US2504371A - Hand-operated pressure oilcan - Google Patents

Description

April 1950 c. A. ANDERSON HANDOPERATED PRESSURE OIL-CAN Filed Sept. 27, 1946 A5Z0rney:

Patented Apr. 18, 1950 HAND-OPERATED PRESSURE OILCAN Chester A. Anderson, Litchfield, Minn., assignor of one-third to Alfred Anderson and one-third to Raymond N. Ornberg, both of Litchfield, Minn.

Application September 27, 1946, Serial No. 699,907

13 Claims.

This invention relates to hand oilers of that type which includes a pump which is actuated by the fingers to eject oil from the can.

The present invention is an improvement upon the structures disclosed and claimed in my prior Patents Number 2,169,209, issued August 15, 1939, and No. 2,299,450, issued October 20, 1942.

It is an object of the present invention to provide a hand Operated pressure oil can which is conveniently constructed of several parts providing a cylinder and piston unit, a spout shiftable with the piston and a finger pressure element supported in association with the spout whereby the entire assembly can be inserted in and re moved from the can proper as a unit.

Another object of the invention is to provide an improved piston or plunger unit having associated therewith a piston guiding portion and a spout supporting portion which latter portion includes means for advantageously securing and supporting the finger pressure element.

Another object of the invention is to provide a pressure oil can wherein the movable piston assembly and its cooperating parts are effectively sealed to prevent leakage from the can body and about the lower portion of the spout.

Still another object of the invention is to provide a pressure oil can unit including a spring pressed piston or plunger wherein adequate thrust receiving means is included to limit the spring induced movement of the piston assembly.

The above and other objects and advantages of the invention will more fully appear from the following description made in connection with the accompanying drawings, wherein like reference characters refer to the same parts throughout the views, and, in which:

Figure 1 is a view partially in side elevation and partially in vertical section of an embodiment of the invention;

Figure 2 is a section taken approximately on the line 2-2 of Figure 1 with the can body cap removed;

Figure 3 is a fragmentary vertical sectional view through another form of the invention; and

Figure 4 is a fragmentary vertical sectional view through still another form of the device.

In Figure 1 there is shown a can body 5 having an externally threaded mouth portion 6, the mouth opening being defined by a rolled edge 1.

Resting upon the rolled edge of the can mouth I is a gasket 8 and on top of the gasket is an annular flange 9 forming the upper portion of a cupshaped cylinder I0 having a closed bottom ll. The side wall of the cylinder H] is provided with apertures I! which provide liquid flow communi-- cation between the interior of the cylinder l6 and that of the can body 5.

A piston head I3 is located in the cylinder in said head having an outer flanged portion M and an inwardly concentric parallel flange l5 defining a central opening in said piston IS. A compression spring 16 has its lower end mounted about an upwardly pressed central portion I! of the lower end of the cylinder l0, and the upper end of the spring l6 bears against the horizontal under side portion of the piston |3 between the flanges I l and l5.

Threaded upon the threaded portion of the can mouth area is a centrally apertured cap l8, said aperture being defined by a downwardly turned flange IS. The cap I8 is provided with a downwardly facing concave portion 20 for a purpose to be described below.

A tapered spout 2| extends downwardly, through the aperture in the cap l8 and through the central aperture in the piston l3. A circumferential rib 22 near the bottom of the spout 2| limits downward movement of said spout through the apertured piston l3 and the extreme lower portion of said spout 2| is bent upon itself as at 23 to grip the inner concentric flange l5 of the piston I3. Consequently, the piston l3 and spout 2| are connected and held against relative axial movement.

It will be noted that the piston l3 has an outer diameter which is somewhat less than the inner diameter of the cylinder l0. Interposed between the outer flange M of the piston 13 and the inner cylinder side wal1 I0 is a cylindrical portion 24 of a combined piston guiding and spout supporting unit indicated generally at 25; The cylindrical portion 24 of the unit 25 closely fits on the piston l3 and has sliding engagement with the inner side wall of the cylinder 6. Above the cylindrical portion 24 is a reduced cylindrical portion 26 which is spaced some distance from the cylinder wall to receive a packing element 2'! a portion of which is closely fitted between said reduced cylindrical portion 25 and. the inner side wall of said cylinder [0. Another portion of the packing element 21, as is clearly shown, extends over a shoulder 28 formed bya further reduction of the diameter of the upper portion of the guiding and supporting unit 25. The upper and third cylindrical or tubular reduction 29 of the guiding and supporting element '25 closely engages a portion of the spout 2 l .as shown.

About the smallest reduced portion 28 of the unit 25 is a tubular element 29 which extends downwardly between the tubular or cylindrical section 28 of said member 25 and the downwardly turned flange l9 defining the opening in the cap '8. Thence the element 29 is bent outwardly and its outer edge is curved downwardly as at 30. The bent portion 30 is adapted to abut the portion 20 'of the under surface of the cap 3 to provide'athrust receiving member so that the downwardly turned flange I9 defining the central opening through the cap I8 will not be subjected to all of the thrust .exerted by the spring 16, and as a result wear of the above mentioned parts is practically limited. :It will be noted that the contact area-between'thercurved flange portion 30 on the bottom of the outer tubular element 29 is considerably greater than the downwardly turned edge of the :flange -l9.

It will also be seen that the upper portion of the packing element 21 which lies "about *the shoulder 28 on the guiding and supporting unit is clamped betweenisaidshoulder on said guiding and supporting unit and the curved flange portion 20 on the tubular element 29. If desired the outwardly turned lower portion of the tubular element 2-9 may :beprovided'with one '.or more downwardly :dimpled portions 29a shown in Figures'l an'di2'to more firmly grip the pack ing element '21.

Mounted on the upper'portions of the tubular sections28 and 29 is'a collar or flange 3| having 30 a central aperture defined by an upwardly turned "flange 32. The finger pressure element 3| rests upon the upper end of the outer tubular section 29,1and1the upper portion of the inner tubular section 28 is bent over upon the flange 32 as shown at 33 and against the upper-side of the finger :pressure element 3| to not only engage the flange 32 -but-also to :grip the finger pressure element 3| between said turned-over portion :and the upper end of the outer tubular element 29.

The device above described is so constructed that when assembled 'it provides anextremely sturdy, easily operated,.non-leaking pump unit for pressure oil cans. When the cap l8.is unscrewed from the'threaded portion'6 of the can mouth the entire pump unit :and:spout assembly can be'removed from the can and allofthe parts of the construction except the can proper .are kept together without having any of the parts become separated from others. At the same time, however,'the assembly of thedevice is relatively simple. The assembly requiresno securing devices such as soldering, welding .or bolts, but at the same time it is firmly held with its parts :in their proper positions relative to each other. "It is rather-clear from the disclosure in the drawing that when the finger-pressure element is pressed downwardly it will carry the spout 2l,.piston I-3 and piston guiding and spout supporting unit '25 as well asthepacking and the outer tubular element 29 downwardly relative to the can cap I8 and cylinder l0. .Oil can flow through the openings [.2 to the bottom .of the cylinder I'll-and when the .loweredgeof the outer flange. Won the ,piston l3 ,pa'ssesbelowsai'cl openings 12 in the cylinder wall on. in ..the llowerjportion .of the cylinder will be .forcibly "ejected through the spout f2l. Naturally, it the level of oil in the .can body .5 is "below the openings IZ the can.must be tilted so that oil will flow into the cylinder II).

In Figure 3 there .is shown another form of the invention-whichfincludes some of the parts shownanddescribed inconnection with Figure 1.

The can body and its threa'ded mouth por- T0 section 35 which is spaced inwardly from the inner wall of the cylinder l0 similar to the reduced cylindrical'section 26 shown in Figure 1. .A shoulder 36 similar to the shoulder 28 is formed by an inwardly extending portion 31 at "1-5 the topof the reduced cylindrical section 35 and a downwardly turned flange 38 at the inner edge I of the horizontal portion 31 defines a central opening. A packing element 39 has a portion lying between the reduced cylindrical section 35 and about the shoulder 36 as is clearly indicated. The cap IS-is provided'with an upwardly oflset portion I8ainto the under side 'of which is fitted a ring ill whichprovides an element having considerable contact area adapted to engage the under side-of the cap I3 to relieve the pressure and wear upon the flange IQ-which defines the central opening of said cap 18% described in connection with Figure 1. The ring 4|] overlies the inwardly turned portion of the packing element 39 and as in the case of the structure shown in Figure 1 provides withssaid packingelement a yielding thrust transmitting member adapted to contact the under side of the cap.

Extending upwardly through the central opening in the cap 8-is a tubular element 4| whose lower end 42 is shown bent about the downwardly turned flange 38 defining the opening in the upper portion of the composite element 34, 35, 31. A short distance above the bent-over lower 4 end 42 of the tubular-element 4! said tubular element is :enlarged to provide :a shoulder 43 which clamps 'thering' lll between said shoulder 33 and the turned-overlower end 62 of the tubular element 4|. The upper portion of the tubular 5 element 4| is reduced in thickness and offset to provide a shoulder M upon which rests a contrally 'apertured finger pressure element 45. That portion of the finger pressure element 45 defining its central opening isprovided with an up turned flange as over which the reduced upper end '41 of the tubular element M is bent, thereby clamping-the finger pressure element 45 between said over-turned upper end of the tubularelementdl and its shoulder M. At the same time the upper inner diameter of the reduced end 4'! of the tubular element 4! is such as to firmly engage the outer wall of the spout 2! so that it will be rigidly held in place.

In Figure 4 thereis shown "a third form of construction embodying the generalieatures of the invention shown in Figures 1 through 3. The can body 5-and-cap l8 are the same as in the other constructions, and the cylinder 10, the piston l3 and-spring l'fi arealso the same. The spout '2! extends through the can cap [8 in the same manner as above and it is clamped'to the inner-flange i5 'of the cylinder :0 in the same manner. There is the element with its cylindrical portion 34 lying between the outer piston flange I4 and the inside of the cylinder wall and vthe upward extension of the cylindrical member as is reduced as at 26in the other forms. Lying about a portion of the spout 2! and ex tending through'the opening in the can cap 58.

is a tapered sleeve 48whose lower end is 'bent about an inwardly concentric flange 49'lying parallel to the reduced cylindrical portion 26. A packing element 50 has a portion lying between the reduced cylindrical portion and the cylinder wall it and another portion thereof overlying the shoulder 5| at the upper end of the reduced cylindrical portion 25. A somewhat reversely curved packing retaining ring 52 overlies the horizontal portion of the packing element 50 and as is shown in Figure 4 the upper portion of the packing retainer ring 52 abuts a substantial area of the underside of the can cap !8 in a manner similar to the curved flange on the bottom of the outer tube or sleeve 29, as viewed in Figure 1. However, in Figure 4 the packing retainer ring and thrust absorbing member 52 is an entirely separate piece of material. It is held down against the packing by the downwardly turned portion H! of the cap it which defines the central opening in said cap.

The upper end of the tapered tubular element 48 has its upper end turned over as at 53 to engage an upwardly turned flange 54 on a centrally apertured finger pressure member 55. A shoulder 56 is formed at the bottom of the upwardly turned flange 54 on the finger pressure member 55 and an outer tapered sleeve 5'! extends through the aperture cap is to engage the inner edge of the packing retaining and thrust absorbing ring 52, and said sleeve extends upwardly to engage the shoulder 56 on the finger pressure element 55.

In the structures shown in the drawing it will be seen that I have provided an oil can having a reciprocating piston or plunger operated by a firmly fixed finger pressure element mounted on the spout or adjacent thereto and wherein efficient packing means and packing retaining means is provided, a portion of the packing retaining means being so positioned relative to the under side of the can cap that upward thrust of the compression spring is is made by a relatively broad surface contact by a packing retainer e1ement and the under side of the cap. This greatly reduces wear on the relatively movable parts which are urged together by the spring and increases the effective life of the device. The movable piston and bottom of the dispensing spout are assembled in a relatively simple yet permanently firm manner and each of the units thereof made up of several parts is held together so that the entire pump and spout unit with the finger pressure element and the can cap can be quickly and easily removed from the can for cleaning purposes, and all of said parts are interconnected so that they are retained as a unit, and can be just as easily inserted in the can and fastened to the can mouth by means of the cap. As stated above, all of the parts are interconnected without having to resort to the use of Welding, soldering or bolting or other connecting means other than the bending of one metal part upon the other or the clamping of one metal part between two others. The elements as in Figure 1 and all in Figures 3 and 4 which lie between the piston proper and the inner wall of the cylinder provide relatively long wearing guide means for the piston and spout while at the same time a highly efiicient type of packing is provided to prevent the escape of oil from the can body without imposing too much wear on the same. The device is easily operated with one hand and by reason of the structure shown and, claimed the parts will work easily and not become jammed.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the various parts without departing from the scope of my invention.

What I claim is:

1. In a pressure oil can, a can body having a mouth, a pump cylinder supported in said mouth and having its interior in flow communication with the interior of said can body, a piston movable in said cylinder, a spout connected to said piston and communicating with the interior of said cylinder, said spout extending upwardly through the mouth of said can body, a combined. piston guiding and spout supporting unit, a por-- tion of said guiding and supporting unit lying be-- tween said piston and the inner wall of said cylinder and in sliding contact with said wall, an other portion of said guiding and supporting unit being spaced inwardly from the inner wall of said cylinder, and a packing element interposed between said second mentioned portion of said, guiding and supporting unit and the inner wall. of said cylinder.

2. The structure in claim 1, and said guiding and supporting unit having an upwardly disposed.

shoulder, a portion of said packing element being disposed inwardly over said shoulder, an apertured cap lying about said spout and removably received on said mouth of said can body, and a thrust transmitting element interposed between the inwardly disposed portion of saidpacking element and the under side of said cap.

3. In a pressure oil can,'a can body having a mouth, a pump cylinder supported in said mouth and having its interiorin flow communication with the interior of said can body, a piston movable in said cylinder, a spout connected to saidpiston and communicating with the interior of said cylinder, said spout extending upwardly through the mouth of said can body, a combined piston guiding and spout supporting unit having lower and intermediate portions of different diameters, said lower portion being of greater diameter than said intermediate portion and ly-- ing between said piston and the inner wall of said cylinder in sliding contact with the latter, and a packing element located between the intermediate portion of said guiding and supporting unit and the inner wall of said cylinder.

4. The structure in claim 3, and an apertured cap through which said spout extends, said cap being removably secured in said can body andover the mouth thereof, and a portion of said packing element being interposed between a por-- tion of said guiding and supporting unit and said cap.

5. In a pressure oil can, a can body having a mouth, a piston and cylinder assembly supported in said mouth, a spout extending from said piston and cylinder assembly and through said mouth, said piston and cylinder assembly including a spring normally urging said piston toward said mouth, an apertured cap on said mouth and through which said spout extends, that portion of said cap defining said aperture having a downwardly turned edge positioned to contact said piston when urged upwardly by said spring, and the under side of said cap having a second piston contact area.

6. The structure in claim 5, and said second piston contact area of said cap being considerably greater than that of said downwardly turned edge defining the aperture in said cap.

'7. In a pressure oil can, a can body having a mouth, a cylinder supported in said can body, a piston unit movable in said cylinder, a spring normally urging said piston unit in one direction insaid cylinder, a spout extending outwardly from said piston, said piston unit having a pair of generally concentric, upwardly disposed tubular element's thereon, said spout being closely fitted in the inner of said tubular elements, the outer of said tubular elements being spaced outwardly'from the intermediate and upper portions of the inner tubular element, and an apertured finger pressure element, that portion of said finger pressure element defining its aperture being secured between the upper portions of said upward tubular elements and said piston unit.

8. The structure in claim 7, and the inner of said upward extensions having a greater height than the outer extension, said apertured finger pressure element fitting closely about said inner tubular extension and lying on the upper edge of said outer tubular extension, and the upper portion of said inner tubular extension being turned over upon the upper side of said finger pressure element to grip saidelement between said turned over portionof said inner extension and the upper edge of said outer extension.

9. a pressure oil can, a can body having mouth, a cylinder supported in said can body, a piston unit movable in said cylinder, a spout connected to said piston unit and extending outwardly from said cylinder and can mouth, said piston unitincluding an upwardly generally tubular element having an upper portion defining an aperture through which said spout extends, a second tubular element havingits lower end bent upon the aperture defin'in'g portion of the upper part of said first mentioned tubular piston unit element, "said second tubular element having an upwardly directed shoulder adjacent its upper end, an apertured finger pressure element lying about the upper portion or said "tubular element and resting on said shoulder, and a portion of said upper end of said "second tubular element being bent over an said aperture defining portion of said finger pressure element.

10. In a pressure oil can, a can body having a mouth, a cylinder supported in said can body, a piston unit movable in said cylinder, a spout connected to said piston unit and extending outwardly from said cylinder and can mouth, said piston unit including an upward generally tubular element having an upper end portion defining an aperture through which said spout extends, a second tubular element having its lower end bent upon the aperture-defining portion of the upper part of said first mentioned tubular piston unit element, said second tubular element being in contact with "said spout throughout substantially its entire length, a finger pressure element lying about the upper portion of said second tubular element, and said upper portion of said second tubular element being bent over upon said finger pressure element.

11. 'Il'iestrueture'inclaim 10,and a'third tubular element dying about said second tubular element, the lower portion of said third tubular 8 element resting upon said piston unit, and the upper end of said tliird tubular element being in contact with the underside of said finger pressure element.

12. In a pressure oil can, a can body having a mouth, a pump cylinder supported in said mouth and having its interior in flow communication with the interior of said can body, a piston movable in said cylinder, a spout connected to said piston and communicating with the interior of said cylinder, said spout extending upwardly through the mouth of said can body, a combined piston guiding and shout supporting unit, a portion of said guiding and supporting unit lying between said piston and the inner wall of said cylinder, another portion of said guiding and supporting unit extending upwardly through the mouth of said can body and engaging said spout above said can body, a finger pressure element mounted on said upwardly extending portion of said guiding and supporting unit, and said cylinder, piston, spout, piston guiding and supporting unit and finger pressure element being removable from said body as a unit.

13. In a pressure oil can, a can body having a mouth, a pump cylinder supported in said mouth and having its interior in flow communication with the interior of said can body, a piston movable in said cylinder, a spout connected to said piston and communicating with the interior of said cylinder, said spout extending upwardly through the mouth of said can body,'a combined piston guiding and spout supporting unit, a portion of said guiding and supporting unit lying between said piston and the inner wall of said cylinder, another portion of said guiding and supporting unit extending upwardly through the mouth of said can body and engaging said spout above said can body, an apertured cap removably secured on said can body mouth, said spout and a portion of said guiding and supporting unit extending through said cap and being vertically movable relative to said cap, a finger pressure element mounted on said upwardly extending portion of said guiding and supporting unit, a compression spring interposed between a portion of said cylinder and the underside of said piston to yieldably urge said piston, spout, and guiding and supporting unit upwardly, and said cap overlying a portion of said guiding and supporting unit to limit the spring urged upward movement of said cylinder, spout, and guiding and supporting unit.

CHESTER A. ANDERSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,489,172 Symons Apr. 1, 1924 1,830,295 Scott 1 Nov. 3, 1931 2,169,209 Anderson .'Aug. 15, 1939 2,299,450 Anderson Oct. 20, 1942

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