William L Gaskins

US Patent:

7566355, Jul 28, 2009

Filed:

Nov 9, 2005

Appl. No.:

11/269672

Inventors:

William Gaskins - Fort Washington MD, US

International Classification:

F24F 7/02
F24F 7/06

US Classification:

553854, 55DIG 20, 454 7, 454 18, 454 27, 454 30, 454184, 110184

Abstract:

A device is described which may be fashioned to be installed over an existing unprotected intermittently acting vent pipe of a building, from which malodorous internal air from bathrooms, kitchens, areas where cigar or cigarette smoking ensues and the like, are expelled. It is made from a length of pipe of slightly larger circumference than the existing vent pipe and is stably attached at its lower end to the upper end of the vent pipe. A hinged cap of the same geometric shape as the pipe but of slightly larger dimension is attached at its upper end. Preferably the upper end of this pipe is fashioned so that the pipe rim is not flat but either (1) slants steeply from an upper rim segment on which the hinge of the cap is mounted to a lower rim portion or (2) has two diametrically oppositely disposed high points, from the axis of which the rim slants downward about 15-20 angular degrees in opposite directions with the hinge mounted along said axis and two identical cap portions slanting downward therefrom in opposite directions. Essentially the same device is made with one uniform length of pipe for places where there is no existing intermittently acting vent pipe. The device in either form prevents ingress to the building of unwanted airborne substances.