Patents by Inventor Andrew Harold Johnson

Andrew Harold Johnson 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).

  • Air spring actuator weight transfer apparatus
    Patent number: 6792704
    Abstract: This invention relates to using the expansion force of an air spring, coupled between a snowplow vehicle and the attached snowplow, so that contact between ground engaging components of the snowplow and the road can be controlled, either automatically or manually. The air spring is held in alignment as it expands longitudinally, by an apparatus using guides and struts. Longitudinal alignment is important, as bending of the air spring causes loss of force. Attachment points of the apparatus are drawn together, as the air spring expands. The longitudinal expansion force of the air spring can be transmitted directly to a chain or cable.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: September 21, 2004
    Inventor: Andrew Harold Johnson
  • Air spring actuator weight transfer apparatus
    Publication number: 20030101626
    Abstract: This invention relates to using the expansion force of an air spring, coupled between a snowplow vehicle and the attached snowplow, so that contact between ground engaging components of the snowplow and the road can be controlled, either automatically or manually. The air spring is held in alignment as it expands longitudinally, by an apparatus using guides and struts. Longitudinal alignment is important, as bending of the air spring causes loss of force. Attachment points of the apparatus are drawn together, as the air spring expands. The longitudinal expansion force of the air spring can be transmitted directly to a chain or cable.
    Type: Application
    Filed: November 14, 2002
    Publication date: June 5, 2003
    Inventor: Andrew Harold Johnson