Impact enhancing apparatus and method

Details Impact enhancing apparatus and method Impact enhancing apparatus and method

2005-06-23

2008-11-18

Gay, Jennifer H (Department: 3676)

Boring or penetrating the earth

Processes

C175S296000, C166S301000

Reexamination Certificate

active

07451834

ABSTRACT:
An impact enhancer apparatus includes: a substantially tubular inner member, a substantially tubular outer member that is axially movable in relation to the inner member, a primary energy storage device adapted to store energy when the inner member is moved in either of first and second axial directions with respect to the outer member and a secondary energy storage device adapted to store energy when the inner member is moved in a first axial direction with respect to the outer member. The primary energy storage device may include a primary biasing device. The secondary energy storage device may include a secondary biasing device. The primary and/or secondary biasing devices may be a spring device such as a disk spring, a coiled spring, a fluid spring, a gas spring, etc. The impact enhancing devices may include tubular members that have double shoulder high torque connections.

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patent: 2005/0287854 (2005-12-01), Shears et al.

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