Single dose, replaceable supply air pressure operated dispenser

Claim 2

A single dose replaceable product supply dispensing device comprising: a piston-cylinder means having a movable member and a fixed member having a compressed air flow path therethrough with an aperture at the end remote from said movable member; a single dose replaceable product dispensing member having a product dispensing aperture and adapted to be operatively connected to said fixed member and having a compressed air flow path therethrough, said flow path being operatively positioned relative to said compressed air flow path of said pistoncylinder means when said product dispensing member is connected to said fixed member for communication therebetween, said dispensing member further having a product supply chamber, and aspirating means in said compressed air flow path communicating with said product supply chamber for dispensing said product via said product dispensing aperture; and a diaphragm member normally blocking the compressed air flow path and adapted to open only when said movable member approaches thereto, during its compression stroke; whereby as said movable member moves toward said fixed member in a compression stroke, air is compressed in the fixed member, said diaphragm member remaining closed until said movable member substantially reaches the end of its compression stroke whereupon said diaphragm member opens, allowing compressed air to travel along said compressed air flow path into said product dispensing member and through said aspirating means, product being dispensed thereby.

Claim 3

In the dispensing device of claim 1, said diapHragm member being a solid breakable member and said device further comprising a perforating member positioned on and extending from said movable member toward said diaphragm member, the length of said perforating member being such that said diaphragm member is ruptured near the end of the compression stroke of said movable member.

Claim 4

The dispensing device of claim 2, wherein said product dispensing member has a peripheral recess about the compressed air flow path thereof, said diaphragm member being air tightly seated in said recess.

Claim 5

In the dispensing device of claim 3, said cylinder further having an aperture in the lateral surface thereof and said product dispensing member being insertable therethrough whereby said product dispensing member is operatively seated within said cylinder.

Claim 6

The device of claim 4, wherein said aspirating means is a Venturi nozzle insert member in said compressed air flow path and having lateral passages extending to said product containing chamber, said product being aspirated by said compressed air flow through said nozzle and being dispensed through said nozzle.

Claim 7

The device of claim 5, wherein said product dispensing member further comprises a thumb knockout pin extending from an end of said product dispensing member opposite said product dispensing aperture and said cylinder further having a second lateral aperture opposite said first lateral aperture, said pin extending through said second lateral aperture.

Claim 8

The device of claim 6, wherein said product dispensing member further comprises an annular cartridge member having a substantially cylindrical shape, and having opposite ends, one end thereof having an outer annular channel and an inner recessed portion, said compressed air flow path extending from said recessed portion to the lateral surface of said annular cartridge member, said Venturi nozzle insert being seated within said inner recessed portion, a cartridge cover having a central aperture and having an elongated portion positioned within said outer annular channel, said central passage being positioned in alignment with said Venturi nozzle and said cartridge cover, said Venturi nozzle insert and said cartridge member end forming said product supply chamber.

Claim 9

The device of claim 7, wherein said cartridge member further has a material filling passageway communicating with said product supply chamber and the opposite end of said cartridge member.

Claim 10

The device of claim 8, further comprising a first removable sealing member positioned over said Venturi nozzle for preventing contamination of the product contained therein and a second sealing member positioned over the opposite end of said member.

Claim 11

A single dose replaceable product dispensing member for dispensing a product by means of compressed air supplied by a dispensing device, comprising: a dispensing member body, one end thereof having an outer annular channel and an inner recessed portion, a first aperture within said inner recessed portion, a second aperture through which compressed air may be admitted to said dispensing member, a compressed air flow path between said first and second apertures, aspirating means comprised of a Venturi nozzle insert member having a central air passageway positioned within said inner recessed portion in operative alignment with said first aperture and receiving compressed air therefrom, said Venturi nozzle insert member further having lateral passageways extending from the central air passageway to the periphery of a cover member having a central aperture positioned over said one end of said dispensing member said central aperture being in alignment with said Venturi nozzle insert member, said cover member, said Venturi nozzle insert member and said dispensing member body defining a product supply chamber, said product supply chamber communicating with the central passageway of said nozzle insert member through said lateral passageways, and a material filling passageway intersecting said product supply chamber in said outer annular channel and intersecting an opposite end of said dispensing member whereby product may be supplied to said chamber and a diaphragm member normally blocking said compressed air flow path and adpated to open when the pressure of said compressed air supplied to said dispensing member exceeds a predetermined value whereby compressed air aspirates product as the compressed air passes through said Venturi nozzle member insert, product being thereby dispensed.

Claim 12

A single dose replaceable product dispensing member for dispensing a product by means of compressed air supplied by a dispensing device, comprising: a dispensing member body, one end thereof having an outer annular channel and an inner recessed portion, a first aperture within said inner recessed portion, a second aperture through which compressed air may be admitted to said dispensing member, a compressed air flow path between said first and second apertures, aspirating means comprised of a Venturi nozzle insert member having a central air passageway positioned within said inner recessed portion in operative alignment with said first aperture and receiving compressed air therefrom, said Venturi nozzle insert member further having lateral passageways extending from the central air passageway to the periphery of a cover member having a central aperture positioned over said one end of said dispensing member said central aperture being in alignment with said Venturi nozzle insert member, said cover member, said Venturi nozzle insert member and said dispensing member body defining a product supply chamber, said product supply chamber communicating with the central passageway of said nozzle insert member through said lateral passageways, and a material filling passageway intersecting said product supply chamber in said outer annular channel and intersecting an opposite end of said dispensing member whereby product may be supplied to said chamber and a diaphragm member normally blocking said compressed air flow path and adpated to open when the pressure of said compressed air supplied to said dispensing member exceeds a predetermined value whereby compressed air aspirates product as the compressed air passes through said Venturi nozzle member insert, product being thereby dispensed.