Plug gauge for checking geometric features of parts with rotational symmetry
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United States of America Patent
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-
Dec 28, 1999
Grant Date -
N/A
app pub date -
Dec 12, 1997
filing date -
Aug 3, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A plug gauge for checking shape errors, in particular, the roundness of a valve seat. The plug gauge comprises seating surfaces adapted for cooperating with the surface of the valve seat, and a pneumatic circuit with an annular nozzle at the seating surfaces. The gauge comprises two coaxial cylindrical elements, one of the two housed within the other, that can reciprocally translate in an axial direction and that comprises associated resting surfaces, such that both cylindrical elements may rest on the seat surface to be checked. The annular nozzle is substantially defined by an internal and an external cylindrical portion of said two reciprocally movable elements.
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