Patents by Inventor Ezra Schaffer

Ezra Schaffer 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).

  • Metal duct drive bending tool
    Patent number: 4191043
    Abstract: This disclosure relates to an improved metal duct drive bending tool. The improved metal duct drive bending tool of this disclosure is a portable metal frame type apparatus which uses the pivoting action between two pivotable members of the frame, one of which has teeth, to form a drive at the end of a metal duct that is inserted into a pocket within the frame apparatus between the two pivotable members. The improved metal duct drive bending tool uses the teeth on one of the pivotable members to permit the insertion of various widths of metal duct end portions to be bent.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: March 4, 1980
    Inventor: Ezra Schaffer