Dispenser unit for viscous substances

A dispenser unit for viscous substances comprising in combination:

• a dispenser having a housing including an open, annular receptacle, a valved passage formed in said housing having opposed ends, one end open to the atmosphere and the opposite end open to said receptacle, and including further a member movable relative to said passage to effect a vacuum within said passage opposite end;
• and
• an annular hollow cartridge open at opposite first and second ends and having a wall at midpoint the length of said cartridge and forming a first and a second chamber within said cartridge on opposite sides of said wall, said wall having a first surface facing into said first chamber and a second, opposite surface facing into said second chamber, said wall having an axial opening formed therein and fluidly communicating said chambers, and having further a transverse port formed therethrough, the outer ends of said port opening to the atmosphere and the inner ends of said port fluidly communicating with said opening, a first annular piston sealingly and reciprocally mounted within said first chamber, and a second piston sealingly and reciprocally mounted within said second chamber,
• said cartridge first end sealingly connected to said receptacle with said first piston adjacent said wall first surface, a cap removably sealing said cartridge second end, with said second piston adjacent said wall second surface, said first chamber fillable with a viscous substance between said first piston and said first end, said second chamber fillable with a viscous substance between said second piston and said second end,
• said cartridge first end removable from said receptacle, said cap removed from said second end, and said second end sealingly connected with said receptacle, said cap optionally sealingly connected to said first end.

For use with a dispenser having a housing including an open, annular receptacle, a valved passage formed in said housing having opposed ends, one end open to the atmosphere and the opposite end open to said receptacle, and including further a member movable relative to said passage to effect a vacuum within said passage opposite end:

• an annular hollow cartridge open at opposite first and second ends and having a wall at midpoint the length of said cartridge and forming a first and a second chamber within said cartridge on opposite sides of said wall, said wall having a first surface facing into said first chamber and a second, opposite surface facing into said second chamber, said wall having an axial opening formed therein and fluidly communicating said chambers, and having further a transverse port formed therethrough, the outer ends of said port opening to the atmosphere and the inner ends of said port fluidly communicating with said opening, a first annular piston sealingly and reciprocally mounted within said first chamber, and a second piston sealingly and reciprocally mounted within said second chamber,
• said cartridge first end sealingly connected to said receptacle with said first piston adjacent said wall first surface, a cap removably sealing said cartridge second end, with said second piston adjacent said wall second surface, said first chamber fillable with a viscous substance between said first piston and said first end, said second chamber fillable with a viscous substance between said second piston and said second end,
• said cartridge first end removable from said receptacle, said cap removed from said second end, and said second end sealingly connected with said receptacle, said cap optionally sealingly connected to said first end.

For use with a viscous substance dispenser having an annular, open receptacle;

• an annular hollow cartridge open at opposite first and second ends and having a wall at midpoint the length of said cartridge and forming a first and a second chamber within said cartridge on opposite sides of said wall, said wall having a first surface facing into said first chamber and a second, opposite surface facing into said second chamber, said wall having an axial opening formed therein and fluidly communicating said chambers, and having further a transverse port formed therethrough, the outer ends of said port opening to the atmosphere and the inner ends of said port fluidly communicating with said opening, a first annular piston sealingly and reciprocally mounted within said first chamber, and a second piston sealingly and reciprocally mounted within said second chamber,
• said cartridge first end sealingly connected to said receptacle with said first piston adjacent said wall first surface, a cap removably sealing said cartridge second end, with said second piston adjacent said wall second surface, said first chamber fillable with a viscous substance between said first piston and said first end, said second chamber fillable with a viscous substance between said second piston and said second end,
• said cartridge first end removable from said receptacle, said cap removed from said second end, and said second end sealingly connected with said receptacle, said cap optionally sealingly connected to said first end.