Simplified undirectional twist-up dispensing device with incremental dosing

The twist-up dispensing device for dispensing a product, said dispensing device comprising:

• a) a hollow housing defining a chamber having an open dispensing end and an actuating end, said actuating end having an interior surface, said interior surface is cylindrical and includes a lip and a plurality of detents;
• and
• b) a piston located within said chamber, said piston being limited to translational movement within said chamber, said piston having a top side facing said dispensing end of said housing and having a threaded rod extending therefrom opposite said top side, a variable volume portion of said chamber formed between said chamber and said top side of said piston, said variable volume portion for storing said product;
• and
• c) a hand wheel including a grip portion and an actuator, said hand wheel being a single integral component unitarily formed from a plastic material, said actuator having a threaded aperture therethrough, said threaded aperture being concentric in said actuator, said actuator engaging said interior surface at said actuating end of said housing and being adapted to rotate with respect to said housing in only one direction, said actuator includes a groove engaged with said lip such that said actuator is rotatable but cannot move axially relative to said interior surface, said actuator also having at least one resilient arm extending outwardly and engaging a said detent such that said actuator is rotatable in an advancing direction but not in an opposite direction, said threaded rod engaging said threaded aperture such that advancement of said piston toward said dispensing end occurs when said actuator is rotated, thereby causing said product to be dispensed in an incremental manner;
• and
• d) an applicator attached to said dispensing end of said housing in fluid communication with said variable volume portion of said chamber wherein said product is dispensed through said applicator.