Flow control product dispenser

Details Flow control product dispenser Flow control product dispenser

2005-07-19

2005-07-19

Bomberg, Kenneth (Department: 3754)

Dispensing

Drip, leakage or waste catching or disposal

Return to main supply

C222S390000, C401S068000, C401S075000, C401S174000, C401S175000

Reexamination Certificate

active

06918511

ABSTRACT:
A dispensing device comprising a container with product outlets, a screw that operates a piston within the container and a torsion spring that biases the screw. The torsion spring includes a hoop having one or more inner tabs. The hoop is frictionally engaged with an interior surface of the container. A boss is fixed to the screw and a flexible arm interconnects the hoop and boss. The torsion spring also includes a spoke that is angularly offset from the flexible arm. Application of a rotational force to the screw urges the piston toward the container outlets, causing the flexible arm to yield, allowing the boss to rotate relative to the hoop until the spoke engages an inner tab. Further rotation releases the hoop from frictional engagement with the container. Once the rotational force is removed, the hoop re-engages the container interior surface and the flexible arm regains its original shape, causing the hub and screw to counter-rotate, which simultaneously moves the piston away from the fluid outlets.

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