Patent ID: 7284932
Filing Date: 2007-10-23
Classification: E21D

Abstract:
1. Apparatus for pressing out a mass ( 22 ) from an axially extending self-drilling chemical composition anchor ( 2 ) for use in a construction field such as for mining and tunnel construction, comprising an axially extending outer housing ( 21 ) with an axially extending pressing device ( 24 ) within said housing ( 21 ), said composite anchor ( 2 ) comprises an axially extending anchor tube ( 5 ) having a leading end ( 6 ) with a drilling head ( 7 ) and a trailing end ( 8 ) within said outer housing ( 21 ) and arranged to be driven into a receiving material by a motor ( 3 ), said anchor tube ( 5 ) has a receptacle ( 31 ) therein for the mass ( 32 ) to be pressed out from the anchor tube ( 5 ), a piston ( 33 ) within said anchor tube ( 5 ) for pressing out the mass ( 32 ) from the receptacle ( 31 ), and the apparatus ( 4 ) for pressing out the mass ( 22 ) is operatively coupled with said motor ( 3 ) and said trailing end ( 8 ) of said anchor tube ( 5 ), whereby said pressing device ( 24 ) is actuated by a fluid medium and said pressing device ( 24 ) has an inlet opening ( 36 ), an intermediate channel ( 37 ) and an outlet opening ( 38 ) for the fluid medium, and said pressing device ( 24 ) comprises a removal channel for removal of drillings generated during the drilling operation of said composite anchor ( 2 ).