Self-Clamping Pressure Test Cup
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
The illustrated disk enclosure leak-testing fixture attaches without changing the leak characteristics of the seal being tested. The pressure test cup consists of three concentric chambers, each separated by a seal 11, 12, and 13. Each seal is at a height which conforms to the contour of the disk drive cover. When the cup 6 is placed onto the product cover 7, vacuum is applied to the outside chamber 1. This chamber 1 is the largest by area and provides the self-attaching effect. The middle chamber 2 is a vent 8 and isolates inner chamber 3 from outer chamber 1. This eliminates the risk of the inner chamber 3 leaking into the outer chamber 1 and, in turn, altering the leak rate value. The inner chamber 3 is located over the breather holes 9 of the drive cover 7.