Improved Air Valve for Pneumatic Tyres, Cushions, and the like.
Year: 1898

page_text: Date of Application, 23rd Mar., 1898-Accepted, 4th June, 1898
COMPLETE SPECIFICATION.
Improved Air Valve for Pneumatic Tyres, Cushions, and the like.
I, GEORG MÜLLER, of No. 30, Wilhelmstrasse, Schwäb, Gmünd, in the Kingdom
of Wurtemberg, German Empire, 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 application relates to an improved valve for pneumatic wheel tyres,
air cushions, and the like, which distinguishes itself through its greater simplicity,
and extremely easy control.
My improved valve is illustrated in the accompanying drawing on a magnified
scale, and
Figure 1 shews the same in longitudinal section when in the closed position
after pumping up.
Figure 2 shews the position during the pumping.
Figure 3 shews the position during the back stroke of the pump piston.
Figure 4 shews a section on the line x-x, and Figures 5 to 9 shew details in
section.
In the cover piece a attached to the wheel rim, (as shewn in Figure 5) there
is arranged a fixed sleeve 6 which possesses a longitudinal slot 61 (Figure 4)
serving as an air channel, and also a cross slot 62. In the said sleeve 6 is placed
a valve body e (Fig. 6) provided with a valve rod c', the valve 3 whereof consists
of a little leather disc, and finds its seating on the inner part of a below the sleeve b,
whereas the rubber disc attached to the upper part of the valve body comes in
contact with the upper part of the sleeve b. If the valve body is set in the manner
shewn in Figure 1, then another sleeve d (Figure 7) is screwed into the upper
part of the cover piece a which piece d is provided with a perforation d², and is
moreover surmounted by an annular cap e (Figure 8) provided with a washer e¹.
Upon the threaded part of the piece d there is further screwed a closing cap f
(Figure 9) which cap is provided with a central bar f¹.
In Figure 1 all the parts are shewn in the closed position, after the pumping
of the air has been completed. It should be remarked that the valve is
usually not resting upon its seating, but remains depressed away from the same
by means of the washer 2 which acts like a spring. In the position shewn in
Figure 1 the valve is, however, pressed upon its seating, which is attained by the
action of the rod f¹ of the closing cap f screwed upon which acts upon the upper
part of the valve rod c¹ and thereby presses the valve upon its seating. The valve
then finds itself in front of the channel 62 whereby a complete hermetic closing is
assured.
The valve can also be pressed upon its seating in another manner, for instance,
by means of the upper part of the valve rod e¹ having been formed threaded, and
provided with a slot, so that the bar or the valve can be screwed fast upon its seat-
ing by means of a part of the cap f arranged in the form of a screw driver. When
it is desired to pump air in, the cap f is unscrewed, and the part is connected
to the air pump. In consequence of the screwing off of the cap f the valve c³ is
raised from its seat by means of the spring rubber washer c², so that the channel 6*

page_text: is opened, and air can pass into the tyre through the opening a¹ as shewn in
Figure 2 in the direction of the arrow. When the piston of the pump recedes
(Figure 3) any escape of air is prevented, because the air already in the tyre presses
from below against the valve c³, whereby the rubber disc c³ is pressed against the
under part of the piece d, and the air opening is closed. The valve is so con-
structed that it can at any time be easily taken apart and cleaned. The closing
of the opening a¹ is principally effected by means of the little leather disc c³ which
is fastened to the valve body by means of the rod c.
Repairs become entirely unnecessary in the case of this extremely easily
managed valve.
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:
The improved valve for pneumatic tyres, air cushions and the like, character-
ized by the arrangement of a valve cover (a) provided with a cover (b) having an
outer side air channel (162) and a rubber disc placed above the foregoing upon
the prolongation (c) of the closing valve (c), in such a manner that the same upon
the pressing of the valve body (c) on its seat by means of the closing cap (f) the
device will be pressed together, but springs upon the release of the cap, and
liberates the opening (a¹) to the tube; whilst when in the latter a surplus pressure
exists the same closes the exit opening (2) in the piece (d).
1000
Dated
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.