Improvements in Rotary Pumps.
Year: 1897

page_text: Date of Application, 10th Aug., 1897-Accepted, 2nd Oct.,
1897
COMPLETE SPECIFICATION.
Improvements in Rotary Pumps.
I, NELS IVERSON, Painter, of Grafton, in the County of Walsh, and State of
North Dakota, one of the United States of America, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained by the following statement :-
This invention relates to pumps and is of the class designated as rotary, the
object being to provide a pump having a continuous motion and adapted to force
a continuous stream of water from a well, cistern or other source of supply. The
pump comprises in connection with a sectional and divisible casing, a rotary pump
shaft carrying pistons which move in an orbital path, the pump also embodying
a reciprocating cut off or valve which is actuated by the piston and which is
automatically returned to its normal position by means located within the pump
casing. The detailed objects and advantages of the invention will appear in the
course of the subjoined description.
The invention consists in a rotary pump embodying certain novel features of
construction and arrangement of parts as hereinafter fully described, illustrated
in the drawings and incorporated in the claim hereto appended.
In the accompanying drawings,
Figure 1 is a sectional view of a pump constructed in accordance with the
present invention.
Figure 2 is a similar view showing modified means for returning the cut off
to its normal position.
Figure 3 is a cross section through the pump casing.
Figure 4 is a detail perspective view of the piston.
Figure 5 is a similar view of the cut off.
Similar numerals of reference designate corresponding parts in the several
views.
Referring to the drawings, 1 designates the pump casing which is composed
of two similar sections or members 2, the sections meeting on a central longi-
tudinal line and being provided in their meeting surfaces with annular grooves
or water ways 3 each semi-cylindrical in cross section, the two grooves together
forming a cylindrical or circular water way extending around the piston shaft
as a centre. 4 designates inlet grooves disposed tangentially to the annular
grooves 3, and 5 represents egress or discharge grooves also disposed preferably
tangentially to the annular grooves 3, the water being admitted at 4 and
discharged at 5.
Arranged centrally of the annular water way 3 is the shaft 6 of the piston 7.
The shaft 6 is journalled in the side portions or sections of the casing and is
formed at one end 8 to receive an operating device shown preferably in the form
of a crank 9. The piston 7 consists of a flat plate or disc and it is provided
preferably at diametrically opposite points with blades or wings 10, preferably
cylindrical in cross section and corresponding to and closely fitting in the annular
water way. Each of the blades or wings 10 is provided with one face 11 which
is substantially radial to the axis of rotation of the piston, while the opposite
face 12 of each blade is beveled or oblique and disposed tangentially or substan-
tially so to the periphery of the disc or piston 7 as to act upon the cut off.

page_text: 13 designates the cut off which. is preferably in the form of a flat plate movable
longitudinally in the casing and mounted in oppositely located grooves 14, as
shown. The plate or cut off 13 is adapted to move at one end
across the water way 3 and, to come in contact with the periphery
of the disc or piston 7 and is provided at such end with a laterally projecting cam
lip 15, the beveled or inclined edge 16 of which is adapted to contact with the
oblique surfaces 12 of the blades 10 so that in the rotation of the piston said
blades will operate to reciprocate the cut off in order that they may move past
the inwardly projecting end of said cut off. The casing is grooved or recessed as
indicated at 17 to admit of the necessary movement of the cam lip 15. The cut
off 13 is provided at its rear end with an opening 18 in which is loosely mounted
the free end of a leaf spring 19 fastened at its opposite end within the casing
in any suitable manner, and working in a triangular recess 20 formed partly in
both of the sections of the pump casing.
Instead of providing the cut off with an opening to receive the spring 19, said
cut off may be provided at its rear end with a head 21 movable in a longitudinal
recess 22 in the pump casing and an expansive coned spring 23 may be arranged
in said recess, said spring exerting its tension to force the cut off inward and
maintain the same in its normal position for shutting off the water and preventing
the same from communicating directly between the passages 4 and 5.
In operation rotary motion is imparted to the piston in the direction indicated
by the arrow, and as the blades move in their orbital path the oblique faces
thereof come in contact with the cam lip on the cut off thereby thrusting said cut
off backward. As the blade passes the cut off, the spring exerts its tension to
force the cut off back to its normal position and in such return movement of the
cut off, the advance edge thereof operates against the radial face 11 of the blade,
and is thus prevented from being suddenly thrust back to its normal position so
as to come violently in contact with the periphery of the piston or disc 7, thus
preventing injury to said parts.
By means of the construction above described the water is drawn or sucked
inward through the passage 4 and forced out through the discharge passage 5
and a continuous stream of water is maintained. The two sections of the pump
casing may be secured together by bolts or other suitable fasteners, thus preventing
the admission of air or the escape of water between the meeting faces of the
sections.
It will of course be understood that the pump is susceptible of changes in the
form, proportion and minor details of construction, which may accordingly be
resorted to without departing from the principle or sacrificing any of the advan-
tages of the invention."
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 is:
1. In a rotary pump, a rotating piston, a shaft for imparting motion thereto,
a casing having egress and ingress passages communicating with an annular
passage concentric to the axis of rotation, blades carried by said piston, a cut off
for said annular passage, and means for automatically reciprocating said cut off,
substantially as described.
2. A pump casing formed of two sections meeting on a central longitudinal
line and formed in their meeting surfaces with grooves constituting ingress and
egress passages and an annular water way, in combination with a rotary piston,
blades carried thereby and traversing said annular water way, and an automati-
cally reciprocated cut off for said annular water way, substantially as described.
3. In a rotary pump, the combination with a suitable casing, of a rotary piston,
a cut off, and blades carried by the piston and comprising inclined faces for
automatically reciprocating said cut off, substantially as described.
4. In a rotary pump, a suitable casing having an annular water way and ingress

page_text: and egress passages, in combination with a rotary piston, blades carried thereby
and having inclined surfaces, a reciprocating cut off having an inclined surface
against which said blades operate, and a spring for restoring said cut off to its
normal position, substantially as described.
5. In a rotary pump, the combination with a rotary piston, of blades carried
thereby and embodying inclined faces, a reciprocating cut off having a cam lip
for co-operation with said blades, and a spring for returning said cut off to its
normal position, substantially as described.
6. In a rotary pump, a pump casing, in combination with a rotary piston
mounted therein, blades carried thereby and having inclined surfaces, a recipro-
cating cut off having a cam lip for co-operation with said blades, said cut off
being also provided with an opening, and a spring arranged in a recess in the
casing and having its free end loosely fitted in said opening in the cut off,
substantially as described.
7. In a rotary pump, a pump casing comprising an annular water way and
ingress and egress passages leading thereto, in combination with a rotary piston
comprising a fat disc mounted between the meeting faces of the sections of the
pump casing, blades carried by said dise and having a substantially cylindrical
cross sectional shape, and a cut off arranged in the path of said blades and
adapted to be automatically reciprocated in one direction thereby, substantially
as described.
Dated this 0th day of incon 1907
F. BOSSHARDT & Co.,
4 Corporation Street, Manchester, Agents to Applicant.