US 3473479 A
Description (OCR text may contain errors)
Oct 1969 E. P. SUNDHOLM 3,473,479
BARREL PUMP AS SEMBLY Filed July '7, 196'? 2 Sheets-Sheet l //IIIIIIIIIIIIII';???II IIIII.
EDWIN P. SUNDHOLM Oct. 21, 1969 E. P. SUNDHOLM BARREL PUMP ASSEMBLY 2 Sheets-Sheet 2 Filed July 7, 1967 FIGS v L 3 x w 3 8 2 xvi|l 0 v f/lM/V a 4 v. .m. 4 3 4 b a w 7 f 3 m. 2 o w. 6 3 3 8 3 6 2 A A/ \\\\\i /3 m 3 1.\"v'E.\'T0R: EDWIN P. SUNDHOLM US. Cl. ltl3218 3 Claims ABSTRAQT OF THE DISCLOSURE A barrel pump assembly which includes a cylinder and a base. The cylinder is slidably received in the base and is releasably secured therein by cone-shaped lugs or projections extending outwardly from the cylinder and base and a clamp. The clamp is provided with recesses which receive the projections and prevent movement of the cylinder projections with respect to the base projections and which urge the cylinder into fluid-tight engagement with the base. The base is provided with spaced outer and inner side walls to provide an air passage from the bottom of the base to the side of the base.
BACKGROUND OF THE INVENTION Barrel pumps are generally provided with a base which is adapted to be threadedly engaged with the bung of a barrel, a pump cylinder which is threadedly received by the base, and a spout which is threadedly engaged with the top of the pump cylinder. When the pump is inserted into the barrel, it is desirable to have the spout extending over the top of the barrel so that the container that is to be filled by the pump may be supported by the top of the barrel. However, after the pump is screwed tightly into the bung, the spout frequently extends over the side of the barrel rather than the top. In order to reposition the spout, the operator would continue to exert rotational force on the spout and the cylinder, and frequently the gaskets and threads at both ends of the cylinder would be damaged. When the operator attempted to remove the pump from the barrel, he would often cause the spout to unscrew from the cylinder or the cylinder from the base rather than unscrewing the base from the barrel.
SUMMARY OF THE INVENTION The inventive barrel pump assembly eliminates the foregoing disadvantages. The spout may be permanently secured to the cylinder without the use of threads, and the cylinder is releasably secured within the base without any threads by lugs and a clamp. If the spout is positioned incorrectly after the base has been screwed tightly into the barrel, the clamp may be loosened and the cylinder may be rotated with respect to the base to reposition the spout over the top of the barrel. Tightening the clamp urges the cylinder into a fluid-tight seal with the base, and when the clamp is in place, the pump can be unscrewed from the barrel without unscrewing the cylinder from the base. The unique base further provides a large air vent to ensure smooth operation of the pump and is located so that water cannot seep into the barrel.
DESCRIPTION OF THE DRAWING FIG. 1 is a perspective view of the inventive barrel assembly positioned in a barrel;
FIG. 2 is an elevational sectional view of a barrel pump provided with the inventive barrel pump assembly;
FIG. 3 is an enlarged fragmentary view of a portion of FIG. 2;
FIG. 4 is a fragmentary view showing the clamp and lug means;
ite States Patent F 3,473,479 Patented Oct. 21, 1969 FIG. 5 is a plan view of FIG. 4 with the clamp rotated about 45;
FIG. 6 is a fragmentary section view of the lug means with the clamp in place;
FIG. 7 is a view similar to FIG. 6 showing the lug means before the clamp is tightened;
FIG. 8 is a sectional view of the clamp; and
FIG. 9 is an exploded sectional view similar to FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIG. 1, the numeral 10 designates generally a barrel pump which is threadedly engaged with the top 11 of a barrel or drum 12. The bung or threaded hole of the barrel top 11 which receives the pump is usually located adjacent the periphery of the barrel top. When the barrel pump 10 is positioned in the barrel, it is generally preferable to have the spout 13 of the pump extend radially inwardly over the barrel top so that the container 14 which is to be filled may be supported by the barrel top while the pump is operated.
Referring now to FIG. 2 the pump 10 is seen to include spout 13 which extends outwardly from spout head 14, and handle 15 which is pivotally secured to the spout head 14 by means of link 16 and bracket 17. The spout head is inserted over the top of elongated pump cylinder 18 and is maintained in sealing engagement therewith by O-ring 19. The spout head and the pump cylinder may advantageously be permanently secured as by spot welding. Piston 20 is carried by piston rod 21, which is slidably received by the spout head and pivotally secured to the handle 15.
Base 22 slidably receives the lower end of cylinder 18, and suction tube 23 is threadedly engaged with the lower end of base 22. Suction tube 23 advantageously includes inner and outer telescoping members 24 and 25, respectively (see FIG. 1) with an O-ring disposed therebetween.
As can be seen best in FIG. 3, base 22 includes a generally cylindrical outer shell 26, an outer sleeve 27, and an inner sleeve 28-. The outer sleeve 27 is generally cupshaped and is received by the outer shell 26. If desired the outer shell and outer sleeve may be permanently secured as by spot welding. The wall 29 of the outer sleeve is provided with threads 30 to engage the threaded bung of the barrel, and the bottom 31 of the outer sleeve is provided with an internally threaded upstanding flange 32 which threadedly receives suction tube 23.
Inner sleeve 28 is also generally cup-shaped and extends generally upwardly from flange 32 and flares outwardly as at 33 toward the wall 29 of the outer sleeve.'= The bottom of the inner sleeve is provided with opening 2817 which receives the flange 32, and O-ring 34 may be inserted between the inner sleeve 28 and the bottom 31 of the outer sleeve adjacent flange 32 to provide a fluid-tight seal therebetween. The wall 28a of the inner sleeve is spaced from the wall 29 of the outer sleeve to provide air passage 35 which connects opening 36 provided through the walls of the outer sleeve 27 and the outer shell 26 and opening 37 provided through the bottom wall of the outer sleeve.
The outer shell 26 extends outwardly above the threads 30 of the outer sleeve to form collar 38 which receives O-ring 38a. When the body portion is threaded into the bung of the barrel, the O-ring 38a maintains a fluid-tight seal between the pump and the barrel. Air opening 36 is positioned above the collar 38 and communicates with the barrel interior by means of air passage 35 and air opening 37. The position of air opening 36 in the side of the base spaced from the top of the barrel substantially eliminates the possibility of water seeping into the drum through the air vent.
Valve cage 40 is positioned within base 22 above the outer sleeve 27 and is provided with an annular valve seat 41. The periphery of the valve seat is received by a circular gasket 42 which is seen to be generally U- shaped in cross section. Valve 43 is carried by the valve cage 40 and is urged into sealing engagement with the valve seat 41 by spring 44. The valve cage and gasket 42 are removably wedged within outer shell 26 and are supported by flare 33 of the inner sleeve 28.
Referring now to FIGS. 4 and 5, base 22 is seen to be provided adjacent the top thereof with circumferentially spaced lugs or projections 45. Pump cylinder 18 is provided with similar lugs 46 extending outwardly at a point slightly above the top of base 22 when the pump cylinder is received by the base. The lugs 45 and 46 are preferably cone-shaped or bullet-shaped, and in the particular embodiment illustrated both the base and the pump cylinder are provided with four projections spaced 90 apart. It is to be understood that other shapes and arrangements of the projections may be used.
The pump cylinder and the base are releasably clamped against relative rotational movement by generally cylindrical clamp 47, which preferably comprises a pair of semi-cylindrical clamp portions 47a and 47b which are joined by bolts 48 and nuts 49. Each clamp portion is provided with a pair of radially outwardly extending flanges 50 which are provided with bolt holes 51 for the receipt of the bolts 48. Each clamp portion further includes an upper portion 52 having approximately the same radius of curvature as that of the pump cylinder and a lower portion 53 having approximately the same radius of curvature as that of the outer shell 26. As can be seen best in FIG. 8, the upper clamp portion 52 is provided with recesses 54, and the lower clamp portion 53 is provided with recesses 55. The inside surfaces of recesses 54 and 55 have approximately the same contour as the outside surfaces of lugs 46 and 45, respectively, and the circumferential spacing of the recesses is approximately the same as the spacing of the lugs.
The spacing of the base lugs 45 from the top of the base, the spacing of the pump cylinder lugs 46 from the bottom of the pump cylinder, and the spacing between the upper and lower recesses 54 and 55 are all such that when the clamp is positioned securely about the pump cylinder and base and the lugs are received by the recesses, the bottom of the pump cylinder is urged firmly against the U-shaped gasket 42 to effect a fluid-tight seal between the pump cylinder, the outer shell 26, and the inner sleeve 28.
When the clamp is secured, the lugs are received in the respective recesses, and the pump cylinder and base are releasably secured against relative rotational movement. The shape of the lugs and recesses also facilitates urging the pump cylinder into sealing engagement with the U-shaped gasket 42. FIG. 7 illustrates the pump cylinder inserted in the base before the clamp is tightened. As the bolts 48 are tightened and the clamp halves 47a and 47b are drawn together, the contours of the coneshaped or bullet-shaped lugs and recesses provide a camming action which urges the pump cylinder downwardly in the direction of the arrow toward the gasket 42.
In one embodiment of the invention the sides of the recesses 54 and 55 form an included angle A of about 92 (see FIG. 8), the depth B of the recesses is about 0.136 inch and the bottom of the recesses are slightly rounded as at 56 with a radius of about 0.1094 inch. The lugs 45 and 46 are similarly shaped. The upper clamp portion 52 has a radius of about 1.125 inches, and the lower clamp portion 53 has a radius of about 1.187 inches.
Operation The fully assembled barrel pump is positioned in barrel 11 by inserting the suction tube 23 through the bung hole and engaging the threads 30 on the outer sleeve of the base with the threads of the bung hole. The pump may be rotated into the bung hole by exerting force on the spout 13 and the handle 15, and, since there are no threads at the junctures of the spout head 14 with the pump cylinder and the pump cylinder with the base, there is no danger that excessive force will damage the seals between these parts. The pump is rotated until 0- ring 38:: provides a fluid-tight seal between the barrel top and the base. If when the pump is fully tightened within the barrel the spout 13 does not extend inwardly from the bung hole over the barrel top, the clamp 47 may be loosened and the pump cylinder 18 may be totated or in either direction with respect to the base 22 so that the spout extends over the barrel top. The clamp may then be tightened, and the camming action of the clamp recesses against the lugs 45 and 46 ensures that the pump cylinder will be urged against the gasket 42.
In the particular embodiment illustrated the projections and recesses were spaced by 90. It has been found that this spacing allows the spout to be repositioned so that the container to be filled may be supported by the barrel top regardless of the original position of the spout after the pump is tightened within the barrel bung. It is to be understood, however, that more or less lugs and recesses spaced at smaller or larger intervals may be provided if a greater degree of adjustability is desired.
Referring to FIG. 9, when the various parts of the base need to be cleaned or replaced, they may be readily removed. The only permanently joined parts are outer shell 26 and outer sleeve 27, which may be spot welded. Even though O-ring 34, inner sleeve 28, and valve 40 are readily removed, the oil or other fluid being pumped from the barrel is confined by inner sleeve 28 to flow through the valve without seepage between the parts of the base. The clamp 47 forces the pump cylinder 18 against the gasket 42, and a fluid-tight seal is maintained between the pump cylinder, the outer shell 26 and the inner sleeve 28. The pump cylinder also urges the inner sleeve 28 downwardly against gasket 34 to maintain a fluid-tight seal between the inner sleeve and the flange 32 of the outer sleeve. Gasket 42 is compressed against both the top and bottom of valve seat 41 to prevent seepage around the valve. It is thus seen that not only does the lug means prevent relative rotation of the pump cylinder and base, but it ensures a positive seal between the various components of the base.
While in the foregoing specification, a detailed description of an embodiment of the invention was set forth for the purpose of explanation, it is to be understood that many of the details herein given may be varied considerably by those skilled in the art without departing from the spirit and scope of the invention.
1. In a barrel pump, a cylinder, a spout mounted on one end of said cylinder, a generally cylindrical base having an inside diameter slightly greater than the outside diameter of the cylinder, the other end of said cylinder being slidably received by said base, gasket means carried by said base and engaging said other cylinder end to provide a seal between the cylinder and base, lug means on said cylinder and base, and a clamp, said clamp coacting with said lug means for releasably securing said cylinder against rotational and sliding movement with respect to said base, a generally cup-shaped sleeve slidably reoeived by said base, the upper end of said sleeve flaring outwardly toward the wall of said base, said gasket means comprising an annular gasket supported by the flared portion of the sleeve, and second gasket means between the bottom of said sleeve and said base to provide a seal therebetween, said base being provided with an opening through the side thereof below the flared portion of the sleeve and an opening through the bottom thereof between the second gasket means and the side qr a; base.
2. In a barrel pump, a cylinder, a spout mounted on one end of said cylinder, a generally cylindrical base having an inside diameter slightly greater than the outside diameter of the cylinder, the other end of said cylinder being slidably received by said base, gasket means carried by said base and engaging said other cylinder end to provide a fluid-tight seal between the cylinder and base, a plurality of circumferentially spaced projections extending outwardly from said cylinder and a plurality of circumferentially spaced projections extending outwardly from said base, a clamp having a plurality of upper recesses to receive the projections on said cylinder and a plurality of lower recesses to receive the projections on said base, said projections and said recesses being generally cone-shaped to provide a camming action to urge said other end of the cylinder against said gasket means, said clamp coacting with said projections for releasably securing said cylinder in selected rotational positions with respect to said base.
3. In a barrel pump, a cylinder, a spout mounted on one end of said cylinder, a generally cylindrical base having an inside diameter slightly greater than the out side diameter of the cylinder, the other end of said cylinder being slidably received by said base, gasket means carried by said base and engaging said other cylinder end to provide a fluid-tight seal between the cylinder and base, a plurality of circumferentially spaced projections extending outwardly from said cylinder and a plurality of circumferentially spaced projections extending outwardly from said base, a clamp having a plurality of upper recesses to receive the projections on said cylinder and a plurality of lower recesses to receive the projections on said base, said projections and said recesses being generally cone-shaped to provide a camming action to urge said other end of the cylinder against said gasket means, said clamp coacting with said projections for releasably securing said cylinder in selected rotational positions with respect to said base, a generally cupshaped sleeve slidably received by said base, the upper end of said sleeve flaring outwardly toward the wall of said base, said gasket means comprising an annular gasket supported by the flared portion of the sleeve, and second gasket means between the bottom of said sleeve and said base to provide a seal therebetween, said base being provided with an opening through the side thereof below the flared portion of the sleeve and an opening through the bottom thereof between the second gasket means and the side of the base.
References Cited UNITED STATES PATENTS 1,899,917 2/1933 Perkins l03-216 X 2,687,910 8/1954 Petch et a1. 103216 X 2,853,974 9/1958 Hewitt 103216 X 1,471,085 10/1923 Wood 103-218 1,612,740 12/1926 Myers 103-218 2,344,005 3/ 1944 Sundholm 222-382 2,451,089 10/1948 Hunter 285-365 2,628,596 2/1953 Bachle 285367 2,773,709 12/1956 Smith 285367 WILLIAM L. FREEH, Primary Examiner US. Cl. X.R. 103l78; 222382; 285-365