Measuring and testing – Sampler – sample handling – etc. – Flow divider – deflector – or interceptor
Patent
1982-05-06
1984-06-12
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
Flow divider, deflector, or interceptor
29421E, 73799, G01N 128
Patent
active
044534230
ABSTRACT:
A method and apparatus for generating a measurable natural crack includes forming a primary notch in the surface of a solid material. A non-sustained single pressure pulse is then generated in the vicinity of the primary notch, resulting in the formation of a shock wave which travels through the material. The shock wave creates a measurable natural crack within the material which extends from the primary notch. The natural crack formed possesses predictable geometry, location and orientation.
REFERENCES:
patent: 2703297 (1955-03-01), MacLeod
patent: 3076408 (1963-02-01), Poulter
patent: 3353401 (1967-11-01), Hessler
patent: 3376633 (1968-04-01), Wesley
patent: 3482437 (1969-12-01), Martens
patent: 3669022 (1972-06-01), Dahn
patent: 3680367 (1972-08-01), Krafft
patent: 4075884 (1978-02-01), Barker
patent: 4090489 (1978-05-01), Barker
Fulton Fred J.
Holman William R.
Honodel Charles A.
Weingart Richard C.
Davis Paul
Dixon Harold M.
Esposito Michael F.
Swisher S. Clement
The United States of America as represented by the United States
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