Patents by Inventor Joseph Zwaans

Joseph Zwaans 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).

  • Overload-security for staking machines for leather industry
    Patent number: 4546626
    Abstract: An overload security system for a leather staking machine is disclosed. The system employs a disk spring package in order to release the staking plates from their predetermined positions when a certain critical pressure is exceeded. The position of the staking plates is adjustable for different qualities of leather or different intensities of staking.
    Type: Grant
    Filed: May 25, 1982
    Date of Patent: October 15, 1985
    Inventor: Joseph Zwaans