Improvements in Valves for Pneumatic Tyres and the like.
Year: 1895

page_text: Date of Application, 15th Oct., 1895
Complete Specification Left, 14th July, 1896-Accepted, 19th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pneumatic Tyres and the like.
I ADOLF HEERDT of 16 Rue des Rivageois, Liége in the Kingdom of Belgium,
Engineer do hereby declare the nature of this invention to be as follows:-
The present invention relates to an improved valve for all kinds of tyres or the
like filled with air, and especially for pneumatic cycle tyres.
This invention is especially designed to prevent (1) The loss of air which is an
ordinary feature of the systeins now in use. (2) The adhesion of the valve when
in a position of rest.
The body of the valve or its casing is a tube made of brass or any other suitable
material screw threaded on the exterior and provided with a flange at its inner end.
The tubular passage in this casing is largest at its exterior end and is twice reduced
in diameter thus forming two shoulders of which that nearer the inner end forms a
valve plug seating while that nearer the outer end forms a counter abutment for
the flange or the outer end of a flexible tube.
A second screw threaded tube provided with a flange turned to fit the interior
largest diameter of the casing at its outer cnd is fitted into the said outer end of
the casing by means of this Hange, and projects outwardly therefrom. This tube
or its flange thus serves to grip and hold a flange provided on the flexible or
caoutchouc tube in the inner end of which fits the stem of a valve or plug made of
ebonite or any other nonoxidizing material, the enlarged head of which is provided
with a cross groove and seats itself on the inner shoulder in the casing.
A perfect & close fixing of this flexible tube at its outer end is attained by means
of a cap screw engaging over the flange of the outer tube and screwing on to the
exterior of the casing where it is fixed with a locking nut.
The usual cap is screwed on the outer tube for the purpose of closing it.
The valve thus constituted is fixed in place by placing its flange in the air tube
of the tyre which is to be fitted with the improved valve, and by pressing afterwards
the washer with the help of the first nut down on the air tube. It is then passed
through the rim and secured by the second nut.
The parts of the valve being assembled it will be only necessary to remove the
cap and to apply the air pump to the tyre to inflate it.
The air blown into the flexible tube forces this tube to expand and to disengage
itself from the solid valve plug which permits the air to pass through the groove
in the plug into the air tube until the latter is completely inflated. The plug is
kept in place by its seating.
When the air tube is inflated the cap is screwed on again and the tyre is
perfectly secure against any loss of air through the valve since the pressure
working from the interior presses the plug into the orifice of the flexible tube and
the latter against the stem of the plug which added to the elasticity of the flexible
tube with its natural tendency to press upon the plug affords an absolutely
hermetical closing.
The flexible caoutchouc tube not being pressed constantly against a metallic
object its adhesion through oxydizing is not to be feared.
Dated this 15th day of October 1895.
HERBERT HADDAN & Co.,
Agents to Applicant,

page_text: Improvements in valves for Pneumatio Tyres and the like.
ADOLF HEERDT of Rue des Rivageois, No. 19, Lidge in the Kingdom of
Belgium Manufacturer 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:-
The present invention relates to an improved valve for all kinds of tires or the
like filled with air and especially for pneumatic eyele tires. The invention is
especially designed to prevent the loss or leakage of air which is an ordinary feature
of the systems now in use and also to prevent the adhesion of the valve when in a
position of rest.
In the improved valve I employ a tube or sleeve of resilient impervious material
such as indiarubber or enoutchouc and fit the same at one end upon a tubular
extension of that part of the valve to which the pump or inflator is usually attached,
while 1 fit into the other end of this said tube or sleeve a plug of a material that
does not adhere to or affect the tube or sleeve, for instance vulcanite, such plug
being detached from the valve body but having a seating at its unter end upon a
supporting flange or part of said valve body.
The annexed drawing is a longitudinal section showing the construction which
I prefer to give effect to the above invention.
A is a tube of valve holy, serew threaded on its outside, having at one end the
flange a and at a suitable place within it the shoulder A. represents the tire or
its inner tube, K the wheel rim, C a loose washer which is used to compress the
tire or tube against the flange a and is set up by the nut c. e is the exterior nut
securing the valve firmly in the rim K.
D) is a second tube screw threaded externally for the greater part of its length
and having a flange of the same diameter as the largest diameter at the end of
the tube A that is to say between its end and the shoulder in order to fit and
slide therein. Beyond said flange d the tube D is provided with a tubular
extension d' of small diameter on which is slid a tube of caoutchone E extending
beyond the end of the tube d and embracing at its other end a valve or plage of
ebonite or other unoxidisable material adapted to seat itself at its outer end loosely
upon the shoulder or equivalent part A and being so made, for instance by the
slot that air can pass freely when it is seated on said shoulder.
The tube E is provided with a bolster to lie in the space between the
flange and the shoulder A' and form an airtight closure at this end when the
collar is screwed tightly on the body A and presses the flanged into said
space is a set nut for the collar (i. II is the cap that is employed in the
known manner for closing the end of tube D.
The valve thus constituted is fixed in place by placing its flange a in the air tube
of the tire or the like which is to be fitted with the improved valve, and by pressing
afterwards the washer C with the help of the first nut down on the air tube. It
is then passed through the rim and secured by the second nut. The parts of the
valve being assembled, it will only be necessary to remove the cap 1 and screw on
in its place the air pump connection. The air blown into the flexible tube or
valve E enlarges the tube and disengages it from the valve or plug e so that the air
may pass between the tube E and the stem of plug e and out of the end of tube E
around the conical end of plug e if the plug is so provided, thence through the
slote and into the tire through orifice, while the plug e is resting against its
shoulder or bed A' in the valve boly A. When the tire is sufficiently inflated the
pump is disconnected and the cap if replaced. Loss of air is prevented, since the
pressure from the interior presses the plug into the tube E, presses the head of
plug e firmly into the mouth of tube E, and also surrounding the tube E presses the
1

page_text: latter firmly on to the stem of the plug e which coupled with the elasticity of the
tube E itself will give an hermetically close joint. Such pressure however will not
result in adhesion of the tube E since the tube where it is required to form the
valve is not pressed into contact with any metallic or oxidisable material.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed 1 declare that what [
claim is ;-
1. In a valve for pneumatic tires and the like the combination of the elastic tube
lodged in the body of the valve and having one extremity fitted or placed on a
part or extension of the inflation tube, with a plug or the like inserted in the other
extremity of the tube substantially as and for the purpose set forth.
2. In a valve for pneumatic tires and the like the combination with the elastic
tube E, of an extension of the inflation tube extending into one end of tube E, a
plug or the like extending into and adapted to close the other extremity of the
tube E and a support for said plug or the like in the body A of the valve for the
purpose set forth.
3. In a valve for pneumatic tires and the like, the combination with the elastic
tube E of a plug or the like adapted to enter the end of the tube substantially as
set forth, and having openings for the passage of air past the end of said plug,
together with a shoulder such as A' in the valve body A for support of said
plug for the purpose set forth.
4. In a valve for pneumatic tires and the like having a flexible valve tube E,
the construction of said tube with a bolster in combination with valve body
having a shoulder A² and an inflation tube having flange d for the tightening of
said tube substantially as set forth.
5. The construction of the valve for pneumatic tires and the like substantially
as herein described with reference to the drawings and for the purpose set forth.
Dated this 14th day of July 1896.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., England,
Agents to Applicant.