Vacuum Vent Valve
Original Publication Date: 1979-Apr-01
Included in the Prior Art Database: 2005-Feb-20
The valve shown is a gravity pressure controlled mechanical device. A valve disk 1 with stem 2, and of sufficient weight, is guided by low friction bearings 3 and 4, and rests in its inactive state on a high resilient circular gravity seal 5. A rim 6, matching the gravity seal diameter, protrudes sufficiently from the disk surface. A high vacuum seal 7 of sufficient smaller diameter is in close proximity to the disk surface.