Patents Represented by Attorney William R. Hinds
  • Patent number: 5967477
    Abstract: A clamp comprises a tubular support having a number of axially spaced sets of angularly spaced apertures for receiving spheres engageable with the exterior of a pipe and with tapered surfaces on a clamp body. A spring urges the support down in relation to the body to cause the spheres to grip the pipe. Rams can raise the support to release the clamp, whereupon the spheres can enter recesses in the body. The apertures may be axially elongated to accommodate a degree of pipe ovality and have diverging walls for the same purpose. A form of the clamp for gripping a pipe interior is also described. The clamp may have one or more seals for sealing against the pipe and two oppositely acting clamps may form a connector for two pipes.
    Type: Grant
    Filed: January 3, 1994
    Date of Patent: October 19, 1999
    Assignee: Robert Emmett
    Inventor: Owen Walmsley
  • Patent number: 5964291
    Abstract: Chemical treatment agents are supplied to a well or borehole extending through an earth formation by subjecting the well to a fracturing treatment with a high pressure fluid and proppant particles. The proppant particles are thereby trapped in fractures in the earth formation. Some or all of the proppant particles are of porous insoluble inorganic material, and are impregnated with a chemical treatment agent, such as a scale inhibitor or a corrosion inhibitor. The porous particles may be of a ceramic or oxide material, for example a silica and/or an alumina-based material.
    Type: Grant
    Filed: February 28, 1996
    Date of Patent: October 12, 1999
    Assignee: AEA Technology plc
    Inventors: Hugh Malcolm Bourne, Peter Arne Read
  • Patent number: 5955033
    Abstract: A rotary kiln in which reaction is to occur between counterflowing reactants and an injector for a reactant extends into a reaction zone in the kiln. The injector is provided with means for adjusting the temperature of the injected reactant to a temperature in the desired range for that zone. Further means are provided for maintaining a temperature in the desired range throughout the zone. The arrangement be used in the production of uranium oxides from uranium hexafluoride.
    Type: Grant
    Filed: September 15, 1993
    Date of Patent: September 21, 1999
    Assignee: British Nuclear Fuels Limited
    Inventor: Michael Richard Hayes
  • Patent number: 5954222
    Abstract: A fluid storage tank comprising a main body and covers to close off openings of the main body. The main body and covers have inside surfaces which are, in use, in contact with fluid stored in the tank the main body is made up of a casing and a liner which is provided inside the casing. The covers are releasable retained in place and seal with the inside surface of the main body so that fluid can be stored in the tank.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: September 21, 1999
    Assignee: Morris White PTY Ltd.
    Inventors: Garry Rodney White, Peter John Morris
  • Patent number: 5928616
    Abstract: In a solvent extraction method a contactor comprises a forward extraction section comprising sub-sections thereof and a back extraction section comprising sub-sections thereof. To enable higher concentrations of solute to be obtained in the backwash liquor, the contactor is operated with recycle of partially-loaded solvent, via a line from a back extraction sub-section to a forward extraction sub-section.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: July 27, 1999
    Assignee: British Nuclear Fuels PLC
    Inventor: Geoffrey Horrocks Bailey
  • Patent number: 5916431
    Abstract: During filtration, periodic application of a potential difference between an electrically conducting filter medium and counter electrode (as anode) generates a gaseous product at the filter and cleans the filter. To minimise corrosion the counter electrode is of low chromium stainless steel, for example 9% chromium.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: June 29, 1999
    Assignee: AEA Technology plc
    Inventors: Andrew Derek Turner, Ronald Keith Dawson
  • Patent number: 5902457
    Abstract: An apparatus for generating a liquid spray from two jets of fluid which issue from a pair of opposing nozzles and interact, wherein the fluid is supplied to the nozzles under fully turbulent conditions such that random variations in the momentum of the fluid as it leaves the nozzles occur which results in random variations in the orientation of the resultant spray of liquid drops.
    Type: Grant
    Filed: August 18, 1994
    Date of Patent: May 11, 1999
    Assignee: AEA Technology PLC
    Inventors: Lionel Houston Ford, John William Stairmand
  • Patent number: 5901770
    Abstract: A flexible cover, which can be rolled onto and about a support rotatable about an axis, and can be unrolled therefrom, consists of at least one translucent sheet having: a continuous outside wall extending throughout the width and throughout the length of the sheet, the length being the dimension which is parallel to the rotational axis of the support and the rolling and unrolling axis of the sheet; a discontinuous inside wall parallel to the outside wall and extending throughout the length and, in a discontinuous interrupted manner, the width of the sheet; and parallel longitudinal walls, extending throughout the length of the sheet, perpendicularly to and connecting the outside and inside walls to define groups of successive longitudinal cells, interruptions of the inside wall defining spaces between respective pairs of adjacent groups of successive cells, the groups being separate and being connected solely by the outside wall which, at the interruptions at the inside wall, constitutes a flexure portion fo
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: May 11, 1999
    Assignee: Charles Belpaume
    Inventors: Charles Belpaume, Michel De Cavel
  • Patent number: 5893416
    Abstract: Corrosion, scale-formation, or other deleterious processes are inhibited in an oil well by installing within the oil well (10) fluid-permeable elements, such as tubular filters (20), which comprises a suppressing material. Each filter (20) comprises two tubular filter screens (24) between which is a bed (26) of particles comprising suitable inhibitor material. The particles might for example be porous ceramic spheres impregnated with the inhibitor material. The inhibitor material gradually dissolves in the well fluids during operation, and may for example inhibit corrosion and/or scale formation.
    Type: Grant
    Filed: November 28, 1997
    Date of Patent: April 13, 1999
    Assignee: AEA Technology plc
    Inventor: Peter Arne Read
  • Patent number: 5890682
    Abstract: With the vehicle anti-collision system of the present invention, road vehicles in the vicinity of a railway crossing are alerted as a train approaches the crossing. A signalling device operating in conjunction with a GPS receiver located in the train emits a signal to a receiver located at the railway crossing to provide an indication of the rail vehicle's location with respect to the railway crossing. The signal is sent continuously at predetermined intervals to provide the railway crossing with sufficient data to estimate the velocity and time of arrival of the train or railway vehicle at the crossing. The railway crossing processes the information and transmits an alarm signal to approaching road vehicles as the rail vehicle approaches the crossing. The signal emitted by the crossing is received at the road vehicle which provides various levels of alarms depending on how close the rail vehicle is to the crossing.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: April 6, 1999
    Assignee: Alternative Safety Technologies
    Inventor: James E. Welk
  • Patent number: 5884942
    Abstract: There is described a security device 10 and a method for verifying the identity of a person making a transaction. The security device 10 comprises a document 12 bearing a picture of the intended user 14 of the security device 10, the picture 14 having been produced by printing of picture 14 by a printer activated by computer memory in which a likeness of the intended user is stored. The devices 10 may be self adhesive for attachment to a second document and be provided in a form comprising a plurality of such devices.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: March 23, 1999
    Inventor: Yogendra K. Raja
  • Patent number: 5878003
    Abstract: A clock, called a "mystery" clock because of its almost totally transparent nature, comprising a transparent dial bearing reference markers (11), a minute indicator, transparent except in the area of a reading pointer (28') and an hour indicator, also transparent except in the area of a reading pointer (26'), indicators and dial having a common geometric axis (Y) and being carried by a frame or surround (20) and at least part of these indicators and dial having teeth at their periphery, masked by the surround (20), for driving them in rotation, in relation to the surround (20), about said axis (Y).
    Type: Grant
    Filed: May 17, 1997
    Date of Patent: March 2, 1999
    Assignee: Van Cleef & Arpels
    Inventor: Gerard Gantet
  • Patent number: 5866909
    Abstract: A mass-analysed ion beam generator in which the ion beam is in the form of a thin flat ribbon with its major transverse dimension aligned parallel with the direction of the mass-analysing magnetic field.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: February 2, 1999
    Assignee: AEA Technology plc
    Inventor: James Harry Freeman
  • Patent number: 5857308
    Abstract: A double lid system is provided with an electric motor (44) to actuate mechanisms to release the lid (20) from a drum (18) and simultaneously clamp the lid (20) to a door (14) of a port (or vice versa), and with an electric motor (74) to withdraw the door (14) from the port to open the port (or to close it). The system is monitored by sensors (60,62,64,82) associated with an electronic logic interlock to ensure the correct sequence of operations of the motors (44,74). The sensors (60,62,64,82) and the motors (44,74) are readily demountable for remote maintenance or replacement. The door-opening motor (74) may he a linear actuator cooperating with a part-helical slot (80) to open the door (14) and then swing it clear of the port.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: January 12, 1999
    Assignee: AEA Technology plc
    Inventors: Timothy John Dismore, Donald John Michael Drew
  • Patent number: 5855776
    Abstract: Apparatus for the on-line treatment of chemical reagents, including a flow line for a reagent flow, a vortex mixer in the flow line for combining and mixing the reagent flow with at least one further reagent flow, a pulser in the flow line for causing the pulsing of the mixed flow from the vortex mixer, and a vessel having an array of vortex cells for receiving the pulsing mixed flow to cause development and growth of precipitate under narrow residence time distribution conditions. Flow lines mix a flow of reagents to initiate precipitation. The pulser pulses the admixed reagents and causes the pulsing mixed flow to swirl with a constantly reversing rotational flow to achieve development and growth of precipitate.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 5, 1999
    Assignee: AEA Technology plc
    Inventors: Michael Joseph Bowe, John William Stairmand
  • Patent number: 5855763
    Abstract: Decomposition of waste and particularly organic waste matter is carried out in an electrochemical cell (11) in which the electrolyte comprises nitric acid containing silver ions as an electrochemically regenerable primary oxidizing species. A separation plant (34) for continuously or periodically withdrawing anolyte is operated to remove or reduce contamination of the anolyte with anions of or containing phosphorus, sulphur, nitrogen or halogens.
    Type: Grant
    Filed: November 5, 1996
    Date of Patent: January 5, 1999
    Assignee: AEA Technology plc
    Inventors: Iain Conlin, Nigel Desmond Evan Warren, David Frame Steele
  • Patent number: 5847494
    Abstract: A corona discharge reactor which has a central electrode in the form of a metal rod with radial projections and a cylindrical outer electrode surrounding the inner electrode.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: December 8, 1998
    Assignee: AEA Technology plc
    Inventors: Keith Howard Bayliss, John Sydney Carlow
  • Patent number: 5844341
    Abstract: An electromagnetic machine which is suitable for use as a direct-drive, directly-coupled, mains electricity generator (14) to be driven by a low speed device such as a wind turbine (18), consists of one or more rotor rings (30) of many permanent magnets (40) of alternating polarity, with coaxial stator rings (28) of many laminated yokes (35), each yoke defining slots to locate coils (38). The yokes (35) and coils (38) form modules which are supported by beams (32) relative to the rotor rings (30). The rotor rings (30) may also be of modular construction. Manufacture and assembly are thereby simplified, and sub-harmonic magnetic flux components are suppressed.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: December 1, 1998
    Assignee: AEA Technology plc
    Inventors: Edward Spooner, Alan Charles Williamson
  • Patent number: 5839475
    Abstract: A method and apparatus for lining a pipe with a polymer liner in which the liner is pulled through a die to reduce the liner's diameter and through the pipe and on removal of the pulling load, allowing the liner to revert to at least the minimum internal diameter of the pipe, wherein the liner has a maximum diameter before entering the die and a minimum diameter in the die. The die having an aperture which is symmetrical with respect to a central, longitudinal axis and comprising in the direction that the liner is passed an entry, a throat and an exit. The diameter of the aperture decreasing over the entry to a minimum to the throat and increasing over the exit. The entry of the die, when viewed in a sectional plane extending longitudinally of the liner and containing the axis, is convex over substantially an entire axial length between where the liner first contacts the die and the throat, wherein the liner substantially continuously engages the die over substantially the entire axial length.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: November 24, 1998
    Assignee: British Gas PLC
    Inventors: Leslie Maine, Kenneth Hicks
  • Patent number: 5836343
    Abstract: An electric pump 13 is mounted on a support 24 and can be raised and lowered using chains 25 driven by a motor.Supply cable 14 for the pump is stored on drum 15. Fluid is discharged by the pump through hose 17 stored on drum 18.A spray ring 20 attached to the pump is supplied with water through hose 21 stored on drum 22. The drums are rotated by hydraulic motors 32 and chains eg 36, 37. As the pump is raised at a uniform speed the drums are rotated to take up the slack hose and cable. The height of the pump is sensed from movement of the pump motor and the pressure supplied to the hydraulic motors is changed in discrete steps to maintain the wind up speed on to the drums despite the change in weight of unwound hose or cable.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: November 17, 1998
    Assignee: British Nuclear Fuels PLC
    Inventor: James Jones