| 摘要 |
1,119,139. Woodworking. BELOIT CORP. 20 June, 1967 [22 July, 1966], No. 28336/67. Addition to 1,078,446. Heading B5L. A wood chipper comprises a rotary disc 14 having angularly-spaced knives 16 and angularly-spaced passageways 17 therethrough, means 22 to feed wood to one side of the disc for cutting into chips which pass through the passageways, a circular housing 18 surrounding the other side of the disc, angularly-spaced blades 24 carried by the said other side of the disc, an annular plate 29 mounted on the blades 24, an involute housing 33 surrounding the opposite side of the annular plate, other angularly-spaced blades 37 carried by the annular plate for rotation within the involute housing, a tangential outlet 31 for the circular housing, a circumferential outlet for the involute housing, both outlets communicating with a discharge conduit 32. The disc 14 is mounted in a shaft 11 driven by a power unit and with the knives 16 and blades 24 is disposed within the circular housing 18. The annular plate 29 mounted on the blades 24 is a close fit within the circular housing so that chips cut by the knives 16 and passing through the passageways 17 in disc 14 are confined to passing through the tangential outlet 31 to the discharge conduit 32. The passage of chips along the conduit is assisted by air which is drawn through an opening 41 into the involute housing 33 by the blades 37 mounted on plate 29 and passes through the circumferential opening into the discharge conduit. |
