Improvement in Rotary Pumps.
Year: 1897

page_text: Date of Application, 8th Sept., 1897--Accepted, 30th Oct., 1897
COMPLETE SPECIFICATION.
Improvement in Rotary Pumps.
I, BRUNO KAISER of Siebenhufener Strasse 2211, Breslau, Germany, Inventor,
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:―
The object of the present invention consists of a rotary double-acting pump,
distinguished by two spring pistons moved by a disk which receives a rotary
movement from a shaft to which it is wedged, the two pistons remaining, in their
movement, constantly in contact with the interior cylindrical surface of a fixed
cylindrical box constituting the body of the pump.
In the annexed drawings which illustrate my invention :-
Fig. 1 represents a vertical section of the apparatus on the line M, N of Fig. 2.
Fig. 2 shows a vertical section of the pump in plane passing through its axis.
Fig. 3 is a reproduction of Fig. 1 in which the disc of the pistons is omitted.
Fig. 4 is an elevated interior view of the cover of the apparatus.
Fig. 5 is a vertical section of the same organ, according to a plane passing
through its axis.
Fig. 6 represents an elevated view of the moving disk of the piston.
Fig. 7 is a vertical section of the same in a plane passing through its axis.
Fig. 8 represents one of the two spring pistons in an elevated and a vertical
section.
The pump is composed of a cylindrical chamber a; in cast iron, having a
circular opening B at its centre which allows the passage and the guiding of the
rotary shaft of the pump. Two tubes D and D¹ cast to the cylindrical box puts
this box which constitutes the body of the pump into communication, the first
with the suction pipe, the second with the forcing pipe.
The box a has a circular flange to which is bolted a cover 6 having towards the
inside a hollow cylindrical projection E forming the conducting ring, as will be
seen hereafter, cast on it, and excentric, as regards the hole made in the centre of
the cover for the passage of the rotation axle of the pump. The cover b is supplied
with packing to produce a perfect tightness at its joint with the body of the
pump a and the transmission shaft which penetrates into this, in order to have a
complete tightness, traverses a stuffing-box S jointed or cast upon the cover whilst
the inside extremity of the same rotation shaft is supported and lodged in a water
tight box S¹ jointed or cast upon the pump body.
Near the rear wall of the box a a disk c is arranged with two cylindrical pro-
jections c and c³ cast upon it: the one at its periphery, the other near the centre.
he latter wedged upon the shaft A.
The projection c¹ forms the nave of the disk c whilst the projection
forms the
im of it. This rim serves, at the same time as the moving of the pistons, to
nterrupt the direct communication between the tubes D and D' by its friction
gainst the separating wall D³ of the said tubes.
This rim at the same time assures the suction of the pistons,

page_text: In two grooves diametrically opposed R and R¹ made in the disk and its extreme
cylindrical projection, two pistons d and dare engaged; these pistons have a
parallelopiped form; they have each a circular cavity directed according to the
radius of the disk and in which a spring r is fixed, which presses on one part, upon
a tappet constantly in contact during the rotation, with the cylindrical surface
of the fixed ring E and which pushes, on the other hand, the bottom of the cavity,
that is to say, the piston itself, causing this to apply itself constantly upon the
interior cylindrical surface of the pump body a.
In rotating motion of the shaft A, it is easy to understand that the volume
displaced by the movement of each of the two pistons d and will be equal to
the space comprised between the interior cylindrical surface of the pump body a, the
exterior cylindrical surface of the first conducting ring E, the 2 bottoms of the
body of the pump, the piston and the contact surface of the rim and of the side D³.
The water, being sucked by the tube D), is forced by the tube D¹ into the forcing
tube without the aid of a flap or a valve.
The two pistons d and have their exterior surface covered with bronze r, to
avoid the wearing of the friction parts. The pump body is supplied with flanges
cast to it and serving to attach it to a wall or any construction whatever. The
shaft A may be at pleasure worked by hand or by means of a 'transmission.
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:-
A rotary double acting pump, which may be worked by hand or by means of any
motive power, distinguished by two spring pistons put into a rotary motion around
a shaft by a disk wedged upon this shaft, the two pistons remaining in their move-
ment, constantly in contact on one hand, with the interior cylindrical surface of a
cylindrical box constituting the pump body where the sucking and forcing tubes
are branched, and on the other hand with the exterior cylindrical surface of the
conducting ring E fixed to the cover of the pump body, the rim C of the moving
disk assuring the suction of the pistons, substantially as described.
Dated this 7th day of September 1897.
L. DUVINAGE,
Agent for Applicant.