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Class Information
Number: 175/295
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > With noncutting portion forwardly of sleeve impact member having a cutting portion (e.g., reamer)
Description: Apparatus in which the hammer or impact device comprises an outer sleeve provided with cutting edges and mounted for longitudinal sliding movement on a shaft, said shaft having a portion extending forwardly of said sleeve which has a noncutting function.

Patents under this class:

Patent Number Title Of Patent Date Issued
8657038 Expandable reamer apparatus including stabilizers Feb. 25, 2014
8439135 Down-the-hole drill hammer having an extendable drill bit assembly May. 14, 2013
8381843 Well bore reamer Feb. 26, 2013
8297381 Stabilizer subs for use with expandable reamer apparatus, expandable reamer apparatus including stabilizer subs and related methods Oct. 30, 2012
7168509 Percussive reamer and method of use thereof Jan. 30, 2007
6283229 Impact device for directional boring Sep. 4, 2001
5339909 Apparatus for making earth bores Aug. 23, 1994
5127481 Percussion boring machine for destructive replacement of buried pipelines Jul. 7, 1992
4858703 Self-propelled subsoil penetrating tool system Aug. 22, 1989
4732222 Ram boring machine with impact blade piston Mar. 22, 1988

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