Abstract: The present invention relates to a multipurpose air fountain, and more particularly to an air fountain which can join with various blowpipes and accessory components to assemble an especial air tool for meeting different purposes--like a cleaning air gun, an inflating gun, a blasting dust gun and a painting spray gun. The present invention provides an air fountain that can connect with different length blowpipes, which can swivel to any orientation to improve the flexibility of the operation and to meet the necessaries of variety working places. The blowpipe can be replaced with an inflating adapter so that the air fountain works as an inflating gun for the tire. As attaching a spraying adapter, by a manifold with an extending hose, the air fountain can be refitted into a cleaning gun with a good absorbing effect. By means of the various attachments, the air fountain provided by the present invention can be refitted into a blast gun, an inflating gun, a cleaning gun or a painting gun.

Abstract: An inflating device having an air pressure generator for generating air flow and an air flow directing member connected to the air pressure generator. The air flow directing member has an inflating air flow nozzle extending therefrom and a surplus air flow exhaust enabling the exhausting of noninflating air to the atmosphere from the air pressure generator.

Abstract: A safety air gun that discourages tampering with safety vent holes comprises an internal air channel for delivering pressurized air to a work area. The internal air channel has an expansion chamber of increased cross-sectional area, with an outlet nozzle being positioned at one end of the chamber and an inlet tube extending into the chamber from an opposite end of the chamber. The inlet tube and outer nozzle have ends that are closely spaced across a gap. The expansion chamber also has side vent holes that both relieve dead end pressure and admit ambient air into the pressurized air stream. The gap spacing and outlet contour are such that the air force from the outlet is lower when the vent holes are blocked than when the two vent holes are open.

Abstract: A tip guard is provided to protect a user of an air-assisted airless paint spray gun from injury. The shape of the tip guard is designed such that use of the tip guard is not detrimental to the fluid spray pattern emitted from the tip of the air-assisted airless paint spray gun. Use of the tip guard does not affect the size or shape of the fluid spray pattern, nor cause accumulation of paint upon the tip guard. The tip guard has a base having a shoulder and an aperture adapted for engagement to the air cap and tip of an air-assisted airless paint spray gun. The base further has a pair of transition portions extending axially forward from said aperture, where notches formed in the transition portions are adapted to engage the forwardly-extending horns of the air cap of an air-assisted airless paint spray gun. Each transition portion further has a pair of vanes extending forwardly and radially outwardly from the transition portion, where each of said pair of vanes is then joined by a crossbar.

Abstract: A sound attenuating supersonic nozzle has an exit to throat ratio in the range of 2.5 to 6.0, with longitudinal grooves formed in the interior wall of the supersonic passageway of the nozzle body. A shield is disposed about the exterior surface of the nozzle body, forming an exit cavity and an exit opening, and has a gill cavity through which auxiliary air flows into the exit cavity and mixes with the supersonic flow.

Abstract: Cleaning, activating and metallizing of bore holes in conductor boards is performed by supplying a liquid treatment medium in form a standing wave onto a lower side of the conductor board by a surge line which is formed as a nozzle arranged under a transporting path and substantially normal to a transporting direction of the horizontally guided conductor board.

Abstract: A high pressure spraying gun has a jet pipe, a pressure water supply element, two trigger levers for right-handed and left-handed actuation, and only one blocking valve arranged to selectively block and to release pressure water through flow through the jet pipe or through the pressure water supply element and including a valve body, a spring which biases the valve body in a first direction, and a rocking member having two ends spaced from one another in a second transverse direction, so that the blocking valve can be opened only under the simultaneous action of two trigger levers on both ends of the rocking member.

Abstract: A tip guard is provided for protecting an airless spray tip and preventing accumulation of paint on the tip guard. The tip guard has two pair of vanes extending forwardly and radially outwardly from a base, each a pair of vanes being joined by a crossbar. A pointed edge faces radially inwardly from each of the vanes and the crossbar and, generally, planar sides are provided to each plane, thereby allowing air flow through the side of the tip guard and preventing buildup of paint on the surface of the tip guard.

Abstract: Method and apparatus for guarding a spray tip (36) of a spray gun (10). A tip guard (20) is suitable for being connected to the gun (10) and the tip guard (20) includes an axially extending portion (34) which defines a tip guard cavity (32). The tip guard cavity (32) is in fluid communication with the liquid carrying passageways within the gun (10). Tip guard cavity (32) also extends axially downstream of the orifice (38) of the spray tip (36) whereby if the axially extending portion (34) is dangerously shortened, the tip guard cavity (32) will be exposed to the atmosphere to relieve the pressure within the spray tip cavity (46) immediately adjacent to the upstream end of the spray tip orifice (38). The velocity pressure generated by the gun (10) is thereby reduced to a level which is substantially safe.

Abstract: An automatic safety system is built into a pneumatic motor actuated dispensing gun to prevent the gun from dispensing liquid material whenever the nozzle of the gun is loosened or removed from the gun body. The safety system comprises an air flow passage contained internally of the gun body for connecting the pneumatic motor to a normally sealed surface located between the nozzle and the gun body. Removal or loosening of the nozzle relative to the body, breaks this sealed surface and results in leakage of sufficient air pressure to atmosphere as to prevent actuation of the pneumatic motor and thus opening of the normally closed flow control valve of the gun.

Abstract: An air gun adapted to deliver a directed stream of high pressure air for cleaning and which is characterized by the ability to transmit the compressed air during normal operation with negligible loss of air pressure between that admitted and that released. The air gun includes a safety nozzle which comprises a flow tube, through which the pressurized air flows during normal operation, and a surrounding sleeve that extends outwardly beyond the outlet end of the flow tube and terminates closely adjacent thereto so as to serve to protect against blockage or stoppage of the outlet end. The sleeve also includes exhaust apertures closely adjacent the outlet end so that in the event the discharge end of the sleeve is blocked or obstructed, the pressurized air will be released through the exhaust apertures and the air pressure at the discharge end significantly reduced.

Abstract: An airless liquid spray nozzle is disclosed which has a safety guard extending therefrom in order to prevent the nozzle from coming into close proximity with the skin of a human operator, repairman, or the like. The conduit supplying liquid is valved by a normally closed valve responsive to air pressure or other control medium. The control medium supply communicates with a passage or path in the extending portion of the safety guard. Therefore, if the guard is not attached to the nozzle or becomes substantially broken, air leakage causes the supply of air to the valve to be reduced to such an extent that the valve stops hydraulic flow to the nozzle. In the preferred embodiment, the control medium, e.g. air, is supplied to the normally closed valve through a path or conduit which passes through the extending portion of the guard before reaching the valve.

Abstract: A fluid nozzle designed to shut off when the pressure of the fluid exiting the nozzle reaches a predetermined value, e.g., 30 psi, as set forth in OSHA regulations. The nozzle has a body having an inlet, an outlet, a passage therebetween, and a conventional valve for manually opening and closing the passage between the inlet and outlet. An apertured closure is inserted in the outlet and has a valve seat on its inner surface. A valve having a face on its one end and a passageway through the valve is positioned in the passage to slideably move between the valve seat of the apertured closure and a valve stop. A vent hole through the wall of the body is located between the conventional opening and closing valve and the valve stop.

Abstract: A dual purpose nozzle adapted to be attached to a blow gun or the like such that the blow gun can then be used for several functions; namely, to provide a high velocity jet of air for cleaning purposes and also to enable inflation of pneumatic tires or the like, thereby eliminating the need for repair shops to have to provide separate equipment for the two functions.

Abstract: Apparatus operable by actuating a trigger to cause high-pressure air from a compressor to jet out from the front end opening of a nozzle and to simultaneously produce an air curtain in the form of a conical air layer surrounding the air jet and spreading out from an annular fine clearance provided approximately at the base portion of the nozzle.

Abstract: A manually operated blow gun for cleaning work pieces by use of compressed air which includes a back pressure sensitive control that is effective when the gun is dead ended with the trigger depressed. The gun has a trigger operated valve which causes actuation of a main output valve, wherein when back pressure is increased, the pressure is directed via a by-pass conduit to close the main output valve against the action of the trigger operated valve.

Abstract: Secondary and tertiary air passages through the air nozzle surround the primary compressed air passage and induce a flow of low pressure air which surrounds the stream of compressed air to reduce the noise to acceptable levels. When the outlet end of the nozzle is blocked, flow through the tertiary air passages reverses to allow the compressed air to escape therethrough.

Abstract: A paint spray nozzle assembly for use with airless spray painting nozzles to protect against injection of sprayed paint through the skin of a user. The assembly includes a conically depressed nozzle cap with the nozzle opening at the bottom of the cone depression, the cone having a critical minimum depth. An additional assembly portion includes a projecting barrier extending outwardly beyond the nozzle preventing unintentional contact between the skin of the user and the fluid stream from the nozzle for a sufficient distance beyond the nozzle opening to prevent skin injection.

Abstract: A venturi nozzle for air guns includes an elongated, cylindrically shaped tube having a restricted orifice in a compressed air receiving end thereof through which compressed air is passed into a discharge end thereof. The air flow area of the discharge end of the tube is greater than the air flow area of the orifice to allow expansion of the air exiting the orifice in a region of the discharge end of the tube adjacent the orifice. Apertures formed through the tube in the discharge end thereof adjacent the orifice permit ambient air to be drawn by venturi effect into the tube and to be discharged with the expanded air out of the discharge end of the tube.

Abstract: An improved air nozzle is provided which produces high thrust amplification over a relatively wide range of input flow rates while maintaining relatively low noise levels. The nozzle is adapted to provide flow amplification by inducing flow of ambient air with high pressure air.

Abstract: An air nozzle is provided which produces high thrust with low noise. The nozzle is adapted to provide flow amplification by inducing flow of ambient air with high pressure air.

Abstract: A filter nozzle is provided for air guns, comprising, in combination, a filter housing, having an air channel therethrough and adapted to be mounted to an air outlet of an air gun, an air nozzle removably attached to the filter housing, in fluid flow connection with the air channel, for restricting and directing the air from the air gun as an air stream; and a filter removably attached to the filter housing across the air channel upstream of the nozzle so that air passing through the channel must pass through the filter before passing through the nozzle.

Abstract: A safety nozzle assembly for airless paint spray pistols including a guard member which extends downstream of the pistol and which receives the nozzle member in one end. The guard member has an increasing cross-section downstream of the nozzle accommodating a fan spray from the nozzle, the guard member having a generally flattened oval cross-section downstream of the nozzle and terminating in a discharge end which is arcuately curved along a radius generated adjacent the nozzle.