John G Swenson

US Patent:

40649024, Dec 27, 1977

Filed:

Jun 30, 1976

Appl. No.:

5/701288

Inventors:

John Gordon Swenson - Erie PA

International Classification:

F16L 500

US Classification:

137370

Abstract:

A curb box having a cast base housing slidably receiving a threaded pipe which is distorted to oval shape above the threaded end and a riser having a threaded upper end and outwardly-extending ears in the lower end non-rotatably received in the oval part of the threaded upper part of the threaded pipe whereby the riser pipe can be telescopically moved vertically and have a threaded cap supported on the upper end thereof. Curb boxes of the type of the present invention have notably been made with base housing and the pipe extending upwardly therefrom cast in one piece and a riser pipe slidably received in the one-piece base. Applicant has discovered that by threading the base housing and connecting a threaded pipe to it and distorting the threaded pipe to oval shape so that a vertically-extending pipe can be slidably but non-rotatably received therein, the said curb box can be made much simpler and at lower cost.