| 摘要 |
<p>991,329. Sawing. A. STIHL, [trading as ANDREAS STIHL MASCHINENFABRIK]. Feb. 10, 1964 [March 29, 1963], No. 5444/64. Heading B5L. A saw chain comprises first and second groups 3 of serially-arranged connecting members provided one on each side of serially-arranged chip-removing members 1 having passage means 6, 6<SP>1</SP> for conveying lubricating oil, each of said first and second groups including cutting tooth members 2, 2<SP>1</SP> offset with regard to the cutting tooth members of the other group. The chip-removing members 1 are centrally arranged and have extensions 1<SP>1</SP> for extending into the guiding groove 5<SP>1</SP> of a guide rail 5. The members are connected by pivot pins 4 to the connecting members 3 and tooth members 2, 2<SP>1</SP> which have surfaces 2u, 3u for sliding engagement with the shoulders of the guide rail. Each extension has a concave leading edge 8 which is associated with a groove 6, 6<SP>1</SP> on each side of the extension so that, during advancing movement of the chain, oil supplied to the guide groove through a bore 11 is trapped by the concave edge 8 and fed along the passages 6, 6<SP>1</SP> to lubricate the sides of the extensions. The passages terminate in the vicinity of pivot holes 10 so that oil is supplied to the pivot and also to the sliding surfaces 2u, 3u.</p> |
