Valves for Pneumatic Tires.
Year: 1898

page_text: Date of Application, 12th Dec., 1898
Complete Specification Left, 11th Sept., 1899-Accepted, 11th Nov.,
1899
Valves for Pneumatic Tires.
I, EDWARD FORBES PICKETT, of 324, Bird Avenue, Buffalo, County of Erie,
State of New York, U.S.A., Draftsman, do hereby declare the nature of this
invention to be as follows:-
This invention relates to a valve designed more especially for pneumatic tires.
One of the objects of my invention is the production of a reliable valve which
comprises a minimum number of parts and which can be manufactured at small
cost. The invention has the further objects to protect the valve from dust &c.,
and to so attach the same to the tire that it does not act to retain the latter upon
the wheel rim in the event of the tire being stripped therefrom, thus avoiding
injury or destruction of the tire.
In the accompanying drawing:-
Figure 1 is a longitudinal section of my improved valve applied to a pneumatic
tire. Figure 2 is a similar view showing the manner of forcing air through the
valve. Figure 3 is a cross section of the valve in line 3-3, Figure 1. Figures 4
and 5 are longitudinal sections, each showing a modified construction of the valve.
Like letters of reference refer to like parts in the several figures.
A is the pneumatic tire of any suitable construction and B a wheel rim to
which the tire is applied.
C is the outer tube or casing of my improved valve which is preferably arranged
within the hollow tire and attached at its outer end solely to the tire, so as to be
entirely independent of the rim. This internal valve-case is preferably attached
to one side of the tire, as shown in the drawing, and is provided on its outer
portion with attaching flanges or collars, c, c¹ which are secured to the inner and
outer surfaces of the tire by cement or other suitable means, the tire having an
opening for the passage of the valve-case. This valve-case extends from its
attached end inwardly into the chamber of the tire and is thus enclosed by the
tire and protected from dust &c. The attaching end of the casing is substan-
tially flush with the outer surface of the tire, and the valve is therefore not
exposed to injury, as are the external valves in general use.
Hitherto the valve has been passed through an opening in the wheel-rim and
in some cases fastened to the rim as well as the tire. In case the tire is stripped
from the rim, the valve, owing to its arrangement in the rim, restrains or prevents
the detachment of the tire at this point, causing the tire to be torn from the
valve and usually producing so large a rent therein as to render it unserviceable.
By supporting the valve entirely separate from the wheel-rim, in the manner
above described, the valve and tire always remain intact, and all danger of tearing
the valve out of the tire is obviated.
dd represent valve-seats, preferably of conical form, arranged at opposite ends
of the valve-case C, and e el are correspondingly-shaped valves applied to said
seats. The inner valve e is arranged to open inwardly and the outer valve e¹
outwardly and the two valves are connected by an elastic valve stem or connect-
ing f, extending loosely through the bore of the valve case. The valves and the

page_text: elastic connection f are preferably formed of a single piece of soft rubber. The
elastic valve stem f is stretched or distended in the closed position of the valves,
so that the stem tends constantly to draw both valves towards each other and
close the same against their seats. For this purpose, the valve stem in its con-
tracted or unstretched condition is somewhat shorter than the distance between
the inner ends of the valve seats d d. The stem and valves are introduced into
the valve case by compressing the same sufficiently to enter the case.
This may
be done by means of a pair of pliers, such as are commonly used for introducing
a plug into a punctured tire.
In inflating the tire, the outer valve d' is compressed on one side or separated
from its valve seat to form an inlet passage for the air. To facilitate this opera-
tion, the nozzle of the air pump G may be provided with a cup g which is placed
over the inlet end of the valve-case and which has a forwardly projecting pin g
which is inserted between the outer valve and its seat, as shown in Figure 2.
The air entering the valve case passes between the latter and the valve stem f,
forces the inner valve e from its seat and enters the tire, the elasticity of the stem
permitting the air to unseat said valve. During the return stroke of the pump-
piston, the inner valve is closed by the air pressure within the tire, assisted by
the reaction of the distended valve-stem. Upon withdrawing the pin g', the
outer valve e¹ expands and closes the adjacent end of the case, thus forming a
reliable air seal at both ends of the valve.
The tire may be deflected by passing a pin of sufficient length between the
case and the valve-stem and pushing the inner valve from its seat.
The case C, like the valves e el and their connecting-stem, is preferably made
of soft rubber, and its attaching flanges c c¹ are formed integrally therewith. By
this construction the valve comprises but two parts and can be produced at corre-
spondingly small cost. The valve is, moreover, wholly free from screw threads
or similar joints through which air is liable to leak.
The flexible construction of the entire valve is also advantageous in connection
with its internal arrangement, as it permits the valve to yield in case the tread
of the tire should bear against the same by reason of a partial deflation of the
tire, thus guarding against breakage of the valve.
It is obvious that the internal arrangement of the valve is applicable to any
tire-valve, irrespective of its particular construction or the material of which it
is made, and also that the construction of the valve herein shown and described
is applicable to an outside as well as an inside valve.
If desired, a spiral spring f may be used as the elastic connection between the
two valves ce¹, in place of the rubber valve stem, as shown in Figure 4. The
valves may also be applied to a metal case as shown in Figure 5.
In this case the bore is formed with seats at the opposite end portions, the
outer one being preferably recessed within the tube at a sufficient distance from
the end to permit interior connection for pump and screw-cap. The bore fer-
minates at the seat or shoulder with the opening thereto elongated, whereby the
enlarged end of the valve stem is retained in position, while allowing free passage
for the air to enter. Figure 6 is a sectional plan at 4-4 and Figure 7 is a
screw-cap.
I claim as my invention:-
:-
1. The combination with a continuous valve tube or casing having a continuous
bore extending from end to end and having at both ends of said bore valve-seats
which face in opposite directions, of valves arranged against the outer sides of
said seats and each capable of moving toward and from its seat, and an elastic
connecting-stem arranged in said bore and holding both valves against their
seats while permitting each valve, to rise independently from its seat, substan-
tially as set forth.
2. The combination with a pneumatic tire, of a continuous flexible valve tube
or casing secured at its outer end to the tire and projecting into the latter and
having a continuous bore extending from end to end and having at both ends of

page_text: said bore valve seats which face in opposite directions, valves arranged against
the outer sides of said seats and each capable of moving toward and from its
seat, and an elastic connecting-stem arranged in said bore and holding both
valves against their seats while permitting each valve to rise independently from
its seat, substantially as set forth.
3. The combination with a pneumatic tire, of a rubber valve case arranged
within the tire and provided at its outer end with integral rubber flanges attached
to opposite sides of the tire, substantially as set forth.
4. The combination with a tube or casing having a continuous bore. and having
at the inner end of said bore a valve seat which faces inwardly, and a seat or
shoulder at the outer portion which faces outwardly, and having the said bore
terminate at the said shoulder in an elongated channel, and, an elastic connecting
stem arranged in said bore, having integrally formed therewith a valve at the
inner end which seats against the said valve seat, and an enlargement at the
outer end which seats against the said shoulder at the outer portion, and a screw-
cap arranged for closing the outer end of the said valve case, substantially as
set forth.
I, EDWARD FORBES PICKETT, of 324, Bird Avenue, Buffalo, County of Erie,
State of New York, U.S.A., Draftsman, 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 a valve designed more especially for pneumatic tires.
One of the objects of my invention is the production of a reliable valve which
comprises a minimum number of parts and which can be manufactured at small
cost. The invention has the further objects to protect the valve from dust &c.,
and to so attach the same to the tire that it does not act to retain the latter upon
the wheel rim in the event of the tire being stripped therefrom, thus avoiding
injury or destruction of the tire.
In order that this invention may be the better understood I now proceed to
describe the same with reference to the drawings accompanying the Provisional
Specification and to the letters and figures marked thereon.
Figure 1 is a longitudinal section of my improved valve applied to a pneumatic
tyre. Figure 2 is a similar view showing the manner of forcing air through the
valve. Figure 3 is a cross section of the valve in line 3-3, Figure 1. Figures 4
and 5 are longitudinal sections each showing a modified construction of the valve.
Like letters of reference refer to like parts in the several figures.
A is the pneumatic tire of any suitable construction and B a wheel rim to
which the tire is applied.
C is the outer tube or casing of my improved valve which is preferably arranged
within the hollow tire and attached at its outer end solely to the tire, so as to be
entirely independent of the rim. This internal valve-case is preferably attached
to one side of the tire, as shown in the drawing, and is provided on its outer
portion with attaching flanges or collars, c, c¹ which are secured to the inner and
outer surfaces of the tire by cement or other suitable means, the tire having an
opening for the passage of the valve-case. This valve-case extends from its
attached end inwardly into the chamber of the tire, and is thus enclosed by the

page_text: tire and protected from dust &c. The attaching end of the casing is substan-
tially flush with the outer surface of the tire, and the valve is therefore not
exposed to injury, as are the external valves in general use.
Hitherto the valve has been passed through an opening in the wheel-rim and
in some cases fastened to the rim as well as the tire. In case the tire is stripped
from the rim, the valve, owing to its arrangement in the rim, restrains. or prevents
the detachment of the tire at this point, causing the tire to be torn from the
valve and usually producing so large a rent therein as to render it unserviceable.
By supporting the valvo entirely separate from the wheel rim, in the manner
above described the valve and tire always remain intact, and all danger of tearing
the valve out of the tire is obviated.
dd' represent valve seats, preferably of conical form, arranged at opposite ends
of the valve-case C, and e e¹ are correspondingly-shaped valves applied to said
seats. The inner valve e is arranged to open inwardly and the outer valve e¹
outwardly and the two valves are connected by an elastic valve stem connect-
ing f, extending loosely through the bore of the valve case. The valves and the
elastic connection f are preferably formed of a single piece of soft rubber. The
elastic valve stem f is stretched or distended in the closed position of the valves,
so that the stem tends constantly to draw both valves towards each other, and
close the same against their seats. For this purpose, the valve stem in its con-
tracted or unstretched condition is somewhat shorter than the distance between
the inner ends of the valve seats d, d¹. The stem and valves are introduced into
This may
the valve case by compressing the same sufficiently to enter the case.
be done by means of a pair of pliers, such as are commonly used for introducing
a plug into a punctured tire.
In inflating the tire, the outer valve e¹ is compressed on one side or separated
from its valve seat to form an inlet passage for the air. To facilitate this opera-
tion, the nozzle of the air pump G may be provided with a cup g which is placed
over the inlet end of the valve case and which has a forwardly projecting pin gl
which is inserted between the outer valve and its seat, as shown in Figure 2.
The air entering the valve case passes between the latter and the valve stem f,
forces the inner valve e from its seat and enters the tire, the elasticity of the stem
permitting the air to unseat said valve. During the return stroke of the pump-
piston, the inner valve is closed by the air pressure within the tire, assisted by
the reaction of the distended valve-stem. Upon withdrawing the pin gl the
outer valve el expands and closes the adjacent end of the case thus forming a
reliable air seal at both ends of the valve.
The tire may be deflected by passing a pin of sufficient length between the
case and the valve-stem and pushing the inner valve from its seat.
The case C, like the valves el and their connecting-stem, is preferably made
of soft rubber, and its attaching flanges c, c', are formed integrally therewith. By
this construction the valve comprises but two parts and can be produced at corre-
spondingly small cost. The valve is, moreover, wholly free from screw threads
or similar joints through which air is liable to leak.
The flexible construction of the entire valve is also advantageous in connection
with its integral arrangement, as permits the valve to yield in case the tread
of the tire should bear against the same by reason of a partial deflation of the
tire, thus guarding against breakage of the valve.
It is obvious that the internal arrangement of the valve is applicable to any
tire-valve, irrespective of its particular construction or the material of which it
is made, and also that the construction of the valve herein shown and described
is applicable to an outside as well as an inside valve.
If desired, a spiral spring f may be used as the clastic connection between the
two valves e el in place of the rubber valve stem, as shown in Figure 4. The
valves may also be applied to a metal case as shown in Figure 5.
In this case the hore is formed with seats at the opposite end portions, the
outer one being preferably recessed within the tube at a sufficient distance from

page_text: the end to permit interior connection for pump and screw cap. The bore ter-
minates at the seat or shoulder with the opening thereto elongated, whereby the
enlarged end of the valve stem is retained in position, while allowing free passage
for the air to enter. Figure 6 is a sectional plan at 44 and Figure 7 is a
screw cap.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is -
1. The combination with a continuous valve tube or casing having a continuous
bore extending from end to end and having at both ends of said bora valve-seats
which face in opposite directions, of valves arranged against the outer sides of
said seats and each capable of moving toward and from its seat, and an elastic
connecting-stem arranged in said bore and holding both valves against their
seats while permitting each valve, to rise independently from its seat, substan-
tially as set forth.
2. The combination with a pneumatic tire, of a continuous flexible valve tube
or casing secured at its outer end to the tire and projecting into the latter and
having a continuous bore extending from end to end and having at both ends of
said bore valve-seats which face in opposite directions, valves arranged against
the outer sides of said seats and each capable of moving toward and from its
seat, and an elastic connecting-stem arranged in said bore and holding both
valves against their seats while permitting each valve to rise independently from
its seat, substantially as set forth.
3. The combination with a pneumatic tire, of a rubber valve case arranged
within the tire and provided at its outer end with integral rubber flanges attached
to opposite sides of the tire, substantially as set forth.
4. The combination with a tube or casing having a continuous bore, and having
at the inner end of said bore a valve seat which faces inwardly, and a seat or
shoulder at the outer portion which faces outwardly, and having the said bore
terminate at the said shoulder in an elongated channel, and an elastic connecting
stem arranged in said bore, having integrally formed therewith a valve at the
inner end which seats against the said valve seat, and an enlargement at the
outer end which seats against the said shoulder at the outer portion, and a screw
cap arranged for closing the outer end of the said valve case, substantially as
set forth.
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