Impact device with a rotable control valve

Details Impact device with a rotable control valve Impact device with a rotable control valve

2007-11-06

2007-11-06

Nash, Brian D. (Department: 3721)

Tool driving or impacting

Impacting devices

Selective axial direction of impact

C173S200000, C173S204000, C173S202000

Reexamination Certificate

active

11206811

ABSTRACT:
An impact device includes a frame to which a tool is connectible, and a stress element that is supported on the frame and disposed between the frame and the tool. A hydraulic control system leads pressurized hydraulic fluid into and out of a hydraulic fluid space such that the stress element causes a stress pulse in the tool. The hydraulic control system includes a rotatingly installed control valve that has control openings for intermittently leading the hydraulic fluid out from the hydraulic fluid space.

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patent: WO 2005080051 (2005-09-01), None

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