Patents by Inventor Ray Lotfi

Ray Lotfi 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: 6086297
    Abstract: Equipment for machining a bell portion of plastic pipe. The equipment includes a device for clamping the pipe against movement, at least one rotary cutter for cutting at least one groove in the bell portion, and mechanisms for causing at least one rotary cutter to traverse the interior wall of the bell portion. The machining equipment further includes a drill for drilling a hole through the wall of the bell portion substantially tangentially to one of the annular grooves for receiving a flexible spline to interconnect the pipe with a correspondingly grooved second pipe to form a bell and spigot pipe connection.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: July 11, 2000
    Assignee: CertainTeed Corporation
    Inventor: Ray Lotfi