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1. 发明专利

GB190908757A Apparatus for Cutting Roadbeds. 未知
公开(公告)号：GB190908757A
公开(公告)日：1909-12-31
申请号：GB190908757D
申请日：1909-04-13
申请人： CRAIG LEE DARNEAL
发明人： CRAIG LEE DARNEAL
IPC分类号： E01C23/09
摘要： 8757. Craig, L. D. April 13. Scarifiers or road-breakers. - Relates to machines for breaking up asphalt and other roads, and for digging trenches for laying pipes or conduits, by means of vertically falling cutting - tools, and consists in providing a wheeled truck 1 carrying hoisting - drums 3 for two cutters 11 which are attached to hammers 10 enclosed in laterally adjustable frames 5. To prevent disturbance of the adjacent road surface, pressure plates 15 are arranged to bear on the road at each side of the cutters. Cables 12, attached to the hammers 10, pass over pulleys 13, and are wound on the drums 3, which are loosely mounted on the shaft 3 driven from the engine 4, but are thrown into engagement for raising the hammers by a clutch lever 14. The frames 5 are laterally adjustable between crossbeams 6 by a right and left handed screw-bolt 8. The plates 15 are connected to vertically-guided lift-rods 16', operated from levers 19 adjustable on quadrants 20. The plates are held down by springs 18.

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