Improvement in Cup Washers or Suckers, particularly as applied to Pumps or Inflators as used for Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 18th Sept., 1897
Complete Specification Left, 14th June, 1898-Accepted, 16th July, 1898
Improvement in Cup Washers or Suckers, particularly as applied
to Pumps or Inflators as used for Pneumatic Tyres.
CLEMENTS COURTNEY, 25, Ashbrook Road, Upper Holloway, N., Engineer, do
hereby declare the nature of this invention to be as follows:-
It is found that the leather or flexible washer as used in pumps or inflators after
a time becomes (or gets) to small for the barrel either thro' wear or shrinkage
and does not give satisfaction now to prevent this defect I make a washer of
hard sheet brass or other material and so formed that it lies inside the cup leather
or sucker and is held in place by a screw or other means and so shaped as to
exert an outward pressure on the inner wads of the leather washer or sucker
so that the leather washer or sucker must at all times fit the barrel the
spring washer refered to is made by taking a peice of sutiable material and so
perforating it tha a number of flat-bars are formed which when formed up acts
as a spring against the cup leather.
11
101 1
1
1000
Improvement in Cup Washers or Suckers, particularly as applied
to Pumps or Inflators as used for Pneumatic Tyres.
I, CLEMENTS COURTNEY, of 25, Ashbrook Road, Upper Holloway, in the County
of Middlesex, Manufacturer, 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 the cup leathers of pumps, particularly those of
air pumps such as are used for inflating pneumatic tyres.
It is well known that in air pumps- and the like, used for compressing air the
cup leather unless constantly lubricated becomes hard and often take such a
permanent set that if the pump has not been used for some time it is more or less
inoperative when the pump is again put into use.
According to my invention I use in combination with the cup leather a cup
shaped spring washer so shaped and arranged as to exert an outward pressure on
the inner side of the cup leather so as to press it outwardly into effective engagement
with the cylinder of the pump.
In the accompanying drawing which illustrates this invention :-

page_text: Figure 1 is a view of a pump-partly, in section-showing the application of this
invention, and
Figures 2 and 3 are views in plan and elevation respectively on an enlarged scale
of the metallic washer.
Throughout the views similar parts are marked with like letters of reference.
The cup shaped spring washer A is stamped or pressed up from a sheet of any
suitable metal, and is so cut and perforated that its edges form a series of blades a
as shown most distinctly in Figures 2 and 3. This washer is placed within the cup
leather X and is fixed to the end of the piston or plunger Y of the pump by means
of the screw nut a in the usual manner. The size and shape of the washer A. is
regulated according to the size and shape of the cup leather X and the diameter of
the cylinder Z of the pump.
By the use of this invention air pumps are rendered more effective, are less liable
to get out of order, and a material saving of time is effected in fitting them up in
the course of manufacture.
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:
In an air pump or its equivalent, the combination with the cup leather, of a cup
shaped spring washer constructed arranged and adapted to operate, as and for the
Wurdose gat forth
Dated this 14th day of June 1898.
ROBERT E. PHILLIPS, Assoc. M.Ints.C.E., M.I. Mech. E.,
Consulting Engineer & Patent Agent, 70, Chancery Lane, London, W.C.,
Agent for the Applicant.