Rotary Apparatus for Pumping or Forcing Fluids, also applicable as Motor.
Year: 1892

page_text: Date of Application, 28th Dec., 1892
Complete Specification Left, 28th Sept., 1893-Accepted, 28th Oct., 1893
PROVISIONAL SPECIFICATION.
Rotary Apparatus for Pumping or Forcing Fluids, also applicable
as Motor.
I, CARL HERMANN JAEGER of Leipzig-Gohlis, Germany, Civil Engineer, do
hereby declare the nature of this invention to be as follows:-
My invention relates to a construction of rotary apparatus for either pumping or
forcing fluids, or to be actuated by fluid pressure, wherein a casing composed of
two intersecting cylinders, contains two parallel shafts of which the one carries a
set of radial rectangular pistons that revolve in an annular space in the one
cylindrical part of the casing, while the other shaft carries a drum or cylinder that
fits against the other cylindrical part of the casing, and has formed in it a
corresponding number of recesses into which the said pistons pass as the two
parts revolve in contact, thus producing on the suction side of the casing
gradually increasing spaces and on the delivery side gradually decreasing spaces.
The present improvements have reference mainly to the construction of the
revolving parts, the mode of making them work fluid tight, and the mode of
imparting notion thereto. I will describe my said improvements with reference
to the accompanying drawings, in which Fig. 1 shews a longitudinal section of one
mode of construction, Fig. 2 a cross section, and Fig. 5 a detached section of the
part carrying the pistons, while Figs. 3, 4, and 6 shew the corresponding views of a
modified construction.
In both these constructions the fluid-tight fit of the revolving parts both against
each other and against the casing is effected by surfaces in contact, in place of
partly by mere linear contacts as in constructions heretofore employed.
In both constructions there are three pistons & mounted at equal distances
apart upon a shaft and made to revolve therewith in an annular space a which
is intersected in such manner by a drum f mounted on a shaft gy, parallel to h, that
an arched recess or inward bulge op is formed in the inner cylindrical surface d
of the casing. The drum f is formed with recesses which, on the rotation of the
drum and pistons, serve to receive the latter as they pass round, and which
consequently accurately correspond to the positions of the pistons & revolving
round the shaft g.
The drum fis fixed on shaft which receives rotary motion from the shaft g
through the spur gearing i and i.
The pistons which revolve in the annular cylindrical space a consist of a body k
which, as shewn in the sections Figs. 2 and 4, is in contact with the inner and outer
cylindrical surfaces d d' and which has a length equal to the distance apart of
the end covers n n' of the cylinder. The rotation of these pistons is effected by the
shaft 9, which is connected thereto either at the one end, as at Fig. 1, or at the
middle, as at Fig. 3, by means of annular plates which are fixed on the shaft I and
to which the pistons are fixed. The different mode of connecting the pistons with
their shaft constitutes the main difference between the two constructions.
€
The connection of the pistons & with each other is effected by means of rings b
and which are entirely sunk into the end surfaces or covers n' of the cylinder,
and which, in addition to effecting a perfectly fluid tight fit of the ends of the
pistons, also insure the exact distance apart of the pistons.
According to the construction at Figs. 1, 2 and 5, the two rings are of different
form. The attachment of the pistons thereto is shewn at Fig. 5.
The ring b consists simply of a flat annular plate which, on the rotation of the
piston, slides round in the recess of the cylinder cover n, receiving its motion from
the pistons, while the ring is formed as a disc fitting a recess in the cylinder

page_text: cover n' and having a central boss which is fixed on the shaft g, as shewn at
Fig. 1.
This disc or ring c consequently imparts the rotary motion of the shaft
pistons.
g
to the
According to the second mode of construction shewn at Figs. 3, 4, and 6, the
connection, support, and fluid-tight working of the pistons is effected by means of
two similar rings & which, as in the first construction, are let into recesses in the
cylinder covers n n' but of which neither is connected directly to the shaft g. The
motion is in this case imparted by means of a third circular disc. m which
is fixed on shaft g and fits with its turned periphery accurately against the turned
inner surface of the casing d'.
The connection of the pistons to this disc m is shewn at Fig. 6. On account of
this disc the drum f bas to be formed into two parts, so that at the middle thereof
an annular groove is formed which is filled in with a crescent shaped discs s
gg Fig. 4.
This insertion piece fits on the one hand closely against the inner surface d" of
the lower cylindrical part of the casing and on the other hand against the periphery
of the middle disc m, so as to effect a fluid-tight joint against these parts by means
of comparatively large contact surfaces, so that a contact of the disc m with the
revolving drum f need not be effected; by the above described means the fluid-tight
joint is insured by means of a surface contact instead of only by a linear contact
as heretofore. This is also the case with the arrangement first described, where, on
account of the fluid-tight fit effected by the discs b and c in the recesses of the
covers n and n', a contact between the discs and the lower drum f need not be
effected.
In the construction at Figs. 3, 4 and 6 the rings b, b can in some cases be entirely
omitted.
The action of the apparatus is in both constructions the same; in both cases, on
the rotation of the shafts g, h, the pistons k, in revolving, pass into the recesses
of the drums and by reason of the recess or bulged part o, p, of d, while the
pistons are passing from the pressure side to the suction side in the said recesses,
the cylindrical parts of the drum fit into the said recesses o-p, with a fluid-tight
contact and thereby effectually prevent any communication between the pressure
and suction sides. The number of the pistons and of the recesses I may be varied
according to the special application of the apparatus, the condition being of course
always observed of causing the two parts always to fit and work accurately together
as described.
It will be obvious that the above described apparatus may also be employed as
a rotary motor by admitting fluid pressure on the one side of the casing and
connecting the other side with the exhaust or discharge.
Dated this 28th day of December 1892.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Rotary Apparatus for Pumping or Forcing Fluids, also applicable
as Motor.
I, CARL HERMANN JAEGER of Leipzig-Gohlis, Germany, Civil Engineer, 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 :-
My invention relates to a construction of rotary apparatus for either pumping
or forcing fluids, or to be actuated by fluid pressure, wherein a casing composed
of two intersecting cylinders, contains two parallel shafts of which the one
carries a set of radial rectangular pistons that revolve in an annular space

page_text: in the one cylindrical part of the casing, while the other shaft carries a drum or
cylinder that fits against the other cylindrical part of the casing, and has formed
in it a corresponding number of recesses into which the said pistons pass as the
two parts revolve in contact, thus producing on the suction side of the casing
gradually increasing spaces and on the delivery side gradually decreasing spaces.
The present improvements have reference mainly to the construction of the
revolving parts, the mode of making them work fluid tight, and the mode of
imparting motion thereto. I will describe my said improvements with reference
to the drawings filed with the Provisional Specification in which Fig. 1 shews a
longitudinal section of one mode of construction, Fig. 2 a cross section, and Fig. 5
a detached section of the part carrying the pistous, whilst Figs. 3, 4 and 6 shew the
corresponding views of a modified construction.
In both these constructions the fluid-tight fit of the revolving parts both against
cach other and against the casing is effected by surfaces in contact in place of
partly by mere linear, contacts as in constructions heretofore employed.
In both constructions there are three pistons k mounted at equal distances
apart upon a shaft g and made to revolve therewith in an annular space a which
is intersected in such manner by a drum f mounted on a shaft g, parallel to h, that
an arched recess or inward bulge op is formed in the inner cylindrical surface d
of the casing. The drum f is formed with recesses which, on the rotation of the
drum and pistons, serve to receive the latter as they pass round, and which.
consequently accurately correspond to the positions of the pistons & revolving round
the shaft g.
The drum fis fixed on shaft which receives rotary motion from the shaft g
through the spur gearing i and i¹.
The pistons which revolve in the annular cylindrical space a consists of a body k
which, as shewn in the sections Figs. 2 and 4 is in contact with the inner and outer
cylindrical surfaces d d' and which has a length equal to the distance apart at the
end covers n n¹ of the cylinder. The rotation of these pistons is effected by the
shaft g, which is connected thereto either at the one end, as at Fig. 1, or at.
the middle as at Fig. 3, by means of annular plates which are fixed on the shaft g,
and to which the pistons are fixed. The different mode of connecting the pistons.
with their shaft constitutes the main difference between the two constructions.
The connection of the piston k with each other is effected by means of rings b
and c which are entirely sunk into the end surfaces or covers n n¹ of the cylinder,.
and which, in addition to effecting a perfectly fluid tight fit of the ends of the-
pistons, also ensure the exact distance apart of the pistons.
According to the construction at Figs. 1, 2 and 3 the two rings are of different
form. The attachment of the pistons thereto is shewn at Fig. 5. The ring b
consists simply of a flat annular plate which, on the rotation of the piston, slides.
round in the recess of the cylinder cover n, receiving its motion from the pistons,
while the ring c is formed as a disc fitting a recess in the cylinder cover n'
and having a central boss which is fixed on the shaft g as shewn at Fig. 1.
2'
This disc or ring e consequently imparts the rotary motion of the shaft g to the
pistons. According to the second mode of construction shewn at Figs. 3, 4 and 6.
the connection, support, and fluid tight working of the pistons k is effected by
means of two similar rings 6 which as in the first construction, are let into recesses
in the cylinder covers n n' but of which neither is connected directly to the shaft g..
The motion is in this case imparted by means of a third circular disc m which is
fixed on shaft g and fits with its turned periphery accurately against the turned
inner surface of the casing d¹.
The connections of the pistons k to this disc m is shewn at Fig. 6. On account
of this disc the drum f has to be formed into two parts, so that at the middle.
thereof an annular groove is formed which is filled in with a crescent shaped
discs & Fig. 4. This insertion piece fits on the one hand closely against the
inner surface d of the lower cylindrical part of the casing and on the other hand
against the periphery of the middle disc m, so as to effect a fluid tight joint against.

page_text: these parts by means of comparatively large contact surfaces, so that a contact of
the disc m with the revolving drum need not be effected; by the above described
means the fluid tight joint is insured by means of a surface contact instead of only
by a linear contact as heretofore. This is also the case with the arrangement first
described, where, on account of the fluid tight fit effected by the discs b and c in the
recesses of the covers ǹ and n¹ a contact between the discs and the lower drum f
need not be effected.
In the construction at Figs. 3, 4 and 6 the rings b, b, can in some cases be
entirely omitted.
The action of the apparatus is in both constructions the same in both cases,
on the rotation of the shafts g, the pistons k, in revolving, pass into the recess
of the drums and by reason of the recess or bulged part o. p, of d, while the
pistons are passing from the pressure side to the suction side in the said recesses,
the cylindrical parts of the drum ffit into the said recesses o. p with a fluid tight
contact and thereby effectually prevent any communication between the pressure
and suction sides. The number of the pistons and of the recesses I may be varied
according to the special application of the apparatus, the condition being of course
always observed of causing the two parts always to fit and work accurately together
as described.
It will be obvious that the above described apparatus may be also employed as a
rotary motor by admitting fluid pressure on the one side of the casing and connecting
the other side with the exhaust or discharge.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I hereby declare, that
what I claim is :-
1. A rotary apparatus for pumping or forcing fluids in which the fluid tight fit
is effected by surfaces in contact, the pistons k revolving in an annular space a
being connected by means of rings b and c and caused to rotate by ring c mounted
on driving shaft both rings and c being sunk into the end surfaces or covers of
the cylinder so that a contact with drum f for the sake of a fluid tight fit need not
be effected, substantially as described and shewn in the drawings Figs. 1 and 2.
2. In such apparatus the modification consisting in disc m fixed on shaft g and
intersecting drum which in this case is provided at its middle with an annular
groove filled in with an insertion piece so as to effect a fluid tight joint,
rings 6 and being alike substantially as described and shewn in the drawings
Figs. 3, 4, 6.
3. In such apparatus the further modification of connecting the pistons by
several rings for the purpose of resisting a higher pressure, the corresponding
grooves in cylinder f'being filled in by discs s as described and shewn in the drawings.
Dated this 28th September 1893.
C. R. BONNE,
Agent for Applicant.