Swing arm linkage for a mid-wheel drive wheelchair

US10206832B2 · kind B2 · utility

Assignee

• PERMOBIL AB · SE

Inventors

• Anton Danielsson · Sundsvall, SE
• Herbert Van de Wal · Flen, SE

Key dates

• Filing date: Jun 15, 2017
• Grant date: Feb 19, 2019
• Expiry date: Aug 26, 2037

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61G5/1089
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The present disclosure relates to a swing arm linkage (1) for a mid-wheel drive wheelchair, comprising: a first swing arm (3) having a first swing arm pivot point (3a) and a linkage member first mounting point (3b), a second swing arm (5) having a second swing arm pivot point (5a) and a linkage member second mounting point (5b), a linkage member (7) configured to be connected to the linkage member first mounting point (3b) and to the linkage member second mounting point (5b), to enable force transfer between the second swing arm (5) and the first swing arm (3), wherein the linkage member (7) has an elongated shape defining a linkage axis (A) extending between the linkage member first mounting point (3b) and the linkage member second mounting point (5b), a first straight line being formed between the first swing arm pivot point (3a) and the linkage member first mounting point (3b), and a second straight line being formed between the second swing arm pivot point (5a) and the linkage member second mounting point (5b), wherein the linkage member first mounting point (3b) and the linkage member second mounting point (5b) are so arranged relative to each other that the sum of an angle α …