Liquid flow control assembly
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United States of America Patent
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-
Jun 6, 1989
Issued Date -
N/A
app pub date -
May 9, 1988
filing date -
Apr 7, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Liquid flow through a passage (9) in a body member (7) is controlled by a relatively movable poppet valve member (8). A frusto-conical first guide surface (11) on the poppet valve (8) merges smoothly with a second guide surface (12 and 13) which, in cross-section, has part-circulr portion (12) and an outlet end (13). Liquid passing through an aperture (10) between the body member (7) and the poppet valve member (8) flows along the first guide surface (11) and the second guide surface (12 and 13) and adopts a toroidal vortex flow pattern and this controls the collapse of those bubbles which form as a result of cavitation so as to diminish audible and inaudible vibrations.
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