1. Thoracic breastpump comprising a first pressure chamber (22), a second pressure chamber (23) and the actuator (20) disposed so as to hydraulically separate the two chambers (22, 23), wherein the actuator (20) is movable to create a reverse differential pressure in the second chamber (23) for creating a pressure drop in the first pressure chamber (22), or from the first pressure chamber (22) resets the pressure drop, wherein the actuator (20) comprises a first element (30) of the piston and a second member (32 ) of the piston, the diameter of the first member (30) of the piston is greater than the diameter of second member (32) piston and the first pressure chamber (22) is disposed between the first member (30) and a second piston member (32) porshnya.2. Thoracic breastpump of claim 1 further comprising a funnel (11) for receiving a breast, wherein the second pressure chamber (23) comprises a recess (16) for receiving a breast, a certain funnel (11) .3. Thoracic breast pump of claim 1, further comprising a compartment (19), wherein in the compartment (19) slidably located actuator (20) .4. Thoracic breast pump according to claim 3, wherein each of the first and second members (30, 32) comprise a piston seal (40, 42, 59, 63) extending from the outer rim (35, 38) of each element (30, 32) of the piston the inner surface (26, 27) cover (19) to form a hydraulic uplotneniya.5. Thoracic breast pump according to claim 4, wherein the seal (59, 63) is slipping into uplotneniem.6. Thoracic breast pump according to claim 4 or 5, wherein the first pressure chamber (22) is arranged between the seal (40, 59) of the first element (30) and the piston seal (42, 63) of the second element (32) porshnya.7. Thoracic breast pump according to claim 4 or 5, wherein the second pressure chamber (23) extends from the seal (42, 63) of the second element (32) porshnya.8. bosom1. Грудной молокоотсос, содержащий первую напорную камеру (22), вторую напорную камеру (23) и привод (20), расположенны
