| 摘要 |
890,448. Invalid chairs. WORKACHAIR ENTERPRISES Ltd. April 6, 1960 [Jan. 6, 1959], No. 514/59. Class 108(1): [Also in Group XIV] An invalid chair has a lower part made from tubular member l 1 -l 6 supported on wheels 5, 7, and an upper part made from members u 1 -u 6 the relatively telescoping parts a 1 , a 2 . b 1 , b 2 allowing the upper part carrying the seat to be raised and lowered by means of the hydraulic or other jack 1 supplied by pressure fluid from the pump 2 via the valve 4. |
