Patent ID: 7309199
Filing Date: 2007-12-18
Classification: C04B,E04B,F16B,Y10S

Abstract:
1. A sprue dowel, comprising a radially projecting, embeddable portion ( 12 ); an attachment portion ( 21 ) formed as a hollow cylindrical shaft ( 24 ) extending from said embeddable portion; a plurality of spaced from each other, furrowed retaining projections ( 26 , 27 ) provided on an outer circumference of the shaft ( 24 ) and extending parallel to a longitudinal axis ( 25 ) of the sprue dowel ( 11 ), and helically extending guide elements ( 29 ) provided on the outer surface of the shaft ( 24 ); and at least one bore ( 42 ) formed in said hollow cylindrical shaft ( 24 ) in a direction traversing said longitudinal axis ( 25 ) and in a region of a free end ( 22 ) of the attachment portion ( 21 ).