Improvements in Appliances for Drawing Off Liquids from Closed Vessels.
Year: 1897

page_text: Date of Application, 8th Apr., 1897-Accepted, 3rd July, 1897
COMPLETE SPECIFICATION.
1
Improvements in Appliances for Drawing Off Liquids from Closed
Vessels.
I, PAUL BAUMERT, of 58 Mohrenstrasse, Berlin, in the German Empire, Engineer,
do hereby declare the nature of this invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
This Invention relates to appliances or apparatus for drawing off liquids from closed
vessels such as vats and casks, and has been especially designed for use in the case
of liquids which lose quality or quantity by exposure to air, without adopting such
expedients as that of introducing carbonic dioxide under pressure into the vessels,
as in the case of beer. My Improvements may also be employed in cases where
the liquid has not only to be drawn off, but has also to be forced or lifted.
The accompanying drawings illustrate these Improvements and will be hereinafter
referred to.
Figure 1 represents in cross section my appliances as applied to a cask, a portion
of which is shewn in longitudinal section. Fig. 2 represents a cross section of the
upper part of the cask and of that part of my appliances connected therewith. Figure 3
represents in cross section the pump which is also shewn in Figure 1.
A tap A, has attached to it a pump cylinder C, in the bottom of which there are
two openings or ports, one of which communicates with the passage p' through the
tap and thus with the interior of the cask, and the other with the bib or outlet z. In
the passage p of the tap A, there is a back-pressure valve v, and in the outlet another
back-pressure valve k. In the interior of the cylinder there is a piston d, having a
rod provided with a handle g. There is a passage formed through the piston and
piston rod, the upper part of which is controlled by a tap i, which by means of suitable
devices is opened and closed by the movement of the piston. As shewn by the
drawings, the tap is provided for this purpose, with a handle m, linked by a short
chain to the arm 8. The outlet from this passage communicates by a flexible hose or
pipe h, with a vent tap B, at the highest part of the cask or other vessel, or an
equivalent means of communication can be arranged, so that when the taps B and i
are open, there is direct communication between the space in the upper
part of the cask and the space under the pump piston d. If, when the taps B i are
open, the piston be pulled upwards, it will be evident that the pressure in the upper
part of the cask and below the piston will be the same. The weight of the liquid
therefore causes it to flow, after lifting the valve v, because the level of the bottom
surface of the piston is below the level of the liquid in the cask. When the piston
has reached about the top of its stroke, the tap is closed automatically by the
connection of its handle with the arm 8. If now the piston be moved downwards, the
valve v closes and the liquid in the cylinder is displaced through the tap outlet, it
having then opened the valve k. The issuing liquid may be caught at the bib of the
tap, or the tap nozzle may be connected with a pipe through the which the liquid
will be forced by the pump to any reasonable point desired. When the piston has
reached again the bottom of the cylinder, the tap i has again been automatically
opened by the contact of its handle with the arm 8, so that communication between

page_text: the underside of the piston and the space at the top of the inside of the cask has been
restored. As the contents of the cask or vessel are drawn off, there will be an
increased rarefaction of the air, but so long as the level of the liquid remains above
the level of the under surface of the piston, the liquid can be drawn off as hereinbefore
described, without admission of air and consequently without loss to or of the liquid
which might be a consequence of such air admission.
If the cask or other vessel is to be completely emptied the tap A must be arranged
at the lowest possible level and the pump instead of being in contact with it, may
be placed at a lower level and be connected with the tap by a suitable pipe or
equivalent connection.
Having now particularly described and ascertained the nature of my invention and
in what manner the same is to be performed, I declare that what I claim is :-
1. Apparatus for drawing off liquids from closed vessels without admission of
external air, consisting essentially of a tap having attached to or connected therewith
a single acting pump provided with a passage through its piston and piston rod which
passage is automatically opened and closed by the movement of the piston rod and
communicates with a vent tap in the upper part of the cask: a non-return valve
controlling the passage from the tap to the pump: and a non-return valve
controlling the outlet from the pump into the tap passage: constructed arranged
and operating substantially as herein before described and as illustrated by the
accompanying drawings.
2. Apparatus for drawing off liquids from closed vessels without admission of air,
constructed arranged and operating substantially as hereinbefore described with
reference to the accompanying drawings.