Patents by Inventor Clifford A. Padgett

Clifford A. Padgett 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 and apparatus for cement lining of pipes
    Patent number: 4252763
    Abstract: A pipe lining apparatus includes a distributor head which throws cement mortar centrifugally against the interior of a pipe, a trowel which smooths the cement mortar and a liquid coating spray applicator which applies a curing control substance to the trowelled lining. The spray applicator comprises an air atomizing device which produces a very fine coating spray and blows it onto the freshly applied mortar lining without disturbing the lining. Also, in one embodiment the coating spray application is mounted to swing laterally with the trowel so as to be maintained centrally in the pipe.
    Type: Grant
    Filed: June 6, 1978
    Date of Patent: February 24, 1981
    Assignee: Raymond International Builders, Inc.
    Inventor: Clifford A. Padgett