An Improved Non-return Valve, chiefly intended for Pneumatic Tyres.
Year: 1895

page_text: Date of Application, 2nd May, 1895-Accepted, 8th June. 1895
COMPLETE
SPECIFICATION.
An Improved Non-return Valve, chiefly intended for Pneumatic
Tyres.
I, HAVER HEINE, of the Firm of Haver Heine & Sohn of Voehrenbach,
i. Raden, in the Empire of Germany, Mechanician, 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 an improved non-return valve chiefly intended for use
with pneumatic tyres for velocipedes and other road vehicles but is also applicable
for other purposes.
This valve is distinguished by its very reliable action and most simple
construction which allows of its being easily detached in case of any repair being
required without necessitating the dismounting of other fixed parts of the tyre,
whereby injury to the indiarubber, which otherwise easily occurs, is obviated.
A further advantage of this improved valve is due to its possession of only one
single tightening plate, which can be very easily exchanged.
and
In the accompanying drawing this improved valve is illustrated;
Figure 1 showing the same in longitudinal section with the valve proper closed
Figure 2 showing a portion of the same in similar section with the valve proper
open.
cap
The sleeve or socket a which is provided with exterior screw threads, is fixed
to the rim of the wheel and to the indiarubber tyre by means of the disc k
integral with the sleeve, and the screw nuts in. Upon the said sleeve the h
with air inlet channel c is screwed and tightened by means of an inserted packing
ring of indiarubber, or other suitable material. The air inlet channel passes into
the packing ring and slightly projects through the said ring f into the socket, so
that said channel is closed by the cup valve 9, bearing under slight pressure against
the indiarubber ring f, by the medium of the spring, h.
It is evident that the joint packing ring can be easily removed after the cap h
is unscrewed and can be replaced by a new one.
Ր
When not in use the end of the channel is closed by means of a screwed on
protecting cap d whereby a greater security is obtained and at the same time any
dirt prevented from entering the valve.
When air is forced through the valve by the medium of an air pump screwed
upon the air inlet channel, this air forces the cup-valve g off its seat and is thus
enabled to enter, as indicated by the arrow in Figure 2, through the sleeve a into
the tyre.
When the pressure of the air pump ceases, the spring aided by the
air, compressed in the tyre, forces the cup valvey back against the indiarubber
packing ring so that any escape of the compressed air is prevented.
Thus the principal object of the spring his to produce a reliable closing of the
valve, whilst the tight closing proper obtained by the air pressure existing in
and acting from the interior of the tyre. The safety obtained is therefore a
double one and consequently a failure of the valve is practically impossible. But
the valve will act suficiently reliably without the spring / so that said spring may
under some circumstances be omitted.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. An improved non-return valve for hollow inflatable wheel-tyres the

page_text: characteristic feature of which is a cup valve (9) arranged immediately below the
air-inlet channel, which cup valve opens automatically when air is pumped in and
is closed by the interior pressure when the pumping action ceases; a slightly
acting spring being provided or not for increasing the reliability of action of the
valve (g) pressing against its seat.
2. A valve of the kind described in the first claim having a packing ring (f),
arranged in common for the cup valve y and the screwed on cap (b) the latter
being perforated to form the air inlet channel (c); the whole substantially as
described.
Dated this 2nd day of May 1895.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.