Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1993-08-16
1995-04-25
Williams, Hezron E.
Measuring and testing
With fluid pressure
Porosity or permeability
73 6447, 422101, 424449, A61F 1356, G01N 1300
Patent
active
054088658
ABSTRACT:
In a transdermal cell, a matter volume-adjustment male device includes the lower opening end of the through-space structure having inner wall female threads mateable with first male threads of a screwable matter volume-adjustment male member alternately adjustable upwardly and downwardly between opposite upper and lower female threads-termination points. The screwable matter volume-adjustment member has opposite first upper and lower male threads-termination points, and the inner wall female threads are further concurrently mateable with a bottom closure member having second male threads having opposite second upper and lower male threads-termination points. There is a first annular sealing ring sealably mounted in an annular groove around the screwable volume-adjustment male member between the first upper and lower threads-termination points positioned between the inner wall female threads and the first male threads, and there being a second annular sealing ring sealably mounted the second male threads at a location below the second upper termination point.
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patent: 5108710 (1992-04-01), Little et al.
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Collins Charles C.
Hofer Henry
Little Amy C.
Sanghvi Pradeepkumar P.
Swon James E.
Hough William T.
Wiggins J. David
Williams Hezron E.
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