| 摘要 |
<p>1281114 Milling cutters S P V PIATTI 10 March 1970 [10 March 1969] 11486/70 Heading B3K [Also in Division F1] Side-by-side elongated combustion chamber cavities are formed in an I.C. engine cylinder head by rotary cutters. A plurality of pairs of cutters, Fig. 5, mounted on a common shaft, may form the combustion chambers of a plurality of engine cylinders by moving the cutters into engagement with the head and then withdrawing the cutters. The cutters may be moved in the direction of the longitudinal axes of the cavities between the engagement and withdrawal movements, Fig. 9 (not shown), or movement in the longitudinal direction may take place between cutter movements to form the longitudinal ends of the cavities, Fig. 10 (not shown).</p> |
