The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2013
Filed:
Jan. 10, 2013
Ming C. Kuo, Cerritos, CA (US);
Ming C. Kuo, Cerritos, CA (US);
Other;
Abstract
A pre-stressed concrete pipe is taught that incorporates a cylinder (), an annular ring () and an annular offset member () welded together. A seal band () stretches over the annular offset member and the assembled annular ring is welded within a first end () of the metallic cylinder. A strip of pressure sensitive tape () seals the internal interface. An O-ring () is positioned around the annular ring during joint attachment of a pipeline. The cylinder second end () utilizes a hat member () and a resilient seal band () stretched over the hat member with the assembled hat member welded within the second end of the cylinder. A strip of pressure sensitive tape () seals this interface. A film layer of release agent () is adhered to the inside of the metallic cylinder where a concrete tube () is cast within the cylinder. A pressurized solidifying compound () is disposed through annular spaces created between the cylinder inner wall and the offset member and hat member formed between the cylinder and the concrete tube permitting the concrete tube to remain constantly in a tangential compressed state.