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Underwater device for generating or shooting a vortex ring

Patent Number: 8465375
Publication Date: 2013-06-18
Inventor:

An underwater device for generating a vortex ring includes a liquid chamber, and a fluid or air chamber contiguous to the liquid chamber and separated by a partition wall. The liquid chamber includes a generally rigid section and a compressible or flexible section. The rigid section includes an opening for selectively loading the liquid chamber with a liquid and for discharging a vortex ring ...

Combination for passing an object through a three dimensional true color image

Patent Number: 8460119
Publication Date: 2013-06-11
Inventors: ;

The combination of a truly realistic three dimensional real image in color and a second device to produce a repetitive passage of a solid object through the real image creates the illusion of one solid body passing through another. A simple method of accomplishing this is to mount a clock with a pendulum over or under the image and allow a pendulum end to pass periodically through the real image. Other means such as a device running on a circular track could accomplish the same illusory ...

Swing

Patent Number: 8454450
Publication Date: 2013-06-04
Inventor:

A swing includes a body including a concave central portion defining a recessed seat and a peripheral edge surrounding the concave central portion. The peripheral edge includes a plurality of tether openings, and each of the tether openings is adapted to receive a tether. The peripheral edge of the body is circular such that the body defines a circular disk. The seat includes a drain opening defined therein. The body can be defined as a one-piece molded polymeric construction or from ...