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:
Mar. 10, 1987
Filed:
May. 03, 1985
Kenneth M Knapp, Houston, TX (US);
Other;
Abstract
A method and apparatus for installing optical fibers on a leader in plastic pipe are disclosed. In the preferred and illustrated embodiment for one type of plastic pipe having transverse corrugations, a pig is set forth which has a eyelet for connection with a towed leader, the eyelet being anchored at the nose. The pig body is constructed so that the nose is deformed as loading increases with length of leader, thereby swelling. This reduces blow-by and increases thrust force acting on the pig to overcome the increase in drag with leader length. An alternate embodiment shows an outer layer incorporating graphite or Teflon.RTM. particles in the outer layer to reduce friction. The pigs of this disclosure are adapted to be used in procedures involving corrugated plastic pipe and also plastic pipe having a smooth wall and spaced welded internal beads.