Patents by Inventor Stanton D. Needles

Stanton D. Needles 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).

  • Scraper elevator power chain tensioning device
    Patent number: 3946619
    Abstract: A chain tensioning device, especially for scraper elevators, in which the distance between the head and foot shafts of the elevator is power adjusted to obtain the proper chain tension. A pressure source delivering a relatively constant supply of low pressure hydraulic fluid, such as the charging circuit of a hydrostatic elevator drive, is used to static load a cylinder against the desired catenary loading under idle conditions to retension the chains.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: March 30, 1976
    Assignee: Clark Equipment Company
    Inventors: Stanton D. Needles, Allan R. Swanson