Improvements in Valves for Pneumatic Tyres and the like.
Year: 1898

page_text: COMPLETE SPECIFICATION.
Improvements in Valves for Pneumatic Tyres and the like.
I, CATELLO TRIBUZIO, of Turin, in the Kingdom of Italy, Inventor, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
The object of my invention is to provide an improved valve for pneumatic tyres
of bicycles or other vehicles or for other containers or apparatus intended to hold
compressed air or gases.
The invention is illustrated in the accompanying drawing in which Fig. 1 is a
section of one form of the valve fixed on to a rubber valve casing. Fig. 2 is a
section of another form of the valve arranged to be directly attached to the inner
tube or air tube of a pneumatic tyre. Fig. 3 is a section of another form in
which the valve is screwed to a metallic casing, the latter allowing of its attach-
ment to the air chamber for the purpose of facilitating the removal and repair
of the valve. Fig. 4 is a section of another form of the valve alone without any
means for attaching it to an air chamber, and Fig. 5 represents its cap.
The same letters of reference indicate the corresponding parts in all figures.
Referring first to the form shown in Fig. 1, A is the body of the valve, F is a
valve rod in same, B the lower part or valve proper which in this case is
cylindrical and has a conical upper part which abuts against a corresponding
conical shoulder of the body A, a packing of rubber, leather or other suitable
material E surrounding the rod F at its lower part and abutting against a further
shoulder A of the body A. This shoulder A¹ may be conical if desired and pro-
vides as will be seen a double check to the escape of air.
In order to limit the movement of the valve B and to prevent it from turning
round, its end is provided with a notch across which lies a pin or screw D which
is held in the body of the valve. Said screw and notch could also be arranged at
any other suitable point along the rod F. The upper end of the rod F is threaded
to receive a cap C which is also independently represented in Fig. 5 such cap
having an extension C adapted to extend downwardly around the rod on which
it is screwed and between it and the body A which is not screwed nor is the
extension at these points. A washer G of leather or other suitable material is
placed in an annular recess in the cap C to act as a packing.
The object of the cap is to more completely ensure the air tight closing of the
valve B against its seat by the tension exercised on the rod F when it is screwed
on and at the same time to produce a second closing point at the packing G.
This packing can however be dispensed with the closing being then confined
to the valve assisted by the tension of the cap; but the addition of the packing G
is of service and it is accessible for renewal. The downwardly extending part C¹
of the cap may be dispensed with and the cap may also be screwed directly on to
the body A but the arrangement described is preferred.
The air is introduced in the ordinary way, that is to say, after having unscrewed
the cap C the flexible or other tube of a pump is screwed on to the upper

page_text: extremity of the body A of the valve, the latter being provided with suitable
threads for the purpose. By operating the pump the compressed air is caused to
force down the valve and to enter into the air tube or chamber or other receptacle
to which the valve is attached. The air cannot escape because of the back
pressure of the compressed air automatically closing the valve B and pressing
it upon its seat. When the chamber is sufficiently filled the pump tube is
unscrewed and replaced by the cap which completes the closing of the valve.
Other forms of cylindrical valves having conical heads may be employed over
that illustrated.
In Figure 2 the valve B is cylindrical but its upper surface is flat and is
recessed to receive an annular packing ring E which abuts against an annular
rib A2 on a shoulder of the body portion A.
In Fig. 3 the valve has a packing E on its conical part and to keep the packing
in place the rod F may have notches F of the shape of saw teeth while below
said valve is a flat prolongation B3 which passes between two lugs P in a casing M
and serves to guide the rod F. The cylindrical part is larger than the conical
part so that a seat for the packing E is secured.
In Fig. 4 the packing E is conical the body portion is cylindrical and is guided
by a slot and screw 1).
For attaching the valve to the receptacle or air container many ways can be
made use of, but I prefer the following three methods, which form part of my
invention, and which are represented in Figs. 1, 2, 3. In Fig. 1 which is an
arrangement adapted for pneumatic tyres the valve is so arranged as to be
attached to the air receptacle W by means of a rubber casing T strengthened by
a covering of linen or canvas and cemented on or forming one and the same body
with the receptacle W.
The lower part of the body of the valve A is enlarged at Q. A sleeve R screws
upon the body of the valve and has an extension R₁ which slips over the tubular
part of the casing T. Said sleeve R is kept in position by means of a nut S
which also screws on the body A so that the valve is solidly secured in the tubular
part of the valve casing. The escape of air being completely prevented.
In Fig. 2 its valve is arranged so as to be directly fixed to the receptacle W.
The body A of the valve is provided at its bottom part with a flange m which
comes on the inside of the receptacle W the rest of the valve projecting through
a hole in same and on the other side of the receptacle is a washer or nut H which
is held down by a nut I. The surfaces of the flange m and washer H between
which the material is held are provided with circular grooves of saw teeth like
section, in order to hold the valve to the material.
The nut I and the corresponding threads of the body of the valve are left
handed, that is to say, are cut in the reversed sense of the ordinary screws, in
order to prevent the nut from loosening when the cap or the flexible tube are
screwed on. Lis the ordinary nut screwing on the body portion A to hold the
valve and receptacle W to the rim of a vehicle wheel.
Fig. 3 represents the body A so arranged as to be attached to the receptacle W,
by an intermediate metal tube or casing M, which means will facilitate the dis-
mounting of the valve. The casing M is provided with a flange m and a washer H
also with a nut I and a second nut L, which are all arranged in the same manner
as above described and serve the same purpose.
The valve is screwed into the casing M and has a flange N which rests on the
upper end of the casing, by means of a packing 0 of leather or of any other suit-
able material placed in a recess of the flange so as to form an air tight joint.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. In a valve for pneumatic tyres and the like and in combination, a cap having
a part extending downwardly, the valve body, the valve rod, said downwardly

page_text: extending part occupying a space between the body and rod, a packing inserted
in a groove in said cap, on which the top of the body bears, and a screw thread on
the rod or body portion, on which the cap is adapted to screw to draw the valve
to its seat, substantially as described.
2. In a valve for pneumatic tyres and the like and in combination with the
valve body and valve portion, a pin secured in said body and passing through
the valve to prevent it from turning round, substantially as described.
3. In a valve for pneumatic tyres and the like and in combination, a valve
portion having a conical surface, the valve body, the latter having a conical
shoulder for the valve and second shoulder, the valve rod and a packing round
same adapted to bear against the second shoulder substantially as and for the
purpose described.
4. In a valve for pneumatic tyres and the like and in combination, a valve
portion of cylindrical shape having an annular packing in a recess thereof and
the valve body having a shoulder and an annular rib on which the packing seats
substantially as described.
5. In a valve for pneumatic tyres and the like, a conical faced valve portion
and a rod for same, the former having a packing round same kept in place by
saw teeth on the rod and by an enlargement of the body of the valve, substan-
tially as described.
G. In a valve for pneumatic tyres and the like, and in combination, the tyre, a
valve, body portion having an enlarged part, a screw threaded portion, a sleeve
carried by same, an extension on same, a rubber casing having a tubular part,
said casing being attached to the tyre, and said tubular part being adapted to be
covered by the extension of the sleeve and to be squeezed on the enlargement of
the valve body substantially as and for the purpose described.
7. In a valve for pneumatic tyres and the like, and in combination, a screwed
part carrying the valve portion, the pneumatic container, a flange on said part
provided with grooves of saw teeth like section, a washer provided with similar
grooves, and a nut, working on the screwed part for holding the washer on to the
material of the pneumatic container and pressing the latter to the flange, sub-
stantially as described.
8. In a valve for pneumatic tyres and the like, and in combination, the air
container, the valve body having a flange and a packing in a recess thereof on a
screwed exterior, a casing into which the valve body is adapted to screw so that
its upper end seats on the packing and forms a tight joint, and means for attach-
ing the casing to the air container substantially as and for the purpose described.
9. The improved valves substantially as and for the purposes described and
as illustrated in the accompanying drawing.
Tand the 11th dose of trans 1808
PHILIP M. JUSTICE,
Chartered Patent Agent, London, for the Applicant.