Improvements in Self Closing Valves for Use in Inflating Pneumatic Tyres.
Year: 1899

page_text: Date of Application, 24th Mar., 1899- Accepted, 2nd June, 1899
COMPLETE SPECIFICATION.
Improvements in Self Closing Valves for Use in Inflating Pneumatic
Tyres.
We, GASTON EDWARD CORDEAU, Manufacturer, of 1060, Jefferson Avenue, Brook-
lyn, New York, United States of America, and GEORGE FRANCIS WILSON, Manu-
facturer, of 47, Great Jones Street, New York City, United States of America, do
hereby declare the nature of our invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
Our invention relates to improvements in self-closing valves for air, adapted to
be secured in the end of a pipe or flexible hose connected with a storage tank con-
taining compressed air, the object being to prevent its escape when the valve is
not in use for inflating tires for pneumatic vehicles.
To fully explain our invention, we refer to the accompanying drawing which
forins part of this specification in which
Fig. 1 is a longitudinal sectional view through the centre of our improved self-
closing valve, the valve being closed.
Fig. 2 is a cross section of Fig. 1 through line X X.
Fig. 3 shows the valve and stem in operation, open for the passage of air, the
body being shown in section. The arrows show the direction of air.
Similar letters of reference refer to similar parts in the several views.
A is the body of the self-closing valve made of brass or other suitable metal;
a hole is drilled lengthwise through the centre to act as a guide for the tubular
valve stem B and to retain the same in position. At the upper end the hole
in the body is enlarged so as to form a chamber 1 for the enclosing of a spiral
spring 2, and a disc valve 3; at the bottom of this upper chamber an annular
seat 4 is provided upon which the upper valve closes. A chamber 5 for the lower
valve is provided as shown.
It will be noticed that the valve is a double one, sliding within the body or
casing shell, the air being shut off at the top when not in use for inflating
pneumatic tires and closed off by the lower valve between the flange and the body
to avoid leakage of air at that point when in use for inflating.
The valve is composed of a tubular extension B closed at the top, having a
flange 6 at the lower end which may be provided with several steps 7 for the pur-
pose of securely holding a soft rubber cone 8 in place. A washer 9 is placed above
the flange, to make an air tight joint between the flange and the body when pres-
sure is brought to bear against the cone as shown in Fig. 3.
A slot 10 is milled or filed across the upper end of the tubular extension B,
close up under the disc valve 3, so as to afford a passage for air into the tubular stem.
A disc valve is secured on the upper end of the tubular extension, a thin washer 11
of leather, fibre or rubber being placed upon the tube under the disc to make an
air tight joint when the spiral spring or the air pressure within the hose presses
down on the disc as shown in Fig. 1. The area of this disc being many times
greater than the area of the hole through the stem B, the air pressure in the hose

page_text: above the disc will keep upper valve closed without the use or need of any addi-
tional power, such as a spring would afford.
A hose nipple C is screwed down on the upper end of the body as shown.
By forming a cavity or chamber 5 at the lower end of the body, the valve is pro-
tected by an annular wall 12 so that it cannot be tampered with by a knife or any
other tool, and so that when dropped on a hard floor, such as a stone side-walk,
the valve will not be bruised or injured. Such being the construction, the opera-
tion is as follows::
When the tube D is connected with a storage tank containing compressed air,
the air pressure within the hose as well as the spiral spring will keep the upper
valve closed.
To inflate a tire, the rubber cone is pressed down upon the tire nipple E, the
body or casing A being held in the hand, this action tending to press the valve
and its stem inward, raising the upper valve from its seat. The air passes through
the hole or slot 10 down through the tubular stem and into the tire nipple, the
soft rubber cone preventing its escape between itself and the nipple, and the
washer 9 above the flange being seated against the roof or seat of the lower cham-
ber prevents on escape of air at that point. When the desired quantity of air or
pressure is attained in the tire, the downward pressure on the body is relinquished,
when the air pressure within the hose above the valve and the resiliency of the
spiral spring automatically closes off the air.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1st. In a self-closing valve for air the combination of a body having a longitu-
dinal passage way through the center, and an enlarged valve chamber at both
its upper and lower end, of a tubular valve stem having a sliding movement within_
said nassage way, the said tubular stem being closed at its upper end and having
an orifice under the upper valve for the admission of air, an upper and a lower
disc valve, the lower valve being provided on its outer face with a hollow cone of
soft rubber substantially as shown and described.
2nd. In a self-closing valve for air, the combination of a body A and a double
acting sliding valve, composed of an upper and a lower disc valve, a tubular stem B
closed at its upper end. having an orifice as 10 for the admission of air with a soft
rubber cone, positioned below the lower valve, the said double acting valve being
limited in its movement by an upper and a lower valve seat within the enlarged
valve chambers, substantially as shown and described.
3rd. In a self-closing valve for air the combination of a hody A of a double
acting valve composed of an upper and a lower disc valve oneratively connected
together by a tubular valve stem B having an opening as 10 therein below the
upper valve, a spiral spring enclosed within the upper chamber of said body, the
said body having its lower valve chamber recessed so as to leave an annular wall 12
for the purpose specified.
4th. In a self-closing valve for air a body having an upper and a lower valve
chamber provided with annular seats, a passage way through the center of said
body whereby the upper and lower chambers are connected, an upper and a lower
dise valve united by a tubular stem which is closed at its unner end and having
an opening close up under the unner valve for the admission of air into the tubular
stem, a spiral spring enclosed within the unper chamber said spring pressing down
upon the upner dise valve and a soft rubber cone mounted upon and below the
lower dise valve substantially as shown and described.
5th. In a self-closing valve for air the combination of a body provided with an
upper and a lower valve chamber, a passage way drilled centrally through the body
connecting said upper and lower valve chambers, of a sliding tubular valve stem,
uniting an upper and a lower dise valve, said valves closing alternately upon seats

page_text: formed in the said upper and lower valve chambers, of a series of steps forming
part of the lower valve disc or flange upon which steps a soft rubber cone is
mounted all arranged substantially as shown and described.
Dated this 24th day of March 1899.
EDWARDS AND Co.,
Chartered Patent Agents,
65 and 66, Chancery Lane, London, Agents for the Applicants.