Patents by Inventor John Lenz

John Lenz 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: 4189137
    Abstract: A vacuum pickup device which includes:(1) a tubular outer member having one of its ends open and one of its ends sealed and having one or more ports, between its ends, that provide communication between its interior and exterior and that are in communication with a source of vacuum;(2) a tubular inner member, positioned within the outer member and extending outwardly of the outer member through its open end; the inner member having one or more ports, between its ends, that provide communication between its interior and exterior; the inner member also being adapted to move through the open end of the outer member, between an extended position, in which an open end of the inner member extends a predetermined maximum distance outwardly of the open end of the outer member, and a retracted position, in which the open end of the inner member extends less than the predetermined maximum distance outwardly of the open end of the outer member; and(3) a spring, adapted to urge the inner member from its retracted positio
    Type: Grant
    Filed: April 14, 1978
    Date of Patent: February 19, 1980
    Assignee: The McCall Pattern Company
    Inventors: General C. Denney, John Lenz, Joseph M. Williams
  • Patent number: 3988947
    Abstract: A flywheel for use with tools such as punch presses and the like which includes a substantially flat mounting plate with means for mounting the plate to the machine upon which the wheel will be used and providing the flat plate with a strip of material about the periphery thereof which material strip is formed from coiling or winding strip stock to the proper dimension for attachment to the periphery of the wheel through welding or the like.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: November 2, 1976
    Assignee: Havir Manufacturing Company
    Inventor: John Lenz