Rock drill
AssigneeHilti Aktiengesellschaft
InventorsWerner Kleine, Hans-Werner Bongers-Ambrosius, Udo Hauptmann, Martin Richter
Life of this patent
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Abstract
A rock drill including a drilling rod (2), a cup-shaped drilling head (5) secured to the drilling rod (2) at one of its ends, and connection elements including at least one radially projecting, entraining web (8) associated with the drilling rod (2) and received in at least one axially extending entrain slot (9) which is formed in an entrain surface of the cup-shaped drilling head (5) for securing the drilling head (5) to the drilling rod (2) for joint rotation therewith and for a limited axial displacement relative thereto.
Claims16
A rock drill, comprising a drilling rod (2);
- a cup-shaped drilling head (5) secured to the drilling rod (2) at one end thereof;
- connection means (6a, 6b) for securing the drilling head (5) to the drilling rod (2) for joint rotation therewith and for a limited axial displacement relative thereto, the connection means including at least one radially projecting, entraining web (8) associated with the one end of the drilling rod (2) and at least one axially extending entrain slot (9) which is formed in an entrain surface of the cup-shaped drilling head (5) and in which the at least one entraining web is received;
- and locking means (7) for releasably connecting the drilling head (5)with the drilling rod (2).
Dependencies are inferred from the claim text.