Optics: measuring and testing – Dimension – Cavities
Reexamination Certificate
2007-03-06
2007-03-06
Lee, HWA (Andrew) (Department: 2877)
Optics: measuring and testing
Dimension
Cavities
C356S241100, C356S241400
Reexamination Certificate
active
10522190
ABSTRACT:
While a ball14is inserted into a hole WA of a workpiece W and is moved in the longitudinal direction of the hole WA while automatically centripetally moved, a change of back pressure of a gas injected into the hole WA is detected by a converter30, and at the same time reflected light from a reflection member18provided on the ball14is received by a light receiving unit22and a change of peak position A of an amount of the received light is calculated, so as to calculate an inner diameter, straightness, and cylindricity of the hole WA, thus providing an inexpensive noncontact measuring apparatus10which measures the inner diameter, the straightness, and the cylindricity of the hole WA.
REFERENCES:
patent: 4712916 (1987-12-01), Gunn
patent: 2002/0174707 (2002-11-01), Sawafuji et al.
patent: 2005/0005715 (2005-01-01), Sawafuji et al.
patent: 05-126556 (1993-05-01), None
patent: 2001-349721 (2001-12-01), None
Lee HWA (Andrew)
Punnoose Roy M.
Safran David S.
Tokyo Seimitsu Co. Ltd.
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