| 摘要 |
1,133,568. Vehicle rest bars. ROYAL INDUSTRIES Inc. 8 Dec., 1966 [7 March, 1966], No. 54936/66. Heading B7J. [Also in Divisions F1 and F2] The delivery pipe 18 from a concrete or like pump 10 is connected to a conduit 30b forming part of a boom comprising sections 30 connected together. The boom may be raised and lowered and angularly adjusted by hydraulic means. As shown the pump and boom are mounted on a motor vehicle which has detachable hydraulic supporting struts 21. The first section 30 is permanently mounted on the vehicle and its conduit 30b may be bushed if subsequent conduit sections are of reduced diameter.
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