Improvements in Inflating Pumps for Tyres and the like.
Year: 1899

page_text: Date of Application, 3rd Aug., 1899
Complete Specification Left, 28th Sept., 1899-Accepted, 4th Nov., 1899
PROVISIONAL SPECIFICATION.
Improvements in Inflating Pumps for Tyres and the like.
I, PAUL HOEPPNER, 56, Knowle Road, Brixton, London, S.E., Clerk, do hereby
declare the nature of this invention to be as follows:-
The nature of the present invention is to safe strength in pumping especially
in use with a cycle tire. This is to be done by use of a spring with the air-
pump which officiates either inside or outside of the tube of the pump. This
spring is most useful when the pumping requires greater strength and can be
set out of action at the beginning of pumping without any particular trouble. :
Dated this 3rd day of August 1899.
I, PAUL HOEPPNER, of 56, Knowle Road, Brixton, London, S.W., Clerk, 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 follow-
ing statement:-
:-
This invention relates to improvements in inflating pumps for tyres and the
like, and has for its object to provide simple and convenient means whereby the
operation of inflating a cycle tyre or the like, is greatly facilitated; nearly all
strain is taken off the operator; the time necessary for inflation greatly reduced,
while furthermore the action of the air in the semi-inflated tyre assists the
process of inflation.
In order that this my said invention may be the more readily understood and
carried into practical effect, reference is hereby made to the accompanying
sheet of illustrative drawings, wherein :-
Fig. 1, is a sectional view of my improved inflating pump.
Fig. 2, a sectional view of a detail thereof.
Fig. 3, is a sectional view of the upper part of the pump, while,.
Fig. 4, is an elevational view of the plunger rod I employ.
Referring to the drawings, wherein like letters of reference indicate corre-
sponding parts throughout the several figures, a represents the inner tube or
cylinder of the pump in which is slidingly disposed the piston rod 6 carrying at
one end the plunger. c.
The said cylinder and piston are located within an aluminium or other
sleeve d, through the lower open end of which the lower end of the cylinder a

page_text: projects, while the upper end of the piston rod 6 projects through an opening d
in the upper end of said sleeve, as shewn by Fig. 1.
The said opening which is in the form of a depending neck is tapped or
internally screw-threaded as shewn, while the upper end of the piston rod is
screw-threaded for a portion of its length to engage with such tapped opening.
The lower edge of the depending neck aforesaid is flanged as at d².
e represents a disc plate provided with a depending circular flange e¹ which
is screw-threaded upon its periphery in order to screw into the tapped upper end
of the cylinder a, such disc plate e having its ends turned down or flanged as
at e³, in order to constitute. travelling guides, which, in operation slide against
the inner sides of the sleeve d and maintain the upper part of the cylinder in
its central position within the said sleeve, and prevent the cylinder having any
lateral play, while at the same time one of such end flanges e³ serves as a seat
for the upper end of a coil-spring f to abut against.
The said coil-spring f is disposed within the sleeve d, around the cylinder a,
the lower end of such spring resting upon the bottom d³ of the sleeve d and
being held in place by the struck-up or flanged rim d around the central open-
ing in such sleeve, in conjunction with the sides of the latter.
The usual handles or gripping devices 9 are provided upon the upper end of
the piston band upon the nipple of the cylinder a.
In operation, the tyre or the like is inflated by connecting the end of the
flexible tube with the nipple of the inflating valve, and the piston and plunger
forced in and out the cylinder in the usual manner.
During this operation the sleeve d slides along the cylinder a, the spring f
being compressed at the end of the upward stroke, while the expansion of such
spring greatly assists the operator in overcoming the pressure of the air in the
inflated tyre or the like by automatically returning such sleeve, and with it the
piston on its downward stroke.
In order to put the spring out of action and transform the pump into one of
ordinary kind, I unscrew the piston rod b from the sleeve d so that the lower
flanged end of the depending neck on the upper part of such sleeve rests
upon and is supported by the disc plate e, so that by this means the piston and
plunger can be operated without moving the sleeve d and compressing the
spring.
I preferably form the upper end of the piston 6 of tubular form and of such
a size as to conveniently receive the flexible tube h when the pump is out of
use and the said tube disconnected from the lower end of the cylinder 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. The improvements in inflating pumps, consisting in a sleeve slidingly dis-
posed upon the cylinder, such sleeve having a depending neck in the upper end
which is internally screw-threaded to engage with the threaded portion of the
piston rod carrying the usual plunger, the lower end of said sleeve having an
opening therein for the cylinder to pass through, said opening being surrounded
by a raised rim or flange; and a disc plate having a depending central flange
adapted to screw into the tapped upper end of the cylinder, said disc plate
having a downwardly flanged rim against which one end of a coil spring abuts,
said spring being disposed within the sleeve around the cylinder and having its
lower end seated against the bottom of said sleeve, substantially as described
and as illustrated by the drawings.
2. In inflating pumps, the sleeve d having a tapped opening in its upper
end with which engages screw threads upon the periphery of the piston rod
located within the air cylinder upon which the said sleeve slidingly fits; in com-
bination with a coil spring f disposed within said sleeve around the cylinder,
the lower end of said spring bearing against the bottom of the sleeve and its

page_text: upper end being fixed to a disc plate e located within the sleeve, said disc plate
having a central opening through which passes the piston, and a screw threaded
central flange which screws into the tapped upper end of the cylinder, the rim
of said disc plate being downwardly flanged, all arranged, combined and
operating substantially as and for the purpose described and as illustrated by
the drawings.
Stea
Tis Fota και οι κυρι
HUGHES & YOUNG,
55 & 56, Chancery Lane, London, W.C., Agents for Applicant.