Patents Assigned to Akron Rubber Development Laboratory, Inc.
  • Double walled structural reinforcement
    Patent number: 7939158
    Abstract: A double walled reinforcement structure and method for making a double walled reinforcement structure having a plurality of longitudinally extending and nested structural members. Each structural member comprises a first cell having a first cross-section and a second cell having a second cross-section. The second cell is positioned within the first cell and the second cell contacts the first cell in a plurality of locations to provide mutual support of the cells in a manner increasing the tensile and compressive strength of the structure.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: May 10, 2011
    Assignee: Akron Rubber Development Laboratory, Inc.
    Inventor: Uday Prakash Karmarkar
  • Apparatus and method for predicting tire life relative to belt-leaves-belt failures
    Patent number: 7249497
    Abstract: A test fixture, test apparatus, and test method utilize a radially cut tire section that is mounted and sealed to a test jig in a airtight manner such that an air chamber is formed between an innerliner surface of the radial tire section and a recessed portion of the jig body such that the tire section may be pressurized on the test jig. A test surface is provided and either the test surface or the test jig is moveable relative to the other to the other to provide a dynamic load to the radial tire sections.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: July 31, 2007
    Assignee: Akron Rubber Development Laboratory, Inc.
    Inventors: C. Robert Samples, Blake E. Matthies, Walter B. Samples, Uday Prakash Karmarker
  • Double walled structural reinforcement
    Patent number: 7208063
    Abstract: A double walled reinforcement structure and method for making a double walled reinforcement structure having a plurality of longitudinally extending and nested structural members. Each structural member comprises a first cell having a first cross-section and a second cell having a second cross-section. The second cell is positioned within the first cell and the second cell contacts the first cell in a plurality of locations to provide mutual support of the cells in a manner increasing the tensile and compressive strength of the structure.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: April 24, 2007
    Assignee: Akron Rubber Development Laboratory, Inc.
    Inventors: Uday Prakash Karmarkar, Hisham Tawfig Mohamed
  • Double walled structural reinforcement
    Publication number: 20040031235
    Abstract: A double walled reinforcement structure and method for making a double walled reinforcement structure having a plurality of longitudinally extending and nested structural members. Each structural member comprises a first cell having a first cross-section and a second cell having a second cross-section. The second cell is positioned within the first cell and the second cell contacts the first cell in a plurality of locations to provide mutual support of the cells in a manner increasing the tensile and compressive strength of the structure.
    Type: Application
    Filed: August 13, 2003
    Publication date: February 19, 2004
    Applicant: Akron Rubber Development Laboratory, Inc.
    Inventors: Uday Prakash Karmarkar, Hisham Tawfig Mohamed
  • Expanding seal
    Publication number: 20030153390
    Abstract: A seal for a mass transit power transmission coupling. The seal is made at least partially of a polymeric material and configured such that the sealing surface moves radially outward under the centrifugal force created by rotation of the coupling beyond a predetermined speed. When the rotational speed of the coupling drops below the predetermined speed, the sealing surface moves radially inward and seals the coupling to prevent loss of the oil lubrication typically used on such couplings.
    Type: Application
    Filed: February 12, 2003
    Publication date: August 14, 2003
    Applicant: Akron Rubber Development Laboratory, Inc.
    Inventor: C. Robert Samples