Patent ID: 8573440

Claim:
A dispenser for dispensing a substance, the dispenser comprising: a measuring chamber having an adjustable volume for receiving the substance substantially in a predetermined amount through a valve; a conduit section that adjusts the volume of said measuring chamber by moving a plunger that forms a wall of said measuring chamber, wherein said valve can selectively seal the substance within said measuring chamber, and said plunger comprises a spout through which the substance can be dispensed as said plunger is moved by said conduit section into said measuring chamber to reduce the volume of said measuring chamber, wherein said valve can be closed by rotating said measuring chamber relative to a container from which the substance is received, wherein said measuring chamber is rotated relative to the container to effectuate a rotation of a first disc of said valve relative to a second disc of said valve, said second disc being concentric with and stacked upon said first disc, and each of said first disc and said second disc having a cutout portion, wherein said valve can be closed when a non-cutout portion of said first disc overlaps and covers said cutout portion of said second disc to form a barrier seal, and wherein said first disc of said valve is fixed so as to not be rotatable relative to said measuring chamber, and said second disc of said valve is fixed so as to not be rotatable relative to the container when the dispenser is attached to the container; and a container-connecting conduit section comprising a notch that slides within a groove of said measuring chamber, wherein when an end part of said container-connecting conduit section having said notch is inserted within an end part of said measuring chamber having said groove, said notch fits within said groove to keep said container-connecting conduit section and said measuring chamber attached together, wherein a length of said groove is longer than a length of said notch so as to allow for confined and limited rotation of said container-connecting conduit section with respect to said measuring chamber, wherein the rotation of said container-connecting conduit section with respect to said measuring chamber is limited in clockwise and counter-clockwise rotation directions based on points at which said notch abuts each respective end of said groove, such that said notch can move within said length of said groove, wherein said measuring chamber is allowed to rotate relative to said container-connecting conduit section, whereby at one end of the rotation said cutout portion of said first disc is aligned with said cutout portion of said second disc and said valve is open, and whereby at another end of the rotation said non-cutout portion of said first disc overlaps and completely covers said cutout portion of said second disc and said valve is closed, and wherein said plunger comprising said spout is provided along a same axis as said measuring chamber, said conduit section and said container-connecting conduit section.