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Патент USA US2125988

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‘ Aug. 9, 1938.
c. E. BROMAN
2,125,988
PUMP OR MOTOR STRUCTURE
Filed May 16, 1936
?rings.
INVENTOR;
BYGh arZeJ IE’. Brornm
ATTORNEYS;
" 2,125,988
Patented Aug. 9, 1938
PATENT OFFICE
UNITED STATES
I
2,125,988
PUMPIOR, MOTOR STRUCTURE’
Charles E. Broman, Algoma Township, Kent
County, Mich.
Application May 16, 1936, Serial No. 80,065
4 Claims. (Cl. 103—136)
-
The present invention relatesv to rotary pump
or ?uid-driven motor structures; and its object
is, generally, to provide such a structure improved
in respects hereinafter appearing; and particu
5 larly, to ‘provide such ‘a structure which shall
operate continuously, and very steadily and noise
lessly; and further, to provide such a structure in
which the driving power is exerted with great ef
feet; and further,v to provide in such a structure
10 a well balanced rotor; and further, to provide
such a structure in which friction may be dimin
ished; and further, to providev such a structure
having a circuitous channel comprising angularly
disposed portions into which the ?uid is continu
15 ously and simultaneously admitted into operative
contact with the pistons therein and from which
’
(5
has in its inner side a circular concentric recess
bearing l0. From'the bottom ll of the casing’s
chamber 3 a member I2 extends outwardly hav
ing a journal bearing l3.
'
This member l2, as shown, is formed of a sepa
rate piece seated in a curved rabbet l4 and is
held in place by pins or screws l5. Said mem
ber’s curved inner side and the curved side of the
casing form the circuitous chamber 3 between
them of uniform width throughout. One portion
,of this chamber extends from the rotary axis of
the structure farther than the opposite portion
thereof extends. To effect this, the chamber is
approximately ovate having a portion I6 whose
parallel circular sides ll, l8 are spaced nearer 15
said axis than are the circular sides i9, 20 of the
the ?uid is vented in like ‘manner; and further, ' chamber’s opposite portion 2 l, these circular por- '
to provide such a structure wherein the pistons
are moved by the structure's operation into said
portions of the channel alternately; and further,
to provide in such a structure improved pistons.
‘ These and any other and more speci?c objects
hereinafter appearing are attained by, and the
invention ?nds preferable embodiment in, the il
-25 lustrative structure particularly‘ described in the
body'of this speci?cation and illustrated by the
accompanying drawing, in which:-'
Figure 1 is an elevational view of a pump or
motor structure embodying my invention, with
30 the ?uid intake pipe removed;
.
‘Figure 2 is a right hand-side view of the struc
ture with the cover plate removed;
rib or ?ange 29 bearing on the bottom of the cas
lng’s chamber 3. The outer curved side 3|] of the I
rotor’s said rib is adjacent and as shown rotatably
30
bears on the circular side I] of portion I6 of said
chamberw'while the inner curved side 3| of said
'
Figure 3 is a sectional view of the same, with
the cover plate in place, taken on the diametrical
line 3-3 of Figures 2 ‘and 4;
Figure 4 is a sectional View thereof taken on
line 4-4 of Figure 3;
40
tions being concentric and connected by elliptical
portions 22 of the chamber.
The shaft 23 rotatably bears at 24, 25 inthe 20
casing l and in its cover plate 6 and extends
tightly. through the concentric circular rotor 26
keyed thereto. The rotor’s ?at outer side rotat
ably bears in the cover plate’s recess lll,'its hub
portion 28 hearing in bearing H of the member 25
l2, and its inwardly extending concentric circular
rib is adjacent and as. shown rotatably bears on
the circular side IQ of the chamber’s opposite
portion 2|.
The rotor carries pistons extending across and
?tting in the chamber. These pistons 32 as
35
- shown'in Figures 2, 3, 4 and 7 are of cylindrical
Figure 5 is a‘sectional view of the same taken -‘ - form (hollow to minimize weight) ?ttingly seated
on line 5-5 of Figures 1 and 3;
,
and turnably bearing in openings or gaps 33 40
Figure‘? is a right hand-side view, .with the
cover plate removed and certain parts broken
‘ away to~show a modi?ed construction of the
‘pistons;
Figure 'l is a right hand-side view similar to
Figure 2 but showing a slightly modi?ed construc
tion in whichthe ?uid intake is in another angu-v
lar position.
-
through said rib. These pistons’ diameters equal
the width of the chamber and of said openings,
in which they .are freely moved or “cammed”
radially of the rotor by the chamber’s portions
22 into or out of its said circular portions It
or 2| so as to hear at their opposite sides on
the opposite curved sides of the chamber in all
rotated positions of the rotor, their ends bearing
The body or casing l of the pump or motor‘ ' on the ?at bottom of chamber 3 and on the ?at
structure illustrated v,by the drawing mounted
inner side of the rotor.
'50 as by bolts 2 on a suitable base has a chamber
It will be seen thatthe’cha-mber’s circular por
3 with ?uid intake port 4 and discharge port 5
tions it and 2| form semicircular fluidlchannels
‘in which the ?uid passes along the inner side of
ably held in place by'screws ‘I. This cover plate, the rotor’s rib in channel 16 and alongv therib’s
has an inwardly extending circular rib 8 ?tting
outer side in channel 2|, the ?uid passing along
and provided with a circular cover plate 6 remov
55 inside the concentric ?ange 9 of the casing, and
55
2
2,125,988
both sides of the rib in the portions 22 of the
chamber.
By passages branching between the structure‘s
intake port 4 and discharge port 5 the ?uid is
continuously admitted to and vented from both
of said opposite portions I 6, 2| of said chamber.
Into one of these passages the ?uid is admitted
at its inlet 35 from the structure's intake port 4
directly into portion 2| of the chamber through
10 its curved outer side and operatively contacts
that side portion of the pistons‘ which extends
outwardly from the rotor's rib 29 into said por
tion 2|, from which portion the ?uid is vented
at 36 into the structure’s discharge port 5.
16
The other passage admits ?uid from its inlet
. 31 from the structure's intake port 4 whence it
passes into this passage’s portion 38 and semi
circular portion 39 in the casing behind the mem
ber l2 and thence through said member’s opening
40, which extends from its ?at bottom 4| through
its curved side, into the chamber’s portion I6
wherein the ?uid operatively contacts, that side
‘portion of the pistons which'extends inwardly
from the rotor's rib 29 into the chamber’s said
portion Hi, from which the ?uid is vented through
said passage’s opening 42, which extends from
the curved side of member vl2 through its bottom,
and through the semicircular portion 43 and por
tion .44 of said passage in the casing behind mem
ber I2 and is vented at 45 into the structure's dis
charge port 5.
Themember l2 thus forms a transaxial par
tition between chamber 3 and the passages be
hind this member.
'
'
In Figure 6 pistons 321 of a usual form are
shown extending through the rotor's rib 29 and
turnably mounted at their smaller ends.
In Figure 7 the structure's intake pipe 501 is
’ disposed at an angle of about 30 degrees above
the intake pipe 50 of other views, the inlet 351
therefrom extendingas indicated in dotted lines
to the chamber's portion 2|, thus better adapting
the structure to, its use as a motor by avoiding
shutting oil’ the ?uid by the rotor’s rib 29 from
455 entering into the chamber from said inlet.
uniformly spaced from and registering angularly
with corresponding circular portions respectively
of the chamber’s side wall, said rib having gaps
therethrough and being radially narrower than
the chamber, extending therein and rotatably
bearing at one of its curved sides on one of the
circular portions of the chamber’s side wall and
at its other curved side rotatably bearing on the
opposite circularly curved portion of said mem
ber throughout extended arcs of contacts respec
tively, thus forming a pair of angularly spaced
circular arcual ?uid channels in the circuitous
chamber at opposite sides respectively of the rib,
one of the channels having angularly spaced inlet
and outlet' ports; cylindrical pistons axially par
allel with said shaft, ?tting in said gaps and movr
able sidewise therein into said channels alter
nately in closing relation therewith, the casing
having also ?uid passages formed therein and
separated from the bottom of the chamber by 20
said member and communicating through said
member with the other channel for providing a
continuous ?ow of the ?uid through the structure
as governed by the rotor's rotation.
2. In a pump or motor structure of the class 25
described: a rotor having a concentric circular
rib; a casing having a. circuitous chamber of‘ uni
form radial width with av curved side wall com
prising circular arcual portions concentric with
and at different radial distances respectively 30
from the rotor's axis, and arcual portions con
necting said circular portions; a member in the
chamber having a curved peripheral side com
. prising concentric circular arcual portions and
arcual portions connecting the same, all said 35
arcual portions of said member's side being
spaced from and registering angularly with cor
responding arcual portions respectively of the
chamber's side wall, said rib having gaps there
through and being radially narrower than the 40
chamber, extending therein and rotatably hear
ing at one of its curved sides on one of the
circular portions of the chamber’s side wall and
at its other curved side rotatably bearing on the
opposite circularly curved portion of said mem-'
ber, and spaced from both sides of the chamber
said connecting portions of its side wall, thus
packing ring 54 seated in an annular groove in in
forming a pair of angularly spaced ?uid chan
the cover plate.
nels in the circuitous chamber on opposite sides
It will be seen that the operation of this pump respectively of the rib, one of the channels hav
or motor is very continuous, noiseless and steady ing angularly spaced inlet and outlet ports; 50
and that the rotor is well balanced, the ?uid cylindrical pistons axially parallel with the ro—
being continuously admitted and vented from ‘tor’s axis, of a diameter equal to the width 01'
portions of the chamber simultaneously which the chamber and'of the gaps and movable side
are on opposite sidesof the axis of rotation; that wise in the gaps into said channels alternately in
the power is thus very effectively applied; and closing relation therewith; the casing having 55
that the tumable pistons tend to reduce friction. also ?uid passages inwardly from the bottom of
The invention being intended to be pointed out the chamber and communicating with the other
in the claims, is not to be limited to or by details channel forproviding a continuous ?ow of the
of construction or arrangement of any particular ?uid along opposite sides of the rib in said chan
embodiment thereof illustrated by the drawing or nelssrespectively and along both sides of the rib 60
hereinbefore shown or described.
'
in the portions of the chamber which connect
I claim:
'
>
I
said channels, as governed by the rotor’s rota
'I'he structure's discharge pipe is shown at El,
stu?ing boxes at 52, a wear washer at 53 and a
1. In a pump or motor structure of the class
66 described: a rotor having a hub with the rotor
tion.
4
3. In a pump‘ or motor structure of the class
shaft secured thereto and a concentric circular I described: a rotor having a side forming one ?at
rib; a casing having a circuitous chamber with a
- curved side wall comprising circular arcual por
tions concentric with and at different radial dis
tances respectively from the shaft, and arcual,
portions connecting said circular portions; 9.
member detachably secured in the bottom of the
chamber having a bearing wherein the rotor's
hub rotatably bears, and a curved peripheral side
75 comprising concentric circular arcual portions
wall of the hereinafter mentioned chamber and
an inwardly projecting concentric circular rib; a.
casing having a circuitous chamber with a curved
side wall comprising circular arcual portions 70
concentric with and at different radial distances
respectively from the rotor's axis and arcual por
tions connecting said circular portions; a mem
ber in the bottom of the chamber having a curved
peripheral side comprising circular arcual por_- 75
3
2,125,988
tions and arcual portions connecting the last
‘named circular arcual portions, all said arcual
portions of said member's side being spaced from
and registering angularly with corresponding
arcual portions respectively of the chamber’s
side wall, said rib being radially narrower than
the chamber and extending therein and rotat
ably bearing at one ofits curved sides on one of
' the circular portions of the chamber's side wall
10 and at its other curved side rotatably bearing
on the opposite circularly curved portion of said
member throughout extended arcs of contacts
respectively, thus forming a pair of angularly
spaced ?uid channels in the circuitous chamber
15 at opposite sides respectively of the ribyone of
the channels having angularly spaced inlet and
outlet ports; pistons carried by the rotor and
movable into said channels alternately in clos
ing relation therewith, the casing having also
?uid passages inwardly of and separated from
the bottom of the chamber and communicating
with the other channel for providing a continu
ous ?ow of the ?uid along opposite sides of the
rib in said channels respectively as governed by
25
the rotor’s rotation.
.
a
4. In a pump or motor structure of the class
described: a rotor having a concentric circular
rib; a casing having a circuitous chamber of
uniform radial width with a curved side wall
comprising circular arcual portions concentric
with and at di?erent radial distances respectively
from the rotor’s axis, and arcual portions con
necting said circular portions; a member in the
chamber having a curved peripheral side com
prising concentric circular arcual portions and
arcual portions connecting the same, all said
arcual portions oi’ said member’s side being
spaced from and registering angularly with cor
responding arcual portions respectively of the‘
chamber’s side wall, said rib being radially nar
rower than the chamber, extending therein and '
rotatably bearing at one of its curved sides on 15
one of the circular portions of the chamber’s
side wall and at its other curved side rotatively,
bearing on the oppositecircularly curved portion
of said member,_and being spaced from both
sides‘ot the chamber in. the arcual portions of 20
the chamber which connect the circular portions
thereof, thus forming angularly sp'aced ?uid
channels in the circuitous chamber on opposite
sides respectively of the rib; pistons carried by
the rotor movable into the channels alternately 25
in closing relation therewith.
.
CHARLES E. BROMAN.
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