Improvements in Tire and other Valves.
Year: 1897

page_text: Date of Application, 24th July, 1897
Improvements in Tire and other Valves.
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, Manu-
facturer, do hereby declare the nature of the said invention to be as follows:-
This invention relates to pneumatic valves, and aims to provide improvements
in the type of valves in which a member carrying a rubber tube as a valve
proper, is clamped into a tube or valve casing which in turn is clamped to the
tire. In this type of valve it has been customary to form the metal valve casing
with a tapering socket, and the valve tube with a tapering body over which
the rubber pipe constituting the valve proper has been fastened, so that this
pipe would be compressed between the valve casing and valve tube by the union
coupling them together, and would thereby serve as a packing washer at this
joint, as well as a valve proper at its inner end. This compression of the rubber
pipe is liable to distort it, interfering with its action as a valve proper, and further
it soon destroys the pipe, which is necessarily of thin pure rubber, and quickly
cements itself to the metal surfaces.
My invention provides a distinct packing washer for the joint between the
metal valve casing and the valve tube, and a separate rubber pipe for the valve
proper, so that the pipe has simply its normal function to perform, and the
packing ring can be of suitable proportions and material to withstand the strains
of its service. To this end I terminate the rubber pipe inwardly of the joint,
and provide a separate ring, preferably in a groove around the valve tube, at the
point where the joint is to be made between the valve tube and the valve
casing.
In the accompanying drawings,
and
Fig. 1 is an axial section of a valve provided with my present improvements;
Fig. 2 is a side elevation of the valve tube thereof.
Referring to the drawings, let A represent a valve casing, B a valve tube,
C a union coupling the two together, I a pneumatic tire, and E a nut screwing
on the valve casing and clamping the valve to the tire by compressing the tire
between the nut E and the flange F on the valve casing.
The casing A is of ordinary construction, being of the class which is externally
screwthreaded, and has a tapering socket a at its outer end leading to a smaller
socket passing through it and communicating with the interior of the tire. A
notch c extends inwardly at each side of the casing to receive a wing d on the
valve tube.
The valve tube has the usual tubular conduit e leading through it to near its
inner end, and terminating in a lateral opening f formed in a cylindrical exten-
sion J the end of which is closed by a plug h, over which extension is stretched
a rubber pipe G, which acts as a valve proper as usual. The tube B has 'the
ordinary enlargement i fitting the tapering socket a, and above the wings dit
077

page_text: has a shoulder j, on which bears the flange k of the union C. This union is
preferably swivelled to the valve tube by an additional flange 7 on the latter,
which overhangs the union and prevents its escape. Beyond this flange the end
of the valve tube is screwthreaded to form a nipple m, to which a cap or pump
coupling can be applied.
According to one feature of improvement I make the rubber pipe G a short
independent pipe, confined on the extension by the head or projection h at
the lower end, and the enlargement i at the upper end, or held thereon in any
other suitable way, so that this pipe is adapted solely for performing its function
as a valve proper. According to another feature of improvement, I provide a
separate packing ring H around the valve tube B, preferably forming the tube
with a groove I surrounding its enlargement i, into which this ring is sprung. This
ring is compressed between the walls of the tube and the tapering walls of the
socket a, and makes a tight joint at this point. The pipe G and the washer H
are independent in all respects, and either can be renewed indepen-
dently of the other. The tube B with the pipe. G and washer H
constitutes an independent article of manufacture, with or without the coupling
attached to it, and can be sold separately for application by any ordinary person to
any valve casing A.
1.
Improvements in Tire and other Valves.
I, GEORGE HERMAN FERDINAND SCHRADER, of Number 30, Rose Street, New York
City, in the County and State of New York, United States of America, Manu-
facturer, 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 pneumatic valves, and aims to provide improvements
in the type of valves in which a member carrying a rubber tube as a valve
proper, is clamped into a tube or valve casing, which in turn is clamped to the
tire. In this type of valve it has been customary to form the metal valve casing
with a tapering socket, and the valve tube with a tapering body over which
the rubber pipe constituting the valve proper has been fastened, so that this
pipe would be compressed between the valve casing and valve tube by the union
coupling them together, and would thereby serve as a packing washer at this
joint, as well as a valve proper at its inner end. This compression of the rubber
pipe is liable to distort it, interfering with its action as a valve proper, and further
it soon destroys the pipe, which is necessarily of-thin pure rubber, and quickly
cements itself to the metal surfaces.
My invention provides a distinct packing washer for the joint between the
metal valve casing and the valve tube, and a separate rubber pipe for the valve
proper, so that the pipe has simply its normal function to perform, and the
packing ring can be of suitable proportions and material to withstand the strains
of its service. To this end I terminate the rubber pipe inwardly of the joint,
and provide a separate ring, preferably in a groove around the valve tube, at the
point where the joint is to be made between the valve tube and the valve
casing.
In the drawings left with the provisional specification,

page_text: and
Fig. 1 is an axial section of a valve provided with my present improvements ;
Fig. 2 is a side elevation of the valve tube thereof.
Referring to the said drawings, let A represent a valve casing, B a valve tube,
C a union coupling the two together, D a pneumatic tire, and E a nut screwing
on the valve casing and clamping the valve to the tire by compressing the tire
between the nut E and the flange F on the valve casing.
The casing A is of ordinary construction, being of the class which is externally
screwthreaded, and has a tapering socket a at its outer end leading to a smaller
socket passing through it and communicating with the interior of the tire. A
notch c extends inwardly at each side of the casing to receive a wing d on the
valve tube.
The valve tube has the usual tubular conduit e leading through it to near its
inner end, and terminating in a lateral opening f formed in a cylindrical exten-
sion g, the end of which is closed by a plug h, over which extension is stretched
a rubber pipe G, which acts as a valve proper as usual. The tube B has the
ordinary enlargement fitting the tapering socket a, and above the wings d it
has a shoulder j, on which bears the flange k of the union C. This union is
preferably swivelled to the valve tube by an additional flange 7 on the latter,
which overhangs the union and prevents its escape. Beyond this flange the end
of the valve tube is screwthreaded to form a nipple m, to which a cap or pump
coupling can be applied.
According to one feature of improvement I make the rubber pipe G a short
independent pipe, confined on the extension by the head or projection h at
the lower end, and the enlargement i at the upper end, or held thereon in any
other suitable way, so that this pipe is adapted solely for performing its function
as a valve proper. According to another feature of improvement, I provide a
separate packing ring H around the valve tube B, preferably forming the tube
with a groove I surrounding its enlargement i, into which the ring is sprung. This
ring is compressed between the walls of the tube and the tapering walls of the
socket a, and makes a tight joint at this point. The pipe G and the washer H
are independent in all respects, and either can be renewed indepen-
dently of the other. The tube B with the pipe G and washer H
constitutes an independent article of manufacture, with or without the coupling
attached to it, and can be sold separately for application by any ordinary person to
any valve casing A.
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. In pneumatic tire valves and the like, a valve member adapted to fit into a
valve casing of the class which can be clamped to a tire, consisting of a tubular
member having a perforated tubular portion adapted to pass in the valve casing,
in combination with a packing washer surrounding the tubular member for
making a leaktight joint between its outer face and the inner face of the valve.
casing, and a separate elastic pipe surrounding the perforated inner end of such
member and closing the perforation thereof against egress of air, while yielding
to permit ingress flow therethrough, substantially as described.
2. For tire and other valves, a valve member consisting of a tubular body
adapted to fit into a valve casing or valve shell, having an external groove sur-
rounding its inner end, and a tubular projection inwardly of said groove, a
packing washer seating in said groove for making a leaktight joint with such
casing or shell, and a separate flexible rubber pipe surrounding the inner end of
said member, acting as the valve proper thereon substantially as described.
3. In tire and other valves, a tubular member having a tapering portion for
fitting in a valve casing or valve shell, a packing washer surrounding such portion,
a separate flexible rubber tube carried by said member and acting as a valve proper

page_text: for controlling outflow therethrough, in combination with a union swivelled on
said member for coupling it to a valve casing or shell substantially as described....
4. The improved tire or like valve consisting of a valve casing or valve shell A
having a tapering socket a, in combination with a valve tube B, a packing washer H
compressed between the valve casing and valve tube to make a leaktight joint,
a separate flexible rubber pipe G preventing outflow through the valve tube, and a
screwthreaded connection between the valve casing and valve tube, substantially as
described and shown.
5. The improved valve member consisting of a valve tube B having a groove I
for a packing washer on its inner portion, a tubular inner extension g and inner
head, in combination with a packing washer H in the groove, and a flexible
pipe G surrounding said extension substantially as described and shown.
Dated this 14th dove of Anvil 1908
J. C. MEWBURN & ELLIS,
55 and 56, Chancery Lane, London, Chartered Patent Agents.