Improvements in Tools for Repairing Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 27th Apr., 1897—Accepted, 5th June, 1897
COMPLETE SPECIFICATION.
Improvements in Tools for Repairing Pneumatic Tyres.
1, FRANK HOWARD MAYER, of 20 Broadway Denver, in the County of Arapahoe
and State of Colorado, United States of America, Editor, do hereby declare the
nature of my 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 devices for repairing punctures and rents in pneumatic
tyres for bicycles or other wheeled vehicles, and it has for its object to provide a
simple device by means of which a liquid cement may be injected into the tyre,
where it may be allowed to harden over the puncture or rent.
I will describe a tool for repairing pneumatic tyres embodying my invention,
and then point out the novel features in the appended claims.
Reference is to be had to the accompanying drawings forming a part of this
specification, in which similar characters of reference indicate corresponding parts
in all the views.
Figure 1 is a side elevation of a device embodying my invention and showing the
same in position in a pneumatic tyre;
Figure 2 is an edge view of the device;
Figure 3 is a sectional elevation; and
Figure 4 is a section on the line 4-4 of Figure 3.
a
The invention comprises a receptacle I, for containing a liquid cement, such for
instance as a solution of rubber, gum, etc. The receptacle consists of suitable
metal and has compressible sides 2, so that the air pressure caused by forcing the
sides inward will force the cement out of the receptacle. The receptacle
has
spout 3, interiorly threaded to engage the exterior screw thread of an enlarged
portion 4 of a straight tubular outlet 5. The tubular outlet 5 at its junction with
the enlarged portion 4, may be provided with a milled flange 6, so that the parts
may be readily screwed together or detached.
Movable longitudinally in the outlet tube 5 is a needle shank 7. This needle
shank 7 is sufficiently small to provide a space between it and the interior of the
tube 5 for the passage of sealing or cementing material. It is desired that there
shall be no lateral movement of the shank 7 in the tube 5, and for this purpose
I have shown said shank as oval in cross section, with its greater diameter bearing
against the inner wall of the tube. The inner end of the shank 7 is provided with
a disc valve 8, which is received in a cup-shaped valve seat 9, formed in the inner
end of the enlarged portion 4 of the outlet tube. Preferably the valve 8 will have
a screw thread engagement with the shank 7, so that said valve may be removed
when it is desired to remove the shank for the purpose of cleaning the shank and
the interior of the tube.
The shank 7 terminates at its outer end in a bulb-shaped needle point 10, the
greatest diameter of said point being substantially equal to the outer diameter of
the tube 5, so that when said point is forced through a puncture or rent in a tyre,
a hole will be made sufficiently large for the passage of the tube 5. When not
in use, the needle point 10 may be enclosed in a cap 11, fitting on the end of
the tube 5.
The operation of the device is as follows:-
--
The receptacle being filled with cementing material, the tube containing the needle
L
11
CL the aunatnes to

page_text: the interior of the tyre, and the end of the tube 5 is also forced through the
puncture, as plainly indicated in Figure 1. A firm pressure being exerted on the
yielding sides of the receptacle, the compressed air will force the cementing liquid
up into the tube-5, and around the needle shank, and out through the end of the
tube 5, where it will spread out around the head of the needle substantially in ring
form. The same compression of air in the receptacle by acting against the valve 8,
will force the same to its scat and thus prevent a further discharge of liquid from
the receptacle, thus preventing too large a quantity from being distributed around
the needle point. The bulb-like form of the needle point serves to deflect the
cementing material in lateral directions, and upon withdrawing the tool, a certain
amount of the cementing liquid will be drawn into the puncture, and there
remaining on the interior of the tube, will spread, and when it becomes hardened,
will effectually seal the puncture.
It is obvious that instead of a disc valve 8 attached to the inner end of the
shank 7, I may employ a spider like construction, as one object is to form a stop to
prevent the needle from moving too far outward.
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 tool for repairing tyres, comprising a compressible receptacle for liquid sealing
or cementing material, a tubular outlet for said receptacle, a needle shank movable
longitudinally in said tubular outlet, a needle point on the outer end of said shank, the
greatest diameter of said needle point being substantially that of the diameter of the
tubular outlet, and a stop on the inner end of the needle sbank, to prevent its movement.
too far outward, substantially as specified.
2. A tool for repairing pneumatic tyres, comprising a compressible receptacle, a
straight tubular outlet therefor, a needle shank movable longitudinally in said outlet,
means for preventing a lateral movement of said shank in the outlet, a bulb-like needle
point on the outer end of the shank, the largest diameter of said needle point being
substantially equal to that of the tubular outlet, and a stop on the inner end of said
shank portion, the said stop also serving as a valve, substantially as specified.
3. A tool for repairing pneumatic tyres, comprising a compressible receptacle, a
straight tubular outlet having a screw thread engagement with the outlet of said
receptacle, a needle shank extended through the tubular outlet, the said shank being
oval in cross section, whereby it may be engaged with the interior of the tubular
outlet at opposite sides, a disc valve on the inner end of the said shank, adapted
to engage in a valve seat formed at the inner end of the tubular outlet, and
a bull-shaped needle point on the outer end of the shank, substantially as
specified.
4. A tool for repairing pneumatic tyres, comprising a compressible receptacle, a
straight tubular outlet for said receptacle, a needle stem extended through said
tubular outlet, a disc valve having screw thread engagement with the inner end
of said shank, a bulb-like needle point on the outer end of said shank, the greatest
diameter of which is substantially that of the exterior of the outlet tube, and a
cap or cover for said needle point, substantially as specified.
Dated thi. 9741
ր A1 1007
Dated th: 9741
day of April
11907
A. M. & WM. CLARK,
53 Chancery Lane, London, Chartered Patent Agents.