Aerosol device with telescoping container parts

Claim 2

An aerosol device, comprising airtight container means; an airtight flexible membrane in the container means containing fluid material under pressure and compressed gas gastightly separated from the fluid material; pressure means for manually increasing the pressure on the fluid material in the container means, the container means and pressure means comprising a pair of containers constituting an upper container and a lower container telescopically slidably mounted one within another, the upper container being mounted in the lower container, the lower container having a larger diameter for movement in axial directions, wherein dispensing pressure is maintained by gradually telescoping the upper and lower containers towards each other; and spray valve means in the container means for spraying the fluid material out of the container means under manual control.

Claim 3

An aerosol device as claimed in claim 1, wherein the spray valve means is in the upper container, said spray valve means opening at one end in the membrane and being airtightly sealed in the membrane and opening at the other end outside the container means in a manner whereby when the spray valve means is manually depressed it sprays the fluid material out of the container means and as the containers are moved toward each other in axial direction the pressure in the membrane increases.

Claim 4

An aerosol device as claimed in claim 1, wherein each of the containers of the container means and pressure means is of substantially hollow cylindrical configuration having a substantially cylindrical wall having an inner cylindrical surface and an outer cylindrical surface, substantially helical inner guide means for threadedly guiding the lower container on, around the outer surface of, and in axial directions of the upper container therewithin and substantially helical outer guide means for threadedly guiding the upper container in, around the inner surface of, and in axial directions of the lower container thereon whereby the containers are rotatable from a closed position in which the upper container is within the lower container having the larger diameter to an open position in which the containers are extended axially with the lowermost circumference of the upper container coupled to the uppermost circumference of the lower container.

Claim 5

An aerosol device as claimed in claim 3, wherein the container means and pressure means further comprise a pair of pressure sealing rings, and wherein the lower container has a first pressure sealing ring around its uppermost circumference on its inner surface and the upper container has a second pressure sealing ring around its lowermost circumference on its outer surface for providing an airtight coupling between the containers.

Claim 6

An aerosol device as claimed in claim 3, wherein the inner and outer guide means, respectively, of the container means and pressure means comprise a substantially helical groove formed in the inner surface of the lower container and a substantially helical protrusion formed on the outer surface of the upper container threadedly coupled to the helical groove of the lower container, the helical groove of the lower container being threadedly coupled to the helical protrusion of the upper container.

Claim 7

An aerosol device as claimed in claim 1, wherein the membrane covers the inside surfaces of the containers and constitutes a completely sealed chamber having the fluid material and the compressed gas therein under pressure in gastight separation from each other, said spray valve means opening in the fluid material in the chamber.

Claim 8

An aerosol device as claimed in claim 1, wherein the membrane covers the inside surfaces of the container and the compressed gas comprises compressed air, and further comprising an airtight and liquid tight partition sheet extending across the membrane and dividing the membrane into a first completely sealed chamber containing the compressed air and a second completely sealed chamber having the fluid material therein, said spray valve means opening in the second chamber.