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Патент USA US3078043

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Feb. 19, 1963
1. OVRUTSKY
3,078,033
PUMPING MEANS
Filed Aug. 3, 1959
INVENTORS
BY
Irving Ovrufsky.
aw
ATTORNEY
United tates Patent O?lice
3,078,033
Patented Feb. 19,: 1963,
1
2
3,078,033
PUMPENG MEANS
Irving Ovrutslry, 31-12 77th St}, Iackson Heights, NY.
Filed Aug. 3, 1959, Ser. No. 831,275
FIGURES 6' to 9 show the same pertinent. elements of
the pump of FIGURE 1 during different phases, of a
suction cycle.
' Referring to FIGURE 1 a system is shown for changing
the level‘ of liquid in a vessel, 20‘ which‘ is connected via
conduit 22 to sealed‘ reservoir 24'; The liquid is moved
This invention relates to changing the level of ?uid in
through the agency of‘ bidirectional pump 26 and unidi
a vessel and more particularly to pumping means for
rectional or check valves 28‘ andv 30. In particular, the
transferring ?uids between a reservoir and a vessel.
port 32 of‘ bidirectional pump 26‘. is coupled via conduit
Although it is well known to employ pumps to, transfer 10 34 to one side of each, of the check valves 28, and 30
?uids between a reservoir and a vessel, there are certain
whose other sides are connected via conduit 36'to, sealed
liquidswhich because of their highly corrosive nature are
reservoir 24. It should be noted that the check valves
very destructive to the working parts of the pump through
23 and 30 are biased to operate in opposite directions.
which the ?uid must ?ow. Heretofore, special pumps
Those two check valves are conventional, and. are ad
have been made of corrosive resistant parts to handle 15 justed to operate on predetermined pressure differentials
such liquids. However, such pumps are extremely ex
across the valve.
pensive and are therefore not economically feasible in
During operation, when the bidirectional, pump 26 is
many applications. One such important application is
applying suction, a vacuumis created in. sealed reservoir
for transferring the photo-solution of a photo-copy ma
24- by virtue of air being exhausted via conduit 36, check
8 Claims. (Cl. 230-40)
chine from a sealed container into an open tray when the
solution is to be used, and for transferring the solution
back from the open tray or vessel into the sealed con
tainer, when the solution is not in use, in order to pre
serve the solution.
valve 28 and conduit 31% to port 32.
As the vacuum is
created, liquid moves from the vessel 20 via the; conduit
22 to the sealed reservoir 24. On the other hand, Whenv
the bidirectional. pump 26 isv applying pressure, the pres,
sure is transmitted via port, 32, conduit?d, check valve
It is accordingly a general object of the invention to 25 30 and conduit 36 to the liquid in the sealed reservoir 24.
provide. improved apparatus for moving ?uids between
The pressure causes the liquid to ?ow from the sealed res
different vessels.
It is another object of the invention to provide appa-.
ratus for handling corrosive ?uids. ‘
ervoir 24 via the conduit 22 to the vessel Zil. Thus, the
liquid‘ only ?ows. betweenv the vessel, 2i} and the sealed
reservoir 24 and never comes in contact with the bidirec
It is a further object, to. provide apparatus including a 30 tional pump 26.
The bidirectional pump 26' includes. a frame 38‘ sup;v
porting a motor 40, an eccentric drive means 412, and a
pump.
'
pump for moving a. ?uid between a reservoir and a sealed
vessel in which the fluidv never comes in contact with the
cylinder 44. The windings of motor 40 areconnectedto a
Brie?y, in accordance with an embodiment of the inven-.
voltage source 46. The shaft 48 of motor 40. is coupled,
35
tion apparatus is provided for changing the, level of ?uid
via belt 50 to pulley 52 which is fixed on shaft 54 of ec-.
in a. vessel. The apparatus includes a. sealed reservoir
and a conduit connecting the vessel to the sealed. reservoir.
A pump which can create either pressure or suction is
connected via a second conduit to the sealed reservoir.
A feature of the invention is a pump which comprises
a. cylinder having an open and a closed end. with a port
disposed in the cylinder remote from the open end. and
means disposed near the open end for reciprocatingly
centric drive means 42. A wheel 5:6 on shaft 54 hasv a.
pivotalv coupling 58 with a rod 630 extending through the
open end 61 of cylinder 44 to rigidly connect with piston
62, which is slidably movable. The pivotal coupling 58,
on eccentric drive means 42' traces out a circle in a plane,
that is, parallel to the major axis 73 of'cylinder 44. By vir
tue of this’ circular path, rod 60 coupled to, pivotable
coupling 58 imparts reciprocating motion of the piston, 62,
driving a piston in the cylinder. The piston ‘when. moving
Extending from frame 38 is a pivotal connection 66. to
in a first direction is substantially perpendicular to the 45 the outer wall of cylinder 44 near the closed end 6,4, An
major axis of the cylinder and when moving in thev op.
arm 68 extending from pivotal connection 616. contacts
posite direction isoblique to the axis.
’
spring loaded ball bearing 70 supported by frame 318.
In further embodiments of this feature it is possible to‘
Pivotal connection 66 permits cylinder 4,4 to‘ rotate in an
change the orientation of the cylinder with respect to the
arc having a center of rotation alongv a line that includes
50
piston so that the piston is oblique to the major axis when
a diameter of the cylinder 44, The extremesof the ar
moving in the ?rst direction and. perpendicular in the
cuate movement are restricted by the geometry of the
opposite direction.
'
piston 62, the rod 60, the diameter of the cylinder 44 and
It should be noted that if the piston is perpendicular to
the location of the pivotal coupling 58 on, the wheel 56.
the cylinder’s major axis on the instroke then; the pump
The are is preferably bisected by the line 72 drawn be;
55
can be used to apply pressure, while if it is perpendicular
tween the shaft 54' (the axis of rotation of eccentric drive
on the outstroke it can be used to apply suction. When
means 42) and the pivotal connection 66 (the, axis of
the piston is perpendicular to the major axis of the cyl~
inder there is a seal between the open end of the cylinder
and the chamber de?ned by the-piston and the closed end
of the cylinder, whereas whenthepiston is oblique to the
cylinder’s major axis this seal is broken.
Other objects, features and advantages of the invention;
will be apparent from the following detailed description
when read with the accompanying drawings wherein:
65
FIGURE 1 shows a system, partially in schematic form,
for moving a ?uid between a vessel and a reservoir
rotation of cylinder 44). Arm 68 and spring loaded ball
bearing 70 are oriented so that when arm, 68 lies on one
side of ball bearing 70 the major axis 73 of cylinder 44 is
on one side of line '72 as in FIGURES 2 to 5:; and when
arm 68 is on the other side of ball bearing 70v the major
axis 73 is on the other side of, line 72 as in FIGURES 6'
to 9_. The coaction of arm 68 and ball bearing 70 lock
cylinder 44 in either one of these two positions.
The signi?cance of the orientation of the major axis 73"
of the cylinder 44 with respect to the line 72 will" now be
described. In general, when major axis 73 is below’ the
through the agency of a pump shown in elevation, in ac-.
line 72- as in FIGURES l to 5 and eccentric drive means
cordance with an embodiment of the invention;
42 is rotating in a counter clockwise direction, bidirec
FIGURES 2 to 5v shows the pertinent elements of the 70 tional
pump 26 acts as a pressure pump. As is shown in
pump of FIGURE 1 during di?erent phases of a pressure
FIGURES 2 and 3, during the instroke, piston 62 is sub;
cycle; and
stantially perpendicular to the major axis 73‘ of cylinder
3
44 and a seal is maintained between the region 74 and the
open end 61. Therefore, pressure is transmitted via port
stroke of reciprocating motion and oblique to said major
axis during said forward stroke of reciprocating mo
32.. However, during the outstroke (FIGURES 4 and 5)
the piston 62 is oblique to the major axis 73 of the cylin
tion.
der 44 and the seal between the region 74 and the open
end 61 is broken. Therefore, no suction action is present.
2. Pumping apparatus as in claim 1, comprising, ad
ditionally,
On the other hand, when the major axis 73 of the cyl
inder 44 lies above the line 72 and the eccentric drive
means 42 is rotating counterclockwise, bidirectional
pump 26 creates a suction. During the instroke, as is 10
shown in FIGURES 6 and 7, piston 62 is oblique to the
major axis 73 of the cylinder 44 and there is no seal be
tween the region 74 and the open end 61. However, dur
ing the outstroke (FIGURES 8 and 9), the piston 62 is
substantially perpendicular to the major axis 73 and an air 15
tight seal is maintained between the region 74 and the open
end 61. Accordingly, a suction is created which is trans
mitted via port 32. Therefore, it is only necessary to ro
means including a ?rst and a second unidirectional
check valve means both coupled to said port in said
cylinder and disposed to be respectively operative
under mutually opposite pressure conditions from
said port, and means coupling both said check valve
means to a common outlet conduit, whereby opera
tion of the piston in one direction will establish
pressure in the common outlet conduit through the
correspondingly directed check valve, and operation
of the piston in a second direction will establish
vacuum condition in the common outlet conduit
through the other check valve.
3. A pump comprising a cylinder having an open and
a closed end, a port disposed in said cylinder remote from
tate the eccentric drive means 42 in one direction and to
position the major axis 73 on different sides of the line 72 20 said open end, a piston sl-idably moveable in said cylinder,
means disposed near said closed end for permitting said
to obtain either pressure or suction.
cylinder to be rotated in an are about a ?rst axis of
In this embodiment of the invention it is not necessary
rotation which is perpendicular to the major axis of
to have a bidirectional motor or reversible voltage source.
said cylinder, an eccentric drive means disposed near
However, when a bidirectional motor is available with
a reversible voltage source it is only necessary to orient 25 the open end of said cylinder for reciprocatingly moving
said piston in said cylinder, said eccentric drive means
the major axis 73 of cylinder 44 on one side of the line 72
tracing out a circle in a plane parallel to the axis of said
and reverse the direction of rotation of eccentric drive
cylinder, means for controllably positioning said cylinder
means 412. For example, when the eccentric drive means
at either extreme of said ‘arc so that when said cylinder
42 is rotating counterclockwise and the major axis 73 is
below the line 72 as is shown in FIGURES 2 to 5, bi 30 is at one of said extremes, the major axis of said cylinder
lies on one side of a line joining the said ?rst axis and
directional pump 26 exerts pressure. However, when the
the axis of rotation of said eccentric drive means and
direction of rotation of the eccentric drive means 42 is
when said cylinder is ‘at the other of said extremes, the
reversed and the orientation of major axis 73 remains un
major axis of said cylinder lies on the other side of said
35 line, and means for coupling said eccentric drive means
during the outstroke and a suction is created.
to said piston whereby when said cylinder is positioned
In essence, it should be noted that because of the ec~
at one extreme of said arc, the transverse axis of said
centric action which imparts reciprocating motion to the
changed, piston 62 is perpendicular to the major axis 73
piston 62, the piston 52 is substantially perpendicular to
the major axis 73 during one portion of the cycle of ro
piston is substantially perpendicular to said major axis
during another portion of the cycle. Therefore, depend
portion of said cycle, and when said cylinder is positioned
of said cylinder during a ?rst portion of a cycle of rotation
tation of the eccentric drive means 42 and is oblique 40 of said eccentric drive means and oblique during a second
ing on whether the piston is perpendicular during the in
stroke or outstroke determines whether the bidirectional
pump 26 is creating pressure or suction.
It should be noted that the cylinder 44 is preferably a
circular cylinder.
However, cylinders of non-circular
‘at the other extreme of said are, the transverse axis of
said piston is substantially perpendicular to said major
axis of said cylinder during said second portion of a.
cycle of rotation [of said eccentric drive means and ob
lique during said ?rst portion of said cycle.
4. The apparatus of claim 3 wherein said ?rst axis is
cross-section may be used provided there is symmetry
a diameter of said cylinder.
about the diameter chosen for rotating the cylinders.
5. The apparatus of claim 3 including means for look
There has thus been shown improved apparatus for
moving ?uids between two different vessels through the 50 ing said cylinder at either one of said extremes.
6. Pumping apparatus as in claim 3, comprising, ad
agency of an improved bidirectional pump wherein the
?uid never comes in contact with the pump. The bidirec
tional pump, a feature of the invention, by virtue of its
diiferent orientations of its piston with respect to the
major axis of its cylinder, is readily convertible between
a pressure pump and a suction pump.
It will now be obvious to those skilled in the art, many
modi?cations and variations which accomplish all or part
of the foregoing objects, but which do not depart essen
tially from the invention as de?ned in the claims which 60
follow.
What is claimed is:
1. A pump comprising a cylinder having a closed and
an open end, a port disposed in said cylinder remote from
said open end, a piston, means for reciprocatingly mov 65
ing said piston in said cylinder, the reciprocating move
ment of said piston being ‘a periodic occurring combina
tion of 1a forward stroke and a retracted stroke, means
for causing the transverse axis of said piston to be substan
tially perpendicular to the major axis of said cylinder
during the forward stroke of reciprocating motion and
oblique to said major axis during the retracted stroke of
reciprocating motion, and means for controllably caus
ing the transverse axis of said piston to be substantially
ditionally,
means including a ?rst and a second unidirectional
check valve means both coupled to said port in said
cylinder and disposed to be respectively operative
under mutually opposite pressure conditions from
said port, and means coupling both said check valve
means to a common outlet conduit, whereby opera
ation of the piston in one direction will establish
pressure in the common outlet conduit through the
correspondingly directed check valve, and operation
of the piston in a second direction will establish
vacuum condition in the common outlet conduit
through the other check valve.
7. A pump comprising a cylinder having an open and a
closed end, a port disposed in said cylinder remote from
said open end, a piston slidably moveable in said cylin
der, an eccentric drive means disposed near said open
end for reciprocatingly moving said piston in said cylin
der, the reciprocating movement of said piston being
a periodic occurring combination of a forward stroke and
a retracted stroke, said eccentric drive means tracing out
a circle only in one direction in a plane parallel to the
axis of said cylinder and having a center of rotation later
perpendicular to said major axis during said retracted 75 ally displaced from the major axis of said cylinder, means
8,078,033
5
coupling said piston to said eccentric drive means for
causing the transverse axis of said piston to be substan
wI :-m
tially perpendicular to said major axis during the for
ward stroke of reciprocating motion and oblique to said
major axis during the retracted stroke of reciprocating
motion, and means for controllably angularly tilting the
major axis of said cylinder for causing the transverse axis
of said piston to be substantially perpendicular to said
major axis during the retracted stroke of reciprocating mo
tion and oblique to said major axis during the forward 10
stroke of reciprocating motion.
8. Pumping apparatus, as in claim 7, comprising ad
d-itionally,
means including a ?rst and a second unidirectional
check valve means both coupled to said port in said 15
cylinder and disposed to be respectively operative
under mutually opposite pressure conditions from
said port, and means coupling both said check valve
3
means to a common outlet conduit, whereby opera
tion of the piston in one direction will establish
pressure in the common outlet conduit through the
correspondingly directed check valve, and operation
of the piston in a second direction will establish
vacuum condition in the common outlet conduit
through the other check valve.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,755,318
2,011,831
2,023,466
2,284,645
2,710,137
2,762,390
2,884,001
Dinesen ______________ __ Apr. 22,
Sinanide _____________ __ Aug. 2-0,
Crowley _____________ __ Dec. 10,
Duffy ________________ _. June 2,
Arnouil _____________ __ June 7,
Rodenacker ________ __ Sept. 11,
Herrero ____________ __ Apr. 28,
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