Improvements in connection with Means for Inflating Tubeless Pneumatic Tyres.
Year: 1898

page_text: Date of Application, 6th June, 1898
Complete Specification Left, 4th Mar., 1899-Accepted, 29th Apr., 1899
PROVISIONAL SPECIFICATION.
Improvements in connection with Means for Inflating Tubeless
Pneumatic Tyres.
I, AMÉDÉE BOURSIN, of 34, Nelson Street, Tialee, County Kerry, Ireland,
Dentist, do hereby declare the nature of this invention to be as follows
"
-
This invention has reference to improvements in connection with means for
inflating tubeless pneumatic tyres, such as the "Tieuch and the Fleuss"
tyres.
In carrying out my invention I first drill a hole radially through the rim of the
wheel in which I insert a tube with a screw thread on its outer cncumference,
and a portion of which projects outside the inner periphery of the 11m
This tube I call for convenience a
"
"shank."
I next take a tube of smaller diameter than the tube or shank just described
which for convenience I call a stem " and which tapers towards one end and
is provided with an outer male screw thead on its thickened end constituting
a nipple
This stem in then inserted in the shank from the inner periphery of the rim
until the tapering point penetrates to the extent of about three quarters of the
width of the longitudinal lips or edges of the tyre, when it (the stem) 18 fixed
to the shank by screwing it in position with a sleeve or collar forming portion
of the thickened end of the stem.
The valve is now ready for use and in order to inflate the tyre the ordinary
inflator 18 screwed on to the nipple of the stem whereupon the pumped air
will force its way through the unpenetrated portion of the lips or edges of the
tyre.
Upon the cessation of pressure from the inflator the unpenetrated portion of
the lips or edges will automatically close and thus act on the principle of an
automatic valve, and prevent the air escaping
When the tyre 18 inflated the stem is withdrawn from the shank whereupon
the lips or edges of the tyre close up in their normal condition and consequently
there can be no danger of leakage occurring in connection with this means of
inflation as is the case with the ordinary valves at present in use.
Dated this 3rd day of June 1898.
J. K FAHIE & SON,
Agents for Applicant, 9, Westland Row, Dublin

page_text: Improvements in connection with Means for Inflating Tubeless
Pneumatic Tyres
I, AMÉDÉE BOURSIN, of 34, Nelson Street, Tialee, County Kerry, Ireland,
Dentist, do hereby declare the nature of this 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 has reference to improvements in connection with means for
inflating tubeless pneumatic tyres, anch as the "Trench" type, whereby the
ordinary inflating valve is dispensed with
In carrying out my invention 1 fust drill a hole 1adially through the 11m of the
wheel in which I insert a tube with a sciew thread on its outer circumference,
and a portion of which projects outside the inner periphery of the rim
This tube I call for convenience a shank
"
61
"
I next take a tube of smaller diameter which to convenience I call a stem
and which tapers towards one end, and 18 provided with an outer male screw
thread on its thickened end constituting a nipple.
This stem 18 then inserted in the shank from the inner periphery of the rim
until the tapering point penetrates to the extent of about three quarters of the
width of the longitudinal lips or edges of the tyre, when it (the stem). 18 fixed
to the shank by screwing it in position with a sleeve or collar mounted on ito
thickened end.
The device is now ready for use, and in order to inflate the tyle, the ordinary
inflating pump 18 screwed on to the nipple of the stem whereupon the pumped air
will force its way through the unpenetrated portion of the lips or edges of the
tyre.
Upon the cessation of pressure from the inflating pump the lips or edges will
naturally resume their normal position thus acting on the principle of an auto-
matic valve, and preventing the au escaping
The accompanying diawings will enable my said invention to be more readily
understood and carried into practice.
Fig. 1 represents a cross section of a wheel im and tyre of the "Trench" type
showing in elevation the parts peculiar to my invention, adjusted for inflating
the tyre.
Fig. 2 18 an enlarged view of the 11m and shank
Fig 3 18 a cross section, to a similar scale, of the stem and adjustable sleeve
or collar
Figs 4, and 5 are modifications
Fig. 4 is a cross section of the wheel rim showing how the invention may be
applied without the use of the shank, as in the case of wooden or solid rims.
Fig 5 shows a modified mode of applying the shank to the rum, especially
wooden or solid runs.
Similar letters of reference indicate corresponding parts in each of the views.
A is the shank threaded on its outer cucumference as above described, and
screwed info the 11m B, until its dome shaped top abuts firmly against the
inverted groove usually found in this class of rim, a short length projecting
outside the rim for the purpose piesently described.
C is the stem provided with a movable sleeve or collar C¹, capable of screwing
up and down between the shoulder C, forming an integral part of the stem, and
the shoulder C, formed by the collar or nipple D, which latter is screw threaded
both on its exterior and interior, the outer threads serving to engage the coupling
of the ordinary inflating pump.

page_text: In using the device for inflating purposes the sleeve or collar U¹, is screwed
up against the shoulder C, whereby the travel of the stem permits of its point
entering to the requied extent between the lips of the tyre, and when using
as a deflator, the sleeve or collar 18 brought against the shoulder C³, whereby
the point of the stem is capable of rising into the tyre and allowing the air to
евсаре.
It will be obvious that upon forcing air through the stem, when the device
s adjusted as in Fig. 1, the lips of the tyre will be blown open, and will naturally
eclose, immediately the external air pressure ceases, thus acting as an automatio
valve and preventing the escape of air.
When the device is not in use a suitable dust cap may be screwed on the
projecting end of the shank
In a modification of my invention I may dispense with the shank and use
the stem only, in this case the attachment of an externally screwed collar to the
im as shewn at E, Fig 4 18 only necessary.
This collar may be secured by solder or otherwise, and engages the movable
collar of the stem, in the manner just described.
I prefer however the use of the shank because it guides the stem in a proper
direction, and holds it steadily during the operation of inflating or deflating.
Fig. 5 shows the adjustment of my invention to a wooden or solid metal rim
Heie the shank instead of being inserted from the inner periphery of the rim
18 inserted from the outer periphery, and is provided with a flange II, and lock
nut H¹, whereby it is held firmly in position.
It is obvious this modified way of applying the shank may also be used for
hollow 11ms.
My invention obviates the difficulty hitherto experienced in fixing and making
air tight the means for inflating this type of tyre.
Having now particularly described and ascertained the nature of my invention
and the manner in which the same may be performed, I declare that what I
claim 18.
First: The means for inflating tubeless pneumatic tyres, especially of the
"Trench" type, consisting of a tapering tube or stem introduced partly between
the lips of the tyre so that air forced from without will blow through the edges
of the lips and enter the tyre, the edges naturally reclosing upon the cessation
of the external air pressure thus acting as an automatic valve and preventing
the air escaping, substantially in the manner, as herein described and illustrated
n the accompanying drawings.
Second. The means for deflating tubeless pneumatic tyres, especially of the
**Trench" type, consisting of a tapering tube or stem introduced between the
lips so as to cause the point of the tube or stem to piotrude into the tyre
and allow the compressed au to escape, substantially in the manner, as herein
specified and illustrated in the accompanying drawings.
Dated this 24th day of February 1899.
J. K FAHIE & SON,
Agents for Applicant, 9, Westland Row, Dublin.