Improvements in Rotary Pumps.
Year: 1897

page_text: Date of Application, 8th Oct., 1897-Accepted, 13th Nov., 1897
COMPLETE SPECIFICATION.
Improvements in Rotary Pumps.
I, DAVID MORELL, of Wilhelmshoher Allee 37, Cassell in the German Empire,
Locksmith, 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 relates to rotary pumps and more particularly to the vanes of
such pumps. Its chief object is to construct the vanes in such a manner that they
are extremely durable and so that they make a perfect fit against the casing and
thus considerably increase the efficiency of the pump.
The accompanying drawings illustrate how my invention may be carried into
effect and will be hereinafter referred to.
Figure 1 shews a sectional elevation of the rotary part of the pump illustrating
the construction of the vanes.
Figure 2 represents the same part partly in end elevation and partly in cross
section.
Figure 3 is an illustration of a metal disc or plate one of which is arranged upon
each end of the rotary part of the pump.
Figures 4, 5, and 6 are views of the details.
The rotary part or piston of the pump is secured to the shaft w and is provided
with a suitable number of vanes, in this case 'three. Each vane consists of
metallic plates 6 arranged alternately with soft leather, india rubber, felt or
similar plates a. The alternate layers are secured together by means of the
end metallic discs d and the through bolts or screws 3.
As will be seen on reference to the Figures 4 and 5 the outer edges of the metallic
plates are tapered and corrugated or grooved and these grooves are filled by and
key with the soft leather or similar interposed plates when the screws s are
tightened and endwise pressure is set up. A smooth cuter bearing surface is thus
obtained. The end plates d are secured to the vanes or to the boss of the rotary
part in any suitable manner.
The metal plates 6 are formed on their inner edges with projections which fit
in grooves formed in the boss c.
The central plate in each vane is formed with
two lateral projections through each of which a set screw passes into the shaft w,
thus firmly securing the vane in place.
The end plates d are recessed for the reception of packing discs or the like a¹ by
means of which tight end joints are formed.
A vane constructed as before described is very durable and deteriorates but
very little as the packing material is held firmly in place.
It will, of course, be understood that these improvements are equally applicable
to vanes of other shapes than that shewn.
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. Vanes for rotary pumps, consisting of alternate metal plates and plates of

page_text: suitable packing material, constructed and arranged substantially as hereinbefore
described and as illustrated by the accompanying drawings.
2. Vanes for rotary pumps constructed and arranged substantially as herein-
before described and as illustrated by the accompanying drawings.
Dated this 7th day of October A.D. 1897.
W. E. HEYS & SON,
Agents for the Applicant.
W. E. HEYS & SON,
Agents for the Applicant.