Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7126122 | Method for determining the safety of gas mixtures A method for determining the safety of a gas mixture containing first and second flammable components together with non-flammable components, comprises using an optical detector to make at least two measurements influenced by the concentration in the gas mixture of ... | 10/24/2006 |
| 7091487 | Non-dispersive ir measurement of gases using an optical filter A method and apparatus for determining the safety of a gas mixture containing flammable components such as methane together with ethane or other hydrocarbon, together with a diluent gas. The method includes the filtered infrared spectroscopy of the gas mixture in a ... | 08/15/2006 |
| 6990718 | Tee connection to a pipeline A method for securing a branch assembly to a pipeline includes positioning a first containment ring surrounding an area from which the branch is to extend, positioning a first annular seal within the containment ring to provide a first ring/seal arrangement, positio... | 01/31/2006 |
| 6985173 | Method and apparatus for obtaining information from a utility meter A method and apparatus for obtaining information from a utility meter. A digital camera is used to take a digital image of information displayed on the utility meter. The digital image is passed to a computer that is arranged to extract information displayed on the ... | 01/10/2006 |
| 6979025 | Joining of lined pipes A metal pipeline section that has a metal flange at one end is lined with a plastic liner such that some of the liner extends beyond the flange end of the pipeline section. An annular plastic member is electrofusion joined onto the outside of the portion of plastic ... | 12/27/2005 |
| 6898986 | Meter for the measurement of multiphase fluids and wet gas A meter for the measurement of the gas mass flow rate and total liquid mass flow rate of a two phase or multiphase fluid is disclosed. The meter comprises a series of three flow element, the firs element is arranged to mix fluids passing therethrough and the second ... | 05/31/2005 |
| 6884373 | Process for securing a branch assembly to a pipeline A method for securing a branch assembly to a “live” pipeline. An upper part of the assembly incorporating the branch is positioned on the pipeline over a containment ring located on the pipeline and within which is an annular seal surrounding an area from which ... | 04/26/2005 |
| 6716268 | Slugging control A method of controlling occurrence of slugging in a riser of a pipeline arrangement including a riser base and pipeline conveying a multiphase fluid system in which the gas phase may be natural gas. The upper end of riser is connected to a separator vessel. The gas ... | 04/06/2004 |
| 6680479 | Method and apparatus to detect the presence of water on a surface A water detecting apparatus includes a source of infra-red radiation which is reflected off an inner surface of a pipe wall onto a mirror directing the infra-red signal along a path to an infra-red detector connected by an electrical signal path to an ele... | 01/20/2004 |
| 6612341 | Securing shell assemblies to pipelines A method for securing a shell assembly to a pipeline. A two part shell assembly is secured to the pipeline and holds in position an annular sealing arrangement located about a predetermined area of the outer surface of the pipeline. The sealing arrangemen... | 09/02/2003 |
| 6578293 | Suction excavator A suction excavator including an air pump for generating a flow of air and a nozzle through which air is drawn under the influence of the air pump, the nozzle being arranged when in use to suck up spoil from an excavation, and a mechanism for separating s... | 06/17/2003 |
| 6573766 | Synthesizing a sine wave A method and apparatus for synthesizing an approximation to a sine wave comprising generating a number of pulse width modulated signals, each having a predetermine duty cycle and being the same frequency as each other, from a clock signal. The generated p... | 06/03/2003 |
| 6568911 | Compressor arrangement A hydraulic compressor arrangement includes hydraulic rams A and B with associated non-return valves. A hydraulic pump, typically electrically operated, provides a pressurized fluid source to operate rams A or B to allow the associated chambers to receive... | 05/27/2003 |
| 6539978 | Pipe lining A lining method for a host pipe (10) including lubrication of the host pipe prior to insertion of a thermoplastic liner (11) using tight fit techniques. After allowing the inserted liner to relax, the liner is partially pulled from within the host pipe us... | 04/01/2003 |
| 6539777 | Measuring leakage through ducts A pipe leakage detection system which includes a flexible probe with a body portion of sufficient length to pass along a pipe. Pairs of seals define a seal volume with the inner pipe wall. An adjacent test region can be used to determine leakage. A source... | 04/01/2003 |
| 6532801 | Portable apparatus and method for tracing a gas leak A method and apparatus for identifying the location of a gas leak source. The apparatus includes a gas detector for detecting the presence of gas and a wind direction indicator. The method traces a gas leak source location using the apparatus including th... | 03/18/2003 |
| 6517237 | Measuring energy consumption An energy meter which measures a volume of gas supplied, which measures a calorific value of the gas supplied, and which calculates an energy value corresponding to the measured volume of gas supplied and the calorific value. The structure to measure the ... | 02/11/2003 |
| 6516885 | Reducing water flow A water shut-off is provided in a hydrocarbon well by injecting a first chemical composition, effective as a relative permeability modifier polymer, into the hydrocarbon and a water zone of the well followed immediately by the injection of a second chemic... | 02/11/2003 |
| 6481288 | Measuring the speed of sound of a gas A method and apparatus for determining the speed of sound in a gas. An acoustic transmitter is arranged to apply an acoustic signal to the interior of a resonator and an acoustic receiver is arranged to detect the amplitude of the acoustic signal in the i... | 11/19/2002 |
| 6474137 | Measuring relative density of a gas A method and apparatus for measuring the relative density of a gas, for example natural gas. The gas is supplied through an inlet to a chamber and is output through an outlet. Using a control and an ultra-sonic transducer emitter and an ultra-sonic transd... | 11/05/2002 |
| 6456066 | Eddy current pipeline inspection device and method A pipeline inspection vehicle which can be towed through a pipeline via a cable. The vehicle includes a power unit, a master processor module, and a coil which generates an eddy current field which passes along the pipe. The resultant field is detected by... | 09/24/2002 |
| 6442996 | Method and apparatus for measuring the calorific value of a gas A method and apparatus for measuring the calorific value of a gas. The apparatus includes a chamber to which a gas in question, for example natural gas, is supplied through an inlet and leaves through an outlet. The speed of sound SoS at ambient temperatu... | 09/03/2002 |
| 6431262 | Thermosyphon radiators A thermosyphon radiator comprising a sealed panel containing a reservoir of water in a lowermost part of the panel and a heating member, e.g. a hot water pipe, extending through the lowermost part of the panel, the member being at least partially immersed... | 08/13/2002 |
| 6419725 | Process of forming a permeable gas separation material The process is characterised by sulfonating a partially brominated poly(phenylene oxide). The gas separation material so formed may be made into a membrane and is useful in separating component gases from a gas mixture.... | 07/16/2002 |
| 6394701 | Cable guide for pipes An apparatus which guides a cable through a conduit. The apparatus includes a guide device for receiving the cable. Passage of the cable through the guide device is permitted. Further, the guide device is automatically moved from a first position to a sec... | 05/28/2002 |
| 6348869 | Pipe leak detection A pipe leak testing arrangement which includes a device having sealing bags joined by a coupling. When inflated, the bags form a seal volume chamber. The bags may not form a perfect seal, and as a result leakage past the bags may occur when a differential... | 02/19/2002 |
| 6345431 | Joining thermoplastic pipe to a coupling A coupling comprises a tubular insert (20), having an external shoulder (22) and external circumferential projections (26) separated by circumferential grooves (28, 30), and a tubular sleeve (14) having a largest internal diameter less than the external d... | 02/12/2002 |
| 6318180 | Method and apparatus for determining a frequency at which a resonator resonates Determininig a frequency at which a resonator resonates comprising: driving an acoustic transmitter for applying an acoustic signal to the interior of a resonator by scanning through a first range of frequencies in substantially equidistant steps of a fir... | 11/20/2001 |
