) of plugs, each plug having an annular rigid channel containing an inflatable elastomeric annular tube. The spaced, parallel plugs are joined together by a rigid cylindrical wall extending between... | 01/31/1978 |
