US3155308A - Fluid pump - Google Patents

Description

C. E. TUSSEY FLUID PUMP Filed Sept. 14, 1962 Nov. 3, 1964 CHESTER 3: E555) F- k 4: i

19- L l P I Fin.

36 Humili- United States Patent 3,155,308 FLUl-Il) PUMP Chester E. Tussey, 495 Grandview Ave,

San Francisco, Calif. Filed ept. 14, 1962, Ser. No. 223,754 12 Claims. (Cl. 230-65) This invention relates generally to pumping devices, particularly of the type that includes a power unit and armature operable to eiiect creation of fiuid pressure pulsations. The invention is principally concerned with pumping devices for supplying air to aquariums, it being understood however that it has application to various other purposes requiring pumping displacement of fluids, particularly air or other gases.

The invention concerns itself with solution to problems arising by virtue of the construction of prior pumping devices wherein they tend to chatter and wear out too rapidly, and also require too many parts. chattering is typically the result of overloading of the pump causing the armature to strike against the electromagnet, such overloading often being inadvertently caused by restric tions in the discharge line leading to the aquarium tank. In addition, the diaphragms of prior pumps tend to fail when the armatures attached thereto do not travel or reciprocate linearly, a result which is caused by difficulties encountered in yieldably supporting the armature for reciprocation. Also, loss of power occurs when the con necting link attaching the diaphragm to the armature describes an arc distorting the diaphragm by moving it to one side of center.

The present invention has for its major object to overcome these and other problems associated with prior pumping devices, through the simplification and novel combination and construction of pump unit elements. As broadly considered, the invention incorporates means for creating pressure pulsations including a pump chamber in which the pulsations are created, a power unit, as for example'an electromagnet, for creating a magnetic field which moves in the pump chamber, and an armature movable in the chamber in response to field movement therein for eifecting pulsation creation. Typically, the pressure pulsations are created in the chamber in response to mechanical pulsing thereof, the armature being reciprocable in the chamber and coupled thereto to create the mechanical pulsing of the chamber. Desired simplification is thus achieved in an unusual manner since direct coupling of the armature to the pump chamber eliminates the usual connection or connections required between the armature and a flexible pumping diaphragm. Also, the arrangement is such as to cause the armature to be carried away from the electromagnet in response to back-pressure build-up in the pump chamber, thereby solving the problem of unwanted chatter.

As mentioned, another significant advantage achieved by the, invention concerns the, provision for essentially linear armature reciprocation. To this end a novel arrangement of cantilever springs is provided to support the armature, one spring supporting another so that the free "ice FIG. 2 is an end elevation taken on lines 2-2 of FIG. 1;

FIG. 3 is a plan view showing the spring support for the armature; and

FIG. 4 is a plan view of a modified armature spring support.

In FIGS. 1 and 2 the means for creating pressure pulsations includes a pump chamber generally designated at it in which the pulsations are created. Typically, the pump chamber includes first and second coaxial cupshapedbodies 11 and 12, the former being formed of yieldable material such as rubber or other type elastomer.

' It has a thickenedflange 13 which is held clamped against ends thereof describe arcs which cancel one another so theflange 14 of thesecond body 12, the latter typically being formed of a suitable plastic material. Such clamping action may be secured in the manner illustrated, as by acap 15 fitting downwardly over the body 11 and againsttheflange 13, and a bracket orbail 16 attached to the cap and extending downwardly along the sides of a power unit at 17, the bail extending therebeneath to clampthe underside thereof as better shown in FIG. 2.

Thepower unit 17 typically comprises an electromag- 'et for creating a magnetic field moving generally axially within thechamber 10, and also with respect to theelec tromagnet coil 18. Thecoil 18 is ring-shaped, and extends about an inner pole 19 and within anouter E-shaped pole 29, it being understood that the poles 1 9 and 20 comprise portions of the electromagnet ferrous core which also has a base 21. The core may also be understood as including theferrous plate 22 or washer which is located at the end face of theouter poie 20 and extends radially inwardly in overlapping relation to the end of thecoil 18, this plate element functioning to extend the flux path passing through thepoles 19 and 20. The use of this plate thereby strengthens the field produced in thecharm ber 10 and permits use of heavier wire in thecoil 18, the latter permitting manufacture of the coil forless cost than would otherwise be required in the absence of the plate. As is seen in FIG. 1, theplate 22 has an opening 23 receiving the cup-shaped body 12 to extend proximate the end face of the inner pole 19. This feature is important in view of the requirement that the armature actuated by the electromagnet be located proximate the end face thereof.

Such an armature is generally indicated at 24 in FIG. I and is supported for reciprocation within the chamber 19 in response to movement therein of the electromagnet field produced by the power unit. The armature illustrated has an enlarged head "25 which travels as close to the'inner wall of thebody 12 as indicated by thebroken lines 26, contact with such inner wall being undesirable from the standpoint of unwanted chatter. In

accordance with the invention, armature movement within the chamber eifects the desired pulsation creation therein, and typically the armature is coupled to the chamber to create mechanical pulsing thereof which in turn creates fluid pressure pulsation creation Within the chamber interior. One advantageous and unusual way to couple the armature to thechamber 10 for purposes of creating the desired mechanical pulsations there of is to couple to theflexible wall 27 of the cup-shaped body 11 to cause thelatter to reciprocate with the armature toward'and away from the'cup-shaped body 12'.

. Such coupling may be brought about in the manner illustrated, wherein the body 11 is provided with a tubularportion 28 through which the armature elon-.

gated section 29 extends from within the chamber to the exterior thereof and away from thebody 12.

The projecting extent of thearmature section 29 is suitably fastened as for example by means of therivet 30 to cantilever spring means generally indicated at 31 in FIGS. 1 and 3 which supports the armature for reciprocation. Such spring means is shown as carried by thecap 15, the latter having anextension 32 which is fastened as byrivet 33 to a first cantileverflat spring 34 extending generally transversely oftheaxis 35 of the armature, and at the opposite side of the chamber 11 from thepower unit 17. Thefirst cantilever spring 34 extends leftward beyond theaxis 35 to a location generally indicated at 36; at which the first spring is joined with and carries asecond cantilever spring 37. The latter extends back toward theaxis 35 and between thebifurcations 38 of the first spring, in order to support the armature as by means of therivet 30, the head of which is turned over the second flat spring terminal extent. One advantage of so supporting the armature is to derive a generally linear armature movement in spite of the fact that the cantilever springs, considered individually, describe arcs during such reciprocation of the armature. Thus in FIG. 1 theterminal 36 of thespring 34 will describe an are which is convex to the left, whereas the rivet head terminal of thespring 37 will describe an are which is convex to the right. The springs as. combined, however, will cause the armature to reciprocate linearly. Another form of spring is shown in FIG. 4 as comprising a one-piece length ofwire 39 which has the general shape of thespring combination 31, and functions in a manner similar thereto.

Referring back to FIG. 1, thepump chamber 10 is ported to pass fluid pressure pulsations created in the chamber, one form of such porting being shown at 40. Typically, avalve unit 41 which is shown as outside thechamber 10, is in pressure pulsation communication with the chamber through theporting 40. The valve unit illustrated has air inlet and outlet openings 42 and and flexible covers 44 and 43 cooperating with such openings to control in-flow and out-flow of air to and from the valve unit in response to pressure pulsations transmitted to the covers or gatesn Thus, upon a pressure reduction transmitted through theporting 40, the cover 44 flexes downwardly as aided and defined by thecover support 46 to admit air into thevalve unit 41, and upon transmission of an increased pressure pulse through porting 40, the cover 44 closes the opening 42 and the air drawn into the valve unit is discharged through theopening 45 below thesupport 46. In this regard the cover 43 during such discharge flexes downwardly to a configuration as determined by the top surface of thesupport 47 therefor. Thesupports 46 and 47 are apertured to pass air therethrough. A plenum chamber is shown at 48 within thevalve unit 41 to ac cumulate and dampen pressure pulsations, thereby to provide a steady stream of air discharging at the outlet v49. The latter is shown in communication with afish tank 50 through aline 51 and a suitable valve 52 therein.

Should theline 51 or valve 52 at any time undesirably restrict the flow of air to the tank, a back-pressure build-up may develop within the valve unit and be communicated to thechamber 10. In this event the stroke of the armature toward the power unit will be shortened, so that when the armature next moves away from the electromagnet theflexible wall 27 of the body 11 will deflect upwardly to greater extent thereby to insure against chattering of the armature head 25 against the cup-shaped body 12, and in particular the wall 53 thereof.

I claim:

1. In a pumping device, means for creating fluid pres sure pulsations including a pump chamber in which said pulsations arecreated, a power unit for creating a magr armature at all times remains essentially rigid in said chamber.

2. In a pumping device, means for creating fluid pres sure pulsations including a pump chamber having porting to pass fluid pressure pulsations created in the chamber, an electro-magnetic power unit for creating a magnetic field moving in the chamber, and an armature movable in said chamber in response to said field movement therein for effecting said pulsation creation, the armature being carried to move away from the power unit as fluid enters the pump chamber, the pump chamber having a Wall member characterized as flexible in reciprocation in response to said armature movement during which the armature at all times remains essentially rigid in said chamber.

3. In a pumping device, means for creating fluid pressure pulsations including a pump chamber having porting to pass fluid pressure pulsations created in the chamber, an electromagnetic power unit for creating a magnetic field moving in the chamber, and an armature movable in said chamber in response to said field movement therein for eflecting said pulsation creation, the armature being carried to move away from the power unit as fluid enters the pump chamber, the pump chamber having a Wall member characterized as flexible in reciprocation in response to said armature movement during which the armature at all times remains essentially rigid in said chamber, and a valve unit outside said chamber and in pressure pulsation communication therewith through said porting.

4. In a pumping device, means for creating fluid pressure pulsations including a pump chamber ported to pass fluid pressure pulsations created in the chamber, a power unit for creating a mangetic field moving in the chamber, and an armature movable in said chamber in response to said field movement therein for effecting said pulsation creation, the armature being carried to move away from the. power unit as fluid enters the pump chamber, the pump chamber having a wall member characterized as flexible in reciprocation in response to said armature movement during which the armature at all times remains essentially rigid in said chamber, the chamber being subject to back pressure build-up and the armature being carried to move away from the power unit in response to said build-up.

5. In a pumping device, means for creating fluid pressure pulsations including a pump chamber in which said pulsations are created, a power unit for creating a magnetic field moving in the chamber, and an armature movable in said chamber in response to said field movement for eflecting said pulsation creation, the armature being carried to move away from the power unit as fluid enters the pump chamber, the pump chamber having a wall member characterized as flexible in reciprocation in re 7 sponse to said armature movement during which the armature at all times remains essentially rigid in said chamber, and multiple cantilever springs supporting the armature to reciprocate essentially linearly.

6. In a pumping device, means for creating fluid pressure pulsations, including a pump chamber in which fluid pressure pulsations are created in response to mechanical pulsing of the chamber, the chamber being ported to transmit said fluid pulsations, an electronmagnetic power unit for creating a magnetic field which moves in the chamber, and an armature reciprocable in the chamber in response to said field movement therein and coupled to the chamber to createsaid mechanical pulsing thereof, the armature being carried to move away from the power unit as fluid enters the pump chamber, the pump chamber having a wall member characterized as flexible in reciprocation in response to said armature movement during which the armature at all times remains essentially rigid in said chamber.

7. The invention as defined in claim 6 in which said power unit is at one side of the chamber, and including yieldable means supporting the armature to reciprocate ES u along an axis extending toward and away from said power unit.

8. The invention as defined in claim 7 in which said yieldable means includes first and second cantilever springs extending generally transversely of said axis and at the opposite side of said chamber, the first spring carrying the second spring and the second spring supporting said armature.

9. The invention as defined in claim 6 including a valve unit outside said chamber and in pressure pulsation communication therewith through said porting, the valve unit having air inlet and outlet openings and flexible covers cooperating therewith to control in-flow and out-flow of air in response to pressure pulsations transmitted to said covers. 1

10. The invention as defined in claim 7 in which said chamber includes first and second coaxial cup-shaped bodies and including structure holding said bodies and power unit in stacked relation and supporting said yieldable means at the opposite side of the chamber.

11. The invention as defined in claim 7 including a valve unit in such pressure pulsation communication with the chamber as to regulate in-fiow and out-flow of air to and from the valve unit so that back pressure build-up in the valve unit and communicated to said chamber will deflect said flexible wall to carry the armature relatively away from said power unit.

12. The invention as defined in claim 19 in which said power unit has a core that includes outer and inner poles References Cited in the file of this patent UNITED STATES PATENTS 1,888,322 Lanctot et al. Nov. 22, 1932 2,293,542 Hamilton Aug. 18, 1942 2,659,310 Ryba Nov. 17, 1953 2,767,074 Tussey Apr. 26, 1955 3,066,611 Schwartrnann et al Dec. 4, 1962

Claims (1)

1. IN A PUMPING DEVICE, MEANS FOR CREATING FLUID PRESSURE PULSATIONS INCLUDING A PUMP CHAMBER IN WHICH SAID PULSATIONS ARE CREATED, A POWER UNIT FOR CREATING A MAGNETIC FIELD MOVING IN THE CHAMBER, AND AN ARMATURE MOVABLE IN SAID CHAMBER IN RESPONSE TO FIELD MOVEMENT THEREIN FOR EFFECTING SAID PULSATION CREATION, THE ARMATURE BEING CARRIED TO MOVE AWAY FROM THE POWER UNIT AS FLUID ENTERS THE PUMP CHAMBER, THE PUMP CHAMBER HAVING A WALL MEMBER CHARACTERIZED AS FLEXIBLE IN RECIPROCATION IN RESPONSE TO SAID ARMATURE MOVEMENT DURING WHICH THE ARMATURE AT ALL TIMES REMAINS ESSENTIALLY RIGID IN SAID CHAMBER.

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