Drill head

Abstract

A drill head, particularly for a horizontal drilling device, includes a housing and a radar unit disposed within the housing. The radar unit generates electromagnetic waves that exit the housing. The housing of the drill head is made of a dielectric material at least in the region where the electromagnetic waves exit the housing.

1 .- 7 . (canceled) 
     
     
         8 . A drill head, comprising:
 a housing; and   a radar unit arranged within the housing and constructed to produce electromagnetic waves which issue out from the housing,   wherein the housing is made of a dielectric material at least in a region in which the electromagnetic waves issue out therefrom.   
     
     
         9 . The drill head of  claim 8  for application in a horizontal drilling device, 
     
     
         10 . The drill head of  claim 8 , wherein a remainder of the housing is made of a metallic material. 
     
     
         11 . The drill head of  claim 10 , wherein the metallic material is steel. 
     
     
         12 . The drill head of  claim 8 , wherein the region of dielectric material is located in an area of an end face of the drill head. 
     
     
         13 . The drill head of  claim 8 , wherein the dielectric material is a ceramic material. 
     
     
         14 . The drill head of  claim 8 , wherein the ceramic material includes an oxide ceramics. 
     
     
         15 . The drill head of  claim 8 , further comprising a plate of dielectric material connected to the housing for covering an opening in the region of the housing. 
     
     
         16 . The drill head of  claim 15 , wherein the plate is constructed for detachable connection with the housing. 
     
     
         17 . The drill head of  claim 15 , wherein the plate is arranged in a depression of the housing so that an outer surface of the plate is flush or recessed in relation with a surface of the housing.