Pneumatic percussive mechanism
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United States of America Patent
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Oct 5, 2004
Grant Date -
Nov 6, 2003
app pub date -
May 1, 2003
filing date -
May 3, 2002
priority date (Note) -
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Abstract
A pneumatic percussive mechanism having an axially reciprocating percussive loaded percussion piston (2), wherein a non-contacting magnetic field sensitive sensor (3) is arranged radial thereto. The percussion piston (2) features at least externally ferromagnetic material and has a plurality of axially separated zones (4) of different magnetic permeability.
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