Air curtain apparatus

• US 3,332,334 A
• Filed: 08/09/1965
• Issued: 07/25/1967
• Est. Priority Date: 08/09/1965
• Status: Expired due to Term

• Current Assignee: Herman Melzer
• Original Assignee: Herman Melzer
• Inventors: Melzer, Herman
• Application Number:
  US04/478,075
• Time in Patent Office: 715 Days
• US Class Current: 454/188
• CPC Class Codes: F24F 11/74 for controlling air flow rate or air velocity
• CPC Class Codes: F24F 13/06 Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
• CPC Class Codes: F24F 9/00 Use of air currents for screening, e.g. air curtains

Claims

1. AN APPARATUS FOR PRODUCING AN AIR CURTAIN OF SUBSTANTIALLY UNIFORM DENSITY AND AIR FLOW RATE WHICH IS DIRECTED ACROSS A DOORWAY IN SUBSTANTIALLY THE SAME OUTLINE AS SAID DOORWAY, COMPRISING:

A ROTATABLE PUMP HAVING AN INLET FOR GENERATING A SUBSTANTIALLY CONTINUOUS SUPERATMOSPHERIC PRESSURE OUTFLOW OF AIR, A VOLUTE CROSS SECTION PLENUM CHAMBER WHICH IS PRESSURIZED TO ABOVE ATMOSPHERIC PRESSURE BY SAID PUMP, MEANS FOR MOUNTING SAID PUMP INTERNALLY OF SAID PLENUM CHAMBER, SAID MOUNTING MEANS BEING DISPOSED AT A LOCATION WHICH IS IN NONINTERFERRING POSITION WITH THE FLOW OF SAID AIR, AN AIR OUTLET OF A RECTANGULAR CONFIGURATION FORMING A DISCHARGE OPENING OF SAID PLENUM CHAMBER, MEANS FORMING A DOWNWARDLY EXTENDING, DIVERGING CHAMBER CONNECTING SAID DISCHARGE OPENING WITH THE INTERIOR OF SAID PLENUM CHAMBER, MEANS EXTENDING TRANSVERSELY OF THE CROSS SECTION OF SAID