Boring or penetrating the earth – Boring without earth removal
Patent
1991-02-22
1992-06-09
Neuder, William P.
Boring or penetrating the earth
Boring without earth removal
175 21, E21B 726
Patent
active
051198894
ABSTRACT:
An apparatus for creating or reaming underground tunnels or conduits for the laying of cable or the like, comprising a bit head having a contoured outer surface adapted to bore through dirt or wood, a rigid core shaft, and a generally cylindrical hollow outer shell having a shell diameter comprising at least one circumferential shoulder having a ridge diameter greater than said shell diameter, said shoulder being located a certain distance along the length of said outer shell; wherein said bit head is releasably secured to and is coaxial with said core shaft, said core shaft is located substantially within the hollow central portion of said outer shell, and said outer shell has a length substantially equal to the length of said core shaft such that said bit head is located outside of said outer shell.
REFERENCES:
patent: 334919 (1886-01-01), Wickizer
patent: 673398 (1901-05-01), Keller et al.
patent: 3525405 (1970-08-01), Coyne et al.
LandOfFree
Tunneling drill bit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tunneling drill bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tunneling drill bit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1798718