Improvements in Pumps for Petroleum, Oil, Spirit, Varnish, and other Liquids.
Year: 1891

page_text: Date of Application, 16th July, 1891-Accepted, 5th Sept., 1891
Improvements in Pumps for Petroleum, Oil, Spirit, Varnish, and
other Liquids.
I FRIEDRICH ADOLF VIЕHWEG of Falkenstein, Vogtlande, in the Kingdom
of Saxony, Master-tinman, 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 for improvements in pumps for petroleum, oil, spirit, varnish and
other liquids has for its object to construct a pump which can be readily emptied
after use, without having to shake it to and fro for a considerable time and in which
the liquid is prevented from splashing out above the pump.
The accompanying drawing shows in vertical section a pump constructed
according to this invention.
g
The pump barrel a is made of two parts connected together at a¹ by a sort of
bayonet joint. The lower edge 6 of the upper part is bent up inwardly and supports
the valve seat o which is pressed thereon by a spiral spring d. Between b and c is
placed a packing ring e. The spring d bears below upon the bottom f which is
perforated and detachable. Upon the valve seat c rests the valve which
is surrounded by a perforated casing i provided with the perforated screw cap h.
The piston has also its lower edge l bent up inwardly, the valve seat m being
pressed thereon by the spiral spring n. Between and m is placed a packing ring o.
The spring n bears at the top against the perforated disc p. Upon the valve seat m
rests the valve g which is surrounded by the perforated casings provided with a
perforated screw cap r. This valve seat m is provided below with a prolongation &
which, when the piston rod is depressed bears upon the screw cap h of the pump
barrel valve.
Over the top u of the pump is arranged an outer cover or guide w which pivots
upon the wire v and is fork shape in the centre to allow for the passage of the
piston rod which strikes against it when pumping by means of the projections or
flanges y.
When the pump requires to be emptied after use, the piston rod x is drawn up
the cover w is folded back into the position shown in dotted lines, and the piston
rod is pushed down again which causes the prolongation of the piston valve to
strike against the screw cap of the pump barrel valve, the springs d and n being
pressed downwardly and upwardly respectively and the valve seats c and m raised
by the edges b and so that all the liquid left in the pump can run off below into
the vessel or receptacle which is being emptied. To prevent the liquid splashing
out at the top during pumping a channel 2 is formed in the outlet pipe 1 and is
connected therewith through the opening 3. The upper end of the pump barrel a
is surrounded by another barrel or casing 4, the lower part 5 of which is inclined
towards the channel 2. At the top the pump is tightly closed by the two casings uu
between which is packing material. This closing arrangement is removable and
is locked by means of two hooks 6 forced over the broken rounded edge of the
casing 4.
The liquid raised, when pumping, beyond the outlet pipe 1 runs over the edge 8
of the pump barrel a (which only extends to this point) and into the wide casing 4,
falling upon the inclined bottom surface 5 which conveys it to the lateral channel 2
and pipe 1 through the openings 3 to the outlet pipe 1.
The first described emptying arrangement may also be used for fixed water
pumps such as yard, garden and stable yard pumps in order to protect the same
from the effects of frost during winter time. Pumps of this construction should

page_text: have a cock fixed to the outlet pipe and allowing the back running water to be
discharged.
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 I
claim is :-
1. An arrangement for emptying pumps after use so constructed that after the
outer lid w has been removed, the piston rod can be sunk deeper than while in use
and whereby the valve seats arranged to move in opposite directions and forced by
springs against their seats blare pressed together and raised from the said seats,
in consequence whereof the liquid left behind is allowed to run down into the vessel
being emptied substantially as described.
2. An arrangement for preventing the splashing out of the liquid at the top of a
pump while pumping whereby the part of the pump barrel situated above the outlet
pipe 1 is surrounded by a wider barrel or casing so as to communicate therewith,
the said wider barrel or casing taking up the splashed up liquids and conveying the
same over the inclined bottom surface (5) into a lateral channel whence it runs out
through the outlet pipe 1 substantially as described.
3. The arrangement of pumps for petroleum, oil spirit, varnish and other liquids
substantially as described with reference to the drawings.
Dated this 16th day of July 1891.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.