Improvements in Valves for Pneumatic Tyres.
Year: 1893

page_text: Date of Application, 13th Sept., 1893
Complete Specification Left. 13th June, 1894-Accepted, 14th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pneumatic Tyres.
I, MARCEL LEJEUNE, of 146, Boulevard Montparnape, Paris, in the Republic
of France, Mechanic, do hereby declare the nature of this invention to be as
follows:
:-
This invention relates to Improvements in Valves for Pneumatic Tyres and has
for its object to provide means which will obviate the use of a special kind of
pump.
To this end my improved valve consists of a valve body in which is rendered
adjustable a bush having a milled shoulder. In this bush is arranged a valve stem
having a screwed end which may be drawn down or released by means of a nut on
the same and the lower extremity of which screwed end has a head which prevents
the said nut from leaving its stem. The upper end of the said stem is formed with
a head and below the same with a shoulder, between which is employed a rubber
tube, the air being permitted to pass around the said tube. When the said rubber
tube is away from the upper edge of the said bush the air is permitted to pass
around the said tube, whilst when resting on the said edge it forms a safety valve.
The valve can be lifted off its seat by pushing against the head of the valve stem.
On the said nut being turned in one direction and abuting against the lower end
of the bush it withdraws the said valve stem, brings the said rubber tube against
the seat and expands it in diameter against the interior of the said bush and thus
cuts off the escape of air entirely.
On turning the aforesaid nut in the opposite direction the said rubber tube is
permitted to assume its normal form and position and facilitates the admittance of
air to the tyre.
F. BOSSHARDT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements in Valves for Pneumatic Tyres.
I, MARCEL LEJEUNE, of 146 Boulevard Montparnape, Paris, in the Republic
of France, Mechanic, 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 object of this invention is a special construction of a valve, permitting of
easy separation of its parts for cleaning or other purpose.
In the annexed drawing,
Fig. 1 is an exterior view of the valve (closed).
Fig. 2 vertical section of the valve (open).
Fig. 3 vertical section of the valve (closed).
Fig. 4 vertical section of another arrangement of valve.
Figs. 5 and 6 two modifications on the same principle.
As will be seen from Figs. 1 and 2 the valve is composed of a valve-body A.
Into this valve-body A a sleeve B is fitted by screw-thread having toward its
middle a milled collar b.

page_text: In this sleeve a rod C with puppet-valve c is freely placed. This rod can be
retracted to a sufficient distance by means of a driving nut D, arranged on the
threaded part of the aforementioned rod. C. The lower extremity of this rod
forms a head e, serving to prevent the nut D from entirely leaving the threaded
portion.
Referring to Figs. 1 and 2 it will be seen that the air is allowed to freely
pass either through the end of the sleeve B or through the cuts made therein,
when the end is closed by the retracting-nut; the air then passes around the
caout-chouc tube c maintained above by a triangular head f and below by a small
projection made around the rod C. In Figure 2 the tube c resting on the upper
rims of the sleeve B forms a puppet valve. For discharging, it is sufficient to
press upon the extremity of the rod so as to lift the tube c from its seat.
Referring then to the Figures 1 and 3 the return-nut D may be screwed
sufficiently onto the rod C, in order that this latter, being shortened, may exert a
pressure upon the caout-chouc tube c, which latter by the increase of its diameter
produces an absolutely tight closure and thus prevents any loss of air.
To open the valve it is sufficient to unscrew the retracting-nut D in order that
the tube c may close to the rod C taking up its point of support on the small
projection which this rod carries.
One of the advantages of this valve lies in the easy dismountability of the
sleeve which needs only to be unscrewed a few turns in order to enable the valve
to be lifted out when cleaning etc., is necessary.
Fig. 4 shows an arrangement of valve based on the same principle; in this
figure the puppet-valve F being arranged at the top of the valve body A, is lifted
for discharging by the rod C, carrying at one extremity the washer with central
projection and at the other extremity a collar or washer m. Between these
washers and m, the tube c is arranged, which under the pressure of the nut D
becomes enlarged and thus prevents any escape of air, which may have passed the
upper valve F. The screw-nut D being unscrewed the tube c takes the position
shown in Fig. 2.
Figures 5 and 6 illustrate modifications in which the tubes c are pressed either
by a small screw-nut (Fig. 5) or by the stoppers with inner screw-thread ;
these appliances are fitted like the preceding ones in a valve-body, such as
represented in the preceding figures.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. An improved pneumatic valve, consisting of a valve-body carrying inside a
threaded sleeve through which passes a rod, retaining between itself and the sleeve
a caout-chouc tube, which becomes distended and acts as a puppet-valve and
stopper when the central rod or tube is retracted from inside by means of a nut.
2. A valve body having a valve F and a rod C for displacing said valve, the
said rod having a distending sleeve of rubber for the purpose and substantially as
set forth with reference to Figures 1 to 6.
Dated this 13th dow of June 1901
R. HADDAN,
Of the Firm of Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, W.C., Agent to Applicant.