Abstract: A spray apparatus and method is disclosed for spraying heavy viscous material. The apparatus includes a pressure tank containing a supply of the material. Pressurized air is supplied to the upper end of the tank for forcing the material down through an outlet port at the tank's lower end and into a supply hose leading to a spray gun. A follower plate floating on the upper surface of the material carries a stopper cone which is aligned with the outlet port. As the material level nears the lower end of the tank, the follower plate moves the stopper cone against the outlet port to immediately and positively shut material flow off. A cleaning tool is provided and includes an air valve in combination with a sponge adapted for fitting into the hose. The sponge is pushed by air pressure through the hose for a first cleaning pass, and the air flow is controlled by a hand-operated air valve.

Abstract: To avoid the use of propellants which are harmful to the environment, a spraying apparatus employs a supply chamber which contains a material to be sprayed and includes a pressure chamber of variable volume. This pressure chamber of variable volume is connected to actuating structure which is provided for increasing the volume of the pressure chamber and thus for sucking material from the supply chamber into the pressure chamber. Since the material within the pressure chamber is kept under pressure by pressurizing structure, a nonreturn valve is disposed in the suction conduit leading to the supply chamber. Material can be sprayed with the aid of the spraying apparatus without any harmful effects on the environment, the use of conventional spraying heads being here possible.

Abstract: A volume controllable applicator is disclosed in the form of a self-contained spot gun for the application of pesticides and the like. The applicator includes an elongate applicator tube where terminates forwardly in a spray nozzle and rearwardly in a connection to a piston within a cylinder. A housing overfits a rearward portion of the applicator tube and the applicator tube is reciprocal relative to the housing by employing a pivotal, operating handle. An adjustable stop is affixed to the applicator tube forwardly of the housing to precisely limit and control the length of movement of the applicator tube relative to the housing in a manner to precisely control the volume of the effluent as it is pumped by the piston. A first one-way valve is connected to the cylinder inlet to admit the liquid chemical into the cylinder upon movement of the operating handle toward its suction position.

Abstract: A dispenser for two distinct fluids includes a container having a chamber for each of the fluids. The fluid chambers communicate with a mixing chamber at the top of the container leading to a dispensing spout. Mixing ports in the wall of the mixing chamber permit the fluids to mix before being dispensed from the container.

Abstract: A hose end nozzle assembly with a handle, a body with an internal mixing chamber, and a nozzle discharging from the mixing chamber. A dispenser opens into the mixing chamber. It includes a piston-cylinder assembly by means of which liquid held in the dispenser can be ejected into the mixing chamber.

Abstract: An economical and easy to operate mechanically operated dispensing device has a rotatable actuator connected with at least one expansible chamber to effect operation of the expansible chamber to draw material to be dispensed from a container into the expansible chamber and to then pressurize the material. An expansible bulb is connected with the expansible chamber and with a dispensing nozzle, and has a volumetric capacity several times as great as the expansible chamber. Valves are associated with the bulb to control flow into and out of the bulb, whereby the rotatable actuator and expansible chamber are operative to repeatedly draw material from the container, pressurize it and transfer it under pressure into the bulb, the bulb expanding as material is added thereto, and the elasticity of the bulb being such as to exert a substantial pressure on the material in the bulb.

Abstract: A pump type dispenser for dispensing a spray of liquid has a container for containing the liquid to be dispensed, a piston-cylinder device for drawing liquid out of the container and pressurizing it, a dispensing head into which the pressurized liquid is pumped, with a free piston chamber therein in which is a free piston spring loaded toward the direction from which the pressurized liquid comes, and a nozzle opening out of the free piston chamber through the dispensing head. A check valve between the piston-cylinder device and the free piston chamber blocks return of the fluid once it has been forced into the free piston chamber, so that the free piston acts on the liquid in the free piston chamber to dispense it in a spray through the nozzle while the piston-cylinder device recovers from its actuated to its unactuated position and the next actuation thereof is started.

Abstract: An ink supply system for an ink printer having a pressurizable, interchangeable ink cartridge, means for pressuring the ink cartridge upon insertion into the ink cartridge receptacle, and means for establishing fluid communication between the interior of the ink cartridge and the ink supply line to the ink jet printer before pressurization of the ink cartridge occurs. The present ink supply system also includes an improved septum and needle method of establishing fluid communication.