Patents by Inventor Douglas A. Holman

Douglas A. Holman 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 to lock and unlock scaffold casters
    Patent number: 6871892
    Abstract: An apparatus used as a tool, to lock and unlock the casters of a scaffold while the user is on top of a scaffold. The apparatus is an elongated pole and adjustable sleeve with a spring-loaded push button mechanism, to change the length of the apparatus. There are a variety of specially designed heads that are used to adjust the scaffold caster levers in locked and unlocked positions. This is done in place of a user climbing up and down the scaffold and manually locking and unlocking the scaffold caster levers from the ground level. A rubber mallet head or contact bulb is provided near the handle to further adjust the scaffold casters, and a looped strap is also provided to hang the apparatus when not in use.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: March 29, 2005
    Inventor: Douglas A. Holman
  • Apparatus to lock and unlock scaffold casters
    Publication number: 20030006620
    Abstract: An apparatus used as a tool, to lock and unlock the casters of a scaffold while the user is on top of a scaffold. The apparatus is an elongated pole and adjustable sleeve with a spring-loaded push button mechanism, to change the length of the apparatus. There are a variety of specially designed heads that are used to adjust the scaffold caster levers in locked and unlocked positions. This is done in place of a user climbing up and down the scaffold and manually locking and unlocking the scaffold caster levers from the ground level. A rubber mallet head or contact bulb is provided near the handle to further adjust the scaffold casters, and a looped strap is also provided to hang the apparatus when not in use.
    Type: Application
    Filed: March 20, 2002
    Publication date: January 9, 2003
    Inventor: Douglas A. Holman