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Патент USA US2412877

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Dec. 17, 1946. _
2,412,877
E. M. EVANS ’
FLUID ‘MOTOR
Filed ‘April 12, 1945
4 Sheets-Sheet l
‘
IN VEN TOR.
ZZMZk'ams' ‘
Dec. 17, 1946.
‘E. M. EVANS ‘
2,412,877
FLUID MOTOR
Filed April 12, 1945\
4 Sheéts-Sheet 2
ZMEvana
I N VEN TOR.
Dec. 17, 1946'
2,412,877
E. M. EVANS
FLUID MOTOR
Filed. April 12, 1945
4 Sheets-Sheet 3
lZMZ'vana
INVENTOR
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4770/?4/5 n:- .
Dec. 17, 1945.
E. M. EVANS
FLUID MOTOR
2,412,877
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Filed April 12, 1945
4 Sheets—$heet 4
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2,412,877
Patented Dec. 17, 1946
UNITED STATES PATENT OFFICE
2,412,877
FLUID MOTOR
Eugene M. Evans, Jefferson City, Mo., assignor of
one-?fth to E. J. Tietjen, Je?‘erson City, Mo.
Application April 12, 1945, Serial No. 537,944
2 Claims.
(01. 253-65)
1
2
This invention relates to ?uid motors for actua
tion by liquid or gas, one of the objects being to
provide a motor of this type which is of simple
construction and utilizes, as an essential part
thereof, a casing de?ning a helical passage for ‘the
?ow of ?uid from an inlet to an outlet, said casing
constituting a stator in which a rotor, in the form
of a disk, is mounted for rotation about the axis
of the helix and between the inlet and outlet
invention consists of certain no-vel details of con
struction and combinations of parts hereinafter
whereby ?uid passing through the casing must, of
necessity, flow laterally through the rotor through
more fully described and pointed out ll}; the claims,
it being understood that changes may be made in
the construction and arrangement of parts With
out departing from the spirit of the invention as
claimed.
In the accompanying drawings, the preferred
form of the invention has been shown.
In said drawings:
10
Figure 1 is a top plan view of the motor.
Figure ‘2 is a developed or displayed section
opposed arcuate openings, the rotor being so
shaped and positioned that this lateral ?ow of the
?uid will set up a rotation thereof so that the
rotor thus can be utilized as a driving element.
through the rotor and stator taken through 360
degrees.
,
‘
Figure 3 is a section on line 3-3 Figure 1.
15
Figure ‘l is a section on line 4—-& Figure 3.
Figure 5 is a section on line 5—-5, Figure 4.
A still further object is to combine with the
helical passage a yieldingly restrained valve
whereby the ?ow of ?uid from the inlet through
Figure 6 is a plan view of a portion of the rotor.‘
Figure '7 is a section on line 1--‘! Figure 6.
determined rate, there being by-passing means by 20 Figure .8 is a view on a reduced scale of the in
ner face of the inflow section of the stator.
which the minimum speed of rotation and rate of
Figure 9 is a view of the inner face of the out
?ow can be maintained under idling conditions
but the valve being designed to open automatically
?ow section of the stator, this view ‘also being on
a reduced scale.
or else under the control of the user, thereby to in
crease the rate of ?ow and proportionately in 25 Referring to the ?gures by characters of ref
erence, A designates a casing or stator contain
crease the speed of the rotor.
ing a helical passage l leading from a ?uid inlet
It is a further object of the invention to pro
2 to a ?uid outlet 3 and this passage de?nes a
vide a structure of this character which can be
single convolution. The casing or stator A is‘ di
used for various power purposes. It is also useful
as a means for feeding chemicals into ?uids while 30 vided along a plane perpendicular to the axial
center of the casing so as to divide the casing into
?owing through the casing, the feeding of the
an intake section 4 and an out?ow section 5. The
chemical by rotor-actuated means, being such as
two sections are held securely together by bolts 6
to maintain a predetermined proportion or ratio
or the like extending through marginal ?anges ‘l
during variations in the rate of ?ow and in the
speed of rotation.
35 and the meeting faces of the two sections coop
erate to form a circular recess or working cham
Another object is to provide a structure of this
ber 8.
character which will stand up during long con
Those portions of the helical passage within
tinued use, which will not be a?ected by hard sub
the respective casing sections are closed adjacent
stances, such as sand or grit, which may be di
rected thereinto, and which can be installed in 40 to the recess 8 except for arcuate slots o-r ports
the rotor to the outlet can ‘be maintained ata pre
various positions without impairing its Working
qualities.
, 9 and It which are located directly opposite each
Another object is to provide a power device of
this character containing but few parts and which
can be caused to operate from aminimum ?ow of 45
1/4 square inch at the inlet up to any maximum
other, the port 9 constituting an outlet into recess
8 from the intake section of the casing, while the
port I 0 constitutes a ?uid inlet for the out?ow
section of the casing.
.
‘
Adjacent to the inlet 2 and within the stator is
a valve chamber ll normally- closed by a remov
able cover plate‘ l2, and at the bottom of this
chamber is an inclined seat 13 adapted to be en
mal ?ow rate.
A still further object is to provide a motor of 50 gaged by a flap valve M which is yieldingly held
?ow, subject to the size of the motor, a steady op
eration' being insured up to three times the nor
this type which, while designed primarily for
actuation by liquid, can also be driven by gases
under pressure.
,
>
With the foregoing and other objects in view
which will appear ‘as the description proceeds, the 55
to its seat by spring l5. A by-pass it is located
back of the seat I3 and maintains constant com
munication between the inlet port 2 and the re
cess 8.
,
A disk I’! constituting a rotor is positioned for
2,412,877
4
3
at a greatly reduced speed, and occurs only when
the ?uid entering the inlet tube is of small vol
ume and has a low rate of flow. As the .rate of
of transverse openings l8 separated by parallel
?ow increases and the pressure against the closed
inclined blades l9 all these openings being located
valve proportionately increases, said valve will be
where they will move successively between and
opened a distance dependent upon the pressure
close to the arcuate ports 9 and It. The blades
thereagainst and as the valve opens, ?uid is re
H! are pitched to impart rotary motion to the disk
leased past the valve so as to partly or entirely
i‘! when ?uid is directed against the blades from
?ll the intake section 4 of the helical passage and
the by-pass l6 and also when released by the
opening of valve 14.
19 from this intake section this released ?uid will be
directed through the arcuate outlet port 9 against
For the purpose of indicating the position of
the valve It the pivot pin 2!] on which it is' "all of the blades I9 exposed within said port.
free rotation within the recess 8 and is provided,
adjacent to its periphery, with a circular series
mounted, rotates therewith. One end of this pin 7 f Thus the rotor will be driven at an accelerated
speed and the ?uid passing between the blades
is extended outwardly from the wall of the chamber H and carries an index or pointer 2| which 15 will be received by the arcuate port l0 and de
livered into the out?ow section of the helical
is located where it can be viewed by the attendant.
. passage.
As the speed of rotation increases due
Disk I1 is secured to a shaft 22 journaled in a
to the increased ?ow of ?uid against the rotor,
suitable bearing 23 and also within the upper and
the delivery of a chemical into the outlet 3 will
lower walls of a transmission housing '24 which is '
carried by the stator or casing A. Mounted on 20 proportionately be increased so that a predeter
mined ratio thus will be maintained. As the ?ow
this shaft within the housing is a drive screw or
in port 2 diminishes, the valve I3 will gradually
worm 25 which is in constant mesh with the worm
gear 28 secured to a cross shaft 21 carrying an
move toward its closed position with a corre
sponding reduction of the speed of the rotor.
eccentric 28 in the form of a pin which is off
center and in engagement with one end of a con 25 The arcuate intake port I0 extends through ap
necting rod 29. This connecting rod is pivotally
proximately 345 degrees, while the port 9 opening
joined, as at 30, to a shank 3i mounted for recip
rocation in the base 32 of a housing or casing 33.
This housing or casing has a head 34 provided
thereinto extends almost the same distance, the
faces of the two sections 4 and 5 overlapping'only
at the points b and 0 between the ends of the
with an outlet port 35. The movable end 36 of a 30 ports and at opposite sides of the rotor. Thus
bellows pump 31 is joined to the shank 3| while
any vacuum which might be created at the point
the opposed or stationary end of the bellows, in—
of in?nity of the meeting tapered portions of
dicated at 38, is ?xedly secured to the head 34 and
has an outlet 39 opening into the port 35. Port
the helical passage is overcome.
.
,
'
Attention is called to the fact that by providing
35 constitutes a connection between in?ow tube 35 a helical passage, the arcuate port 9 is extended
40 and anout?ow tube 4i and it is to be under
substantially throughout the circumference of the
rotor and the same likewise is true of the intake
stood that the out?ow tube 4| can be extended to
and open into the ?uid outlet 3 of the stator. A
As the two portions of the helical passage at
check valve can be located at any suitable point
in the tube 40 as indicated at 42 so as to prevent 40 opposite sides of the rotor are duplicates, ?uid di
rected from one to the other through the rotor
return ?ow of ?uid within'said tube. Another
will ?ow freely without creating any back pres
check valve 43 can be located in the tube 4| for
sure so that unrestrained movement of the rotor
the purpose of preventing return ?ow of ?uid
is thus insured. Furthermore, the actuation of
after it has been forced into said tube 4|. An
45 the rotor in itself serves to throw the impelling
additional check valve 44 can be located in tube 4|
?uid frombetween the blades and into the out
adjacent to the outlet end thereof.
arcuate
vport
It.
‘
'
I
V
_
>
'
?ow section of the stator so that the rotor thus
The apparatus herein described is designed
becomes self-clearing.
,
,
.
primarily as a chemical feeder although, as has
What is claimed is:
_
‘ '
already been stated, it can be used as a power de 50
1.,A ?uid motor including a stator having a
vice or motor for other purposes. When used as a
chemical feeder, the pump formed by the bellows
3'! is successively expanded and contracted so that
the chemical to be fed into the ?uid passing
through the stator, will be successively sucked 55
helical passage therein provided with an inlet and
an outlet at respectiveends thereof, said stator
being divided atthe center of the passage along
a plane perpendicular to the axial center of the
passage, thereby to provide an in?ow sectionand
through the tube 40 into the bellows and ex
an opposed out?ow section, each of said sections
pelled from the bellows into the tube 4| from
having an arcuate port extending through ap
which it will be discharged into the outlet 3. As
proximately 345 degrees, and a disk mounted for
thisbellows is operated by the rotation of shaft
21 which, in turn, receives its motion from the 60 rotation between and coaxial with the ports, said
disk having a circular series of spaced blades
rotor I‘l, it is to be understood that the amount
pitched to successively receive the impact of ?uid
of chemical expelled into the outlet 3 can be main
?owing from the in?ow section to the out?ow sec
tained constantly at a predetermined ratio to the
tion,
that portion of the helical passage in one
rate of ?ow of the ?uid within the stator.
section being tapered off from the inletof the
Fluid entering the inlet 2 will be discharged 65
stator to the remote end of the arcuate port in
continuously in the form of a small jet, through
said section and that portion of the helical pas
the by-pass l6 and the impact thereo; against the
sage in the out?ow section being. tapered off in;
adjacent inclined blades [9, will obviously cause
wardly from the outlet port of the stator tothe
the ,rotor'to travel in the direction indicated by
remote
end of the arcuate port of said out?ow
the arrow at in Figure 2. The ?uid ?owing against 70
section, and a spring-restrained valve within the
and passing between these blades will thus be de
helical passage adjacent to the inlet of the sta
livered into the outlet [9 and ultimately be de
tor and normally spaced between the ends of the
livered through the discharge end of the out?ow
arcuate
port in the in?ow section of the stator,
section 5. Thus constant rotation of the rotor
is insured although this'normal rotation- will be 76 there‘. being a by-pass for maintaining constant
communication ‘ between said inlet port of the
5
2,412,877
stator and the rotor, thereby to maintain constant
motion of the rotor under the action of ?uid en
tering the inlet of the stator.
2. A ?uid motor including a stator having‘ a
helical passage therein provided with an inlet
and an outlet at respective ends thereof, said sta
tor being divided at the, center of the passage
along a plane perpendicular to the axial center
of the passage, thereby to provide an in?ow sec- »
tion and an opposed out?ow section, each of said
sections having an arcuate port extending
through approximately 345 degrees, and a disk
mounted for rotation between and coaxial with
the ports, said disk having a circular series of
spaced blades pitched to successively receive the
impact of ?uid ?owing from the in?ow section to
the out?ow section, that portion of the helical
passage in one section being tapered off from the
inlet of the stator to the remote end of the arcu
6
ate port in said section and that portion of the
helical passage in the out?ow section being
tapered off inwardly from the outlet port of the
stator to the remote end of the arcuate port of
said out?ow section, and a valve within the heli—
cal passage adjacent to the inlet of the stator and
normally spaced between the ends of the arcuate
port in the in?ow section of the stator, there be
ing a by-pass for maintaining constant communi
cation between said inlet port of the stator and
the rotor, thereby to maintain constant motion of
the rotor under the action of ?uid entering the
inlet of the stator, and a spring positioned to re
sist movement of the valve from its seat, said
spring being proportioned to permit movement of
the valve from closed position in proportion to the
pressure of fluid against the valve.
EUGENE M. EVANS.
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