| 摘要 |
753,894. Collapsible wheel chairs. LEHR, A. W. April 5, 1954 [April 7, 1953], No. 9857/54. Class 108 (1). A wheel-chair has a central longitudinal member 6 to which are pivotally attached members 4 and 5 which form with the members 1 collapsible parallelograms to support the road wheels. Collapsing is effected by movement of the sleeve 7 along the member 6 and by folding the back rest 11 down between the wheels after the stay 15 has been released. |
