Patents by Inventor C. R. Joelson

C. R. Joelson 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).

  • Method of producing a self aligning pipe with configured joint
    Patent number: 4686756
    Abstract: A method of producing a self aligning concrete pipe with configured joint to improve the seal of the joint cooperatively formed between adjacent concrete pipes wherein each concrete pipe includes a male and female joint member formed on opposite ends thereof to operatively engage the corresponding joint member formed on the next adjacent concrete pipe to form the joint therebetween, the male joint member including a tongue element of predetermined peripheral configuration extending outwardly from the concrete pipe having a resilient seal attached thereto offset inwardly from the outer end thereof, the female joint member including a groove element extending inwardly from the oppostie end of the concrete pipe comprising an initial alignment stage, intermediate alignment stage and final seat recess stage, the initial alignment stage including an axial alignment camming surface of decreasing diameter having a linear dimension equal to or less than the inward offset of the resilient seal from the outer end of the
    Type: Grant
    Filed: January 9, 1986
    Date of Patent: August 18, 1987
    Inventor: C. R. Joelson
  • Self aligning concrete pipe with configured joint
    Patent number: 4565381
    Abstract: A self aligning concrete pipe and method of producing the self aligning concrete pipe to improve the seal of the joint cooperatively formed between adjacent concrete pipes wherein each concrete pipe includes a male and female joint member formed on opposite ends thereof to operatively engage the corresponding joint member formed on the next adjacent concrete pipe to form the joint therebetween, the male joint member including a tongue element of predetermined peripheral configuration extending outwardly from the concrete pipe having a resilient seal attached thereto offset inwardly from the outer end thereof, the female joint member including a groove element extending inwardly from the opposite end of the concrete pipe comprising an initial alignment stage, intermediate alignment stage and final seat recess stage, the initial alignment stage including an axial alignment camming surface of decreasing diameter having a linear dimension equal to or less than the inward offset of the resilient seal from the oute
    Type: Grant
    Filed: April 24, 1984
    Date of Patent: January 21, 1986
    Inventor: C. R. Joelson