Improvements in the Method of and Apparatus for Inflating Pneumatic Tyres and other Articles.
Year: 1898

page_text: Date of Application, 8th Aug., 1898-Accepted, 8th Oct., 1898
COMIDDIN DIUITIATION.
Improvements in the Method of and Apparatus for Inflating
Pneumatic Tyres and other Articles.
I, BERNHARD FROHLICH, of 7 and 9, Constantinstrasse, Reudnitz, near Liepzig,
in the German Empire, Engineer, 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 method of and apparatus for inflating pneumatic
tyres in an easy manner and without any loss of time.
In carrying this invention into effect a suitable casing containing a highly
compressed gas is attached to the tyre valve and is placed in communication with
the air tube. The latter thus becomes immediately inflated. The casing or
reservoir for the compressed gas is preferably of such a shape that it may be
easily carried in the pocket or in the valise and is provided with an outlet valve
which closes when the casing is removed from the tyre valve.
The apparatus employed is illustrated in the accompanying drawings, of which
Figure 1 illustrates a longitudinal section through the casing or reservoir for
the compressed gas.
Figure 2 represents the casing attached to the tyre valve, but before com-
munication is established with the interior of the air tube.
Figure 3 is an illustration of the casing and tyre when communication has
been opened between them.
a is the casing or reservoir for containing the compressed gas, and it is provided
with an outlet b which is normally closed by a spring controlled valve e resting
upon the seating e. d is the spring for moving the valve towards its seat.
Any suitable gas may be employed for charging the reservoir and finally
inflating the tyre, but it is preferred to use carbonic acid gas.
a
The casing a may be filled with the compressed gas in the following manner.
The nozzle is screwed into the tank containing the compressed carbonic acid
gas, and the screw g at the other end of the casing is removed. Should the tap
controlling the tank outlet be now opened the gas will blow through the casing
and escape by the outlet g¹. When all the air has been removed from the casing
the outlet g is again closed by means of the screw 9, and the casing becomes
charged with gas at the same pressure as that contained within the tank. The
tank outlet may now be closed and the casing be removed, whereupon the valve c,
under the action of pressure and the spring d closes the outlet b. The casing is
now ready for use.
The tyre k is inflated by screwing the casing upon the stem of the tyre valve h
as represented in Figures 2 and 3 of the drawings. The valve c is furnished with
a projecting pin or the like i which finally abuts against the stem of the valve,
and, upon the casing being further screwed into place, raises the valve c from
its seat as represented in Figure 3. Communication is thus established between
the interiors of the casing and the air tube, and gas flows from the former into
the latter until the inflation is completed to the desired pressure.

page_text: When the casing is removed from the tyre valve the valve c automatically closes
the outlet b.
Experiments have shewn that a casing charged with carbonic acid gas and of
about the same size as an ordinary inflator, will enable a tyre to be charged from
thirteen to fifteen times.
The method and apparatus described may, of course, be employed for inflating
other articles than tyres.
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. The herein before described method of inflating pneumatic tyres, which con-
sists in charging a suitable casing with a highly compressed gas, and inflating
the tyre by connecting the casing with the air tube, substantially as and in the
manner herein before described with reference to the accompanying drawings.
2. An apparatus for inflating pneumatic tyres consisting of a suitable casing
or reservoir, constructed arranged and operated substantially as hereinbefore
described and as illustrated by the accompanying drawings.
Dated this 6th day of August A.D. 1898.
W. E. HEYS & SON,
Agents for the Applicant.