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:
Feb. 07, 1984
Filed:
Sep. 23, 1982
Richard D Beck, Salem, OR (US);
Campbell H Steketee, Jr, Salem, OR (US);
Other;
Abstract
An elongated, flexible body member has leading and trailing end portions and is expandable by air pressure. The body member includes conduits and fittings for allowing such expansion and also has conduits and fittings capable of air testing an area of pipe sealed off by ends of the body member and also capable of discharging grout in such sealed off area. An expandable propelling head is connected to the body member by a fluid operated double acting cylinder whereby upon selected inflation and deflation of the head and operation of the cylinder the body member can be propelled in a pipe. The connection between the propelling head and the body member is flexible to allow the assembly to negotiate bends in a pipe. The body member includes a mixing chamber for mixing a grout and a catalyst therefor prior to discharge into the pipe.