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:
Jan. 21, 2003
Filed:
Jul. 27, 1999
Julian A. Imes, Bloomington, MN (US);
Wayne M. Wagner, Apple Valley, MN (US);
John T. Herman, Dellwood, MN (US);
Donaldson Company, Inc., Minneapolis, MN (US);
Abstract
The present disclosure relates to a flexible pipe including a pipe body that extends along a central longitudinal axis. The pipe body is made from a strip that is helically wrapped in a plurality of convolutions. The strip includes inner and outer hook portions that interlock to form an interlock seam between adjacent convolutions. The pipe body includes a mid-portion positioned between first and second end portions. At least the first end portion has an axial length L that traverses at least several of the convolutions of the pipe body. The first end portion is crushed radially inward relative to the mid-portion such that the first end portion has an effective outer diameter D that is smaller than an effective outer diameter D of the mid-portion. A first transition region is positioned between the first end portion and the mid-portion. The first transition region provides a diameter transition between the outer diameter D of the first end portion and the outer diameter D of the mid-portion. The first transition region has an axial length L that traverses at least one of the convolutions of the pipe.