Boring or penetrating the earth – With below-ground tool drive prime mover – With means to anchor prime movers support to bore wall
Reexamination Certificate
2005-03-17
2008-07-01
Wright, Glovanna C (Department: 3672)
Boring or penetrating the earth
With below-ground tool drive prime mover
With means to anchor prime movers support to bore wall
C175S098000, C175S051000
Reexamination Certificate
active
07392859
ABSTRACT:
An expandable gripper assembly may be configured for anchoring a tool in a passage. The expandable gripper assembly includes first, second, and third pivotally connected links that are coupled to a tool. The third link is adapted to engage an inner wall in the passage. An actuation mechanism causes the third link to move radially outward from the tool for engagement with the inner wall. The actuation mechanism may comprise a roller mechanism that pushes on an inner surface of the first link for causing the first link to pivot outward away from the body. As the first and second links pivot outward, the third link moves in a radial direction for engagement with an inner wall.
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Bloom Duane
Mock Philip W.
Moore N. Bruce
Knobbe Martens Olson & Bear LLP
Western Well Tool, Inc.
Wright Glovanna C
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