Accession Number : ADD008311

Title :   Pneumatically Operated Airflow Valve.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Wagner,Frederick M

Report Date : 09 Sep 1980

Pagination or Media Count : 6

Abstract : A novel, automatic, pneumatically operated bypass valve is provided in an air duct connecting a fan powered gas-particulate filter unit and an air conditioner unit. The bypass valve contains a bellows, which is automatically inflated by pressurized air transmitted thereto from the filter unit through a separate conduit, thereby closing the bypass valve when the filter unit fan is in operation. When the filter unit fan is turned off, the pressure in the filter unit falls to ambient, which automatically deflates the bellows and opens the bypass valve to provide a fresh air path to the air conditioner unit. (Author)

Descriptors :   *Patents, *Bypass valves, *Air conditioning equipment, *Pneumatic devices, Inventions, Ducts, Air flow, Air filters, Fans, Bellows

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Pumps, Filters, Pipes, Tubing, Fittings & Vlvs

Distribution Statement : APPROVED FOR PUBLIC RELEASE