Improvements in and relating to Valves for Pneumatic Tyres.
Year: 1899

page_text: Date of Application, 14th Sept., 1899-Accepted, 11th Nov., 1899
COMPLETE SPECIFICATION.
Improvements in and relating to Valves for Pneumatic Tyres.
I, EDWARD FORBES PICKETT, of 324, Bird Avenue, Buffalo, New York, in the
United States of America, Draftsman, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, reference being had to the
accompanying drawings and to the letters and figures marked thereon, that is
to say:
My invention relates to an improved form of. valve adapted for use in con-
nection with pneumatic tires, and it has for its object the production of a valve
of very simple construction and capable of being manufactured very cheaply and
adapted to be attached to the tire independently of the wheel rim; the valve
being preferably composed wholly of rubber together with its casing.
My invention includes improvements relating to the form of valve and the casing
therefor; a tool for inserting the valve in proper position and an improved form
of nipple for the air pump adapted to be used in the inflation of the tire having
my improved form of valve.
In the accompanying drawing,
Figure 1 is a sectional view through a tire showing my form of valve in
place as applied thereto.
Figure 2 shows the valve in the position it assumes when the pump nipple is
being introduced to inflate the tire.
Figure 3 is a detail view of the valve comprising the two valve parts and the
connecting elastic stem.
Figure 4 is a sectional view showing the position of the valve when the tire
is to be deflated.
Figure 5 shows one form of valve casing, and
Figure 6 is a modified form.
Figure 7 is a detail view of the pump nipple.
Figures 8, 9, 10 and 11 show details of the tool for inserting the valve.
The tire is shown at A and represents any known or improved form. A valve
casing B is preferably applied to the interior of the tire and then vulcanized so
as to become practically integral therewith. This casing is preferably of the
form shown in Figure 5 and may be separately molded and applied to the tire,
the head or flange 2 conforming to the shape of the interior of the tire. This
valve casing has a central passage 3 adapted to receive the stem of the valve
and a conical valve seat 4 adapted to receive one of the valve parts. A like seat
is preferably formed in the tire as at 5, to receive the outer valve part. I may
however modify the valve casing as shown in Figure and provide an outer
flange or collar 6 with the tire fitting in the space 7 and form the outer valve
seat also in this casing. I prefer however, the form of casing shown in Figure 5
and as applied in Figure 1.
The valve is, as shown in Figure 3, preferably of one piece of rubber and
provided with valve parts a, b, of conical or tapering shape, these being con-
nected by an elastic stem c. The valve, when in place, as shown in Figure 1,
has its parts a, and b, tightly seated and kept seated by the elasticity of the
stem. In order to inflate the tire I provide the valve with a projection d which
serves as a handle. This can be readily grasped by the fingers and the valve

page_text: drawn to one side, as shown in Figure 2, so as to insert the nipple of the pump
and the pressure of air is sufficient to unseat the inner valve and allow the tire to
be inflated. As soon as the nipple is withdrawn the elastic stem draws the
outer valve b to its seat.
In order to deflate the tire I have provided a recess extending lengthwise of
the valve, as shown in Figures 1 and 4, and this allows me to use a wire e which
is inserted in the recess f, and by applying pressure to the wire the inner valve a
is unseated and the tire readily denated.
It is necessary to provide means for readily inserting the valve in place and
for replacing the valves when worn or when found to be necessary and for this
purpose I use a simple tube which I designate an inserter; it is shown in
Figures 8 to 11 and is tubular as shown at C, having a cut-away portion g, with
a Haring end hand a contracted passage or opening between the Haring end
and cut-away portion, shown at i. To insert the valve the stem is stretched so as
to allow it to pass through the contracted portion with the valve part a seated
in the flaring end of the inserter tube. The operator holds the end of the tube
in his hand and stretches the stem by grasping the outer valve part 6, as shown
clearly in Figure 8, and then forces the inner valve part through the opening
in the tire and casing until the valve part a has passed entirely through and
finds its seat at 4. The tube is then withdrawn and the elastic stem instantly
seats both valves.
My improved valve having no metal parts requires no threaded connection with
the nipple of the pump and I use instead of the ordinary threaded nipple, a
plain nipple as shown in Figure 2 with a conical head and this is adapted to be
inserted in the opening, the air being forced through the central bore to the
interior of the tire. I may use a modified form of nipple, as shown in Figure 7,
in which a perfectly plain nipple is used, though I prefer the shouldered form
as when forced into position for inflating the tire the shoulder increases the
frictional contact and renders the pump less liable to be displaced during the
operation of inflating the tire.
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
1-A valve for pneumatic tires comprising a connecting stem, a valve at each
end and a projection or extension at one end for moving the valve, substantially
as described.
2-A valve tube or casing, a valve stem, a valve at each end fitted to seats and
means for deflating the tire consisting of a longitudinal recess in the valve stem
adapted to receive a wire or the like to unseat the valve.
3 In combination with a tire, a valve tube or casing secured thereto and
having a valve seat, a second seat in the tire and elastically connected valves
fitted to said seats, substantially as described.
4--An inserter for valves comprising a tube with or without a flaring end, a
passage through the same for the stem of the valve, the said valve being adapted
to be held in said inserter while being forced into place within the tire opening,
substantially as described.
5-In combination with the valve and casing, a pump nipple having a conical
unthreaded end adapted to be inserted alongside the valve stem when the tire
is to be inflated, substantially as described.
Dated this 14th day of September 1899.
ed this 14th day of September 1899.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and , Market Street, Nottingham,
Agent for the Applicant.