Improvements in Cocks or Taps for Use with Liquids under Pressure.
Year: 1887

page_text: Improvements in Cocks or Taps for Use with Liquids under
Pressure.
We, ERNEST BEAUVALET and LÉON BEAUVALET, both of 3 Rue Perrault, Paris
France 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 improvements in cocks or taps designed for use with
liquids under pressure.
A cock or tap according thereto is of very simple construction. The liquid under
pressure acts upon a ball (conveniently of india rubber) which serves as a valve,
and presses it against the outlet.
The liquid can be drawn off by operating a rod or plunger so as to force the ball
away from its seat.
In the annexed drawing
Fig. 1 shews a cock or tap embodying the improvements.
Fig. 2 is a view shewing the head of the cock or tap in section.
Figs. 3 and 4 are detail views hereinafter more fully referred to.
The body A has a threaded portion a adapted to be screwed upon the reservoir
containing the fluid under pressure, or upon a pipe or passage leading therefrom;
the internal cylindrical recess of this portion a constitutes a chamber closed by a
plug B. This plug (the front of which is seen in Fig. 3) is pierced with holes t, t,
for the passage of the liquid.
The chamber C communicates with the outlet F by an opening b on whose seat
bears the ball D. The spindle or stem E of the plunger G moves in the opening b
with considerable play and is formed with recesses as shewn (Fig. 1,); it is guided
at its other end by a shoulder which slides in a chamber H formed in the head of the
cock or tap and made tight by packing.
It will be readily seen that water, or other liquid under pressure, acting upon the
ball D, will press it upon the seat of the opening b, and prevent liquid from passing
When however liquid is required it is sufficient to press upon the head G of
out.
This invention relates to improvements in cocks or taps designed for use with
liquids under pressure.
A cock or tap according thereto is of very simple construction. The liquid under
pressure acts upon a ball (conveniently of india rubber) which serves as a valve,
and presses it against the outlet.
The liquid can be drawn off by operating a rod or plunger so as to force the ball
away from its seat.
In the annexed drawing
Fig. 1 shews a cock or tap embodying the improvements.
Fig. 2 is a view shewing the head of the cock or tap in section.
Figs. 3 and 4 are detail views hereinafter more fully referred to.
The body A has a threaded portion a adapted to be screwed upon the reservoir
containing the fluid under pressure, or upon a pipe or passage leading therefrom;
the internal cylindrical recess of this portion a constitutes a chamber closed by a
plug B. This plug (the front of which is seen in Fig. 3) is pierced with holes t, t,
for the passage of the liquid.
The chamber C communicates with the outlet F by an opening b on whose seat
bears the ball D. The spindle or stem E of the plunger G moves in the opening b
with considerable play and is forned with recesses as shewn (Fig. 1,); it is guided
at its other end by a shoulder which slides in a chamber H formed in the head of the
cock or tap and made tight by packing.
It will be readily seen that water, or other liquid under pressure, acting upon the
ball D, will press it upon the seat of the opening b, and prevent liquid from passing
When however liquid is required it is sufficient to press upon the head G of
out.

page_text: the plunger the ball D will then be forced away from its seat, allow the liquid to
flow out through the opening band spout F.
When pressure upon the plunger ceases the pressure of the liquid acts upon the
ball D, and again closes the orifice b, maintaining an air tight closure thus avoiding
escape of liquid which frequently happens with taps or cocks as heretofore constructed.
When the pressure of the liquid is great the apertures tttt, in the plug B, serve, by
reason of their oblique direction, to in some degree lessen the effect of such pressure.
If the pressure of the fluid is small, the apertures t t t t are parallel with the axis
of the cock or tap in this case a small helical spring may be placed in the chamber H
to facilitate the return movement of the stem of the plunger.
The discharge orifice or spout F is by preference formed of the section illustrated
by Fig. 4.
As will be evident the characteristic feature of the invention can be readily applied
to screw taps, to closing devices on the "bayonet" system, to taps for waterclosets
with forced flow, to float cocks, and to various systems of taps and cocks in which
water or other fluid is admitted under pressure.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed we declare that what we claim is :-
(1.) In a cock or tap an elastic ball such as D arranged to be acted upon by
pressure of liquid and to hermetically close a conduit, the said ball being pressed
against the seat of the outlet opening substantially as described.
(2.) In a cock such as referred to the arrangement of parts, consisting essentially
of an elastic rubber ball D located in a chamber closed by a plug B perforated with
holes oblique or parallel to the axis; the said ball D being so arranged that it will by
pressure of liquid be forced against the seat of the opening b so as to hermetically
close the outlet; and that it will allow the liquid to escape by the opening F when
pressure is applied (by hand) to the push G as described.
(5.) The improved cock or tap shewn in and described with reference to the
drawings annexed.
Dated this 15th day of December 1887.
ERNEST BEAUVALET.
LÉON BEAUVALET.