US1943603A

US1943603A - Grease pumping mechanism

Info

Publication number: US1943603A
Application number: US502461A
Authority: US
Inventors: George H Hartman
Original assignee: Aro Equipment Corp
Current assignee: Aro Equipment Corp
Priority date: 1930-12-15
Filing date: 1930-12-15
Publication date: 1934-01-16
Anticipated expiration: 1951-01-16

Description

Jan. 16, 1934. G. H. HARTMAN 1,943,603

--GREA$E PUMPING MECHANISM v 3 Sheets-Sheet 1 Filed Dec. 15, 1930 Jan. 16, 1934. HARTMAN 1,943,603

GREASE PUMPING MECHANI SM Filed Dec. 15, 1950 3 Sheets-Sheet 2 Jan. 16, 1934. M N 1,943,603

GREASE PUMPING MECHANISM 3 Sheets-Sheet 3 36 55 Way/71w 66 @5 Zea/ya 2i far/mm f/fll ifeds gm 7W Y liar/7y! 35 of use.

Patented Jan.16, 1934 I 7 1,943,663

UNITED STATES PATENT OFFICE GREASE PUMPING MECHANISM George H. Hartman, Bryan, Ohio, assignor to The Arc Equipment Corporation, Bryan, Ohio, a corporation of Ohio Application December 15, 1930 Serial No. 502,461

4 Claims. (Cl. 10350) This invention relates to grease pumping mech- Figure 3 is a perspective view of the lower end anism and in particular'to such mechanism opof the tube shown at the bottom of Figure 2. erable by fluid pressure. My invention prefer- Figure 4 is a perspective view of a cover plate ably takes the form of a pump actuated on both used to, seal the opening in the top of the con- 5 the intake and the delivery strokes by fluid preS-' tainer. 60

Isure. In a grease pump of this nature now in Figure 5 is an enlarged vertical sectional view general operation, it is customary to provide a taken along the line 5-5 of Figure 1. spring to work the pump piston on the intake Figure 6 is a sectional view on the line 66 of stroke. As the springs are generally located in Figure5. an inaccessible manner, and as they are liable Figure 7 is an enlarged sectional view of a 5 l to breakage, I have provided means for fluid pres-- controlling valve and is taken on the line 7-7 of sure operation on the intake stroke as well as the Figure 5. delivery stroke. Figure 8 is a sectional view of the controlling As the grease comes to the user in large drums valve on the line 88 of Figure '7 showing the up to a 400 lb. size I have arranged my pump for valve in one operating position. 7 i mounting external of the container, as for Figure 9 is asimilar sectional view of'the valve,

instance on a wall bracket. Then I have proexcept in the opposite operating position. vided a suction tube to extend from the container Figure 10 is a perspective view of a flange joint to the pump. This forms one of the objects of forming a. part of the'suction mechanism; and 26 my invention. As the suction tube is only a light Figure 11 is a plan view of a controlling valve piece of tubing or pipe, the heavy pump mechadisc. I nism need not be lifted in and out of the grease Referring to the drawings,'1 designates a grease container, but rather the grease container is container having a hole 2 at the upper end there'- moved to and from under the pump. of covered in the present instance by a plate 3. 25 Another object of my invention is to provide Extending into t e Container 1 through a o e 4 .I means whereby the pump will charge a grease de-- in the plate 3 is a tube 5 (Figures 2 and 4) The livery line with grease under pressure and win tube 5terminates at its lower end inabell shaped maintain this pressure during pump delivery member 6. (Fi 2 and Which is ove ed at operations, the pump being automatically reits lower end by a screen 7. The screen '7 is fast- 30 versed to a suction stroke at the completion of ned a its Outer P p y t0 t l mbe each delivery stroke. This automatic operation 6 in any sui a l m or a in t p nt i will eliminate the attention of the operator sta e by a s r w 8 i s rt d u h t e s r en and enable the delivery'of substantially the en-' into a bridge 6a whi forms a p Of the tire contents of the grease container to the point he 6.

' At the end of the tube'5 opposite that end car- Another object of the invention is to provide Tying the member 6 i a a e 9 connecting with ti means that 111 trai t foreign ai and bolted to another flange 10 which is fastened ter from the grease. to the lower end of a tube 11 projecting from the Another object of the invention is to provide bottom o a P p piston The P p Of the 40 suction means that will distribute the efiective ube 5 a d the associated parts just io d suction area over a large portion of the bottom will be explained hereinafterof the container. Slidably mounted for reciprocatory movement Further objects and advantages of my invenover the top of the piston 12 is a cylinder 13. The tion are apparent for the following detailed decavity formed between the top of the piston 12 45 'scription. y and the internal upper surface of the cylinder 13, While the invention in its broader aspect is it is evident, will be increased in volume when capable of embodiment in various forms, a prethe cylinder'ascends, and will be decreased when 'ferred embodiment thereof, and of the mechait descends. It is evident thatwith the tube 5 im-' nism forming the same, are illustrated in the mersed in the grease 1a of the container 1, upon 50 accompanying drawings in which an upward travel of the cylinder 13, grease will Figure 1 is a side elevation of a grease containbe sucked from the container 1 into the tubes 5 u er with the mechanism of my invention mounted and 11 and from the tube 11 into a passage 14 of thereon. the piston 12. Internal of the piston 12 is an- Figure 2 is a front elevation of the same with other passageway 15 uniting at its lower end with 55 portions broken away. a delivery line 16 (Figure 5). At the upper end in the valve 39 (Figures 7 and 11).

of the piston 12 is a valve 17 which in the present instance is shown as a flat disc prevented from falling out of the valve retaining cavity by a bent wire 19. Located in the delivery line 16 is a check valve 20 which permits grease to flow from the passageway 15 into the line 16 but which prevents a return flow from the line into the passageway. It is also evident that the valve disc 17 prevents grease internal of the cylinder 13 from returning into the passage 14, as is also more fully described hereinafter.

A second cylinder 21 is mounted over the cylinder 13 and the cylinder 13 is slidably arranged for reciprocating therein. The top end of the cylinder 21 is closed. The other end thereof is open and is fastened by screws 22 to the upper portion of a spacer 23. The spacer 23 serves to hold the cylinder 21 in operating relation to the cylinder 13. The lower end of the spacer is fasti ened by screws 24 to an outstanding base portion 18 of the piston 12. (Figure 5.)

The cylinder 13 near its upper end is enlarged to form a flange 25 which serves as a support for cup leathers 26. Ring members 2'7 are arranged, one in each cup leather 26 and clamped against the leathers by screws 28 which project through the lower ring 27, the flange 25 and both leathers 26, and are screwed into tapped holes in the upper ring 27.

At the upper end of the spacer 23 are screws 29 holding a ring 30 which clamps a cup leather 31 into operative contact with the lower, outer periphery of the cylinder 13. At the lower end of the cylinder 13 is a ring 32, a spacer 33 and cup leathers 34, all secured to the lower end of the cylinder 13 by screws 35.

A pipe 36 carries, in the present instance, compressed air into a valve chamber 37 through a valve cover 38. A valve disc 39 is mounted for rotating movement on a valve seat 40 and is guided by engagement of its periphery with a bored out portion 39a of the valve body 41 against other than rotary movement on the seat 40 (Figure 7). The valve seat 40 has a port 43 leading to the upper end of the cylinder 21 through a pipe 44. A port 42 leads to the lower end of this cylinder 21 through a pipe 36a. Both the pipes 36a and 44 are fitted with unions 45 to facilitate ready assembly. A third port 46 leads from the valve seat 40 to external of the valve body 41. Coacting with the valve 39 at its end opposite the seat 40 is a valve stem 47. Its end is flattened to enter into a rectangular slot 48 Internal of the stem 4'? and at this same end is a hole carrying a coiled contractile spring 49. The center portion of the stem 47 is enlarged into a bevel seat coacting with, and arranged for rotary movement in, a beveled seat portion of a Babbitt sealing ring 50 carried in the cover 38. The end of the valve stem 4'7 opposite the valve disc end carries, for fixed movement therewith, one end of a lever 51. It is evident that when air pressure enters through the pipe 36 into the valve chamber 37, it presses the valve disc tight against the seat 40 and at the same time the bevel seat of 43'with the exhaust port 46 when the inlet port 52 is contacting with the port 42, as in Figure 9. It is now evident that with the valve disc rotated to the position shown in Figure 3, compressed air will pass from the pipe 36 into the valve chamber 37, through the port 52 into the port 43 and the pipe 44, then to internal of the cylinder 21, forcing the cylinder 13 downward and forcing grease disposed internal of the cylinder 13 into the passage 15 and through the pipe 16, the check Valve 20, and a delivery hose 20a to a shut off nozzle 21a. It is also evident that upon reverse operation of the valve disc 38 to the position shown in Figure 9, the air trapped internal 0f the cylinder 21 will be released to atmosphere through the slot 54 and the port 46 by reason of the port 46 being united by the slot 54 with the port 43 and the pipe 44. Also that with the 'valve discin the position shown in Figure 9,

compressed air will flow from the pipe 36 into the pipe 36a and the lower end of the cylinder 21 thereby elevating the cylinder 13 to the position shown in Figure 5. Upon this upward movement,

it is now evident that grease will flow to internal of the cylinder 13 from the passage 14, being forced thereinto by atmospheric pressure on the grease 1a in the container 1.

In order to control this pumping movement of the cylinder 13 automatically, I have provided a rod 55, slidably passing through the ring 32, the cups 34 and the spacer 33, a head 56 being screwed onto the upper end thereof. On the lower end of the rod 55 is screwed an enlarged portion 57 into which is fastened pins 58 and 59. The portion 57 is guided for reciprocatory movement in a hole 60 drilled through the web of the piston 12 as shown in Figure 5. Pivoted on a lug 61 extending-from the base of the piston 12 is a lever 62, the lever being rockable about its pivot screw 63. To one end of the lever 62 is pivoted for rocking movement, one end of a link 64. The opposite end of this link is slotted. a pin 65 extending out from the free end of the lever 51 for travel in the slot therein. Between a pin 66 extending out from the link 64, and a pin 67 extending from the lever 62, is a coil extension spring 68, which serves to hold the parts 62-64 and 51 in the relation one to the other as is shown in the full line position (Figure 5) or the. dotted center line position, 62a64a and 51a. It is evident that this full line position of the linkage 62-64 and 51 brings the valve disc 39 into the position shown in Figure 3 and that the dotted center" position 62a-64a and 51a brings this valve into the position shown in Figure 9. Also it'is evident that these two positions of the linkage are obtained by up and down travel of the cylinder 13 alternately moving the upper leather 34 into contact with the end 56 of the rod 55 and then the ring 32 into contact with the shoulder formed by the upper end of the enlargement 57,'for thus bringing the pin 59 into contact with the lever 62 and then the pin 53 into contact therewith. In Figure 5, the pin 59 has already contacted with the lever 62 and forced it past the center line formed by drawing a line between the pivots of the levers 51 and 62 and the spring 68 has snapped the lever 62 away from contact with the pin 59 and into the full line position shown. As this is a conventional form of toggle movement, it is thought that no further description or disclosure is needed. The valve body 41 is fastened into the base portion of the piston 12 by screws '70.

Any suitable method may be used for mountiso ing the pump assembly upon a wall a. as for instance by providing a bracket 71 as shown in Figures 1 and 2.

The cover plate 3 has four spring-like straps 72 riveted to it so that they have rubbing contact with the tube 5. It is evident that the plate will remain at any point on the tube 5 to which it may be moved by reason of the spring tension elfect of the straps 72.

The operation of the device is as follows:

The cover plate 3 is removed from the original container 1 of grease or other lubricant that will flow, and which it is desired to deliver through piping to a source of use. Into this opened top is inserted the tube 5 with its associated end 6.

At the top end of the tube 5 is screwed the flange 9. This flange has slots 75 and '76, which line up with the bolt holes in the flange 10 carried by the pipe 11. Two bolts 7'7 and nuts 78 are now tightened, holding the two flanges together and permitting flow of grease up through the tube 5 into the tube 11 and the piston 12 when the cylinder 13 is reciprocated in pumping operations. A gasket 78a can be inserted between the abutting surfaces of the flanges 9 and 10 if this is found n cessary to stop leakage. Compressed, air is now turned into the pipe 36 and the pumping cycles will start and continue until the pipe 16 has been filled with grease at a pressure that will balance pressure due to the air on top of the cylinder 13. It will be seen that the area of the head of the cylinder 13 is considerably larger than the area of the head of the piston 12. It is evident that the delivery pressure of the grease in the passage 15 will be as many times greater than the entering air pressure in the pipe 36, as the head of the cylinder 13 is greater in area than the head of the piston. This is of advantage as the air pressure seldom runs over 150 lbs. per sq. inch and grease can easily be carried to the pipe 16 at 400 to 600 lbs. per sq. inch, on in fact any pressure that may be found desirable, and which may come within the ratio of cylinder to piston head area.

An eyebolt-79 is shown to enable lifting the mechanism easily during its installation or removal from the wall bracket 71.

I wish it understood that the particular form of mechanism illustrated as an embodiment of my invention and the different parts thereof illustrated and described, are merely a typical method of carrying my invention into effect, and that the specific construction described herein is merely by way of illustration and is not to be construed as limiting or narrowing my claims, as obviously, changes in constructions and design can be made without departing from my invention and such changes are contemplated by me, and would not involve any departure from my invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. For use with a container for grease or the like, a stationary tubular piston having an intake end extending into said container, a tubular plunger over said piston, a stationary cylinder over said tubular plunger and enclosing the end thereof opposite said intake end, means for reciprocating said tubular plunger relative to said tubular piston and said cylinder, a passageway through said piston from the inner end thereof to a point beyond one limit of travel of said plunger through which grease may be expelled from between said piston and said tubular plunger.

2. For use with a container for grease or the like, a stationary tubular piston having an intake end extending into said container, a tubular plunger over said piston, a stationary cylinder over said tubular plunger, said tubular plunger having a closed end located in all positions of its travel within said stationary cylinder, means for introducing fluid pressure into said cylinder for reciprocating said tubular plunger relative to said tubular piston and said cylinder and means for conducting grease from between said piston and said tubular plunger to a point external of said container.

3. For use with a container for grease or the like, a stationary tubular piston having a lower end extending into said container, a tubular plunger over said piston, a stationary cylinder over said plunger having its lower end sealed around said plunger, said tubular plunger having a closed upper end located within said station ary cylinder and enlarged to form a fluid pressure piston and means for alternately introducing w fluid pressure above and below said fluid pressure piston.

4. For use with a container for grease or the like, a stationary tubular piston having a lower end extending into said container, a tubular plunger over said piston, a stationary cylinder over said plunger having its lower end sealed around said plunger, said tubular plunger having a closed upper end located within said stationary cylinder and enlarged to form a fluid pressure piston, a passageway through said tubular piston from the upper end thereof to below the lower limit of travel of the lower end of said tubular plunger, and means for alternately introducing fluid pressure above and below said fluid pressure piston.

GEORGE H. HARTMAN.