Double-acting Pump.
Year: 1894

page_text: Date of Application, 6th N.v., 1894
Complete Specification Left, 14th June, 1895-Accepted 27th July, 1895
PROVISIONAL SPECIFICATION.
Double-acting Pump.
ERNST HEUSCHKEL 44 Jewin Street London E.C. Manufacturer's Agent, do
hereby declare the nature of this invention to be as follows :-
A double-acting pump
a. The piston of which consists of a hollow cylinder. The covers of this cylinder
are fastened in such a way, that they changeably close the hollow piston according
to the movement inwards or outwards, and in this way, according to the arrange-
ment of the covers admit of the flowing out or pumping in of the air or fluid, from
or into the spaces above or below the piston.
b. The piston of which can be moved on a pipe. This pipe is provided with
holes which are opened and closed by moving the piston and this movement
allows the air to enter above or below this piston.
Dated this day the Sixth of November 1894.
ERNST HEUSCHKEL.
ERNST HEUSCHKEL Agent 44 Jewin Street London E.C. 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:-
Figs. 1 and 2. The double acting pump consists of a tube R both openings of
which are closed by covers D; these are provided with valves a and b. Through
one of these covers leading into a stuffing box passes the hollow piston-rod. The
piston K consists of a cylinder both ends of which can be changeably closed by the
conic or cylindric plates c and d. These plates are fastened at a certain distance
apart on the hollow piston rod and between them perforations lead into the hollow
piston-rod S.
If the tube R be moved in the direction to the arrow -y, Fig. 1 the plate c
covers the upper opening of the piston, the compressed air or fluid in the space u
closes the valve b and takes its way through the space between d and the lower
part of the cylinder and from there through the hollow piston-rod outside. At
the same time fresh air or fluid enters through the opened valve a into the enlarged
space o and when moving the tube R in the opposite direction to the arrow x-y
the plate c of the piston opens itself and the air or fluid finds also its way through
the piston rod S after the valve a has closed itself aud fresh air or fluid enters
through the opened valve o into the enlarged space u. In this way at every move-
ment of the tube R or of the piston a pressure of air or fluid is obtained in the
same direction.
If as shown in Fig. 2 the tube R is moved in the direction to the arrow x-y
the plate e covers the upper opening of the piston and the air in the space u as the
valve has closed itself will be dilated and fresh air enters through the piston
rod S. The air or fluid in the space o finds its way out through the opened valve a

page_text: When moving in the opposite direction to the arrow -y the plate d closes the
lower opening of the piston and the plate e opens the upper opening; the valve a is
closed whilst 6 opens itself, the air in the space o is dilated and fresh air or fluid
enters through the tube S. In this way a sucking or pumping takes place at every
movement of the tube R.
Fig. 3. This double acting pump consists of a tube R, both openings of which
are closed by covers M and N; these are provided with valves a and b. On the
piece e adjoining the cover M the movable piper provided with holes g and his
fixed. The moving of this pipe r is limited by pieces on the cover M and the
piece i. Over this pipe r the piston K moves perfectly airtight and the piston is
fastened to the hollow piston-rod S which is provided with the knob P. The
piston-rod has holes p and p close to the piston.
If the piston K be moved in the direction of the arrow x-y the pipe is also
moved so far that the holes g of the pipe cover the holes fand in this way allow
the compressed air of the space o to pass to the outside. At the same time the
ring which can be moved between the pieces K and m is pushed by the piston-rod
so that it closes the two holes h and fresh air enters through the opened valve b
into the space u.
If the piston K be moved in the opposite direction to the arrow x-y the ring
opens the holes and the pipe r moves so far that the holes g are closed. The air
in the space u finds its way through the holes and into the piper and from
there to the outside. Through the opened valves a fresh air enters into the
space o.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what
claim is
A Patent for a double acting pump.
1. The piston of this consists of a hollow cylinder. The covers of this cylinder
are fastened in such a way, that they changeably close the hollow piston according
to the movement inward or outward.
2. The piston of this is moved on a pipe. This pipe provided with holes
which are opened and closed by the movement of the piston and so according to
the arrangement of the covers admit of the flowing out or pumping in of air or
fluid from or into the spaces above or below the piston.
Dated this the 13th day of June 1895.
ERNST HEUSCHKEL.