Fan ventilator with air shroud means

• US 3,306,179 A
• Filed: 06/01/1965
• Issued: 02/28/1967
• Est. Priority Date: 06/03/1964
• Status: Expired due to Term

• Current Assignee: Frank Burtenshaw Raymond Alfre, Harold Gowan Peter, Russell Lamble Howard
• Original Assignee: Frank Burtenshaw Raymond Alfre, Harold Gowan Peter, Russell Lamble Howard
• Inventors: RUSSELL LAMBLE HOWARD, FRANK BURTENSHAW RAYMOND ALFRE, HAROLD GOWAN PETER
• Application Number:
  US04/460,042
• Time in Patent Office: 637 Days
• US Class Current: 454/354
• CPC Class Codes: F04D 25/12 the unit being adapted for mounting in apertures
• CPC Class Codes: F04D 29/545 Ducts
• CPC Class Codes: F24F 13/08 Air-flow control members, e.g. louvres, grilles, flaps or guide plates F24F7/013, F24F13/06 take precedence
• CPC Class Codes: F24F 7/007 with forced flow using ducting systems F24F7/06
• CPC Class Codes: F24F 7/025 with forced air circulation by means of a built-in ventilator

Claims

1. A POWERED DISCHARGE VENTILATOR FOR USE MOUNTED ON A BOUNDING STRUCTURE OF A SPACE TO BE VENTILATED BY THE VENTILATOR TO EXTRACT AIR FROM SAID SPACE AND DISCHARGE IT TO THE OUTSIDE OF SAID BOUNDING STRUCTURE, THE VENTILATOR COMPRISING A BODY STRUCTURE ADAPTED TO BE MOUNTED ON THE BOUNDING STRUCTURE, SUPPORT MEANS CARRIED BY SAID BODY STRUCTURE, AN EXTRACTION FAN INCLUDING AN IMPELLER MOTOR UNIT MOUNTED ON SAID SUPPORT MEANS AND HOUSED IN SAID BODY STRUCTURE, SAID BODY STRUCTURE DEFINING PASSAGE MEANS LEADING OUTSIDE SAID SPACE FOR THE DISCHARGE OF THE EXTRACTED AIR, A CIRCULAR SECTIONED SHROUD MOUNTED ON SAID SUPPORT MEANS AND HOUSED IN SAID BODY STRUCTURE, SAID SHROUD HAVING A DOWNSTREAM END AND AN UPSTREAM END, THE DOWNSTREAM END OF THE SHROUD CLOSELY SURROUNDING THE TIPS OF THE BLADES OF THE IMPELLER OF SAID IMPELLER