Patent ID: 6554026
Filing Date: 2003-04-29
Classification: F16K,Y10T

Abstract:
A valve having a valve housing (10), valve apertures, and elastic diaphragms (17, 18) acting as movable closing elements for the valve apertures, in which the elastic diaphragms (17, 18) are actuated by a pressure-exerting medium, comprising:a. a supply line (11) connecting the valve housing (10) to a vacuum pump (12); b. a suction line (13) connecting the valve housing (10) to a suction head; c. a ventilation port (33) through the valve housing (10) allowing fluid communication between the interior of the valve housing (10) and the exterior of the valve housing (10); d. two valve seats (20, 21) within the valve housing (10) cooperating respectively with the valve apertures, each of the two valve seats (20, 21) having one of the elastic diaphragms (17, 18) respectively as a closure element; and e. two actuating lines (14, 15) cooperating respectively with the elastic diaphragms (17, 18), each of the two actuating lines (14, 15) allowing fluid communication between the elastic diaphragms (17, 18) respectively and the pressure exerting medium, wherein when the elastic diaphragms (17, 18) are in an undeformed position the elastic diaphragms (17, 18) are in an opened position and do not abut the respective valve seats (20, 21), and when the elastic diaphragms (17, 18) are in a deformed position the elastic diaphragms (17, 18) are in a closed position and abut the respective valve seats (20, 21); and wherein when the pressure-exerting medium is applied via a first of the two actuating lines (14, 15) to one of the elastic diaphragms (17, 18), the one of the elastic diaphragms (17, 18) is deformed into the closed position, whereby when a first of the two elastic diaphragms (17, 18) is in the opened position, a second of the two elastic diaphragms (17, 18) is in the closed position and a connection between the supply line (11) and the suction line (13) within the valve housing (10) is open, and when the second of the two elastic diaphragms (17, 18) is in the opened position, the first of the two elastic diaphragms (17, 18) is in the closed position and the connection between the supply line (11) and the suction line (13) is closed and a connection between the suction line (13) and the ventilation port (33) is open.