| 摘要 |
1,261,489. Back-rests. EVERTAUT Ltd. Dec.4, 1970, No. 57652/70. Addition to 1,139,173. Heading A4J. The back-rest adjustment arrangement of the parent Specification is modified to allow resilientlyresisted backward movement of the back-rest about its pivot, by providing a rubber cushion surrounding the adjusting screw between an abutment on the screw and the bracket on the seat which it engages. |
