Drilling tool
AssigneeHilti Aktiengesellschaft
InventorElmar Maier
Life of this patent
Estimating the term…
Abstract
A drilling tool is made up of a holder and a drilling member detachably connected together. One of the holder and the drilling member telescopes into the other. Resilient tab-like parts on one of the holder and the drill member engages within recesses in the other for effecting a rotatably locked connection between them. Accordingly, torque can be transmitted through the drilling tool by the tab-like parts and the recesses for effecting a drilling operation. The holder and drilling member can be disconnected without the use of any auxiliary tools.
Claims6
Drilling tool comprising a hollow axially extending cylindrically shaped holder having a first end and a second end and spaced apart in the axial direction, a hollow axially extending cylindrically shaped drilling member having a first end and a second end spaced apart in the axial direction, said drilling member being detachably connected to said holder and one of said holder and drilling member being telescopically engageable within the other, means on one of said holder and drilling member for engagement with receiving means in the other one of said holder and drilling member, wherein the improvement comprises that said means comprises circumferentially and axially extending plate-like wall parts having a first axially extending end connected to the one of said holder and drilling member and a second axially extending free end spaced circumferentially from the first end, and said receiving means comprising recesses in the other one of said holder and drilling member arranged to receive said wall parts and each said recess having an axially extending abutment arranged to be contacted by the second free end of one of said wall parts, said wall parts are resiliently articulated to the one of said holder and drilling member, said free end being radially displaceable relative to the one of said holder and drilling member to which said first end is connected for engagement within one of said recesses, the free ends of said resilient wall parts project from the one of said holder and drilling member transversely of the axial direction, the one of said holder and drilling member containing said wall parts receive the other one of said holder and drilling member therein in a telescoping manner and the free second ends of said wall parts project inwardly from the one of said holder and drilling member, said resilient wall parts are formed as a part of said holder, said recesses are openings formed in said drilling member with said openings being closed on opposite sides extending transversely of the axial direction.
Drilling tool, as set forth in claim 8, wherein said holder has an axially extending threaded connection section at the second end thereof for connection to a drive source for the drilling tool.
Dependencies are inferred from the claim text.