Fluid Dispensing Valve Device for Bubble Toy

The bubble-making device shown in U.S. Pat. No. 3,745,693 is a highly successful toy, but has been found to occasionally fail to produce bubbles, apparently due either to clogging of the fluid-dispensing aperture or to inadequate or incorrect flow of fluid through the aperture. The present invention describes a new type of fluid-dispensing device for this toy which has been found to solve the difficulty. According to the present invention, the fluid stream from the reservoir to the bubble-making unit is broken up by a valve device into a plurality of very fine streams tapering outwardly from a central aperture and then further diverted outwardly toward the walls of the multi-ported hollow bubble-forming stem so as to provide a flow of fluid to uniformly and continuously cover all of the interior wall surface with a film of the fluid, which appears to be essential to the proper formation of a continual stream of bubbles, which is the purpose of the device.

The specific nature of the invention, as well as other objects and advantages thereof, will clearly appear from a description of a preferred embodiment as shown in the accompanying drawing, in which:

FIG. 1 is a side elevational view of the bubble-making toy showing its component parts;

FIG. 2 is an enlarged longitudinal sectional view of an improved valve-containing cap unit for the device of FIG. 1;

FIG. 3 is a further enlarged sectional view of the improved valve unit; and

FIG. 4 is a sectional view taken on line 4--4 of FIG. 3.

As shown in FIG. 1 and also in U.S. Pat. No. 3,745,693, the bubble-making toy consists of a reservoir 2 for bubble-making fluid (which is a rather soapy liquid solution), a flexible cord 4 attached to the bottom of the reservoir and having a handle 6 by which it can be swung, e.g. around the user's head, so that under the action of centrifugal force and gravity the fluid in the reservoir flows through a restricted aperture 9 in screw cap 8 into the interior of multi-ported hollow stem 10 which has a number of preferably different-sized ports or apertures 12 which form the bubbles, as is well-known and fully described in said Patent.

The screw cap 8 has an internal thread 14 on its cylindrical side wall 16 cooperating with an external thread 18 on the neck 19 of reservoir 2 whereby the cap may be threadedly fastened to the reservoir, a unitary internal flange seal 20 of a well-known type is also preferably provided to effect a good seal at the rim of the reservoir neck. It will be understood that this fastening means is a preferred type, but other fastening and sealing means could be used. The top wall 22 of the cap is provided with the restricted orifice mentioned, which is in this case a valve unit comprising a tapered plug 24 fitting into a correspondingly shaped tapered orifice 26 (FIG. 3) in the top wall 22 and preferably retained in place by two flexible barbed hook members 28a and 28b which are dimensioned to engage circular rim 30 of the orifice member 9. A cylindrical neck 9a provides a cylindrical portion on the reservoir side of the orifice 9 of the same internal diameter as the smaller end of the tapered portion of the orifice, and the hooked ends of the barbs engage the circular rim 30 of this neck. Any other suitable means for retaining the plug 24 in place could also be used, but the present construction enables easy and inexpensive assembly of the plug as it need only be snapped into place and engages itself properly.

The cap 8 has a cylindrical portion 32 on the opposite side of wall 22 from the reservoir for engaging the cylindrical hollow stem 10 which is thereby fastened to the cap in any suitable way as by gluing or stapling, etc. On this opposite side of wall 22 a rim 34 is preferably provided corresponding to the larger tapered diameter of orifice 9, and plug 24 is preferably provided with a radially extending flange 36 which is slightly spaced from rim 34 so that fluid issuing from the orifice will be directed radially toward the inner wall of hollow stem 9 and be uniformly spread thereon, after which the fluid moves down toward the ports 12 under the action of gravity or centrifugal force when the device is swung on cord 4. FIG. 2 shows the plug 24 without the flange.

The tapered portion of plug 24 is provided with nodes preferably in the form of ridges 38 (FIG. 4) spaced apart to provide a series of grooved passages 40 whereby the fluid from reservoir 2 flowing through orifice 9 is broken up into a series of fine channels, and then directed outwardly through the annular space between rim 36 and flange 34 as described above. Alternatively, the tapered surface could be smooth and the grooves made on the outer tapered surface of the plug 24 to produce the same effect.