Pump or Motor Page: 3 of 4
[1], 3 p. : ill. ; 23 cm.View a full description of this patent.
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1,394,861
core also extends through the end wall 19
of the rotor and has a stationary gear 24
rigidly secured on or integrally formed
therewith. The rotor - also carries stub
5 shafts 25 on which are rotatably mounted
intermediate power transmitting gears -26.
It is desired to rotate the pistons at the
same speed, and at one half the speed of ro-
tation of the rotor, the piston gears 23 are
10 of the same pitch diameter. If they lie in
the same transverse plane as the stationary
gear 24, and if the gears 26 are simple ones
then the pitch diameter of the gears 23 must
be twice that of the gear 24 and the pitch
15 diameter of the gears 26 is immaterial.
The same result is accomplished by making
the gears 26 with two portions of different
pitch diameters, one meshing with gears 23
and the other with gear 24 and in that event,
20 the gears 23 will be less than or greater than
twice the gear 24 by an amount varying with
the difference in the pitch diameter of the
two portions of each gear 26. For instance,
gears 23 and 24 may all be. the same size if
25 the portion of each gear 26 meshing with
gear gear 23 is one half the pitch diameter
of the portion of each gear 26 meshing with
gear 24.
Each gear 26 meshes not only with the
30 stationary gear 24 but with two adjacent pis-
ton gears 23. There are the same number of
intermediate or power transmitting gears 26
as there are piston gears 23 and by means of
my novel construction, each intermediate
35 gear transmits power to or through two ad-
jacent piston gears and the rotation of each
piston gear about its axis is controlled by
two separate and independent intermediate
gears 26, both of which mesh therewith and
X10 both of which mesh with the stationary
gear 24.
I have shown the design of pump or mo-
tor in .which there are three piston mem-
bers 21 and a corresponding number of
'5 piston gears, intermediate gears, and- filler
blocks 20, but it will of course be evident
that I do not wish to be limited in any way
to this number as a smaller or larger num-
ber may be employed with appropriate
50 change in the relative proportions of the
parts.. With any such change, it will of
course be evident that the. piston gears must
always be of twice the diameter of the sta-
tionary gear.
55 The gears.26 may be mounted on any suit-
able member or carrier rotatable about the
axis of the machine. For instance, the stub
shafts 25 may be mounted on the end wall
19 of the rotor or on a gear casing 27
60 which is" rotatable with the rotor or they
may be mounted in both. Various means
may be provided for the transmission of
power to or from the rotor and its pinions.
Merely as one example of means for trans-
45 mitting power to or from the member 27, Ihave shown the gear casing 27 secured to
the wall 19 by flanges 30 and keyed to a
shaft 28 journaled in the core 12 of the cas-
ing, said shaft being provided with a belt
pulley 29. If the machine be used as a 70
pump or compressor, power is transmitted
to the machine through the pulley 29 and
shaft 28 to cause the gear carrier to posi-
tively rotate. This carries with it the inter-
mediate or power transmitting gears 26 75
which are likewise caused to rotate in the
same direction as the shaft 28 by reason of
their meshing engagement with the station-
ary gear 24. As they bodily move around
the axis of the machine they carry with so
them the piston gears 23 and the rotor, and
cause said .piston gears and the pistons to
rotate about their own axes in the rotor at
one half the speed of the rotor, and in the
reverse direction to the direction of rota- s5
tion of the rotor. Each piston in moving
through the wide portion of the .annular
passage carries along a fluid, the return of
fluid through the narrow portion of the an-
nular passage being prevented by the filler 90
blocks and pistons, which continuously close
it. If the device be used as a motor,
the pressure of the fluid acting on the pis-
tons will cause. them to move through the
wide portion of the annular passage and 95
this bodily movement of the pistons will
cause a rotation of the rotor, and a corre-
sponding rotation of the gear carrier 27.
The stub shafts 25 preferably connect the
rotor and the gear casing 27, and independ- 100
ent connecting means, such .as the flanges
30 are also employed. The shaft 28 is shown
merely as one means for receiving power
from or delivering it to outside mechanism.
It will be noted that the gears 23 and the 105
gears 26 make up a continuous annular se-
ries, each gear meshing with the one ahead
as well as the one behind it. In case any
one of the gears 26 should become broken
or excessively worn, or should be tempo- 110
rarily removed, the machine may still be op-
erated. If there are more than three pis-
tons, it will be evident that even more than
one of the gears 26 may fail to function
properly without interfering with the op- 115
eration of the machine. as a whole. Any
irregularity of any one of the gears will be
counteracted by another gear due 'to the
double transmission through each gear 26
and the double transmission to each gear 23. 120
I have shown the stationary .gear 24 as be-
ing at the center of the annular series or
train, of gears. This is essential where such
stationary gear must be of one half the.
pitch diameter of the piston gears 23 as in 125
the. specific construction illustrated, but it
will of course be evident that in-some con-
structions where a very much faster rota-
tion of the gears 23 is desired, the' station-
ary gear while still remaining co-axial with 1302
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Reference the current page of this Patent.
Reaugh, Fran. Pump or Motor, patent, October 25, 1921; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258873/m1/3/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.