Patents by Inventor Ronald Frederick Carlson

Ronald Frederick Carlson 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).

  • Retractable cargo bed
    Patent number: 6659524
    Abstract: A retractable cargo bed includes a stationary frame adapted for mounting onto a deck of a truck and a travelling frame movable relative to the stationary frame between a retracted position and an extended position. A locking mechanism is provided which includes stop members secured to the bottom of the stationary frame at spaced intervals. A locking lever is carried by the travelling frame which is pivotally mounted for movement about an axis which is parallel to a longitudinal axis of the travelling frame between a downwardly angled locking position and a substantially horizontal release position. The locking lever is biased into the locking position. A release lever is provided for manually moving the locking lever to the release position.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: December 9, 2003
    Inventor: Ronald Frederick Carlson
  • Ultrasonic absorption refrigeration
    Publication number: 20020100292
    Abstract: A refrigeration process, employing conventional lithium bromide absorption refrigeration, the energy input of which is derived from conventional ultrasonic humidifier devices.
    Type: Application
    Filed: January 30, 2001
    Publication date: August 1, 2002
    Inventor: Ronald Frederick Carlson