US2581897A

US2581897A - Gravity operated closure with means to form an opening in a container

Info

Publication number: US2581897A
Application number: US74767A
Authority: US
Inventors: Hugh C Allen
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-02-05
Filing date: 1949-02-05
Publication date: 1952-01-08
Anticipated expiration: 1969-01-08

Description

1952 H. c. ALLEN GRAVITY OPERATED CLOSURE WITH MEANS TO FORMAN OPENING IN A CONTAINER Filed Feb. 1949 llllllllllllllL l l l llllllllll.

Patented Jan. 8, 1952 omcE GRAVITY OPERATED CLOSURE WITH -MEANS TO .FORM AN OPENING IN A CONT lNE-R.

Hugh 0. Allen, Astoria. N. .Y.

. Applica ion February 5, 194.9, Serial No, 6'1

'5 Claims. 1 t

The present invention pertains to improvements in automatic closures.

An object of the invention is to provide an improved pouring valve combination for use with receptacles such as bottles and cans, the valve being adapted to open as the receptacle is tipped for pouring and to close when the receptacle is returned to upright position.

Another object is to provide a combination of the above nature, including an adapting seat member or body which permits its use with bottles of differing neck sizes and which renders proper operation independent of irregularities in the mouths of the bottles.

Another object is to provide a combination of the above type adapted to avoid tendencies toward sticking when used with fluids such as milk.

A further object is to provide a bottle closure of the above nature which is particularly adapted to simple manufacture from plastic materials, of a resilient nature if desired.

Another object is to provide an embodiment of the invention which may be made of metal and in which the body member is adapted to be driven into the top of receptacles such as condensed lowing description in connection with the accompanying drawings, in which Figure 1 is a vertical partly cross-sectional view of a form of the device for use with bottles; Figure 2 is a horizontal sectional view of the same in the plane 22, Figure 1; V v Figure 3 illustrates, an alternative form ofsea ring or body;

Y Figure 4 is a verticalpartly cross-sectional view of a metal embodiment for usewith cans and, the

v like;

f Figure 5 is in arearelevation of the same, and

v v Figure 6 is a bottom view of the valve member, Figures 4 and 5.

Referring to Figures 1 and 2, the numeral l0 generally designates a seat member or body having a tapered lower portion ll adapted to. be wedged into the mouth of a bottle, herein illusra e s a milk ottle L The upper portion '3 o the body l is sup-shar d. 'I'heGyI l lower'inner surface i4 meets the bottom inner angle, thus forming an upwardly extending angular valve seat l5 surrounded by a circular depression or groove IS.

A valve head H, which may be of comparatively heavy construction, has a spherical lower seating surface l8 adapted to engage the angular valve seat I5 in substantially line contact. Guideflns [9, extending downward from the valve-head l'I, form a loose sliding fit in the cylindrical interior l4.' The fins l9 extend beyond the lower end of the member Ill, and are fitted with a retainer ring 20, preferably of the snap-ring type.

While the bottle [2 stands upright the valve I! normally remains seated by gravity on the seat l5. When the bottle is tipped for pouring, the rush of fluid into and through the cylindrical interior of the member I0 pushes the valve outward, guided by the fins 19, allowing the fluid to be poured from the cupped upper portion [3 as desired. The retainer ring 20 prevents the valve structure from escaping from the member [0 in case the bottle is tipped at a sharp angle or inverted.

When the bottle [2 is returned to upright position the valve drops into closed position, the fins l9 guiding the spherical surface 18 into engagement with the angular seat I5. The provision of the cylindrical surface l8 ensures accurate seating at all times, allowing the fins 19 to have sufficient play for free operation even with highly viscous fluid, while at the same time preventing any tendency toward cocking. Similarly, the substantially line contact on the seat l5 causes the heavy head I i to exert a comparatively heavy unit seating pressure, ensuring a tight seal. The outward and downward slope from the valve seat IE to the groove l6 drains away any residual fluid from the seat, a purpose of this arrangement being to prevent such residue from accumulating in and directly about the contact circle. This provision is of great importance in dealing with fluids such as milk, which if not efiectively drained away at once from the seat, may congeal in the joint in suffcient quantity to hold the valve from subsequent automatic opening. The acute angular contour of the seat l5 I 3 capes down the outside of the device, draining away from the angular seat Hi to clear the latter in the manner previously described.

The taper of the lower body portion ll makes each size of the device adaptable to bottles with considerable variation in neck diameters, while the accurate valve and seat combination provides proper operation at all times without any dependence on direct cooperation between a valve and the mouth of the bottle itself.

The forms of the device shown in Figures 1,' 2 and 3 may be advantageously. made of plastic materials, both the seat member -I and the valve valve structure, and being integral with the shell, cannot work loose or be dislodged. At the same time the slot 30 allows the last of the fluid to have access to the valve opening as the can is emptied. The advantages of the structure in simplicity and cheapness of manufacture will be obvious to those skilled in the art.

One or more additional holes 35 may be provided lower down along the shell 2| to further free the flow as the fluid runs low in the can.

- When the can 33 is again placed upright the valve head 2] falls into place on the seat 25 and r V the residual fluiddrains away from the raised head I! with its integral fins l9 being made of the same type plastic or of different'types if desired. For example, for bottles having some deits operat on as a pouring guide, also forms a gree of irregularity in the inside ofthe necks, or.

for fragile bottles in which his desirable to limit the wedging pressure in installing the device, a

certain amount of resilience in the member ID is advantageous. For this purpose the member in may be made of a plastic such as polyethylene, the guide fins I9 being given suflicient clearance to move freely when the tapered portion II is slightly contracted.

The form of the invention shown in Figures 4, 5 and 6 has a slightly tapered sheet metal shell 25 which is cut off diagonally at 22 to form a piercing point 23. The upper cupped portion 24 is formed with an upwardly extending angular .seat 25 of the general shape and for the purpose previously described. The seat 25 receives the spherical surface 26 of a valve 21 which may also be advantageously made of metal to provide weight. Two U-shaped stirrups of

wire

28 and 29 are secured in the bottom of the head 21 in crossed relation as shown in Figure 6, forming guides which extend downward in the shell 2|. The stirrups obviously may be welded or otherwise secured together at their crossing point to provide stiifness. A narrow vertical slot 36 is formed in the shell 2|, the metal displaced therefrom being bent inward after the valve assembly has been installed, thus forming a retaining tab 3| extending across within the

stirrups

28 and 29 as shown in Figure 4.

' The upper cupped portion 24 may be formed with a spout 32 to facilitate pouring.

When it is desired to install the device, for example, in a condensed milk can 33, the point 23 is placed near the rim of the can top with the inclined rear side 22 directed inwardly, and the device'is driven downward into the can. The point 23 and inclined side 22 cut a hole in the can top, laying the cut-away metal inward in a flap 34. The upper portion of the tapered shell 2! enlarges the hole in true circular shape and wedges therein to form a tight joint.

As the can is tipped, the fluid pushes the valve head 27 outward to allow pouring as previously described. The stirrups 28, as in the case of the fins [9, Figure 1, act as linear guides to .direct the valve head outward to clear the seat for unobstructed pouring. However, the slightly loose fits of the guide members in both types permit the heavy valve heads a, slight initial lateral movement from their seats as the receptacles are tipped, thus freeing the valves for easy;opening by the fluid. V

The use of the thin wire stirrup guides 28 in V the metal type is of particular value in allowing free flow in small sizes of the device.

itself forms an effective limiting retainer for the angular seat to;clear the latter in the manner previously set forth.

The. enlarged upper portion 24, in addition to convenient prying head for ,dislodging the device from an'empty receptacle. The same,"of course, applies tothe upper cupped portion l3, Figure 1. 7 While the invention has been described in preferred form, it is not limited to the exact structures illustrated, as various changes and modifications may be made without departing from the scope of the appended claims.

What is claimed is:

1. In a closure device for receptacles such as cans and the like, in combination, a tubular metal body member adapted to be driven into the top of a receptaclaa pouring cup on the top of said body member of greater diameter than said body member, a valve seat on said body member at the juncture of said member and said cup, a valve head normally engaging said seat in substantially line contact and adapted to be moved away from said seat by outrush of liquid when said receptacle is tipped for pouring, guide means depending from said head in cooperative guiding relation with the interior of said tubular body member, and means within said body member to limit the movement of said valve and guiding means, the bottom of said cup having a depression encircling said seat, whereby residual liquid may be drained from said seating contact'line. l

2. In a closure device, in combination, a hollow body member adapted to engage a top opening of a liquid container in sealing relationship, said 'body member comprising a, conical receptacleengaging lower portion and a cupped upper pouring portion of enlarged diameter, an upwardly extending sharp valve seat on said member, a check valve normally engaging said seat in substantially line contact and adapted to be moved away from said seat by outrush of liquid when said receptacle is tipped for pouring, substantially rectilinear guide means including a plurality of slender spaced members slidable in said.

body member and adapted to control the opening and re-closing motion of said valve, and means to limit the extent of said opening motion, said seat having a downwardly sloping outer profile whereby residual fiuidmay drain away from said contact line, and the bottom of said cupped portion having an annular groove surrounding said seat'to receive said'drained residual liquid.

3. In a closure for receptacles such as cans} in combination, a hollow metal body having an upper valve seat and a conical lower portion adapted to be driven into the top of areceptac'le, said conical lower portion being diagonally truncated to form a piercing point and an inclined cutting face, a valve head having a spherical surface normally engaging said valve seat in substantially line contact, said head being adapted to be moved away from said seat by rush ofifluid when said receptacle is tipped for pouring, guide means secured to said head and extending within said lower portion in sliding relation, means to limit the opening motion of said head and guide means, and a cupped upper pouring portion on said body having a depression in the bottom thereof encircling said valve seat, whereby residual fluid may be drained from said seating contact line.

4. In a closure for receptacles such as cans, in combination, a hollow metal body having an upper valve seat and a conical lower portion adapted to be driven into the top of a receptacle, said conical lower portion being diagonally truncated to form a piercing point and an inclined cutting face, a valve head having a spherical surface normally engaging said valve seat in substantially line contact, said head being adapted to be moved away from said seat by rush of fluid when said receptacle is tipped for pouring, guide means comprising substantially U-shaped stirrups secured to said head and extending within said lower portion in sliding relation, and means to limit the opening motion of said head and guide means comprising an integral tab struck inward from a wall-of said body and extending within said stirrups, the displacement of said tab from said wall forming a passage for liquid into said body.

5. In a closure for receptacles such as cans and the like, in combination, a tubular metal body member adapted to be driven into the top of a receptacle, a pouring cup on the top of said body member of greater diameter than said body member, a, valve seat on said member at the juncture of said member and said cup, a valve head normally engaging said seat in substantially line contact and adapted to be moved away from said seat by outrush of liquid when said receptacle is tipped for pouring, guide means depending from said head in cooperative guiding relation with the interior of said tubular body mem- 5 her, and means comprising a tab struck inwardly from a wall of said tubular member and adapted to intercept said guiding means for limiting the movement of said valve and guiding means, the displacement of said tab from said wall forming an entry opening for liquid through said wall, the bottom of said pouring cup having a, depression encircling said seat, whereby residual liquid may be drained from said seating contact line. HUGH C. ALLEN.

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

20 UNITED STATES PATENTS Number Name Date 32,647 Preston June 25, 1861 40,251 Draper Oct. 13, 1863 952,683 Natt Mar. 22, 1910 25 974,444 Stauffiger Nov. 1, 1910 985,955 Van Riper Mar. '7, 1911 1,048,226 Stone Dec. 24, 1912 1,265,607 Carlisle May '7, 1918 1,611,294 Von Ende Dec. 21, 1926 30 1,716,802 Stevenson June 11, 1929 1,776,395 Rundell Sept. 23, 1930 2,181,335 Martin Nov. 28, 1939 FOREIGN PATENTS Number Country Date 5,129 Great Britain Mar. 11, 1905 340,386 Italy May 13, 1936