US 2601767 A
Description (OCR text may contain errors)
July 1, 1952 T, P. WALL SELF+RIGHTING CUP Filed April 22, 1946 THOMAS P. WALL INVEN TOR.
ATTORNEY Patented July 1, 1952 UNITED STATES PATENT OFFICE SELF RIGHTING CUP Thomas P. Wall, Seattle, Wash.
Application April 22, 1946, Serial No. 663,879
4 Claims. 1
The present invention relates to a self-righting cup and, more particularly, to the combination of a, self-righting cup and a splash shield therefor.
In the past it has been a great source of annoyance to mothers with small children to have them spill their cups or glasses of milk, or other liquid, when placed on the table beside them. Applicant has constructed a device which will largely eliminate the spilling of milk in any quantity when a cup or glass is accidentally tipped over.
Having in mind these defects in the prior art it is an object of the present invention to construct a self-righting cup.
A further object of the present invention is the construction of a splash shield which may be readily inserted and removed from a cup opening to prevent large quantities of liquid spilling out of the cup when it is tipped over.
Yet another object of the present invention is the devising of a splash shield for a cup which can be readily inserted and removed by hand and without the use of tools or appliances.
Yet another object of the present invention is the construction of a splash shield for a cup which will allow the ready drinking of liquid from the cup, will return excess liquid to the cup when it is upright, and which will restrain the liquid from escaping from the cup when it is upset.
A device which will remedy many of the defects of the prior art and achieve the objects as set forth above, is shown in the accompanying drawings, in which:
Fig. 1 is a perspective view of a cup embodying the present invention;
Fig. 2 is a sectional elevational view with an enlarged corner of the cup as shown in Fig. 1.
Fig. 3 is a plan view of the device as shown in Figures 1 and 2.
The cup shown in the drawings has a conical body I, having on one side thereof a handle 2, and a bottom end closed by an outwardly convex portion 3. Inside of the cup, and spaced from the convex bottom 3, is a false bottom 4, which is sealed around its edges to the inside of the cup. In the space formed by the convex bottom 3 and the false bottom 4 there is placed a weighted mass, such as a mass of lead shot 5, which may be invested in some sort of a plastic mass to keep it from shifting about.
Adjacent the lip of the cup, and inside thereof, is an arcuate-sectioned internal annular groove 6. Seated in this groove by its peripheral edge is a splash shield 1. This splash shield l is dish shaped, concavo-convex, in form and thin in section, with a cylindrical edge portion 8 that fits in the annular groove 6. The splash shield l is inserted in the cup so that it is downwardly dished. The splash shield has formed in its center a small opening 9 for drainage of any liquid collecting in the depression. Along. the edge of the splash shield l is formed a drinking recess Ill, which allows the removal, of a small amount of liquid at a time from the cup when the shield is in place thereon. When liquid is flowing through the recess H], the opening 9 serves as an air vent.
The present device may be constructed of any suitable material, preferably one of the newer organic plastics, which gives an object that is translucent or clear, and light in weight, but which will stand much abuse in the way of droping or pounding. Sucha material will also give a splash guard that is resilient, will snap into place in the seating groove and may be easily removed therefrom.
In the operation of the present device, the splash shield 1 is orientated with the drinking recess to one side or the other of the cup, depending upon whether the user is right handed or left handed, and then pressed downwardly into the cup. The shield should be of such a size that it fits snugly and snaps firmly and securely into the groove. When properly constructed the shield will seat in the groove with two lines of contact around the cup, one at the bottom of the groove 6 and one at the top thereof. This makes a very secure seal between the cup and the shield so that if the cup is tipped over with a liquid therein there will be little chance of leakage by the edge thereof.
The splash guard may be removed by pressing down on one side thereof, preferably at the drinking recess I0. Pressing down on one side will cause the shield to tip, when it may be easily removed. The insertion and removal of the shield is facilitated by the body of the cup being conical. This means that the edge of the splash shield will easily pass the top edge of the groove 6 and will seat solidly against the lower edge thereof. Also the tapering of the cup prevents the splash shield from being pressed to the bottom thereof in a level position. When tipped on edge the shield may be forced to the bottom of the cup but otherwise it is very difficult.
Shot is placed in the bottom of the cu between the convex portion and the false bottom, and the false bottom is sealed in place by any convenient and well-known means. This weighted bottom will cause the cup to right itself even with a liquid therein when it is tipped over, the exact shape of the bottom and the amount of weight placed therein determining the righting force that will be exerted for maintaining the cup in an upri position. Generally, all that is needed is a cient righting moment to bring the cup back when it is brought part way over, as it is seldom that a cup is pushed all the way over and held down. It may be admitted that if the cup is tipped over so that the drinking recess I is at the bottom portion of the cup when tipped, that some liquid will spill out this drinking opening I0 but the quantity that will spill therefrom is small in comparison to that which would spill out if the shield were not in place.
Having thus described my invention, I claim:
1. A weighted self-righting conical cup having interior thereof, formed in the side wall thereof, and adjacent its lip an annular groove; and seated in said groove a splash shield having formed therein a small centrally situated opening and a marginally located drinking recess.
2. A weighted self-righting conical cup having an outwardly convex bottom, a false bottom, a weighted mass between said convex and false bottoms, an annular groove formed in the inside of the side wall of said cup and adjacent the lip thereof, and a splash shield adapted to form a closure for said cup, 'said shield being in the form of a concave-convex thin sheet disc having a rim adapted, to seat in said groove, and said shield having formed in its rim a notch so that when said shield is seated in said groove liquid may be removed from said cup through said notch.
3. A weighted self-righting conical cup having an outwardly convex bottom, a false bottom, a weighted mass between said convex and false bottoms, an annular groove arcuate in cross section formed in the inside of the side wall of said cup and adjacent the lip thereof, and a splash shield adapted to form a closure for said cup, said shield being in the form of a concavo-convex thin sheet disc, said shield having a cylindrical rim portion adapted to fit in said groove, and said shield having formed in said rim portion a notch so that when said shield is seated in said groove liquid may be removed from said cup through said notch.
4. The combination of a Weighted self-righting drinking cup having a convexly rounded exterior bottom, and an interior bottom, and a weighted mass between said exterior and interior bottoms, and a splash shield removably fitted to the rim portion of the cup and forming a closure for such cup, said splash shield being of concavo-convex form having its concave side facing upward and having a marginally located drinking opening, and in addition thereto an air vent opening located at the base of its concavity.
THOMAS P. WALL.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 225,785' Beattie Mar. 23, 1880 566,563 Derr Aug. 25, 1896 577,090 Wenzel Feb. 16, 1897 679,610 Eckert July 30, 1901 901,762 Wetzel Oct. 20, 1908 1,254,251 Magnus Jan. 22, 1918 2,012,113 Thompson Aug. 20, 1935 2,093,133 Low Sept. 14, 1937 2,358,600 Selten Sept. 19, 1944 2,414,697 Pettersson Jan. 21, 1947 2,437,784 Laskin Mar. 16, 1948 FOREIGN PATENTS Number Country Date 664,742 France Sept. 6, 1929