Abstract: A vortex ring generation device includes a casing having a gas passage and a discharge port, and an extrusion mechanism that extrudes a gas in the gas passage such that the gas in a vortex ring shape is discharged from the discharge port. V (m3) represents an extrusion volume, D (m) represents a diameter of the discharge port, L (m) represents a length of a cylinder having the diameter D and the volume V, and Re represents a Reynolds number of the discharged gas. 500?Re?3000 and 0.5?L/D?2.0.

Abstract: Systems and methods to provide a remote haptic and vibratory feedback stimulus to the body of a participant that may be remote from an actuator for the generation of vortex rings.

Abstract: A gun for producing a ring of fluid is described. The gun comprises a body defining a bore therethrough; a moveable member positioned at least partially within the bore; and a nozzle assembly coupled with the body and positioned at a bore opening. The nozzle assembly defines one or more fluid entrapment regions adjacent an opening of the nozzle assembly.

Abstract: An air propelling toy for directing a quantity of air in a desired direction includes a housing including a perimeter wall that defines an interior space of the housing. The housing has an outlet port that extends through the perimeter wall and is in fluid communication with the interior space. A diaphragm is coupled to the housing and positioned in the interior space of the housing and divides the interior space into an air space and a mechanism space. The air space is in fluid communication with the outlet port. An actuating assembly is operationally coupled to the housing and the diaphragm. The actuating assembly is actuated to draw the diaphragm into the mechanism space to draw air into the sir space through the outlet port and quickly release the diaphragm to force the air out of the air space and out the outlet port.

Abstract: The present invention is a toy launcher which is transfigurable from a compacted state to an operative state for launching projectiles. In one embodiment, the launcher utilizes a hand-pressurized air pump for providing the launching power, and may accommodate multiple types of projectiles to be loaded in the gun at the same time. Projectiles may include, for example, a bolo bullet, grapnel, or miniature missiles. Auxiliary retractable features such as targeting components and a flashlight with a logo projector may be added to enhance the play value of the invention.

Abstract: A device includes elements for controlling longitudinal kinetic energy of vehicles, and further elements for controlling inertia during driving in any direction, including one or more pipes (13) firing in the direction opposite to the running direction or in the direction of the centrifugal force, one shot or a controlled series of shots in a more or less quick succession, of compressed air or special blank charges.

Abstract: A toy air gun and in particular an improved air gun for generating vortex rings are described. The gun is designed so that the path along the axis of air motion from the rear of the gun to the air exit hole is optically transparent, and contains patterns normal to this axis that assist in accurate sighting. This allows targets to be directly sighted along the axis of air or vortex ring travel. Together with improvements to ensure purely axial air motion, this dramatically increases the aiming accuracy of this class of gun and makes it suitable for target-type activities. A screen with a cylindrically symmetric pattern of openings and aiming marks prevents solid objects placed inside the gun's barrel from being projected outwards, and assists in aiming the gun. An vented safety guard at the exit end of the gun prevents large pressures from developing in the event that the gun exit is blocked while preserving the vortex ring component to the airflow.

Abstract: A collapsible toy air gun with at least two tapered tubular sections adapted to be cooperatively joined coaxially, at least one supporting plate, a diaphragm and a resilient string. The tapered tubular sections are correspondingly sized concentrically to form a tubular body having a larger and an opposite smaller opening end in the extended operational position. At least one supporting plate is mounted on the circumferential surface of the tubular body to maintain the tubular sections in the extended position. The diaphragm is mounted transversely across the larger opening end of the tubular body with a pull knob and back support secured to the diaphragm. The resilient string is mounted across the smaller opening end of the tubular body through the back support.

Abstract: An improved paintball marker bolt and bolt head uses a curved gas inlet ramp and geometrically designed outlet holes to provide pressurized gas flow with decreased turbulence and more uniform distribution over the paintball surface. The improvements in gas flow and pressure distribution are combined with other mechanical improvements related to drive transfer, friction reduction, and bolt assembly, resulting in a significantly improved marker bolt. Improvements are realized in increased gas flow efficiency, increased paintball velocity (by 30 feet per second or more), increased range, improved shot consistency (less than a 2½% variation in shot-to-shot paintball velocity), decreased jamming, and decreased premature paintball breakage.

Abstract: In order to carry out a fire extinguishing operation by ejecting a fire extinguishing gas having cooling and oxygen deficiency functions and a high fire extinguishing capacity from a plurality of cylinders in succession, a repeating injector is provided with an ejection mechanism which has a magazine containing a plurality of cylinders filled with such a fire extinguishing gas and detachably fixed to a receiver barrel constituting an injector body, and which is adapted to break a seal member on a head portion of each of the cylinders by a triggering operation and eject the fire extinguishing gas, and a cylinder renewing mechanism for discharging a cylinder, which has been subjected to the ejection of the fire extinguishing gas and become empty, by knob-pulling operation, and renewing the cylinder successively.

Abstract: An archery practice/exercise device for use with a bow including a handleriser portion and a bow string. The practice/exercise device includes a cylinder having a closure member for partially closing a forward end of the cylinder so as to delimit an orifice through which air may be expelled from the cylinder. A piston is mounted for movement within the cylinder and an arrow-like shaft having a forward end is coupled to the piston and extends outwardly from a rear end of the cylinder. A fastening arrangement is disposed proximate to the rear end of the cylinder and secured thereto for enabling rigid attachment of the cylinder to the handleriser of the bow whereupon attachment to the handleriser, the cylinder extends forwardly of the handleriser for stabilizing the bow.

Abstract: This invention is a hand operated powder dispenser, and includes a case having a powder chamber, and a trigger activated mechanism that slides a ram rod through the chamber to move the powder out a dispensing opening.

Abstract: An archery practice/exercise device for use with a bow including a handleriser portion and a bow string. The practice/exercise device includes a cylinder having a closure member for partially closing a forward end of the cylinder so as to delimit an orifice through which air may be expelled from the cylinder. A piston is mounted for movement within the cylinder and an arrow-like shaft having a forward end is coupled to the piston and extends outwardly from a rear end of the cylinder. A fastening arrangement is disposed proximate to the rear end of the cylinder and secured thereto for enabling rigid attachment of the cylinder to the handleriser of the bow whereupon attachment to the handleriser, the cylinder extends forwardly of the handleriser for stabilizing the bow.

Abstract: An improved toy air gun is disclosed comprising a generally parabolic barrel having a muzzle opening at the truncated apex of the parabola. A handle and trigger mechanism are attached to the barrel exterior opposite the muzzle. A resilient diaphragm is mounted transversely of the barrel interior. Cocking means for grasping, stretching and locking the diaphragm rearwardly is provided on the gun. The trigger mechanism releases the diaphragm from the locked rearward stretched position to cause a puff of air to issue from the muzzle opening. A screen is mounted within the barrel between the muzzle opening and the diaphragm. An auxiliary cone is circumferentially attached by mounting ribs about the muzzle opening. The anterior end of the auxiliary cone has an opening of a diameter about equal to the muzzle opening. The auxiliary cone provides a circumferential opening around the muzzle having an area about equal to the area of the muzzle opening.