Tool driving or impacting – Impacting devices – With means for rotating tool
Reexamination Certificate
2005-01-18
2005-01-18
Smith, Scott A. (Department: 3721)
Tool driving or impacting
Impacting devices
With means for rotating tool
C173S049000, C173S104000, C173S111000, C173S131000
Reexamination Certificate
active
06843329
ABSTRACT:
The inventive rotary percussion device (1) used for driving at least one drill column (2) disposes of a percussion device (6) and a rotary device (5) and of an insertion end (3), which is rotatably mounted in a device body (8) and which has an axial boring, in which a percussion piston (4) is displaceably mounted. The insertion end (3), which is connected to the drill column (2) by a connection piece (33), is driven by the rotary device (5), and the percussion piston (4) mounted in the insertion end (3) is driven independently thereof by the percussion device (6). The percussion energy transmitted to the drill column (2) via the percussion piston (4) has, as a result, largely reduced influences upon the insertion end (3) that, according to the invention, is decoupled from the percussion device (5) so that premature material fatigue is prevented. In addition, the noise emissions occurring during the operation of the inventive rotary percussion device (1) are largely reduced.
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“DEPS: Doppel-Schlagbohrsystem, Die schnellste Bohrmethode in kiüftigen Formationen,” Company publication from Atlas Copco No. 6991 0757 04a, Mar. 1998, pp. 1-4.
Chukwurah Nathaniel
Oliff & Berridg,e PLC
LandOfFree
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