Damping device for a percussion rock drilling machine

Details Damping device for a percussion rock drilling machine Damping device for a percussion rock drilling machine

1987-10-07

1989-10-03

Yost, Frank T.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

92 85B, B23B 4516

Patent

active

048710350

ABSTRACT:
Damping device for a percussion rock drilling machine. A damper piston (22) and a compressed air cushion in a damping chamber (23) transfer feeding force from the drill machine housing (11) to the drill string (15). A venting valve (51) is arranged for venting the damping chamber (23) after which the damping chamber can be pressurized with a selectable pressure.

REFERENCES:
patent: 4068727 (1978-01-01), Anderson et al.

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