Patent ID: 7743948

Claim:
Dispensing device for dispensing or discharging a liquid or viscous substance ( 2 ) wherein: at least one pump means ( 4 ) is provided to perform pump motions for sucking said substance ( 2 ) into the dispensing device ( 1 ) and dispense or discharge it therefrom, the pump means ( 4 ) comprises an elastic dome shaped member ( 16 ) which is provided to divide inner parts of the dispensing device ( 1 ) into at least one suction chamber ( 30 ) and at least one dispensing or discharge chamber ( 31 ) which are interconnected through at least one transfer chamber ( 32 ), the dome shaped member ( 16 ) is provided to be brought to perform a first pump motion in one direction (A) by being pressed or pushed inwards to suck substance ( 2 ) into the suction chamber ( 30 ) and simultaneously dispense or discharge substance ( 2 ) from the discharge chamber ( 31 ), and the dome shaped member ( 16 ), when pressure ceases, performs a second pump motion in the opposite direction (D) relative to the first pump motion while said dome shaped member ( 16 ) automatically returns to its original dome shape, thereby feeding substance ( 2 ) from the suction chamber ( 30 ) and through the transfer chamber ( 32 ) into the discharge chamber ( 31 ).