Improvements in Automatic Valves for Pneumatic Tyres, Cushions, and the like.
Year: 1897

page_text: Date of Application, 15th May, 1897--Accepted, 10th July, 1897
[Communicated from abroad by GEORG MÜLLER, of 30 Wilhelmstrasse, Gmünd, in
the Kingdom of Wurtemburg, Manufacturer.]
Improvements in Automatic Valves for Pneumatic Tyres,
Cushions, and the like.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 322 High Holborn, in the County of Middlesex, 6, Lord Street,
Liverpool, and 6, Bank Street, Manchester, both in the County of Lancaster, and
Lower Temple Street, Birmingham, in the County of Warwick, Civil 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:-
My invention relates to automatic valves for pneumatic tyres of bicycles and
other vehicles, and for pneumatic cushions and the like. The valve has the
advantage that in pumping air into the tyre or cushion it is withdrawn from its
seat so that air may enter into the object to be inflated, while in moving backward
the pump piston the valve is automatically pressed against the seat so as to prevent
the escape of air.
The valve is so constructed that in case of repair it may easily be taken out and
replaced by a new one.
The valve forming the subject of the present invention has many advantages
over those hitherto in use. These valves consist of rubber-tubes which are placed
around an inner tube provided with an air opening. Some of these so-called
valves have the inconvenience that the valve is only pressed against the seat of
the inner tube after having filled the pneumatic tyre completely with air and
therefore permit air to escape between successive strokes of the pump, said escape
is in the improved valve entirely prevented.
In order to render the present specification more easily intelligible reference is
had to the accompanying drawings in which
Figure 1 is a vertical section.
Figure 2 is a section on line ww Figure 1.
Figure 3 is a vertical section of a modification and
Figure 4 a section on line - Figure 3.
Figure 5 is a vertical section of a further modification.
Figure 6 a plan and
Figure 7 a horizontal section on the line y-y of the same.
Figure 8 is a vertical section of a third modification and
Figure 9 and 10 are details drawn to an enlarged scale.
Figure 11 is a vertical section of a fourth modification.
Figure 12 a plan.
Figure 13 a horizontal section on line - and
Figure 14 a sectional view of the removable valve.
To the pneumatic tyre or the receptacle to be inflated I fix in usual manner
the sleeved through which the air is pumped into the receptacle a. As shewn in
Figures 1, 3, 5, 8, and 11 the tyre is secured between the head of the sleeve and

page_text: the nut b provided with a disc b' while the wheel rim c¹ is attached between the
nuts b and c.
In the design shewn in Figures 1 and 2 the sleeve d is provided with a conical
opening contracting at 3. Through this opening passes the automatic valve
which consists of a rubber band e and a rubber cap or plug e¹.
For attaching the valve I provide on the upper part of the sleeve da stay
(Figure 2) to which the rubber band e is secured by means of a knot e². The
upper part of the sleeve d is closed by a screw cap f provided with a packing f¹.
After removing this cap I am enabled to drive air into the tyre by means of the
ordinary air pump which is screwed to the upper part of the sleeve d.
In each forward movement of the pump piston, the air entering under pressure
presses away the rubber cap or plug e from its seat whereby the band a is
lengthened while in each back movement the cap or plug e¹ is automatically
pressed against the seat, so that the orifice is instantly closed and the air is
prevented from escaping. When the pumping operation is finished the valve is
closed by the cap f¹ whereby a double safety is attained.
It is to be understood that the cap f is not absolutely necessary, because cap c¹
would be sufficient to prevent the air from escaping.
The construction shewn in the Figures 3 and 4 is similar to that above des-
cribed with the difference that the valve ee may be readily removed. For this
purpose the valve is placed within a sleeve which is screwed into the sleeve d.
After removing the cap f the sleeve o may be easily taken out with the valve ce¹.
In order to render this possible without using any utensil the upper part of the
cap f is formed as a screw driver engaging with a corresponding recess o' of the
sleeve o.
The action of the modification shewn in the Figures 5, 6, and 7 is the same as
that of the forms herein above described.
As shewn by Figure 7 the automatic valve cel is fixed by means of the stay
and the knot within the sleeve which is provided with a packing (Figure 5)
placed around the upper reduced part of the same. The sleeve g is tightly placed
on the sleeve d at d.
The sleeve is held in place within the sleeve d by means of an elastic lock.
This latter consists of a sleeve h which is fitted with a central air opening h¹ and
a screwed portion h³ for connecting the pump; while at the inner part the sleeve
is fitted with a packing ³, to be placed on the upper part of the sleeve g. Between
the flanges h of the sleeve h is placed a rubber ring with which a lever provided
with bevelled projections is arranged. The lower projection engages
through a recess of the sleeve h with a small groove of the sleeve d (Figure 5)
while the upper projection k¹ presses on the flange of the cap for holding it in
place.
Figure 5 shews the position when the tyre is filled with air. For filling the tyre
it is only necessary to take away the cap 7 provided with packing 2 by pressing
backward the projection ¹ of the lever in the direction of the arrow (Figure 5)
whereupon the pump may be connected with the valve at h³.
This construction has the great advantage that the valve is easily accessible so
that it can be easily replaced.
l
For this purpose it is only necessary to remove the cap by drawing backward
the projection and to press out the projection (in the opposite direction) from
the groove of the sleeve d, so that the sleeve d and after this the sleeve g can be
taken out with the valve ee¹.
.
As shewn by these Figures this modification is constructed without using a
screw cap. The locking is effected only by pressing the sleeve hong until the
projection engages with the corresponding groove, whereby by reason of the
packing between the sleeves h and dan air tight closure is effected so that the air
is prevented from escaping. It is to be understood that by using the cap la double
safety closure is attained. The device has the further advantage that no part can
be lost.

page_text: The modification represented in the Figures 8, 9, and 10 has the same closing
device as the before described construction with the difference that the valve is
arranged in a different manner.
The sleeve d is provided with a packing (Figure 8) upon which the sleeve h
is fitted. Through the latter passes an air opening h5 (Figures 9 and 10) having
at the upper part the form of a funnel 6 and receiving a stay h7 to which the
rubber hande is fastened. Also in this construction the valve ee¹ is casily acces-
sible. The same is the case in the modification shewn in the Figures 11, 12, 13,
and 14 in which the valve cel is attached within a sleeve m (Figure 14) by means
of a stay.
The sleeve m is tightly fitted within the sleeved by means of a packing ring m¹
and is provided with a projection m² passing through slots of the sleeves d h.
This projection prevents on the one part the sleeve m from turning within the
sleeve and serves on the other part for easily removing the sleeve m.
To the upper part of the sleeve d is screwed a perforated body a provided with a
screwed portion 2 for connecting the pump.
The collar of this body lies on the
flange of the sleeve d. The opening of the stud is closed by the cap 7. As
shewn in Figure 12 this may be effected by means of a bayonet lock, and in this
case it is not necessary to level the projection ¹.
If it is desired to take out the valve the cap is first removed by turning the
recess of the flange in such a manner as to permit of the cap being lifted over
the projection . The projection is then pressed out from the opening of the
sleeve and the body n whereupon the sleeve is removed. After having un-
screwed body from sleeved the sleeve m may be easily taken out from sleeve d
by means of the projection m².
Figure 14 shews this sleeve and valve removed from remaining parts of the
device.
It is to be remarked that the rubber valve can be replaced by a spring valve of
suitable material.
Instead of the rubber ring I may also use a spring; but a rubber ring is more
preferable, because it is not liable to rust.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed as communicated to me
by my foreign correspondent I declare that what I claim is:-
1. An automatic valve for pneumatic tyres and cushions consisting of an elastic
or spring valve body (e) which is withdrawn from its seat in pumping air so as to
permit the entry of air but when the pump piston is moving backward the valve
body is automatically pressed against the seat so as to prevent the escape of air,
substantially as described.
2. An automatic valve for pneumatic tyres and cushions, consisting of a rubber
cap or plug (e) and a rubber band (e) which is secured to a stay by means of a
knot (c), substantially as described.
3. An automatic valve for pneumatic tyres and cushions in which the valve (eel)
is arranged within a sleeve (o) which is screwed to a second sleeve (d) attached to
thie tyre the upper part (12) of the closing cap (f) being formed as a screw driver,
substantially as described.
4. An automatic valve for pneumatic tyres and cushions in which the valve is
arranged within a sleeve (g) which is tightly fitted between the sleeves (hd) by
pressing the sleeve (h) on sleeve (d) in such a manner that the valve may be re-
moved with the sleeve () after having removed the cap and the upper sleeve,
substantially as described.
5. An automatic valve for pneumatic tyres and cushions in which the valve is
arranged between the sleeve (4) tightly fitted between the sleeve (d) and cap (!)
in such a manner that the valve after taking out the latter is easily accessible
substantially as described.
6. An automatic valve for puenmatic tyres and cushions in which the valve (ee¹)

page_text: is arranged within a sleeve (m) tightly fitted within a sleeve (d) and held in place
by means of a perforated body (n) in such a manner that the valve (ee¹) may be
taken out with the sleeve (m) after having removed the cap (7), the upper sleeve (h)
and the body (n), substantially as described.
7. An automatic valve for pneumatic tyres and cushions in which the sleeve (h)
is provided with a spring lever (k) two projections (¹) of which one engages
with the sleeve (d) and the other holds in place the cap (1) in such a manner
that all parts are firmly held in position, substantially as described.
8. An automatic valve for pneumatic tyres and cushions in which the cap / is
held in place by means of a bayonet lock, substantially as described.
Dated this 15th day of May 1897.
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C.,
Patent Agents for the Applicant.
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C.,
Patent Agents for the Applicant.