US2193504A - Pump - Google Patents

Description

Maud-112, 194a. ANTR A 2,193,504

PUMP

Filed May 21, 193? I 5 Sheets-Sheet 1 A TTORNEYS.

March 12, 1940. c. H. ANTRIM El AL.

PUMP

Filed May 21, 1955'? 5 Sheets-Sheet 2 INVENTORS. Elli-Z!- i m Mines s March c. H. ANTRlM El AL 2,193,504

PUMP

Filed May 21, 1937 5 Sheets-Sheet 5 NVEN S.

A TTORNEYS.

March 12, 1940.

, C. H. ANTRIM El AL PUMP Filed May 21, 1937 5 Sheets-Sheet 4 IN VEN TORS. .Hntrim Zicsda Zc ATTORNEYS.

WITNESSES: k n ffg March 12, 1940.- TRM AL 2,193,504

PUMP Filed May 21, 1957 s Sheets-Sheet 5 INVENTORS. Charles E flzzirizn Cl 1161111 sd 1 mi'tzess: v BY 6 a e A TTORNEYS.

Patented Mar. 12, 1940 UNITED STATES PUMP Charles H. Antrim and Clyde H. Teesdale, Grand Rapids, Mich., assignors to Teesdale Manufacturing Company, Grand Rapids, Mich., a corporation of Michigan Application May 21, 1937, Serial No. 143,906

9 Claims.

The present invention relates to pumps and more particularly to gear pumps.

The primary objects of the instant invention are toprovide a pump of the type above indicated which is particularly well adapted for feeding oil from a storage tank to the nozzle of an oil burner of an oil burning furnace; to provide such a pump which is suitable for use in conjunction with a storage tank having either a single gravity supply conduit to the furnace or a non-gravity supply conduit to the furnace and a discharge return conduit for returning oil pumped in excess of that required by the burner; to provide such a pump having a diaphragm element associated with the suction conduit for eliminating pulsation hum; to provide such a pump whose gear teeth are disposed within laterally disposed marginally overlapping bores of a plate disposed interjacent spaced head plates; to provide such a pump whose pumping mechanism isimmersed in the pumped fluid and is thus self-lubricating; to provide such a pump having an improved regulating valve by means of which the amount of oil supplied to the furnace is uniform but whose quantity may be adjusted to varying requirement; and, to provide such a pump which is economical in manufacture, highly eflicent in use, and convenient with respect to replacement of worn or defective parts.

An illustrative embodiment of the invention is shown in the accompanying drawings, wherein:

Figure 1 is a front elevational view of a hot air furnace equipped with a motor drivenfuel oil burner whose pump draws oil from a fuel oil supply tank through a non-gravity supply conduit and returns oil in excess of burner requirements to the tank through a discharge return conduit;

Figure 2 is an enlarged sectional view of the pump unit per se;

Figure 3 is a sectional view on line 3-3 of Figure 2;

Figure 4 is a sectional view on line 4-4 of Figure 3;

Figure 5 is a sectional view on line 8-5 of Figure 3;

Figure 6 is a sectional view on line 8-8 02 Figure 3;

Figure 7 is a sectional view online 1-1 of Figure 2;

Figure 8 is a sectional view on line 8-8 of Figure '7;

Figure 9 is a sectional view on line 9-9 of Figure 8;

Figure 10 is a diagrammatic view similar to Figure 1 but showing a portion of the pump shown;

in Figure 2 when the same has been modified for use in conjunction with a single gravity feed conduit connected with fuel oil supply tank;

Figure 11 is a plan view on line I ll I of Figure 2 and showing the diaphragm covered well which eliminates the otherwise audibility of pulsation pump beats;

Figure 12 is a perspective view of some of the several parts of the pump prior to their assembly;

Figure 13 is a fragmentary sectional view of the valve mechanism in one of its operating positions; and

Figure 14 is a fragmentary sectional view of the valve mechanism in another of its operating positions. I

Referring then to the drawings wherein like parts of the pump (and the environment in which it is here shown in association) are designated by the same numerals in the several views, a furnace I0, here shown as of the hot air type, has a conventional fuel oil burner ll mounted on the floor 1 l2 and having its nozzle, not shown, projecting through the ash pit door I3 of the furnace. An electric motor l4, diagrammatically shown in Figure l, for operating the burner atomizer and the pump I5, through the flexibly and detachably coupled shafts l6, I6 is disposed between the burner II and the pump 15.

Fuel oil supplied to the storage tank H (in Figure 1, buried outside the building 18 in the ground l9, through the supply conduit 20), is caused to be pumped by the pump l5 from the tank I'I through the intake conduit 2| past the ball check valve 22 and into the core conduit 23 of the cylindrical pump housing 24, through the core conduit 25 of the end plate 26 and its inside screen 21 into the liquid vacuum intake chamber 28 within the pump housing 24, all as best shown by arrows in Figures 1 and 2. The end plate 28 secured to one end of the cylindrical pump housing 24 as by machine screws 28 thus seals one end thereof and its opposite end is sealed by the end plate 30 of the motor l4 as by machine screws 3|.

The end plate 30 is provided with a shaft bearing 32 for the shaft l8 and an internal annular flanged web 33 here shown as integrally formed with the cylindrical pump housing 24, dividing the pump housing into the liquid intake chamber 28 and an excess low pressure liquid chamber 34 is likewise provided with a shaft bearing 35 for the shaft l6 permitting detachment of the flexibly coupled shafts l6, l6 when it is desired to replace the pump unit by removal of the end plate 26. v

The pump 15 here shown as of the gear type,

whose several parts in their unassembled relation are best shown in Figure 12, comprises a pair of spaced head plates 36, 31. A medial plate 38 disposed interjacent these head plates is provided with a pair of laterally spaced marginally .overlapping gear retaining bores 39, 40 within which are seated the driving gear 4| keyed to the shaft I6 and the driven gear 42 keyed to a driven shaft 43. The opposite faces of the driving and driven gears are here shown as flush with the opposite inside surfaces of each head plate: 36, 31 which head plates and the medial plate 38 are secured together in assembled relation as by the machine screw 44.

The head plate 36 is provided with an external annular flange 45 and with a liquid intake port 46, best shown in Figures 8 and 12, afiording communication between the liquid intake chamber 28 and the gears 9|, 42. The head plate 31 is provided with a liquid discharge port41 in communication with the annular channel 48 communicating with the core conduit 49 leading to the cylindrical valve housing 50 disposed within the excess liquid chamber 34.

The web 33 is provided with a laterally disposed annular flange 5| forming a well 52 and the pump I5 in its assembled relation is seated and secured therein by machine screws 53 passing through the external annular flange 45 of the head plate 36 and into the flanged wall 5|] forming the well 52.

Referring now to Figures 3, 4, 5, 6, 13 and 14, the cylindrical valve housing 50 is there shown as an integral portion of the pump housing 24 and a quill 54, whose lower end is sealed by a cap 55 in any suitable manner as by machine screws 56, is disposed within the valve housing 50 within which it is detachably secured by a cap 51, provided with a screw threaded plug 58, as by machine screws 59 pasing through the flange 60 and into the wall of the housing.

The lower end of this quill is provided with an external annular flute 6| in registration with the core conduit 49 and a transverse bore 62 in registration with the flute 6| provides communication with the interior of the quill. A pair of spaced external annular flutes 63, 64 disposed above the flute 61 respectively register with a pair of spaced internal annular grooves 65, 66 and transverse bores 61, 68 respectively provide communication between the external flute 63 and internal groove 65 and between the external flute 64 and the internal groove 66.

The external flute 63 registers with the elbow core conduit 69 communicating with a flexible discharge conduit 10 leading fZTthe burner II and the external flute 64 registers with the core conduit 1I whose oriflce 12 communicates with the interior of the excess liquid chamber 34.

A piston 13 disposed within the quill 54 has an annular external groove 14 forming a pair of spaced heads 15, 16 and a reduced lower end 11. A longitudinal bore 18 in this piston communicates with a transverse bore 19 thereof communicating with the annular external groove--14. The upper end of the quill 54 is internally screw threaded to receive the screw threaded cap 8| and a coiled expansion spring 82 disposed between the upper end of the piston 13 and the cap 8I normally maintains the piston in its position shown in Figure '3.

In instances wherein the oil is drawn from the supply tank I1 through a non-gravity supply conduit 2| and oil in excess of burner requirements is returned to the tank I1 through a disaieaece charge return conduit 80 as shown in Figure 1, a threaded plug 83 is inserted into the threaded bore between the core conduit 23 and the parallel core conduit 84 communicating with the excess liquid chamber 34, all as best shown in Figure 2. In instances wherein the oil is fed from the tank I1 to the intake chamber 28 of the pump through the single gravity feed line 65 as shown in Figure 10, the plug 83 is removed and a screw threaded plug 86 is inserted into the threaded bore in which instance excess oil is returned from the excess liquid chamber 34 to the intake chamber 28 through the core conduits 84, 23 as indicated by arrows.

Otherwise audible pulsation pump beats may be eliminated by trapping a pocket of air in a well covered by a diaphragm operable by the pump beats in the intake port or conduit to the pump and as shown in Figures 2 and 11, the well 81 in the end plate 26 is covered by a diaphragm 88 secured over its open end by a ring 89 clamping the diaphragm to the annular flanged wall 90 forming the well 81.

Leakage of oil from the excess low presure liquid chamber 34 between the shaft I6 and its bearing 32 in the end plate 30 is prevented by a sealing element comprising a disc member having an apertured metal hub portion I embracing the inner end of the shaft I6 and its flexible portion I 0I extending radially therefrom. The oposite marginal borders of the flexible portion IOI of the disc are provided with gaskets I02, I03 and an apertured cupped cap I04, embracing the shaft I6 inwardly of the disc memberbetween which members is provided a coiled expansion spring I05, engages the gasket I03 for securing the marginal edge of the flexible portion IOI of the disc to the end plate 30 as by screws I06.

Operation In operation, fuel oil within the supply tank I1 is drawn therefrom through the intake conduit 2I (Figure 1) or the intake conduit 85 (Figure 10) in the direction indicated by arrows, through the ball check valve 22, thence through the core conduits 23, 25, past the screen 21 and into the vacuum liquid intake chamber 28 which provides an auxiliary oil supply and within which the pump I is immersed.

Oil within the chamebr 28 is drawn through the intake or suction port 46 of the head plate 36 of the pump and discharged therefrom through the discharge port 41 of the plate 31, said suction being effected by rotation of the driving gear 4| and its driven gear 42 in the direction indicated by the arrows in Figure 8.

These gears are seated in the laterally spaced marginally overlapping gear retaining bores 39, 40 of the medial plate 38 and since the opposite faces of each gear are flush with the opposite inner surfaces of the head plates 36, 31, oil leakage occurs between the rotating gear teeth and between the opposite surfaces of this medial plate and adjacent inner surfaces of each head plate to lubricate the shaft bearings of the driving shaft I6 and driven shaft 43.

Oil thus discharged through the discharge port 41 passes into the annular groove 48 from where it flows into the core conduit 49, thence into the annular groove 6I of the quill 54 and through the bore 62 thereof into its interior.

Pressure of the pumped oil lifts the piston. 13 against the action of the expansion spring 82 from the position of the piston shown in Figure to its position shown in Figure 13 permitting flow of the oil upwardly between the inner wall of the quill and the outer wall of the lower end of the piston, into the annular flute 65 from where it flows through the transverse bore 61 into the elbow core conduit 69 and thence outwardly through the discharge conduit 10 to the nozzle of the burner l l.

Oil pumped in excess of the quantity required by the burner causes the piston to move upwardly against the action of the expansion spring 82 from its position shown in Figure 13 to its position shown in Figure 14 permitting flow of the oil through both the bore 61 into the discharge conduit 10 and also upwardly through the hollow piston 13, outwardly through its port 19 and into the bore 68, thence into the conduit II from whose orifice 72 the oil flows into the excess low pressure liquid chamber 34.

In instances wherein the oil is drawn fromthe supply tank I! through the non-gravity supply conduit 2| and oil in excess of burner requirements is returned to the tank I! through the discharge return conduit 80 as shown in Figure 1, a threaded plug 83 is inserted into the threaded bore between the core conduit 23 and the parallel core conduit 84 communicating with the excess low pressure liquid chamber 34, all as,best shown in Figure 2.

In instances wherein the oil is fed from the tank I! to the intake chamber 28 of the pump through the single gravity feed line 85 as shown in Figure 10, the plug 83 is removed and a screw threaded plug 86 in inserted into the threaded bore in which instance excess oil is returned from the excess liquid chamber 34 to the intake chamber 28 through the core conduits 84, 23 as indicated by arrows.

here shown as eliminated byprovision of the well 81 in the end plate 26 whose open end is covered by the diaphragm 88 secured by the ring. 89

conduit to the furnace and a discharge return line is provided for returning oil pumped in excess of that required by the burner.

The pump is constantly immersed within the L liquid providing self-lubrication and otherwise audible "pulsation hum is eliminated by novel means. The unit herein shown and described is economical in manufacture, highly eflicient in use and is obviously convenient with respect to replacement of worn or defective parts and since the chamber 28 is a vacuum chamber and since the chamber 34 is a low pressure chamber sealing of unit is not difficult in production.

While but one specific embodiment of the invention has been herein shown and described, it will be understood that certain details of the construction shown may be altered or omitted without departing from the spirit of this invention as the same is defined by the following claims.

We claim:

1. A unit comprising a sealedhousing having its interior divided into a liquid intake chamber provided with a liquid intake port and an excess liquid chamber provided with a liquid discharge port, a valved housing within the excess liquid chamber having a discharge port for delivering a predetermined quantity of liquid and a by-pass port communicating with the excess liquid chamber for delivering liquid pumped in excess of said predetermined quantity, and a pump within the liquid intake chamber provided with 'a liquid intake port and having a liquid discharge port communicating with the valved housing.

2. A unit comprising a sealed housing having a division wall dividing it into a liquid intake chamber provided with a liquid intake port and a noncommunicating excess liquid chamber provided with a liquid discharge port, a valved housing within the excess liquid chamber having a discharge port for delivering a predetermined quantity of liquid and a by-pass port communicating with the excess liquid chamber for delivering liquid pumped in excess of said predetermined quantity, and a pump within the liquid intake chamber provided with a liquid intake port and having a liquid discharge port communicating with the valved housing. 7

3. A unit comprising a sealed housing having a partition wall dividing it into a liquid intake chamber provided with a liquid intake port and an excess liquid chamber provided with a liquid discharge port, a valved housing within the excess liquid chamber'having a discharge port for delivering a predetermined quantity of liquid and a by-pass port communicating with the excess liquid chamber for delivering liquid pumpedin excess of said predetermined quantity, and a pump mounted as a unit within the liquid intake chamber on said partition wall comprising a pair of spaced head plates, a medial plate disposed interjacent the head plates provided with a pair of laterally spaced marginally overlapping gear retaining bores, a driving gear disposed within one bore and'a driven'gear in mesh with the driving Hgear disposed within the otherboreglone of said clamping it to the annular flanged wall 98 which head plates having a liquid intake port and the other head plate being provided with a liquid discharge port communicating with the valved housing. e f

4. A structure comprising a housing divided by a partition wall into a liquid intake chamber and an excess liquid chamber and having a fluid intake port, a fluid discharge port, and an excess fluid discharge port; a quill disposed within the excess liquid chamber and having a fluid intake port extending throu h the wall of the quill and in registration with he intake port of the housing, a pump located within the liquid intake chamber for causing a flow of fluid under pressure to said quill, a fluid discharge port extending through the wall of the quill and in registration with the discharge port of the housing, and an excess fluid discharge port extending through the wall of the quill and in registration with the excess discharge port of the'housing; and a piston slidably mounted within the quill normally sealing the discharge port and excess discharge port but movable under pressure of pumped fluid charge port, a valve housing within the excess fluid chamber having a fluid intake port, a fluid discharge port, and an excess fluid discharge port communicating with the excess fluid chamber; a quill disposed within the valve housing having a fluid intake port extending through the wall of the quill and in registration with the intake port of the valve housing, a fluid discharge port extending through the wall of the quill and in registration with the discharge port of the valve housing, and an excess fluid discharge port extending through the 'wall of the quill and in registration with the excess discharge port of the valve housing; a pump Within the fluid intake chamber provided with a fluid intake port and having a fluid discharge port communicating with the intake port of the valve housing; and a'piston slidably disposed within the quill normally sealing the discharge port and excess dismeans for dividing it into a vacuum liquid inmar port but movable under pressure of pumped fluid through the intake port of the quill to provide a predetermined flow of fluid through the discharge port of the quill and to thereafter cause the flow of fluid through the excess discharge port of the quill pumped in excess of said predetermined flow.

6.A unit comprising a sealed housing having take chamber provided with a liquid intake port and an excess low pressure liquid chamber provided with a liquid discharge port, a valved housing within the excess liquid chamber having a discharge port for delivering a predetermined quantity of liquid and a by-pass port communicating with the excess liquid chamber for delivering liquid pumped in excess of said predetermined quantity, and a pump within the liquid intake chamber supported by said dividing means and provided with a liquid intake port communicating with said intake chamber and having a liquid discharge port communicating with the valved housing.

7. A unit comprising a sealed housing having a partition dividing the housing into a vacuum fluid intake chamber provided with a fluid intake port and an excess low pressure fluid chamber provided with a fluid discharge port, a valve housing within the excess fluid chamber having a fluid intake port communicating with said fluid intake chamber, a fluid discharge port, and an excess fluid discharge port communicating with the excess fluid chamber; a quill disposed within the valve housing having a fluid intake port extending through the wall of the quill and in registration with the intake port of the valve housing, a fluid discharge port extending through the wall of the quill and in registration with the discharge port of the valve housing, and an excess fluid discharge port extending through the wall of the quill and in registration with the excess areasos discharge port of the valve housing; a pump mounted within the fluid intake chamber upon said partition and provided with a fluid intake port and having a fluid discharge port communicating with the intake port of the valve housing; and a piston slidably disposed within the quill normally sealing the discharge port through the wall of the quill and excess discharge port through the wall of the quill but movable under pressure of pumped fluid through the intake port of the quill to provide a predetermined flow of fluid through the discharge port of the quill and to thereafter cause the flow of fluid through the excess discharge port of the quill pumped in excess of said predetermined flow.

8. A unit comprising a sealed housing having a partition dividing it into a liquid intake chamber and an excess liquid chamber and having an annular flange forming a well in the liquid intake chamber, said housing being provided with a liquid intake port and a liquid discharge port, a valved housing located within the excess liquid chamber and formed integral-with one of the walls of the sealed housing and having a by-pass communicating with the excess liquid chamber, and a pump mounted as a unit within said well and removable therefrom as a unit and having means for detachably securing it to said annular flange.

9. A unit comprising a sealed housing having a partition dividing it into a liquid intake chamher and an excess liquid chamber and having an annular flange forming a well in the liquid intake chamber, said housing being provided with a liquid intake port and a liquid discharge port, a valved housing located within the excess liquid chamber and formed integral with one of the walls of the sealed housing and having a by-pass communicating with the excess liquid chamber, and a pump mounted as a unit within said well and removable therefrom as a unit and comprising inner and outer head plates, a medial plate disposed interlacent the head plates and provided with a pair of laterally spaced marginally overlapping gear retaining bores, a driving gear disposed within one bore, a driven gear disposed within the other bore in mesh with the driving gear, said gears having their faces substantially flush with the faces of the medial plate, one of said head plates having a liquid intake port and the other head plate being provided with a liquid discharge port, fastening means for securing said plates together for enabling the pump to be placed in and removed from said well as a unit, and separate fastening means for securing the outer head plate to the annular flange.

CLYDE H. 'I'EESDALE. CHARLES H. AN'TRIM.

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