Improvements in or relating to Inflating Pumps.
Year: 1897

page_text: Date of Application, 10th Aug., 1897-Accepted, 16th Oct.,
1897
:
Improvements in or relating to Inflating Pumps.
A communication from HERMAN LEINEWEBER, Mechanical Engineer, of 8240
Manistee Avenue, South Chicago, Illinois, and DOUGLAS DYRENFORTH, Engineer
of Deming Court, Chicago, Illinois, United States of America.
$
I, ALFRED JULIUS BOULT of 111 Hatton Garden in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
Our invention is a pump for use in inflating bicycle tyres. It is intended to
take the place not only of the hand pump but also of the foot pump which are now
in common use, and it partakes somewhat of the nature of both of these kinds
of pump. The objection to the hand pump is that it is troublesome to use and
takes too long to inflate the tyre. The objection to the foot pump is that it is
too large and cumbersome.
Our pump comprises a barrel of a size which will enable it to be carried in the
tool case which is usually supplied with every bicycle. At the lower end of
this barrel, which is marked A in the drawings, is a swinging pedal extension B
which can be swung from a vertical to a horizontal position, and when in the
horizontal position is adapted to receive the foot which thereby holds the pump
to the ground. The piston C has a cup-shape washer D and is carried by the piston
rod E which passes through the upper end of the barrel A, and inside the barrel
is surrounded by the helical spring F. The bearing of the lower end of the
spring F is on the washer G secured to the piston rod E, and the bearing of the
upper end of the spring F is against a washer H which is perforated as shown
at I and supports the nipple K. Between the washer H and the head of the
barrel A is packing L. The upper end of the piston rod E receives one end of
a cord, chain or other flexible connection M, the opposite end of which cord,
chain or other flexible connection receives a handle N. The usual flexible tube O
is connected with the nipple K in the usual manner. At its lower end the barrel A
is perforated as shown at P to permit air to enter.
The operation is as follows:-
The flexible tube O is secured to the nipple K and the other end of the tube is
secured to the valve in the tyre. The foot is placed on the pedal extension B and
the handle N is grasped with the hand. The air is forced into the tyre by lifting
on the cord or chain M, thus compressing the air which has been admitted through
the aperture P and thence around the piston into the body of the barrel. The
spring which is compressed during this operation serves to retract the piston to
its original position permitting the barrel again to fill with air which is forced into
the tyre on again lifting the piston.
It will be seen that the essential features of the pump are the barrel and piston,
the pedal extension which may be folded back on the barrel, and the flexible con-
nection between the movable member of the pump and the handle, these elements

page_text: being so arranged that when not in use they may all be folded together into a
space small enough to enable them to be placed in the tool bag, and when in use
both the hand and foot may be utilised to pump up the tyre. The barrel of the
pump may be movable and the piston stationary, the pedal extension B being on
the piston, and any such change will come within our invention.
Having now particularly described and ascertained the nature of the said in-
vention, and in what manner the same is to be performed, we declare that what we
claim is:-
1. A pump comprising a barrel and piston one movable with relation to the other,
a folding pedal extension on a fixed member of the pump, and a flexible cord or
the like secured to the movable part of the pump and having a handle at its end,
and a nipple in the pump barrel, all as described.
2. A pump adapted to be operated by the hand and foot and, when not in use,
adapted to be confined in the small area necessary to place it in the tool bag of
a bicycle, and comprising a barrel and piston, one of which carries a pedal extension
and is adapted to be held stationary to the ground by the pressure of the foot, and
the other of which carries a flexible cord, chain or the like with a handle at the
end whereby it may be operated to force air out of the pump, (which flexible cord,
chain or the like may, when not in use, be wrapped around the barrel) the nipple
and the spring around the piston, all as described.
Dated this 3rd'day of August 1897.
BOULT & WADE,
Agents for the Applicant.