Patents by Inventor Friedrich Kappel

Friedrich Kappel 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).

  • Lawn mower with vertically adjustable wheels
    Patent number: 4220344
    Abstract: A wheel for a lawn mower, or the like, is positioned on an axle. The axle has a detent groove formed in it. A chassis for the axle has two spaced apart walls with aligned sets of holes into which sets of holes the axle may be selectively inserted to adjust wheel height. A detent spring formed at one of the walls resiliently self-biases to engage in the detent groove in the axle to hold the axle in place. A cutout in that wall holds the detent spring and enables it to resiliently self-bias into the groove in the axle.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: September 2, 1980
    Assignee: Wolf-Gerate GmbH
    Inventor: Friedrich Kappel
  • Device for use with drills or the like for the collection of working debris
    Patent number: 3936213
    Abstract: A collector for use on or in association with drills or other tools which in use produce dust, splinters, powder, chips, shavings or other debris. It comprises a hollow annular housing which can be attached to the working component of the tool in the vicinity of the operating part.
    Type: Grant
    Filed: March 14, 1974
    Date of Patent: February 3, 1976
    Inventor: Friedrich Kappel