Improvements in Air Valves, especially applicable to Pneumatio Tires:
Year: 1896

page_text: Date of Application, 3rd Dec., 1896-Accepted, 20th Mar.. 1897
Improvements in Air Valves, especially applicable to Pneumatio
Tires:
I, GEORGE HERMAN FERDINAND SCHRADER, of No. 30 Rose Street, New
York City, in the County and State of New York, United States of America,
Manufacturer, do hereby declare the nature of the said 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 air valves especially applicable to pneumatic tires, and
aims to provide improvements in such valves and improved means for attaching
them to the tire.
The tire valves now used generally consist of a metal tube, clamped to the tire
either by passing through its wall or by passing into a small tube formed on the
tire, onto the end of which brass tube is fastened, by a screw coupling, a second
brass tube, between which and the first tube is placed a tube of rubber, which acts
as a valve to permit an inflow of air and prevent an outflow.
My invention provides an improved detachable tube containing within itself
improved valve mechanism, capable of being clamped to the usual metal tire tube,
and having a screwthreaded sleeve for this purpose and an annular washer for
making a tight joint when it is so clamped; the improved article constitutes a
complete valve member, which can be sold by itself, and applied to the tire tube
by any person.
In the accompanying drawings,
Fig. 1 is a side elevation of my improved valve, in position on a valve tube
clamped to a tire and wheel felly, the tire and felly being shown in cross section;
Fig. 2 is an axial section of the parts in the position shown in Fig. 1;
Fig. 3 is an axial section of the valve carrying tube, showing the improved
valve member partly in section thereon, and the valve in the open position;
Fig. 4 is a side elevation of the improved valve member before being applied to
the tire tube, the attaching sleeve and the cap being shown in section;
Fig. 5 is a view like Fig. 2 but showing a different form of valve and a different
form of tire tube;
Fig. 6 is a similar view showing another form of valve;
Figs. 7 and 8 are fragmentary sections showing a different means for holding the
spring in the valve member.
In the drawings A represents a pneumatic tire and B the felly or rim of a
bicycle or other wheel. C is the valve tube, which is clamped to the tire and
felly by its flange a and nuts b and c, and has a hollow interior e open at its outer
end, having a tapering conical face and one or more notches g in its end. D is
the improved valve member, which is fastened to the end of the tire tube C by a
screw threaded sleeve E, and carries at its outer end a protecting cap F.
My invention relates to the valve member D, which is improved in several
respects as compared to the device formerly used for this part of the valve, and
con prizes in itself a complete valve which can be applied to any tire tube C.
The preferred construction of the valve member D is shown in Figs. 1 to 4,
which I will now describe in detail. This member has a tubular body which at

page_text: its inner end has a tapering face h in which is formed an annular groove i, in which
groove is seated a packing ring G, which ring is tightly compressed against the
face of the tire tube when the valve member is forced in the latter as shown,
and makes a leak tight joint between these parts. Above the ring G the
member D bas ribs j sliding in the notches g to prevent turning of the member
in the tube C. Above the tube the member has a shoulder k which is engaged
by the internal shoulder 1 of the sleeve E, so that when this sleeve is screwed
down on the tube C it will force the member D into the tube and hold it therein.
Above the sleeve the member has another shoulder m which engages the shoulder/
of the sleeve to prevent separation of the sleeve from the member, and also
serves when the sleeve is unscrewed to engage the shoulder and cause the
member D to be forced out of the tube C with the unscrewing of the sleeve.
At its outer end the member D has the usual outer screwthread n, on which the
cap F is screwed to protect the valve against dust, and on which a pump coupling
may be screwed to pump air into the valve. This cap has a packing washer o, and
a loose metal washer p, held in the enlarged upper part of its interior for making
a tight joint with the upper end of the member D.
The valve member carries all the parts of the valve, having an internal seat H,
a narrow inlet g leading to this seat, a valve chamber r extending from the seat
inwardly, and a tubular plugs closing the inner end of the chamber. A valve
proper I in the chamber is free to move toward and from the seat to open and
close the valve and is held toward the seat by a spring K which is located between
the valve proper and the plugs, and is held in place by the tapering ends of these
which it partly surrounds. A deflating pin J lies loosely in the inlet q, having
an enlarged head at its inner end resting in an enlarged part of the inlet and
freely on the face of the valve so that the pin cannot escape. The valve I
consists of a solid rubber plug held in a solid cup shaped metal casing u.
The lower end of the valve member D is screwthreaded and the plug is screwed
into it.
In this construction the working parts of the valve are all securely enclosed in
the valve member and cannot be injured or lost, while all communication through
the valve must pass through this member by reason of the tight joint between it
and the tube C. The valve member can be removed at will by any ordinary
person, and replaced without danger of injury. To release the air without removing
the valve, it will only be necessary to unscrew and invert the cap F, and stick its
projecting pin inward against the pin J until the latter unseats the valve, as
shown in Fig. 3. As soon as this pin is released the valve will return to its seat.
"In the construction shown in Fig. 5 the parts are similar to those just described
except that the shoulder m is omitted, the lower end m' of the cap F being extended
near enough to the shoulder 1 of the sleeve E to prevent loss of this sleeve when
the cap is on the valve member D, and to enable the sleeve to be screwed up
against the cap so that the valve member can be pushed out of the tube C as the
sleeve is unscrewed. In this construction the deflating pin is also omitted, the
seat H being near the outer end of the member D, and the valve 1 being sufficiently
High to be moved by the finger of the cap, when the latter is inverted and pressed
into the inlet g, so that the valve can thus be unseated.
In the construction shown in Fig. 6, the parts are similar to those described as
to Fig. 5, except that the valve I is constructed with a fixed stem J which is
slightly enlarged at its upper end in the inlet g, and thereby permanently connects
the valve to the member D. The upper end of the stem J is within reach of the
finger of the cap F when this cap is inverted, so that by compressing the finger
in against the stem the valve 1 can be opened from its seat H. The plugs in this
case is a tapering plug and is held in place by being forced into the conical end of
the member D.
.
In Fig. 7 a pin is used instead of the plug, and in Fig. 8 a.flanges on the end
of the member D is turned in, both being used to hold the spring in the member.
The essence of my improvements is the providing a valve member with means

page_text: for making a tight joint with the tire tube independently of the valve proper, and
with valve mechanism which cannot be lost or injured, carried by the valve member.
independently of the coupling part of the latter, so that these valve members can
be sold for application by the users themselves to any tire tube C, and so that the
parts can be operated, without removing the valve member, to release the air, and
can be applied and removed without danger of injury.
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. A valve for pneumatic tires and like purposes, consisting of a tubular member
having an outer packing ring near its end for passing within and making a leak
tight joint with a tire tube, having a coupling sleeve for coupling it to said tube,
and carrying in itself a valve proper independently of said ring and coupling.
2. For pneumatic valves adapted to be applied to the socket of a tire tube or the-
like, a valve member having a valve proper, an independent packing ring, and a
coupling sleeve for coupling it to a tire tube.
3. A tire valve consisting of a tubular member adapted to be fastened in the
socket of a tire tube and having an internal valve chamber and seat, and a valve
proper enclosed in said chamber.
4. A tire valve adapted to be coupled to a tire tube and having a grooved and
tapering lower end, a coupling swivelled to it for fastening it to a tire tube, a valve
proper, a valve seat carried by said member, and a pin projecting through the latter
for deflating the valve.
5. For tire and other valves, the improved construction and arrangement of the
valve member substantially as described and as shown in Figs. 1 to 4 of the
drawings.
6. In tire valve members, the improved construction of valve member substantially
as shown in Fig. 5 of the drawings.
7. In tire valves, the improved construction of valve member substantially as.
shown in Fig. 6 of the drawings.
8. For tire valves, the valve proper I, having a solid rubber plug t enclosed in a.
cylindrical metal casing u.
9. For tire valves, a separate deflating pin J fastened in a valve shell D.
10. For tire valves, a valve I, having a stem J fastened in a valve shell D.
Dated the 3rd day of December 1896.
J. C. MEWBURN & ELLIS,
55 & 56 Chancery Lane, London, Chartered Patent Agents..