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Патент USA US2112889

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_ April 5, 1938.
A. G, GRONDAHI.
2,112,889
WATER WHEEL WITH VERTICAL AXIS
Filed Feb. 24, 1937
2 She'eÍS-Shee‘ll l
April 5, 193s.
A. GfG‘RONDAHL
2,112,889
WATER WHEEL WITH VERTICAL AXIS
Filed Feb. 24, 1937
.
l 17615.
,
2 Sheets-Sheet 2
2,112,889
Patented Apr. 5, 1938
UNITED STATES sATENT OFFICE
Application February 2 4, 1937, Serial N0. 127,394
6 Claims.
(Cl. _170-121)
This invention relates to apparatus for devel
oping power from a flowing stream, and more
particularly to apparatus of this kind which is
adapted to develop power from the surface water
of a flowing stream, instead of from any drop or
fall therein.
Generally stated, the object of the invention
is to provide a novel and improved construction
and arrangement whereby a water wheel is dis
posed with its axis extending vertically, at one
An opening I2 may be provided in the side of the
wharf or float, through which the blades pass, and
While the blades are passing through the-‘water
under the wharf or float, they swing upwardly, as
shown in dotted lines lin Fig. 6 of the drawings. .
This is because the front surface I3 of each blade
is opposed to the water, and the latter forces the
blade upward into said position shown in dotted
lines,` so that the blades thus move horizontally
through the water with a minimum of friction l
side of the stream, or even in the middle thereof,
and resistance, and then drop down into vertical
so that the latter strikes the blades of the wheel,
at one side of the latter, causing the latter to
rotate about said vertical axis.
It is also an object to provide certain details
15
and features of construction and combinations
tending to increase the general e?ciency and de
sirability of a water power apparatus of this
position again as soon as they move outwardly
particular character.
To these and other useful ends, the invention>
consists in matters hereinafter set forth and
claimed and shown in the accompanying draw
ings, in which
Fig. l is a perspective of a water power appa
ratus embodying the principles of the invention.
Fig. 2 is an enlarged plan view of said appara
tus.
Fig. 3 is an enlarged vertical section on line
3_3 in Fig. 1 of the drawings.
Fig. 4 is a perspective of one of the blades of
the water wheel.
Fig. 5 is a similar view, showing the two por
tions of the blade separated.
Fig. 6 is an enlarged detail section on line 6-6
in Fig. 4 of the drawings.
As thus illustrated, the invention comprises a
vertical shaft I, mounted in bearings 2, secured,
for example, to the side of a wharf or platform 3,
of any suitable or desired character. Or, if de
sired, the support for the shaft may be a ñoat
anchored in the middle of the stream.
As shown in Figs. 3 to 6 inclusive, the vertical
shaft I is provided with a hub portion 4, having
sockets 5 for the downturned end portions 6 of
45 the radial arms 1, which latter support the blades
8 of the wheel. It will be seen that these blades
8 are hinged to the arms 1 at 9, in such a man
ner that when the blades hang down, as shown
in Fig. 6, they are held against upward movement
by the lugs I0, which serve as stops. In the
other direction, the blades are free to swing up
wardly until they are practically horizontal.
In operation, the water of the flowing stream
strikes the rear surface I I of the blades that pro
ject into the stream, causing the wheel to rotate.
from the opening I2 and into the stream of flow
ing water.
Any suitable means, such as a shaft I4, gear 15.»
connected to the upper end of the shaft I, can be
used as a power transmitting means to convey
power from the water wheel to any desired ma
chinery or apparatus.
Thus, the invention is adapted to be used in 20
places where there is practically no drop or fall
in the stream, so that the power must be de
velope-d from the surface water of the stream, and
for this purpose the apparatus is comparatively
inexpensive to construct and install, and is easily
accessible for the purpose of repairs. Each blade
and its arm are removable as a unit from the
hub on the shaft by simply lifting the blade and
arm upwardly.
~ With the construction shown and described, it
will be seen that the water wheel can be assem
bled where installed, very readily, and that it can
be taken apart, if necessary, while the shaft re
mains in its bearings. In this way, the wheel can
be assembled in the water, if necessary, and if
blades are broken or damaged, they can be sepa
rately removed and replaced by new ones, with
out the necessity of removing the shaft from its
bearings.
40
What I claim as my invention is:
1. In a water power apparatus, for use in a
horizontally flowing stream, the Combination of
a vertical shaft, radial blades forming a water
wheel carried by said shaft, said blades being
separately attachable and detachable at points of 45
support on said shaft at their inner ends, said
points of support having vertically disposed sock
ets, with means held by gravity in said sockets
and prevented from turning therein and upward
ly removable therefrom, so that the wheel may be
assemble-d or taken apart where installed, and
means for supporting said shaft and said wheel
_in a flowing stream, each blade being hinged to
assume by gravity a vertical position while mov
ing down stream,'with means to maintain said 55
2,112,889
vertical position against the pressure of the Wa
ter on the face thereof, and to assume by pressure
of the water on the rear side thereof a substan
tially horizontal position while moving through
Gl water at vthe other side of the wheel.
'
2. A structure as specified in claim 1, said sup
porting means comprising a stationary wharf or
other structure having an opening in the side
thereof, parallel with the current of the stream,
10 through which opening the blades of the wheel
extend, so that the power blades extend into the
stream, while the returning blades are beneath
and under cover of said structure, the latter hav
ing bearings above and below said opening on the
vertical outer side thereof for said shaft.
3. A structure as specified in claim 1, said shaft
having a hub provided with vertical sockets, and
said blades having arms provided with bent inner
end portions for insertion in said sockets, togeth
er with means to prevent said bent portions from
turning in their sockets, so that any blade and
its arm-can be removedupwardly as a unit.
4. Astructure as specified in claim 1, each blade
having a radial arm which is rigid with the shaft,
25 but removable therefrom, having separable means
holding the arm against rotation about its longi
tudinal axis, with the upper edge of the' blade
hinged to said arm, and with stops forming said
means to hold the blades vertically while moving
down stream with the Water, but permitting the `
blades to assume substantially a horizontal posi
tion While moving in an upstream- direction.
5. In a water power apparatus for use in a hori
zontally flowing stream, the combination of a
vertical shaft, a hub on said shaft with vertical
sockets formed in said hub, radial arms assem
bled around said hub, vertical members rigid with
the inner ends of said arms and adapted for in
sertion in said sockets, power blades carried by
said-arms, the relative formation of the hub and 15
said vertical members being adapted to hold the
latter against turning in the sockets, to keep the
arms radial.
v
6. A structure as specified in claim 5, said rela
tive formation comprising notches formed in the 20
hub at the upper ends of said sockets, the inner
end portions of said arms resting in said notches,
and bearings for supporting said shaft.
ALFRED G. y GRONDAHL.
25
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