Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid head on tool shaft having lateral port and axial...
Reexamination Certificate
2011-06-28
2011-06-28
Bagnell, David J (Department: 3672)
Boring or penetrating the earth
With above-ground means for handling drilling fluid or cutting
Fluid head on tool shaft having lateral port and axial...
C173S197000
Reexamination Certificate
active
07967084
ABSTRACT:
An external water delivery system includes a water box front head, a collet configured to interface with the water box front head, a polymer sleeve configured to be positioned between the water box front head and the collet, a shank, and at least one seal positioned within the sleeve. The sleeve and seals are configured to provide a water chamber when coupled to the shank. An inner of the sleeve provides a bearing surface for the shank.
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patent: 6273199 (2001-08-01), Kiikka et al.
patent: 1077305 (2001-02-01), None
patent: 2004/079152 (2004-09-01), None
Alker Richard
Bagnell David J
Longyear TM, Inc.
Workman Nydegger
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