Patents by Inventor Aristovoulos George Petzetakis

Aristovoulos George Petzetakis 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).

  • Apparatus for the production of hollow bodies, especially large-diameter ducts from thermoplastic synthetic resin
    Patent number: 4033808
    Abstract: A system for the production of large-diameter hollow bodies from a thermoplastic synthetic resin in which a synthetic-resin hollow-profile strip is extruded and coiled helically so that adjacent turns of the helix are butt-welded together at least in part with the extrusion heat. The synthetic-resin hollow-profile strip has a generally rectangular external cross-section and a substantially round inner cross-section (of the passage) and a cooling fluid is introduced into this passage upon extrusion, and is circulated through the passage at least over a portion of a turn of the helix.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: July 5, 1977
    Inventor: Aristovoulos George Petzetakis
  • Pipe and tube coupling
    Patent number: 3953057
    Abstract: A pipe and tube coupling arrangement in which two coupling members are provided with transversely interfitting formations resisting axial separation and are thereby brought into axial alignment. A sleeve can then be axially shifted over the joint to prevent transverse separation. The coupling members are provided with annular grooves ehich receive respective sealing glands bearing outwardly upon the sleeve.
    Type: Grant
    Filed: October 9, 1973
    Date of Patent: April 27, 1976
    Inventor: Aristovoulos George Petzetakis