Patents by Inventor Antonio Maldarella, Jr.

Antonio Maldarella, Jr. 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).

  • Sealing ring for spigot and socket pipe joint
    Patent number: 4315630
    Abstract: Joints for thermoplastic pipe. The necessity of providing a sealing ring between the socket and spigot of such a joint results in forming a ring groove in the socket and affixing the sealing ring within this ring groove. The present invention contemplates forming a sealing ring groove 6 so configured around a sealing ring 11 with a substantially axially incompressible portion 12 to lock the sealing ring in place and also to enhance the ease of assembly and ability of the thus assembled joint to structurally withstand elevated hydrostatic pressures. Also disclosed is an apparatus 20 and 44 for forming the preferred socket configuration.
    Type: Grant
    Filed: May 30, 1980
    Date of Patent: February 16, 1982
    Assignee: Johns-Manville Corporation
    Inventors: David W. French, Robert W. Heisler, Antonio Maldarella, Jr., Gilbert W. Vanhoy