Impulse generator, hydraulic impulse tool and method for producing impulses
AssigneeAtlas Copco Rock Drills AB
InventorsKenneth Weddfelt, Göran Tuomas, Risto Wisakanto
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Abstract
An impulse generator (1) for a percussive tool includes a chamber (3) for receiving a liquid volume and an impulse piston (4) which is arranged for transferring pressure pulses in the liquid volume into stress wave pulses in the tool. The chamber (3) is adapted with respect to its shape such that it forms a resonance chamber for liquid in the liquid volume for forming at least one pressure antinode (11,15,17) inside the chamber. The invention also concerns a method and a hydraulic impulse tool.
Claims16
Method for producing impulses for a percussive tool including a chamber for receiving a liquid volume and an impulse piston which is arranged for transferring pressure pulses in the liquid volume into stress wave pulses in the tool, the steps of said method comprising periodically influencing liquid in the chamber for setting the liquid volume in resonance for forming at least one pressure antinode in the chamber.
Dependencies are inferred from the claim text.