US2190908A - Liquid dispensing apparatus - Google Patents

Description

Feb. 20, 1940. J. RETSEMA 2,190,908

LIQUID DISPENS ING APPARATUS Filed March 18, 1959 4 Sheets-Sheet 1 FIG I.

Jay )PETJE/WZ Feb. 20, 1940. J S M 2,190,908 LIQUID DISPENSING APPARATUS Filed March 18, 1939 4 Sheets-Sheet 3 Feb. 20, 1940. RETSEMA' 2,190,908

LIQUID DISPENSING APPARATUS Filed March 18, 1939 4 Sheets-Sheet 4 Patented Feb. 20, 1940 PATENT OFFICE LIQUID DISPENSING APPARATUS Jay Retscma, Muskegon Heights, Mich., assignor to John Wood Manufacturing Company, Inc., Conshohocken, Pa., a corporation of Delaware Application March 18,

Claims.

My invention is particularly applicable to metering pumps for dispensation of viscous liquids I such as lubricating greases, adapted to be interchangeably connected with portable containers of different forms. The liquid is elevated from such a detachable container by a reciprocatory piston provided with a rack in mesh with a sectoral gear; which gear is operatively connected with a lever, the oscillatory movement of which is limited to not more than one hundred eighty de-.

. having their axes parallel and each including projections which mesh with the other. One of said rotary elements is operatively connected with a' rotary index pointer which traverses a circular scale, having graduations indicating volumetric units.

As ordinarilyconstructed, apparatus for the purpose of dispensing such lubricants includes one or more stufiing boxes containing packingmeans which must be frequently adjusted to prevent the escape of the lubricant. One advantageous feature of my invention is that it does not require any such packing means. Another advantageous feature of my invention is that the pump actuating gear, its shaft, said rotary elements of the displacement meter, the indicating means, the gearing connecting them, and a spring pressed valve which retains the liquid under pressure until any air or gases occluded therein areeliminated, are all contained in a single metal casing, so designed that it may be readily formed of a single die-casting.

I My invention includes the various novel features of construction, arrangement, and method of operation hereinafter more definitely specified.

In said drawings;

Fig. I is a plan view of liquid dispensing apparatus conveniently embodying my invention, on the removable lid of a portable liquid container.

.Fig. II is an elevation of said apparatus, asseen from the lower side of Fig. I; detachably con- ..nected with a lubricant container mounted upon a wheel truck.

Fig. III is a fragmentary vertical sectional view taken .on the line III, III in Fig. I, in the direction of the arrows on that line, but on a larger scale.

Fig. IV is an inverted plan view of the mechanism casing shown in Fig. III.

Fig. V is an oblique plan view of theupper por- 1939, Serial No. 262,597

tion of said casing shown in Fig. III, as seen in the direction of the arrow on that figure.

Fig. VI is a fragmentary inverted plan view of the casing shown in FigV, with the base cover of the meter chamber removed to show the j pair of inter-meshing rotary displacement members, by which the metering indicating mechanism is actuated. a I

Fig. VII is an irregular plan sectional View of said casing taken on the line VII, VII in Fig. III, 10 showing the bearing for the fulcrum shaft of the pump operating lever. v l

I. Fig. VIII is an oblique sectional view takenon' the line VIII, VIII in Fig. III, in the direction of the arrows on said line, showing the gearing 1E train connecting one displacement member with the indicator, a drain port from the register chamber, and the restricted passageway through which air and other gases may be eliminated from the liquid and discharged from said casing into the container subjacent thereto.-

The container I, shown in Fig. II, isan open-- topped cylindrical sheet metal vessel with" annular corrugations 2 pressed therein tostiffen it. Said container l is conveniently rendered readili '25 portable by supporting it upon the flange 3 of. the truck frame 4 which is supported by a pair of wheels 5 having the axle 6 in said frame. Said container. I is temporarily closed at its upper end by the removable cover I which has the downward turned rim .8 overhanging the top edge .I' of said container, so that said cover may not be displaced laterally with respect to said container. Said cover has the keeper plate It convenienetly fixed thereon by rivets H, shown in- Fig. I, and said plate has the upwardly extending flange I2 which, as shown in Fig. II, is adapted to be engaged by the hook block 23 which is carried by the bolt 14 in said truck frame 4 and adjustably secured by any suit- "40 able means, for instance, the wing nut 55 and the lock washer l6; shown in Fig. II, with the effect of rigidly clamping said container and its cover I in closed position on said truck frame. h

Said removable cover I carries the entire metering pump and dispensing structure, contained within the casing l8. Said casing is conveniently detachably connected with said cover I bya circular series of three screws it, one of which is shown at the right of Fig. III. The holes IQ for the other two screws are shown in Fig. IV.

As shown in Fig. III, said casing It! has the screw threaded socket 20 at the bottom thereof engaged with the upper end of the pump cyl inder 2! which extends to the bottom of the liquid containing space in the container i. Said Cylinder has at its lower end the casing 23 in which the foot valve 24 is mounted for vertical The piston 25 is mounted to reciprocate in said cylinder 2i with the piston ring 25* in contact ,"therewith. :Said piston has a circular series of ports 25 extending vertically therethrough,

' which are normally closed by the piston valve 26 which is a disk mounted to reciprocate vertically on the piston rod 21, which is rigidly connected with said piston 25 by the nut 27*. Said rod 21 has lateral projections 211* which limit the vertical reciprocation of said piston valve it. That construction is such that when the piston is drawn upwardly the valve 25 is closed and the valve 2d is opened and the liquid drawn into the cylinder 2 l. However, upon downward movement of said piston 25 by the rod 2'! the valve 2 is closed to trap the liquid in the cylinder 25 and the valve '26 is opened to permit the liquid to pass through the piston ports 25 above the piston, so that when the'piston is again raised liquid is not only drawn into the cylinder below the, piston, but, the liquid alcovev the piston is" discharged from the upper end of said cylinder. Such reciprocation of the piston 25 is effected by providing the upper end of said rod N with the gear rack H shown in Fig; III, which is casing i3.

mounted to slide inthe bearing 2W in said As shown in Fig. III, the teeth of said rack 2'1" are engaged with the sectoral gear 29 which is mounted toturn through an arc of one hundred eighty degrees in the bearing 2% in said casing i8, so that the extent of the vertical reciprocation of said piston is limited by the arcuate extent of the teeth of said sectoral gear 29.

As shown in Fig. III, said sectoral gear 29 has a in unitary relation therewith the cam 38 having tremely rugged in construction, and consequently opposite; parallel plane abutment surfaces St and 39 means for limiting/the.reciprocation of the pis ton are not only positive in operation, but exdurable.

I find it convenient to form said sectoral gear 29 and cam 30 in unitary relation with the fulcrum shaft iii of the lever 32, shown in Fig. II. Said lever is provided at its free-end with the handle 32 for through an arc of one hundred eighty degrees fromthe position of said lever indicated infull lines in Fig. III, in which the piston 25 is at-the lower limit of its stroke, to the position indicated in dotted lines in Fig. III, in which the piston is :at the upper limit of its stroke.

, The lubricant liquid with more or less air and other gas occluded therein thus raised from the container 5 through the cylinder 2! is squeezed through the air separatorchamber 34, shown in Fig. III. Said chamber has the liquid discharge port 3% and the restricted discharge vent 3 5 for the lighter fluids, including air and otherogases whichv are separated from the viscous liquid as convenient manual oscillation the latter is squeezed insaid chamber 34 by the pressure of said piston on each of its upward strokes.

As shown in Fig. VIII; said restricted vent 36 is in communication with the passageway 36 extending downwardly through said casing l8, and opening through said cover I into the in terior of said container I, so that any liquid carried out with the extruded lighter fluids is returned to the mass of fluid in said container.

The liquid port 35 from said separator cham.-,

ber 34 is normally closed by the ball alve 3'2 under pressure of the helical spring 38 which is designed to ofier the proper amount of resistance to the passage of liquid through said port to effect the elimination of the lighter fluids from the liquid Which is to be dispensed. Said port 35 leads to the meter chamber 39 which, as shown inFig. VI, contains the pair of similar rotary displacement elements 48 and 4! respectively rigidly connected with shafts 4m and M The upper ends of said shafts are journaled in the diaphragm I8 of said casing I8, andthe lower ends of said shafts are journaled in the base member l8 of said casing 58 which serves as an abutment for the lower end ofsaid spring 38 and as a cover for said chamber 39. Said base member l8 is rigidly connected with said casing 58 by a circular'series of ten screws I8, the head of one of which is shown at the right of Fig. III. The ten holes i in the casing l8 in which said screws are engaged are shown in Fig. VI.

As shown in Fig. VIII; said shafts Ml and M arerespectively rigidly connected with the intermeshed gears 46 and M in thegear chamber. M3. The pinion 45, which is rigidly connected with said shaft 46*, is in mesh with the gear d6 on the shaft 4'! which is journaled in the plate 48 which forms the top wall of said gear chamber 44. Said plated? is rigidly connected with said casing 18 bysix screws 48*; of which two are shown in Fig. VIII. The holes for said screws are shown at it in Fig. ,V. Said plate as is precisely located, in said casing l8, by two studs 48 on said casing which project into holes in said plate, as shown in Fig. III.

As shown in Fig. VIII; said shaft 4'! is rigidly connected with the pinion 49 in mesh with the gear 50 in the register chamber it of said casing l8. Said gear 55 is rigidly connected with the register driving shaft 5! journaled in the reg-- ister casing 52 and in the dial plate 53; which latter is held in said casing is by screws 5.3" and carries said casing 52'. The pinion 54 in said casing 52 is rigidly connected with said shaft '5! and in mesh with the friction driving gear 55 of the register mechanism. Said gear 55 is journaled on the sleeve 56 between the reset cam 56 and the friction ring 56 which latter is fixed on the end of said sleeve. The dished plate spring 58 bears against. the lower end of said cam 55 and its perimeter presses said gear into frictional engagement with 7 said ring EG Said sleeve 56 is rigidly connected with the indicator shaft which carries the rotary index pointer 6|; so that turning movement of said friction driving gear 55 normally turnssaid pointer 6! which traverses the circular scale of graduations 53 on said dial plate 53.

The arrangement of said registering and indicating mechanism is such that the latter mani- 40 and 4l,.through said chamber 39, its outlet port 63 and the hose coupling 64. For instance, the graduations 53 indicate volumetric units, conveniently pints and fractions thereof. However, the dial 53 may be graduated to indicate the quantity of grease dispensed in liters, pounds, or other units.

Said coupling (it is connected with the flexible dispensing hose 55 which has at its free end the nozle provided with the check valve 6'! to prevent dripping of the liquid from said nozle in the intervals between dispensing operations.

Inorder to zeroize said pointer ti with respect to said scale 53*, I rigidly connect the bevel gear 69 with said shaft til. As shown in Fig.

III, the bevel pinion H3 is in mesh with said bevel gear 69. Said pinion is fixed. on the zeroizing shaft II which is journaled in the bearing bracket 52 on the casing 52 and adapted to be manually turned by the knob i i on said shaft H, only in the direction of the arrow on said knob, to return said pointer Elite zero. Said knob ll is journaled in the bearing m in said casing i8, and engages said shaft only by a pawl within the knob, so that the latter cannot be turned to advance said pointer by engagement with shaft H; has its outer end connected with said register casing 52 and its inner end engages the single ratchet tooth 5d of said reset cam 56 and stops said sleeve 56 and the pointer til at zero position, when the latter is turned counterclockwise by the manual rotation of the knob H in the direction of the arrow on said knob in Fig. III, despite the frictional engagement of said spring 58 with said gear tit, which turn said pointer clockwise.

Such a zeroizing operation should be manually effected after each dispensing operation; when said gear 55 is idle and is held stationary by the then stationary liquid compressed in the meter chamber 39, which then holds stationary the displacement elements 40, ll and the gearing train connecting them with said gear 55.

As the shafts 40 M and ll are not provided with any packing means, it is possible that after continued use, the liquid being dispensed may seep into the register chamber I8 Therefore, I find it convenient to provide the drain hole 36* drilled in the casing l8 from said chamber Hi into, the drain port 3%, as shown in dotted lines in Fig. III; so that any such surplus liquid may escape back into the subjacent container through said drain port 36 I prefer to provide said casing it with the readily removable transparent cap la conveniently formed of Bakelite, Pyrolin, or other flexible resilient plastic material. However, the indicator may, of course, be used without any cover.

Therefore, I do not desire to limit myself to the precise details of construction, arrangement, or method of operation herein set forth, as it is obvious that various modifications may be made therein without departing from the essential features of my invention as defined in the appended claims.

I claim: i

1. In liquid dispensing apparatus, including a pump cylinder, a piston mounted to reciprocate in said cylinder, a rod rigidly connected to said piston at one end, a gearrack rigidly connected with the other end of said rod, a gear in mesh with said rack, and a shaft carrying said gear; the combination with a single cast metal casing including a socket rigidly connected to one end The pawl l2, shown in Fig, VIII,

of said cylinder, a slide bearing for said rack, a journal bearing for said gear and shaft, a

separator chamber for liquid and lighter fluids, a

with said meter members, journaled in parallel bearings in said casing, and extending from said meter chamber into said gear chamber; registering mechanism, in said register chamber; in-

termeshed gears in said gear, casing, respectively rigidly connected with said shafts; a pinion on one of said shafts, in said gear chamber; and a trainof gearingin said gear chamber, and extending in said register chamber, operatively con,- necting said pinion with said register mechanism.

2. In liquid dispensing apparatus, including a pump cylinder, a piston mounted to reciprocate in said cylinder, a foot valve in said cylinder, a check valve in said piston, and a rod rigidly connected to said piston at one end; the combination with a gear rack rigidly connected with the other end of said rod, having a series of gear teeth and two toothless abutment surfaces, respectively at opposite ends of said series; of a sectoral gear having an arcuate series of teeth continually in mesh with said rack teeth; and a cam integral with said gear and having two abutments, respectively at the opposite ends of said series of gear teeth, adapted to alternately contact with said abutment surfaces on said rack; a fulcrum shaft in integral coaxial relation with said gear and cam; and a hand operative lever, rigidly connected with said shaft; whereby, the moverevolution of said shaft, and the extent of the stroke of thepiston is positively limited bysaid cam.

3. In liquid dispensing apparatus, including a pump cylinder having a foot valve at one end thereof, a piston mounted to reciprocate in said cylindena check valve carried by said piston, a

piston rod having one end rigidly connected with said piston, and a gear rackrigidly connected with the other end of said rod; of a casing having a'socket rigidly connected with the end of said cylinder opposite to said foot valve; a fulcrum shaft bearing in said casing; a fulcrum shaft journaled in said bearing; a sectoral gear carried by said shaft and in mesh with the teeth of said rack; a cam carried by said shaft, having means for limiting the reciprocatory movement of said piston by encountering said rack; a handle lever rigidly connected with said fulcrum shaft, whereby said shaft and sectoral gear may be oscillated through an arc of less than one revolution and positively, stopped by said cam at each said casing; whereby the liquid to be dispensed may be drawn into said cylinder past said foot valve and squeezed from said cylinder into said separator chamber by oscillation of said lever and consequent reciprocation of said piston; a restricted vent opening from said separator chamber for the escape of lighter fluids squeezed from the liquid to be dispensed; a liquid outlet port from said separator chamber; a spring pressed -ment of said lever is limited to less than one 65 end of its movement; a separator chamber in check valve normally closing said liquid outlet port; a meter chamber in said casing in communication with said outlet port from said separator chamber; an outlet port from said meter chamber and a hose'coupling leading from said outlet port; a flexible dispensing hose connected with said coupling; a pair of displacement rotary elements mounted in said meter chamber with their axes parallel and each including projections which mesh with the other; respective axial shafts rigidly connected with said rotary elements and journaled in said casing; a gear chamber in said casing adjoining said meter chamber, and into which the shafts of said rotary elements project; respective gears fixed on saidshafts in said gear chamber and in mesh with each other; whereby said rotary elements are rotated in opposite directions by the passage of the liquid through said meter chamber under pressure from said piston; a pinion fixed on the shaftof one of said rotary elements in said gear chamber; indicating mechanism including a rotary index pointer, in coaxial relation with a circular scale having graduations indicating volumetric units; registering mechanism operatively connected with said pointer and including a drivinggear; a train of gearing connecting said pinion with said driving gear, whereby the quantity of liquid dispensed through said meter chamber is measured and registered by said indicating mechanism; and means, journaled in said casing,

' shaft journaled in said bearing; a sectoral gear carried by said shaft and in mesh with the teeth of said rack; a cam carried by said shaft, having means for limiting the reciprocatory movement of said piston by encountering said rack; a handle lever rigidly connected with said fulcrum shaft, whereby said shaft and sectoral gear may be oscillated through an arc of less than one revolution and positively stopped by said cam at each end of its movement; a separator chamber in said casing; whereby the liquid to be dispensed may drawn into said cylinder past said foot valve and squeezed from said cylinder into said separator chamber by oscillation of said lever and consequent reciprocation of said piston; a restricted vent opening from said separator chamber for the escape of lighter fluids squeezed from the liquid to be dispensed; a liquid outlet port from said separator chamber; a spring pressed check valve normally closing said liquid outlet port; a meter chamber in said casing in communication with said outlet port from said separator chamber; an outlet port from said member chamber and a hose coupling leading from said outlet port; a flexible dispensing hose connected with said coupling; a pair of displacement rotary elements mounted in said meter chamber with their axes parallel and each including projections which mesh with the other; respective axial shafts rigidly connected With said rotary elements and journaled in said casing; a gear chamber in said casing adjoining said meter chamber, and into which the shafts of said rotary elements project; respective gears fixed on said shafts in said gear chamber and in mesh with each other; whereby said rotary elements are rotated in opposite directions by the passage of the liquid through said meter nism operatively connected with said pointer and including a driving gear; a train of gearing connecting said pinion with said driving gear, whereby the quantity of liquid'dispensed through said meter chamber is measured and registered by said indicating mechanism; means, journaled in said casing, for zeroizing said registering mechanism; a base member for said casing forming a detachable cover for said meter chamber;

means detachably rigidly connecting said base member with said casing; a cover for a container for the material to be dispensed, having an opening; and means detachably securing said casing and base member in rigid relation with said cover with the vent for lighter fluids in said casing in registry with the opening'insaid container cover; whereby the fluids escaping through said vent in the separator chamber are discharged thrcugh said container cover.

5. In liquid dispensing apparatus, the combination with a pump cylinder having a foot valve at one end thereof; of a piston mounted to reciprocate in said cylinder; a check valve carried by said'piston; a piston rod having one end rigidly connected with said piston; means on said rod limiting the opening movement of said piston valve; a gear rack rigidly connected with the other end of said rod; a casing having a socket rigidly connected. with the end of said cylinder opposite to said foot valve; a fulcrum shaft bearing in said casing; a fulcrum shaft journaled in said bearing; a sectoral'gear carried by said shaft and in mesh with the teeth of said rack; a cam carried by said shaft forming abutment means for limiting the reciprocatory movement of said piston by said abutment means alternately encountering said rack; a handle lever rigidly connected with said fulcrum shaft, Whereby said shaft and sectoral gear may be oscillated through an arc of less than one revolution and positively stopped by said abutments at each end of its movement; a separator chamber in said casing; whereby the liquid to be dispensed may be drawn into said cylinder past said foot valve and squeezed from said cylinder into said separator chamber by oscillation of said lever and consequent reciprocation of said piston; a restricted vent opening from said separator chamher for the escape of lighter fluids squeezed from the liquid to be dispensed; a liquid outlet port from said separator chamber; a valve for said liquid outlet port; a spring in said casing normally closing said port by said valve; a meter chamber in said casingin communication with said outlet port from said separator chamber; an outlet port from said meter chamber, through which the liquid is dispensed; a hose coupling 7 leading from'said outlet port; a flexible dispensing hose connected with said coupling; a pair of displacement rotary elements mounted in said meter chamber with their axes parallel and each including projections which mesh with the other; respective axial shafts rigidly connected with said rotary elements and journaled in said mesh with each other; whereby said rotary elements are rotated in opposite directions by the passage of the liquid through said meter chamber under pressure from said piston; a pinion fixed on the shaft of one of said rotary elements 10 in said gear chamber; indicating mechanism ineluding a rotary index pointer, in coaxial relation with a circular scale having graduations indicating volumetric units; registering mechanism operatively connected with said pointer and ineluding a driving gear; and a train of gearing connecting said pinion with said driving gear,

whereby the quantity of liquid dispensed through a said meter chamber is measured and registered by said indicating mechanism.

JAY RE 'ISEMA.

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