Improvements in Valves for Pneumatic Tyres.
Year: 1892

page_text: Date of Application, 30th Sept., 1892-Accepted, 5th Nov., 1892
COMPLETE SPECIFICATION.
[Communicated from abroad by Messrs. SCHAFFER & BUDENBERG, of Buckau,
Magdeburg, in the Kingdom of Prussia and German Empire, Engineers:]
Improvements in Valves for Pneumatic Tyres.
I, WILLIAM EDWIN HEYS of 70 Market Street Manchester in the County
of Lancaster, Fellow of the Chartered Institute of Patent Agents, 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 valves for pneumatic tyres, which may be used for the
ordinary purposes of inflation and deflation alone, or which may be used for these
purposes and for the purpose of connecting a pressure gauge with the tyre for
ascertaining the pressure of the air therein.
If the valve is to be used for the ordinary purposes only, it may consist of a
valve body adapted to be screwed upon a nozzle connected through the rim with
the interior of the tyre. A vertical passage is formed through the body the upper
end of which is screwed to receive an internally threaded cap. The upper part of
the body is formed to a true surface, upon which an annular seating formed within
the cap would fit as accurately as possible when the cap is screwed down. To
make the joint between the upper part of the body and the annular seating quite
airtight, a disc of indiarubber, oiled cloth or the like, is interposed between them.
This disc serves also for more effectually closing the vertical holes formed in the
body of the valve, and for this purpose, it is backed by a metal or rigid disc which
is pressed upon the flexible disc by an axial screw having its head outside the top
of the cap.
On one side of the body of the valve there is a branch for inflating the tyre,
which communicates with a second vertical hole parallel with the axis of the valve.
This hole does not extend through the body of the valve, but leads only from the
branch to the upper surface.
When the tyre is to be inflated, the screw in the cap is loosened, thus allowing
the centre of the flexible disc to lift under the pressure of air from the inflator and
open the upper ends of the vertical holes, when the air can pass into the tyre.
When the tyre has to be deflated, it is necessary only to unscrew the cap slightly
when the air will at once leak away.
If it be required to use a pressure gauge or the like with the valve, a second
branch is added, which communicates with the upper face of the valve through a
vertical hole in the same manner as the first branch.
The accompanying drawings illustrate in what manner this invention may be
carried into practical effect and will be hereinafter referred to. In each of the
figures of the drawings similar parts are denoted by similar letters of reference.
Figure 1 is a plan of the valve with the cap and discs removed.
Figure 2 is a transverse section through a-, Figure 3.
Figure 3 is a vertical section through y-y, Figure 1.
Figure 4 is a vertical section through z-z, Figure 1.
Each of the figures is drawn to about twice the actual dimensions.
A is the body of the valve; B the valve cap; C the side branch through which
the tyre is inflated; D a side branch for a pressure gauge or the like; and E a cap
or plug for closing the side branch D when the gauge is removed.
The upper part of the valve body is made as smooth as practicable, and its lower
end has an internal or external thread formed upon it or is provided with a union
by means of which it may be screwed upon a suitable nozzle communicating with

page_text: the interior of the tyre. As shewn by Figures 3 and 4, it has an internal thread
for screwing upon such a nozzle, and for the purpose of making the joint as airtight
as possible, the orifice of the nozzle is coned for the reception of the plug G, the
conical part of which is covered with leather or indiarubber. The upper part of
this plug beds upon a leather or indiarubber seating H, which may be affixed
either upon the top of the plug or upon the seating. An axial hole is formed
through the plug to complete the communication between the valve and the interior
of the tyre.
The vertical hole F, is formed right through the valve body, and the holes c
and d parallel therewith, from the upper face to the side branches C and D
respectively, both of the side branch openings stopping short of the central hole.
The annular seating J, in the cap, is formed to fit upon the upper face of the
valve around the vertical passages, but between the seating and the face, there is
interposed a disc K of flexible airtight material such as oil-cloth. Leather or
indiarubber may be employed for the disc, but these substances do not so well
resist the rubbing action caused by the rotation of the cap as does the oil cloth.
On the upper side of the flexible air-tight disc K there is a metallic disc M on the
upper side of which the plate L presses by means of the screw S. The entire
removal of this screw by accident may be prevented by securing the plate L upon
its inner end.
The inflation branch C, may be fitted with a back pressure valve of any suitable
construction, as for example that shewn by the figures, which is of known
construction. In this valve P, a narrow strip of indiarubber O, is bound across
the orifice of the valve. This gives way before the pressure of the injected air,
but is pressed upon and closes the orifice by the internal pressure. The back
pressure valve may however be omitted, in which case the pump nozzle is screwed
into the branch C during inflation, and the cap and screw S are screwed down
before the pump is removed. The outer end of P, when used, may be covered with
a cap after inflation.
When a pressure gauge is used, it is screwed into the branch D, which at other
times is closed by the cap E on the other end of which a groove R may be formed
for the connection of a chain or cord, by which it is loosely attached to the valve
or to a spoke of the wheel to prevent its accidental loss.
A lock nut may be used on the screw S if desired.
To inflate the tyre, the screw S is loosened, which permits the central part of
the disc K to lift under pressure of the air entering e as shewn in Figure 3. A
passage is thus opened to F and to the interior of the tyre. After inflation, the
disc K is again screwed down, hermetically sealing all the holes in the valve face.
To deflate the tyre, the cap may be unscrewed, when the disc K will be removed
from the face and the air will escape through F, under the disc, and through the
loosened threads of the cap; or, through either of the side branches if they be
opened. It is not necessary to remove the cap altogether, although this may be
done if care be taken to remove any dust from the disc and valve face before
returning it.
If it be desired to use the valve for the purposes of inflation and deflation only,
the side branch D and its vertical hole d may be omitted.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. In a valve for a pneumatic tyre, the combination and arrangement with a
valve body adapted to be secured upon a nozzle connected with the tyre and having
a smooth upper face and a side branch for inflation, of a cap adapted to screw upon
the valve body and having an annular seating therein, a flexible air-tight disc or
diaphragm between the valve face and the annular seating, a rigid disc above the
flexible disc, a vertical screw acting upon the rigid disc, and vertical holes formed
in the body of the valve from the valve face through the body and to the side

page_text: branch respectively, substantially as hereinbefore described and as illustrated by
the accompanying drawings.
2. The combination and arrangement with a valve having a side inflating branch
as set forth in the preceding claiming clause, of a second side branch and a vertical
passage connecting the second side branch with the face of the valve, substantially
as and for the purpose herein before described and as illustrated by the accom-
panying drawings.
3. In a valve for pneumatic tyres, a perforated conical plug G, constructed and
arranged substantially as and for the purpose herein before described and as
illustrated by the accompanying drawings.
4. A valve for a pneumatic tyre, constructed and arranged substantially as and
for the purposes hereinbefore described and as illustrated by the accompanying
drawings.
Dated the 20th d
AD 1000
WILLIAM E. HEYS.