Black Decker Inc.

Berger, Jensen and Nicholson Limited

Berger, Jenson & Nicholson Limited

Sidney J Williams

John D Braithwaite

Derrick O King

James Prior

Apparatus for feeding a liquid to an applicator

An apparatus for applying liquid to a surface includes an outer vessel, an inner liquid container which is housed within the outer vessel and which is substantially closed but includes an inlet for pressurized gas and a separate outlet for liquid, and means for supplying pressurized gas to the container. An interface of the container and the outer vessel is sealed around the inlet for pressurized gas whereby in use a region of the space between the outer vessel and the inner container is not pressurized. The unpressurized region of the outer vessel is vented. An applicator is connected via a length of flexible tube to the liquid outlet.

Apparatus for applying liquid to a surface having safety vent

Cartridge assembly

A liquid container containing liquid, such as paint, to be applied to a surface includes a radially inwardly facing sealing wall on the top of the container extending in a complete circle around the center of the container. An aperture is provided in the top of the container inside the sealing wall. The sealing wall has a depth of at least 4 mm and there is a free space projecting at least 4 mm radially inwardly of the sealing wall and extending in a complete circle around the inside of the sealing wall. In use the container is housed in an outer vessel, a conduit passes through the outer vessel and the top of the container to the bottom of the container, and a pressurizing assembly is provided for applying pressure inside the container. The outer vessel includes a circular seal member mounted on a radially outwardly facing wall extending downwardly from the top of the vessel and cooperating with the sealing wall on the liquid container.

Paint applicator and container

A portable apparatus for feeding liquid under pressure to an applicator, comprises a vessel having a pressurizing assembly associated therewith, the assembly having a housing for receiving a capsule of pressurized gas and having pressure reducing means. A first fluid path extends from the high pressure side of the pressure reducing means and communicates with the outlet of the capsule inserted, in use, in the housing. The vessel has defined therein a first chamber and a second chamber, the second chamber containing, in use, the liquid to be fed to the applicator. A diaphragm is disposed between the first and second chambers. A second fluid path extends from the low pressure side of the pressure reducing means and communicates with the second chamber. Gas is allowed to flow through the diaphragm between the first and second chambers to equalize the pressure in said chambers; but flow of liquid is inhibited from the second chamber to the first chamber whereby the liquid is inhibited from reaching other parts of the apparatus. Preferably this is accomplished by having a small hole or a slit in the diaphragm. A feed conduit is connected to the vessel and communicates with the second chamber for transferring liquid from the second chamber to the applicator. The second chamber may be defined by a liquid container received within the vessel.

A pressure regulator and safety valve assembly comprises pressure regulating means and safety valve means. The pressure regulating means is so coupled to the safety valve means that the pressure at which the safety valve means opens varies independence upon the setting of the pressure regulating means. The safety valve means includes a safety valve member mounted for movement relative to a static surface between a closed position in which the safety valve member seals against the static surface and an open position in which the safety valve member is spaced from the static surface.

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Surrey, United Kingdom

Sidney J Williams