B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
222/41
B05D 7/24 (2006.01) B05B 12/08 (2006.01) B05D 7/02 (2006.01)
Patent
CA 2035919
METHOD AND APPARATUS OF ISOLATING PNEUMATIC PANELS IN LIQUID APPLICATION SYSTEMS Abstract of the Disclosure A method and apparatus for applying liquid coating materials, adhesives or other liquids is provided in which the liquid material is pumped from a source through a pneumatically operated, diaphragm- type pressure regulator which discharges the liquid at a controlled pressure to a dispenser such as a spray gun. Pressurized air from a pneumatic panel or other air supply device is transmitted to one side of the diaphragm in the pressure regulator through a one-way valve such as a check valve which protects the pneu- matic panel from an upstream flow of liquid from the pressure regulator in the event of a failure of its diaphragm. A fluid bleed device such as a choke is located downstream from the check valve and upstream from the diaphragm in the pressure regulator to vent pressurized air located therebetween, and to permit the escape of at least some of the liquid flowing upstream from the pressure regulator in the event of a failure of its diaphragm which provides a visual indication of the failure of the diaphragm.
Corporation Nordson
Macrae & Co.
LandOfFree
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