Patents by Inventor Mervyn Evans

Mervyn Evans has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4693240
    Abstract: A bone pin clamp for external fracture fixation apparatus comprises rotation, slide and housing elements (240, 220, 210) nested one within the next, each such element being apertured to receive a pin (100) therethrough, and the rotation and slide elements respectively affording pin adjustment in azimuth and zenith, and in height, relative to the housing element, and a locking mechanism (60, 80, 170) including a common actuator member (60) operable simultaneously to lock the pin and rotation and slide elements in the housing element. In a preferred form the housing element serves as a cylinder with the slide element as a keyed piston therein, and the rotation element is a disc located between a screw (60) and annular thrust members (80, 170) engaged in the piston, the piston and disc being split respectively to lock by expansion and compaction under screw action towards the thrust members.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: September 15, 1987
    Assignee: National Research Development Corporation
    Inventor: Mervyn Evans
  • Patent number: 4570625
    Abstract: A non-rigid bone fracture fixator comprising first and second bone pins for connection either side of a bone fracture and primary and secondary supports clamped to the bone pins by respective fixed and guide clamps. The second support and the guide clamps are connected slidably to the primary support such that the supports may execute a controlled degree of movement with respect to one another. A compression spring is arranged to bias apart the supports longitudinally of a fixated limb. In use the fixator is applied to the limb with the fracture in slight compression. Exercise of the limb then produces varying degrees of fracture compression stimulating bone callus formation and rapid healing. The fixator may include actuating means to provide passive fracture exercise for immobilized patients.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: February 18, 1986
    Assignee: National Research Development Corporation
    Inventors: John D. Harris, Mervyn Evans
  • Patent number: 4502473
    Abstract: A non-rigid bone fracture fixator comprising first and second bone pins for connection either side of a bone fracture and primary and secondary supports clamped to the bone pins by respective fixed and guide clamps. The second support and the guide clamps are connected slidably to the primary support such that the supports may execute a controlled degree of movement with respect to one another. A compression spring is arranged to bias apart the supports longitudinally of a fixated limb. In use the fixator is applied to the limb with the fracture in slight compression. Exercise of the limb then produces varying degrees of fracture compression stimulating bone callus formation and rapid healing. The fixator may include actuating means to provide passive fracture exercise for immobilized patients.
    Type: Grant
    Filed: August 2, 1982
    Date of Patent: March 5, 1985
    Assignee: National Research Development Corp.
    Inventors: John D. Harris, Mervyn Evans
  • Patent number: 4271832
    Abstract: A post-fracture bone immobilization splint for unilateral fixation comprises a rigid bar on which are slidably mounted at least four pin clamps. Each pin clamp is fixable to the bar and is provided with a pin to engage a part of the fractured bone. The pin is supported in two holes diametrically located in a hollow cylindrical portion of the pin clamp, the diameter of the holes being larger than the pin diameter such that the pin can be adjusted slidingly as well as azimuthally within a limited range of zenith angles. The annular gap surrounding the pin is sealed by surrounding moveable washers which are spaced apart within cylindrical portion by a plastic tube through which the pin passes. The remainder of the hollow portion is filled with small ball bearings that are compressible by a threaded plug. The pin is positioned as desired and the threaded plug is then rotated to compress the ball bearings which deform the plastic tube and thereby grip the pin.
    Type: Grant
    Filed: July 20, 1979
    Date of Patent: June 9, 1981
    Assignee: National Research Development Corporation
    Inventors: Mervyn Evans, John D. Harris
  • Patent number: 4130250
    Abstract: A reel for use upon a cylindrical support on plaster jacket bedframes incorates a ratchetless anti-reverse mechanism which is readily disengageable and which permits continuous adjustment of the position of the reel upon the bedframe. The anti-reverse mechanism comprises a close wound helical spring which has a free diameter less than the diameter of the cylindrical support. The spring is mounted on the cylindrical support and attached by one of its ends to a spool rotatably mounted on the cylindrical support.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: December 19, 1978
    Assignee: The Secretary of State for Social Services in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Mervyn Evans, John D. Harris
  • Patent number: 4034075
    Abstract: Compounds of the general formula (I): ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each represents a hydrogen atom, an alkyl group, a nitro group, a halogen atom or a group of the formula --NR.sub.4 R.sub.5 or --OR.sub.4 ; in which the groups R.sub.4 and R.sub.5 may be the same or different and each represent a hydrogen atom, or an alkyl, alkenyl or cycloalkyl group (which alkyl group may optionally be substituted by alkoxy, hydroxy, amino, alkylamino, dialkylamino or aryl groups) or R.sub.4 and R.sub.5 together with the nitrogen atom form a heterocyclic ring which may optionally contain additional hetero atoms, e.g. morpholino or piperazinyl; and R.sub.6 represents a hydrogen atom or an alkyl group.These compounds have biological activity, particularly in inhibiting the release of spasmogenic substances arising as a consequence of antigen-antibody reactions.
    Type: Grant
    Filed: August 15, 1975
    Date of Patent: July 5, 1977
    Assignee: Allen & Hanburys Limited
    Inventors: David Edmund Bays, Mervyn Evan Peel, David Martin Waters, Gwynn Pennant Ellis
  • Patent number: 3984429
    Abstract: Compounds of the general formula: ##SPC1##Wherein X represents a 5-[1H]-tetrazolyl group, R.sub.1 represents a hydrogen atom, a halogen atom, a hydroxyl group or a group --OR.sub.2, (in which R.sub.2 may be a lower alkyl or alkenyl group containing from 1 to 6 carbon atoms optionally substituted by one or more hydroxy groups, an aryl group, an aryloxy group, an alkoxy group or a dialkylamino group) or a group --NR.sub.3 R.sub.4, in which R.sub.3 and R.sub.4 which may be the same or different, represent a hydrogen atom, a lower alkyl group containing from 1 to 6 carbon atoms, optionally substituted by a hydroxy group, or R.sub.3 and R.sub.4 together with the nitrogen atom may form a ring which may optionally be substituted with another heteroatom and pharmaceutically acceptable salts thereof.These compounds have useful immunological activity and inhibit the release of spasmogen mediators.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: October 5, 1976
    Assignee: Allen & Hanburys Limited
    Inventors: Mervyn Evan Peel, Alexander William Oxford
  • Patent number: 3984534
    Abstract: Compounds of the general formula: ##SPC1##Wherein X represents a 5-[1H]-tetrazolyl group, R.sub.1 represents a hydrogen atom, a halogen atom, a hydroxyl group or a group --OR.sub.2, (in which R.sub.2 may be a lower alkyl or alkenyl group containing from 1 to 6 carbon atoms optionally substituted by one or more hydroxy groups, an aryl group, an aryloxy group, an alkoxy group or a dialkylamino group) or a group --NR.sub.3 R.sub.4, in which R.sub.3 and R.sub.4 which may be the same or different, represent a hydrogen atom, a lower alkyl group containing from 1 to 6 carbon atoms, optionally substituted by a hydroxy group, or R.sub.3 and R.sub.4 together with the nitrogen atom may form a ring which may optionally be substituted with another heteroatom and pharmaceutically acceptable salts thereof.These compounds have useful immunological activity and inhibit the release of spasmogen mediators.
    Type: Grant
    Filed: November 29, 1972
    Date of Patent: October 5, 1976
    Assignee: Allen & Hanburys Limited
    Inventors: Mervyn Evan Peel, Alexander William Oxford
  • Patent number: 3979407
    Abstract: The compound 5,5'-[(2-hydroxytrimethylene)dioxy]bis[2(1H-tetrazol-5-yl)chromone] and non-toxic pharmaceutically acceptable salts thereof.This compound inhibits the release of spasmogen from antibody-antigen reactions.
    Type: Grant
    Filed: June 29, 1971
    Date of Patent: September 7, 1976
    Assignee: Allen & Hanburys Limited
    Inventor: Mervyn Evan Peel
  • Patent number: 3971037
    Abstract: A digital data storage element using magnetic bubbles, or small cylindrical magnetic domains formed in a thin film of magnetic material, in which binary information is stored by providing two alternative positions for a magnetic bubble, a pattern of high permeability magnetic material being provided adjacent to the surface of the film to constrain the bubble to lie in any one of the two positions. Information can be transferred from one storage element to another by the mutual repulsion effect of the magnetic bubbles. Shifting registers using two storage elements per bit are described using the mutual repulsion effect of the bubbles to effect data transfer along the register. The use of a small field pulsed with microsecond pulses superimposed on a steady field is described for encouraging the generation of bubbles.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: July 20, 1976
    Assignee: The Post Office
    Inventors: Reginald David Enoch, Mervyn Evan Jones
  • Patent number: 3932416
    Abstract: Compounds of the general formula (I): ##SPC1##in which R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each represents a hdyrogen atom, an alkyl group, a nitro group, a halogen atom or a group of the formula --NR.sub.4 R.sub.5 or --OR.sub.4 ; in which the groups R.sub.4 and R.sub.5 may be the same or different and each represent a hydrogen atom, or an alkyl, alkenyl or cycloalkyl group (which alkyl group may optionally be substituted by alkoxy, hydroxy, amino, alkylamino, dialkylamino or aryl groups) or R.sub.4 and R.sub.5 together with the nitrogen atom form a heterocyclic ring which may optionally contain additional hetero atoms, e.g. morpholino or piperazinyl; and R.sub.6 represents a hydrogen atom or an alkyl group.These compounds have biological activity, particularly in inhibiting the release of spasmogenic substances arising as a consequence of antigen-antibody reactions.
    Type: Grant
    Filed: June 21, 1973
    Date of Patent: January 13, 1976
    Assignee: Allen & Hanburys Limited
    Inventors: David Edmund Bays, Mervyn Evan Peel, David Martin Waters, Gwynn Pennant Ellis