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. 19, 2019
Filed:
Jun. 15, 2017
Permobil Ab, Timrå, SE;
Anton Danielsson, Sundsvall, SE;
Herbert Van de Wal, Alnö, SE;
PERMOBIL AB, , SE;
Abstract
The present disclosure relates to a swing arm linkage () for a mid-wheel drive wheelchair, comprising: a first swing arm () having a first swing arm pivot point () and a linkage member first mounting point (), a second swing arm () having a second swing arm pivot point () and a linkage member second mounting point (), a linkage member () configured to be connected to the linkage member first mounting point () and to the linkage member second mounting point (), to enable force transfer between the second swing arm () and the first swing arm (), wherein the linkage member () has an elongated shape defining a linkage axis (A) extending between the linkage member first mounting point () and the linkage member second mounting point (), a first straight line being formed between the first swing arm pivot point () and the linkage member first mounting point (), and a second straight line being formed between the second swing arm pivot point () and the linkage member second mounting point (), wherein the linkage member first mounting point () and the linkage member second mounting point () are so arranged relative to each other that the sum of an angle α between the linkage axis and a line perpendicular to the first straight line and extending from the linkage member first mounting point and an angle β between the linkage axis and a line perpendicular to the second straight line and extending from the linkage member second mounting point is constant or increasing with increasing ditch angle.