Improvements in Rotary Pumps, Blowers, and Exhausters.
Year: 1894

page_text: Date of Application, 22nd Dec. 1894--Accepted. 26'h Jan. 1895
COMPLETE SPECIFICATION.
Improvements in Rotary Pumps, Blowers, and Exhausters.
I, JOHANN KLEIN of Frankenthal, Bavaria Germany, 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 refers to the construction of a rotary pump whereby wear ard
tear is largely prevented and the same efficiency is maintained. The pump is
made with rotating cylinders working with each other without special joint making
appliances and being of the same diameter and having the same cucumferential
speed they roll upon each other without grinding action and hence without
appreciable wear,
Figures 1, and 3 are vertical cross sections showing the parts in different
characteristic positions, and Fig 4 a longitudinal section onl Ime 28
Figure 1
The rotary pump consists of three cylinders 2, 3 and 3 of like diameters and
having their bearings so placed in the casing 1 that then shafts 4 lie in the three
angle points of a triangle the upper cylinder in certain parts touching the two lower
ones, these latter however not touching each other.
The two lower cylinders 3 have each two diametrically opposite openings 31
which however do not reach to the middle, the shafts passing though from end to
end. The cylinders are of the section shown or thereabouts.
The upper cylinder 2, which is in contact with the two lower ones 3, 3, has two
wings 2 inserted diametrically opposite each other which are of such a radial
length as to touch and slide along the interior upper cucular part of the casing.
The shafts 4 of the cylinders are outside the casing provided with tooth wheels of
equal diameter gearing with each other so that all three cylinders work with
exactly the same circumferential speed. In consequence of this the cylinders 3 3
roll upon the upper cylinder 2 without any ginding action, while the two lower
cylinders 3 do not touch each other The wings 2 of the upper cylinder 2 during
its rotation engage alternately with the openings 3 of the lower cylinders 3, so
that the latter work fluid tight against the upper cylinder 2 partly alternately
(Figure 1) and partly simultaneously (Figs. 2 and 3). As the openings 3' in the
lower cylinders are very large and do not make Joint against the upper cylinder,
the wings never strike against edges of the openings, not even when the driving
wheels on the shafts are worn out. The driving wheels may in consequence of the
large openings 3' be shifted round somewhat without influencing the action of
the pump.
As only the wings 21 are subject to wear they are so inserted in the cylinder 2
that they can be set up by means of wedges or thin sheet metal pieces underneath.
According to the direction of rotation of the cylinders the water will pass through
from left to right or right to left
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 18:
1. A rotary pump with a casing wherein work three cylinders uz -an upper
cylinder provided with two wings placed diametrically opposite to each other and
airanged to be set up for wear, and two lower cylinders working against the upper
cylinder but not in contact with each other and each provided with two diametrically

page_text: opposite openings, all three cylinders being of the same diameter and geared to
have the same circumferential speed, and the wings of the upper cylinder passing
freely through the openings in the lower cylinders, so that the cylinders do not
grind against each other substantially as set forth.
2. The construction of rotary pump shown on the drawing.
Doted this 09-11
1004
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.