Method and apparatus of isolating pneumatic panels in liquid application systems
Patent 5016665 Issued on May 21, 1991. Estimated Expiration Date: 
March 7, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 7, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2202286 2389413 2574414 2637946 2746471 3026045 3385522 3714953 Pressure regulator for gaseous and liquid fluids Flow control valve InventorAssigneeApplicationNo. 489519 filed on 03/07/1990US Classes:137/1, PROCESSES137/14, Involving pressure control137/489.5, Pilot controls supply to pressure chamber137/495, With manual or external control for line valve137/551WITH INDICATOR, REGISTER, RECORDER, ALARM OR INSPECTION MEANSExaminersPrimary: Hepperle, Stephen M.Attorney, Agent or FirmInternational ClassG05D 016/18AbstractA 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 pneumatic 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.Other References
Field of SearchBias variable during operationPilot controls supply to pressure chamber With manual or external control for line valve Responsive to change in rate of fluid flow PROCESSES By fluid pressure Involving pressure control WITH INDICATOR, REGISTER, RECORDER, ALARM OR INSPECTION MEANS Inspection means Choked pressure type servo motor With reverse flow prevenging (nonsiphoning) Remote pilot valve actuation Electrically actuated pilot valve | |
