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. 30, 2021
Filed:
Apr. 04, 2017
Telesteps Ab, Tranås, SE;
Jens Bernhardsson, Limhamn, SE;
Stina Karlsson, Limhamn, SE;
Henrik Edvardsson, Malmö, SE;
Niklas Ekstrand, Lund, SE;
Carl-Johan Nelson, Bjärred, SE;
Ulrik Gejervall, Forserum, SE;
Telesteps AB, Tranås, SE;
Abstract
A ladder tube () for use in a ladder section of a collapsible ladder () is provided. The collapsible ladder comprises several ladder sections (-), where each ladder section comprises two ladder tubes () arranged parallel to each other and interconnected by a rung () to form the respective ladder section, and where each ladder tube () is telescopically inserted into a ladder tube () of a lower section to form the collapsible ladder (). The ladder tube () is characterized in that it has a cross-sectional shape comprising at least one straight section () which at each end is connected at an angle larger than 90 degrees to at least one additional section () of the cross-sectional shape.