Sonic casting tester

Details Sonic casting tester Sonic casting tester

1991-06-10

1992-05-05

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73592, 73599, G01H 1500

Patent

active

051096994

ABSTRACT:
A method and apparatus for detecting a blockage in a cored passage of a hydraulic valve casting includes a sound generating device disposed within the spool bore and communicating with the passageway so that a sound wave may be introduced into the passageway and a sound detecting device disposed within the spool bore and communicating with an opposite end of the passageway so that the level of sound transmitted through the passageway may be detected.

REFERENCES:
patent: 1884042 (1932-10-01), Marlin
patent: 4480473 (1984-11-01), Varterasian et al.
patent: 4653327 (1987-03-01), Varterasian et al.
patent: 4821769 (1989-04-01), Mills et al.

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