Static ventilator including a corrugated portion
OwnerMichel Poitrasinventor
Life of this patent
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Abstract
A static ventilator provided with a deformable corrugated portion is described herein. The static ventilator is provided with a tubular base to be installed to the roof, a sleeve to be connected to the tubular base and a cover to be installed to the free end of the sleeve. The tubular base is provided with a deformable corrugated portion enabling the tubular base to be installed to a sloping roof while allowing the sleeve to be positioned and maintained in a generally vertical orientation. The present invention is also concerned with a method for forming a tubular base for static ventilator provided with a corrugated portion.
Claims5
A method for forming a base having a corrugated portion for a static ventilator comprising the steps of:
- providing a first mold having a distal end, a longitudinal axis and a cylindrical portion defining a first predetermined diameter;
- removably securing a metal sheet to said distal end of said first mold;
- spinning said first mold and said metal sheet about said longitudinal axis of said first mold;
- chasing said metal sheet against said first mold to form an intermediate base provided with a cylindrical portion of said first predetermined diameter;
- providing a second mold having a distal end, a longitudinal axis and a cylindrical portion defining a second predetermined diameter smaller than said first diameter of said first mold;
- removably securing said intermediate base to said distal end of said second mold so that said cylindrical portion of said intermediate base overlaps said cylindrical portion of said second mold;
- spinning said second mold and said intermediate base about said longitudinal axis of said first mold;
- chasing part of said intermediate base against said smaller cylindrical portion of said second mold to form the corrugated portion of said base having a corrugated portion.
Dependencies are inferred from the claim text.