Additive dispensing apparatus

An additive dispensing apparatus for a fluid system comprising

• a) a head having a body portion adapted and configured for fluid communication with the fluid system and having a first flow path extending therethrough;
• b) a fluid inlet portion of said first flow path defining a relatively high pressure region and a fluid outlet portion of said first flow path defining at least in part a relatively low pressure region;
• c) a canister operatively associated with said body portion and having an interior region;
• d) a second flow path providing fluid communication between said inlet portion of said first flow path and said interior region of said canister;
• e) a collapsible container disposed within said interior region of said canister and having an interior region for containing liquid additive for dispensement into the fluid system;
• and
• f) a feed tube providing fluid communication between said collapsible container and said fluid outlet portion, whereby the pressure differential between said interior region of said canister and said interior region of said collapsible container effectuates proportional dispensement of liquid additive into the fluid system.

A fluid system comprising:

• a) at least one conduit for transmitting fluid;
• b) an additive dispensing apparatus including:
• i) a body portion adapted and configured for fluid communication with said fluid system and having a flow path extending therethrough, said flow path including a fluid inlet portion defining a relatively high pressure region and a fluid outlet portion defining at least in part a relatively low pressure region;
• ii) a canister operatively associated with said body portion and having an interior region;
• iii) a first fluid passageway providing fluid communication between said fluid inlet portion and said interior region of said canister;
• iv) a collapsible container disposed within said interior region of said canister and having an interior region for containing liquid additive for dispensement into the fluid system;
• and
• v) at least one elongated feed tube providing fluid communication between said interior region of said collapsible container and said fluid outlet portion;
• c) a manifold providing fluid communication between said at least one conduit and said fluid inlet portion and between said fluid outlet portion and said at least one conduit;
• and
• d) a flow restriction between said inlet portion and said outlet portion for establishing said relatively high pressure region within said inlet portion and said relatively low pressure region within said outlet portion,
• whereby the differential pressure between said interior region of said canister and said interior region of said collapsible container effectuates a proportional dispensement of liquid additive into the fluid system.

An additive dispensing apparatus for a fluid system comprising:

• a) a head having a body portion adapted and configured for fluid communication with the fluid system and having a flow path extending therethrough;
• b) a fluid inlet portion of said flow path defining a relatively high pressure region, and a fluid outlet portion of said flow path defining at least in part a relatively low pressure region;
• c) a canister, operatively associated with said body portion, having an interior region and opposed top and bottom ends;
• d) an end cap provided at said top end of said canister and having an axial connector portion provided thereon;
• e) at least one radially extending aperture formed in said axial connector portion for providing fluid communication between said fluid inlet portion and said interior region of said canister;
• f) a plurality of axially extending apertures formed in said axial connector portion for providing fluid communication between said interior region of said canister and said fluid outlet portion;
• g) a collapsible container disposed within said interior region of said canister and having an interior region for containing liquid additive for dispensement into the fluid system;
• and
• h) an elongated feed tube disposed between said collapsible container and said fluid outlet portion for providing fluid communication therebetween, whereby the differential pressure between said interior region of said canister and said interior region of said collapsible container effectuates a proportional dispensement of liquid additive into the fluid system.

An additive dispensing apparatus for use in conjunction with a fluid system including a head defining a fluid flow path having at least in part a relatively high pressure region and a relatively low pressure region, and an enclosure in fluid communication with said relatively high pressure region and defining an interior region, the apparatus comprising:

• a) a collapsible container disposed within the interior region of the enclosure and having an interior region for containing liquid additive for dispensement into the fluid system;
• b) at least one elongated feed tube for facilitating fluid communication between said collapsible container and said relatively low pressure region;
• and
• c) a check valve operatively associated with said collapsible container for controlling the flow of liquid additive from said collapsible container.