Improvements in Tire Valves.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Tire Valves.
I, GEORGE HERMAN FERDINAND SCHRADER, of No 30, Rose Street, in the City
of New York, United States of America, Manufacturer, do hereby declare the
nature of this invention to be as follows.―
This invention relates to pneumatic valves for tires
Such valves have been made with a flat-sided externally-screwthreaded shell
clamped to the tue and passing through the felly, to which shell a seat member
has been clamped by a coupling, the seat member canying the valve proper,
and being sciew threaded at its outer end to couple with an air pump for inflat-
ing the tire, and to be closed by a cap when in use To prevent the seat member
from 1otating in the shell, the shell has been notched, and the seat member has
had a lug projecting into this notch, and to make a tight joint between the
seat member and shell, a ubber packing has been placed inside of the shell
to be clamped between it and the seat member
My present invention aims to provide an improved construction for valves in
which the seat member is held on the end of the shell by a coupling, and to
this end I provide an improved construction for the shell and for the seat member
an improved valve plunger which is irremevably connected within the shell so
that it cannot be lost, a deflating pin which is removably connected to the
seat member so that it cannot be lost, and an improved construction of cap
The valve comprises a shell, a seat member, a coupling connecting them
together, a cap for the seat member, a valve chamber in the shell, and a valve
proper in said chamber The seat member has an annular seat, and the valve
proper is forced against this seat by a spring A deflating pin is fixed in the
seat member, so that by unscrewing and inverting the cap, its point can be used
to press in the pin and open the valve. The lower end of the shell 18 connected
to the tire in any suitable way to make a leak-tight joint, as by having its flange
passed into the tire and clamped tightly therein by a nut A thumb-nut clamps
the shell in the socket in the felly of a wheel The ingress passage leads to the
seat, and the egress passage leads from the valve chamber into the tire
A plate
engages the flat sides of the shell and prevents it from turning
In all the general features thus far referred to, the valve may be similar to
those now used or may be of any suitable construction with which my improve-
ments, which I will now describe in detail, may he emploved
One new feature consists in inseparably connecting the valve proper within
the shell, so that the valve proper can not be lost when the seat member 18
removed This is preferably done by forming the valve proper with a wide
flange, and forming the shell with one or more internal shoulders near its open
end past which the flange cannot pass I prefer to form the shoulders by press-
ing in the side walls of the smooth end of the shell on each side, so that the
flange cannot pass them. This makes the inlet to the chamber smaller than
its outlet Below the flange I form a shoulder, which also engages the flange to
prevent the valve proper from pressing in so far that it will injure the spring
I also provide an improved seat member, which has a guiding chamber below

page_text: the seat for guiding the valve proper to the seat, and deep flange having flat
sides fitting within the flat sides of the mouth of the shell, so that the seat
member cannot turn in the shell The chamber is so deep that the valve proper
will be prevented by the shoulder fiom escaping from the chamber when the
valve is open, and the flange fits the shell with sufficient snugness to prevent
the seat member from being tilted so much that the valve cannot seat properly.
Above the flange the seat member has a groove in which a rubber packing
is seated, and above this groove is a shoulder on which the flange of the coupling
bears The coupling has a socket receiving a ring of larger diameter than its
internal screwthread, so that the screwthiead constitutes a shoulder below the
packing ring for preventing separation of the seat member and coupling When
the coupling is screwed on the shell, the packing ing is pressed against the
smooth mouth of the shell, and makes a leak-tight joint between the shell and
the seat member
The duct through the seat member has an internal shoulder, and the pin has
projections above and below this shoulder, which prevent the pin from escaping
fiom the duct
The cap has a large internal chamber, and a separate top which is riveted
to the cap by a flange Before the top is riveted to the cap, a metal cup holding
a packing disk 18 inserted in the chamber This cup prevents the disk from
expanding, and the cup fits loosely in the socket, so that the cap can revolve
without turning the cup, thus preventing twisting of the packing disk, and
avoiding injury to it when the cap 18 screwed up
I provide an improved construction of valve proper by making the plunger of
such length that its end will project beyond the mouth of the shell, and forming
it with a shoulder under which the thumb nail or a tool can be placed to hold
the plunger outwardly, while the user replaces a new packing in the cup
I also
form it with a central projection having a head above the packing, which prevents
the packing from escaping from the cup, and which also receives the pressure of
the pin, and prevents the pin from injuring the packing The inner end of the
plunger 18 cylindrical, and fits within the spring to keep it in place For a
solid packing the projection is omitted.
With my new valve the user can remove the seat member by unscrewing the
coupling, without any danger of losing any part of the valve, and when the seat
member is screwed on, there is certain to be a tight joint at the mouth of the
shell, because the mouth is smooth and continuous A firm and tight joint can
be easily made between the seat member and the shell, and 1otation of the seat
member 18 prevented without having to notch the end of the shell
The packing
ring will not be injured by screwing the coupling tight, as the packing ring
will not have to rotate The valve proper will be correctly guided to its seat,
and cannot get out of order
When the seat member is removed, the valve proper can not be lost, and it
can be held up and cleaned or renewed without difficulty The plunger can be
made laige and strong, and will be heavy enough to operate with certainty under
any pressure, and to resist injury
A construction in which the valve proper is inserted from the rear end of the
shell, may have a ring held on by a screw and engaged by a shoulder to limit
the upward movement of the valve proper. A washer sets on a flat flange, on
which it 18 held by the head of the upwardly projecting pin The lower end of
the shell is closed by a nut, which holds the spuing in place, and the outer end
of the shell is constructed with a flat, and receives the seat member and coupling
Dated this 6th day of November 1899
J. C MEWBURN & ELLIS,
55 & 56, Chancery Lane, London,
Chartered Patent Agents.

page_text: I, GEORGE HERMAN FLRDINAND SCHRADER, of No 30, Rose Street, in the City
of New York, United States of America, Manufacturer, do hereby declare the
nature of the said invention and in what manner the same 18 to be performed, to b
particularly described and ascertained in and by the following statement.
This invention relates to pneumatic valves for ties.
Such valves have been made with a flat-sided externally-screw threaded shell
clamped to the tue and passing through the felly, to which shell a seat member
has been clamped by a coupling, the seat member canying the valve prope!,
and being screwthreaded at its outer end to couple with an air pump for inflat-
ing the tire, and to be closed by a cap when in use To prevent the seat member
tom rotating in the shell, the shell has been notched, and the seat member has
had a lug projecting into this notch, and to make a tight joint between the
seat member and shell, a rubber packing has been placed inside of the shell
to be clamped between it and the seat member.
My present invention aims to provide an improved construction for valves in
wh.ch the seat member is held on the end of the shell by a coupling, and to
this end I provide an improved valve plunger which is inemovably connected
within the shell so that it cannot be lost, a deflating pin which is irremovably
connected to the seat member so that it cannot be lost, and an improved constiue-
tion of cap
In the accompanying drawings,
Fig 1 18 a side elevation of the preferied form of my improved valve, showing
it in use on a tire, a fragment of the tire and felly of the wheel being shown in
section,
Fig 2 is a longitudinal section thereof cut on the line 2-2 in Fig 1, and
looking in the direction of the arrow, the parts being shown in the closed position,
Fig 318 a longitudinal section cut on the line 3-3 of Fig. 2, and looking in
the direction of the arrow, the cap being inverted, and the valve shown in the
open position;
Fig 4 is a plan view and side elevation of the valve shell and valve plunger when
the seat member is removed,
Fig. 5 18 a side elevation and bottom end view of the seat member alone, and
Fig. 6 is a longitudinal section of a modified form of valve
Referring to the drawings, A represents the valve, B the tire, and C the felly
of a wheel. The valve comprises a shell D, a seat member E, a coupling F con-
necting them together, a cap G for the seat member, a valve chamber H in the
ahell, and a valve proper I in said chamber The seat member has an annular
seat J, and the valve proper is forced against this seat by a spring K A deflating
pin L is fixed in the seat member, so that by unscrewing and inverting the cap G,
its point can be used to press in the pin L and open the valve, as shown in Fig 3.
The lower end of the shell I) is connected to the tire in any suitable way to make
a leak-tight joint, as by having its flange M pressed into the tire and clamped
tightly therein by the nut N The nut clamps the shell D in the socket in the
felly C P 18 the ingress passage leading to the seat J. and Q is the egress
passage leading from the valve chamber into the tire The plate R engaging
the flat sides of the shell prevents it from turning.

page_text: In all the general features thus far referred to, the valve may be similar to
those now used, or may be of any suitable construction with which my improve-
ments, which I will now describe in detail, can be employed.
One new feature consists in a top repair valve in inseparably connecting the
valve proper I within the shell D, so that the valve proper can not be lost when
the seat member is removed. This is preferably done by forming the valve proper
with a wide flange a, and after inserting the valve through the outer end, forming
one or more internal shoulders & near the open end of the shell past which the
flange a cannot pass I prefer to form the shoulders b by pressing in one or
both of the side walls of the smooth end of the shell as shown at e on each side,
so that the flange a cannot pass them, as shown in Fig. 4. This makes the inlet
to the chamber II smaller than its interior. Below the flange a I may form a
shoulder d, which also engages the flange a to prevent the valve proper from
pressing in so far that it will injure the spring K, but which is evidently not
essential to the operation of the valve.
I also provide an improved seat member E, which has a guiding chamber e
below the seat J for guiding the valve proper to the seat, and hold on the end of
the shell preferably by a deep flange f having one or more flat sides a fitting within
the flat aide or sides c of the mouth of the shell D, so that the seat membeĭ cannot
turn in the shell, and a coupling F holding the seat member down on the shell
The chamber e is so deep that the valve proper will be prevented by the shoulder d
from escaping from the chamber e when the valve 18 open, and the flange f fits
the shell with sufficient snugness to prevent the seat member from being tilted so
much that the valve cannot seat properly.
Above the flange f the seat member carries a rubber packing ring k, preferably
seated in a groove formed by the flange f and a shoulder 1, on which shoulder the
flange m of the coupling F bears The coupling F has a socket receiving the
ring k of larger diameter than its internal screwthread, so that the screwthread
constitutes a shoulder below the packing ring for preventing separation of the
seat member and coupling, the packing being so small as to permit the coupling
to tuin freely on it When the coupling is screwed on the shell D, the packing
ring is pressed against the smooth mouth of the shell without any twisting of
the material, and makes a leak-tight joint between the shell and the seat
member E
The duct P through the member E has an internal shoulder P, and the pin L
has projections q above and below this shoulder, formed preferably by flattening
the pin near its ends as shown, which prevent the pin from escaping from the
duct The ends of the pin are retained of their original cross-section to ensure
contact between such ends and the pin 1 on the cap and the head 2 on the valve
The cap Ghas a large internal chamber r, and a separate top s which is swaged
on the cap by a flange t Before the top is swaged to the cap, a metal cup u
holding a packing disk v, 18 inserted in the chamber This cup prevents the
disk from expanding, and the cup fits loosely in the socket r, so that the cap can
revolve without turning the cup, thus preventing twisting of the packing disk,
and avoiding injury to it when the cap is screwed up. The swaged connection,
together with the lower wall 3, of the chamber, serves to hold the packing and its
cup in the cap when the cap is off the valve.
I provide an improved construction of valve proper by making the plunger w
of such length that its end will project beyond the mouth of the shell, as shown
in Fig 4, and forming it with a shoulder r under which the thumb nail or a tool
can be placed to hold the plunger outwardly, while the user replaces a new pack-
ing in the cup z. I also form it with a central projection having a head 2
above the packing, which prevents the packing from escaping from the cup, and
which also receives the pressure of the pin L, and prevents the pin from injuring
the packing The inner end of the plunger is cylindrical, and fits within the
spring K to keep it in place The packing y may be a solid disk when no central
propection is formed in the cup z.

page_text: With my new valve the user can remove the seat member E by unscrewing
the coupling F, without danger of losing any part of the valve, and when the
seat member is screwed on, there is certain to be a tight joint at the mouth of
the shell, because the edge is smooth and continuous. A firm and tight joint can
be easily made between the seat member and the shell, and rotation of the seat
member 18 prevented without having to notch the end of the shell
The packing
ring will not be injured by screwing the coupling tight, as the packing ring
will not have to rotate. The valve proper will be correctly guided to its seat, and
cannot get out of order.
When the seat member is removed, the valve proper can not be lost, and it
can be held up and cleaned or renewed without difficulty The plunger can be
made large and strong, and will be heavy enough to operate with certainty under
any pressure, and to resist injury.
It is impossible for the packing in the cap to be lost as is frequently the case
with former constructions.
Fig 6 shows a construction in which the valve proper I 18 inserted from the
rear end of the shell and has a ring a¹ held on by a screw b', and engaging a
shoulder to limit the upward movement of the valve proper
The washer y
here sets on a flat flange z', on which it is held by the head of the upwardly
projecting pin, as before described The lower end of the shell is here closed by
a nut S, which holds the spring K in place, and the outer end of the shell is
constructed with the flat portion c, and receives the seat member Ę and coupling F
which are of the same construction as before descubed
It is obvious that some of the points of my improvement may be useful in other
combinations than those specifically set forth in the valve which I have described
For example the shouldered valve propei, I, might be useful in other shells than
that which I have shown and described, the cap, the seat member, or the shell
might be combined with other elements than those herein set out without
sacrificing the advantages incident to my invention While, therefore, I have
described with great particularity and completeness a valve embodying my inven-
tion, I am not to be understood as limiting myself to the construction so described
It will be seen that by my invention I provide a top repau valve in which the
valve proper is inserted through the open end of the valve, and is always accessible
through this end for repair, renewal or cleaning, and is still irremovably connected
to the shell, also that I provide a removable seat member having an open-ended
guiding chamber below the seat which serves to center and guide the valve proper
in ordinary operations, and which can easily be removed for giving access to the
seat to clean it.
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 18
1 A top repair pneumatic valve consisting of a shell, a seat member, and means
for holding the seat member removably on the mouth of the shell, in combination
with a valve proper within the shell and free to move therein and movable
partially out of the mouth thereof but held against separation therefiom when the
seat member is removed, substantially as described
In pneumatic valves, a shell, a seat member, and means for holding the seat
member removably on the mouth of the shell, in combination with a valve
proper within the shell and movable partially out of the mouth thereof, the shell
and the valve proper having engaging shoulders which prevent the latter from
escaping from the shell when the seat member 18 removed, substantially as
described
3 In pneumatic valves, a shell having an open end and a flattened portion, a
seat member fitting the end of the shell and having a flattened portion engaging
the flattened portion of the shell to prevent rotation of the seat member in the

page_text: shell, a valve proper, and means for retaining the seat member on the end of
the shell, substantially as described
4 In pneumatic valves, a shell having an open end and a laterally flattened
portion forming an internal shoulder, and valve proper in the shell having a
stop adapted to cooperate with said shoulder in preventing the escape of said
valve proper from said shell, substantially as described
5 In pneumatic valves, a shell having an open end and a flattened portion the
edge of which formis an internal shoulder, a valve proper in the shell having
a stop adapted to cooperate with said shoulder in preventing the escape of said
valve proper from said shell, a seat member having a flattened portion engaging
the flattened portion of the shell to prevent rotation of said member in said shell,
and means for retaining said seat member on the end of said shell, substantially as
described
6. In pneumatic valves, a shell having an open end and a valve proper therein,
in combination with a seat member fitting on said end and having a socket for
receiving the valve proper and a seat within said socket, a member guiding said
valve proper at its lower end and passing through the lower end of said seat
member, and means for holding the seat member on the end of the shell whereby
the upper end of the valve proper is guided by the socket in the seat member,
substantially as descubed
7 In pneumatic valves, a shell, and a valve proper therein having an end
removable outwardly to an accessible position, and having a shoulder beneath
which a tool can be inserted to hold the end of the valve proper in such position
for cleaning or repan, substantially as described
8 In pneumatic valves, a valve proper consisting of a plunger w having guid-
ing provisions at its lower end, and a cup-shaped cavity in its upper end, a pin
projecting from said upper end, a packing ing in said cavity, and a head on said
pin holding said packing ing in place, substantially as described and shown in
the accompanying drawings
9 In pneumatic valves, a shell having a continuous smooth edge surrounding
its mouth, a seat member fitting the mouth of the shell, means for preventing
1otation of said seat member when fitted onto said shell, a packing ring on said
seat member, and means for drawing the seat member and packing ring against
the mouth of the shell, substantially as described.
10 In pneumatic valves, a cap G having a top s consisting of a separate piece
and connected to the cap by an overhanging flange and a shoulder 3, so that a
cavity is formed in said cap, a cup-shaped washer u in the cavity and a packing
disk in the washer, whereby the disk is prevented from expanding aidewise and
the cap can rotate without rotating the disk, substantially as described, and
shown in the accompanying drawings
11 In pneumatic valves, a shell having a valve chamber, a valve proper
therein, a seat member fitting the mouth of said chamber, means for holding the
seat member and shell together, means for preventing relative rotation of said
seat member and said shell, and a deflating pin irremovably connected in said
seat member, substantially as described
12 In pneumatic valves, a seat member, a deflating pin therein, a stop in
the seat member and a cooperating stop in the deflating pin, the latter stop con-
sisting of a flattened portion of said pin intermediate of its ends, substantially as
described
13 In pneumatic valves, a shell and a valve proper therein, in combination
with a seat member having a seat and a socket for admitting said valve proper
and guiding it to said seat, and means for limiting the movement of said valve
proper to prevent its escape from said guiding socket, said valve proper projecting
partially out of said socket, substantially as described
14. In valves, a shell, and a valve proper therein, in combination with a
seat member removably carried by said shell, having a socket open at its

page_text: end for permitting said valve proper to enter said socket, and a seat within said
socket engaged by said valve proper, said valve proper projecting partially out
of said socket, substantially as described
JC MEWBURN & ELLIS,
55 & 56, Chancery Lane, London,
Chartered Patent Agents