Patents by Inventor Arthur J. Hamerl

Arthur J. Hamerl 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).

  • Patent number: 4657276
    Abstract: A coupling assembly for coupling a tractor to a drawn vehicle or implement comprises a coupling body for attachment to one of a tractor drawbar or trailer tongue, and for engagement with a ball secured to the other of said tractor drawbar or trailer tongue, the body defining ramp means for guiding a ball into a socket forming part of the body, a movable element for locking a ball in said socket, movable second ramp means for guiding a ball out of the socket, and means for operating the movable element and second ramp means between a locking position in which the ball is held in the socket and a release position in which the ball is free to move out of the socket up the second ramp means.
    Type: Grant
    Filed: August 16, 1985
    Date of Patent: April 14, 1987
    Inventor: Arthur J. Hamerl
  • Patent number: 3989276
    Abstract: A mounting plate enables the stand to be mounted to any standard hitch bar. A front leg is pivoted by the upper end thereof to the front of the plate and extends downwardly and rearwardly thereof, terminating in a curved ground engaging skid. Over-center linkage is pivoted between the skid and the mounting plate extending upwardly and rearwardly towards said mounting plate when in the extended position. A lever action makes or breaks the over-center linkage thereby extending or retracting the jack stand.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: November 2, 1976
    Inventor: Arthur J. Hamerl