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:
May. 07, 2002
Filed:
Apr. 20, 2000
Sergei Filippovitch, Thornhill, CA;
Jukka Maki, Helsinki, FI;
PII Pipetronix GmbH, Stutensee, DE;
Abstract
A device for moving a pig through a conduit, such as a pipeline, is proposed, comprising at least one pulling element with at least one sealing means. The sealing means comprises a supporting structure with variable circumference with at least one sealing element disposed on the circumference of the supporting structure. In a preferred embodiment, the supporting structure comprises supporting arms disposed substantially radially and being pivotable about axes, each perpendicular to the longitudinal central axis of the pulling element, and is mounted to the pulling element via the supporting structure and a central sleeve which can be fixed to the pulling element.