Patents by Inventor Randall Parrish

Randall Parrish 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).

  • Apparatus for testing aramid fiber elevator cables
    Patent number: 6923065
    Abstract: An apparatus and method for inspecting and calculating the residual strength of an aramid fiber rope driving an elevator to determine when such rope is in need of replacement. The apparatus comprises a transmitter for introducing an acoustic wave that will travel along the aramid fiber rope and a plurality of receivers for receiving the acoustic wave after its has traversed a designated section of the rope. The transmitter and receiver provide signals indicating the times the wave was sent by the transmitter and thereafter received by the receiver. From these signals, a program calculates the wave velocity, and the modulus and residual strength of the aramid rope.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: August 2, 2005
    Assignee: Thyssen Elevator Capital Corp.
    Inventors: Rory Smith, Robert H. Sweet, James Nickerson, Michael A. Palazzola, Randall Parrish
  • Apparatus for testing aramid fiber elevator cables
    Publication number: 20040099062
    Abstract: An apparatus and method for inspecting and calculating the residual strength of an aramid fiber rope driving an elevator to determine when such rope is in need of replacement. The apparatus comprises a transmitter for introducing an acoustic wave that will travel along the aramid fiber rope and a plurality of receivers for receiving the acoustic wave after its has traversed a designated section of the rope. The transmitter and receiver provide signals indicating the times the wave was sent by the transmitter and thereafter received by the receiver. From these signals, a program calculates the wave velocity, and the modulus and residual strength of the aramid rope.
    Type: Application
    Filed: September 12, 2003
    Publication date: May 27, 2004
    Inventors: Rory Smith, Robert H. Sweet, James Nickerson, Michael A. Palazzola, Randall Parrish