Patents by Inventor Anthony Maddison

Anthony Maddison 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).

  • Stress testing apparatus
    Patent number: 6453750
    Abstract: A stress testing apparatus includes a cylinder block 2 with twelve cylinders 4, each housing a piston 14. Hydraulic pressure is provided to each of the cylinders 4 by a common supply bore 6 for urging each piston 14 out of its respective cylinder 4. A stress testing device 16 is mounted over each cylinder 4 and piston 14. For tensile testing (see FIG. 3) of a specimen (X), a piston (14a) acts on the housing (28a) of the device (16a) through pins (26), to push the housing (28a) away from the cylinder block 2. The specimen X is mounted between the housing (28a) and the cylinder block 2. For compressive testing (see FIG. 4), of a specimen Y the housing (28b) is rigidly secured to the cylinder block 2, and the cylinder (14b) acts to compress the specimen Y between the housing (28b) and the cylinder block 2 through a shaft (22b).
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: September 24, 2002
    Inventor: Anthony Maddison
  • Stressing device
    Patent number: 5388464
    Abstract: The device comprises a tubular body portion (1) in which are fitted first and second jaws (2, 4) for holding a specimen (3) to be tested. A compression spring (5) or pressure chamber (29), are housed within the body portion (1) and act to urge the first jaw (2) outwards whilst the second jaw (4) is secured to the body portion thereby applying stress to the specimen (3). The device is sufficiently small to enable it to be used in confined spaces, such as the underside of a vehicle or within a vehicle engine compartment, so the tests can be carried out in real-life environments. If hydraulic actuation of the pressure chamber (29) is used, varying stresses can be applied to the specimen (3) which are also dependent upon real-life movements and/or stresses.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: February 14, 1995
    Inventor: Anthony Maddison
  • Structures fabricated from aluminium components and processes involved in making these structures
    Patent number: 5139888
    Abstract: A process for forming a structure of aluminium components comprises pre-treating aluminium sheet to produce an inorganic non-metallic surface coating thereon, forming the pre-treated sheet to produce components of desired shape and applying adhesive to the components and securing them together by means of the adhesive. Generally, an adhesive-compatible press lubricant is present on the sheet when it is formed. The invention also includes aluminium sheet carrying the inorganic non-metallic surface coating and a press lubricant thereon.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: August 18, 1992
    Assignees: Alcan International Limited, BL Technology Limited
    Inventors: Patrick G. Selwood, Anthony Maddison, Peter G. Sheasby