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Gravity feed of a liquid through a valve is improved by employing a relatively flat-faced seal and side relief channels to prevent air bubble blockage.
English (United States)
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Gravity feed of a liquid through a valve is improved by employing a relatively
flat-faced seal and side relief channels to prevent air bubble blockage.
Supply bottle 10 is attached to valve body 12 by the threaded neck 14. The
valve body 12 is placed in its inverted position into a receiving tray 15 which
contains a stud 16 that forces valve pin 17 and valve seal 20 upwardly into the
position shown in Fig. 1. The face 21 of seal 20 is either completely flat or with a
small outer peripheral ring so that openings 22 and 23 are closed except when
the device is in place, as shown in Fig. 1, and actuated by stud 16. As opened,
the liquid in container 10 escapes around seal 20, through ports 22 and 23 and
out cutout 25 to maintain an appropriate gravity-fed level.
As visible in Figs. 2 and 3, the threaded inner face 30 of body 12 contains
slots 31 and 32 along opposite walls and extending from the interior of body 12 to
the end. Accordingly, air bubbles are not trapped between openings 22 and 23
and seal 20, but are allowed to escape around the face 21 and through slots 31
and 32. Seal 20 is maintaining a close position over openings 22 and 23 by a
spring (not shown) when body 12 is removed from receiving tray 15.
The device is particularly useful for metering oil or other relatively thick liquid
by gravity into a constant level receiving tray.
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