Bird protector for exhaust stack
OwnerDixie N. McDonaldinventor
Life of this patent
Estimating the term…
Abstract
Bird protector apparatus for attachment to the outlet end of a flue gas stack that emits flue gases into the atmosphere. The stack has a concentrically arranged outer annular member spaced from the inner stack for flow of gas therebetween. The protector apparatus prevents birds from alighting on the end of the stack as well as on the protector itself. The protector apparatus comprises a conical wire mesh screen of a size to preclude birds traveling therethrough and to freely allow flue gases to flow therethrough, and has a lower end opposed to an apex. A clamp attaches the lower end of the wire cone to the upper end of the stack, with the apex being axially aligned with the centerline of the stack. An apparatus can be included on the exterior of the wire cone to frighten birds from perching on the apex.
Claims17
A flue gas stack having an outlet end, and a central longitudinal axis, in combination with apparatus to prevent birds from alighting on the outlet end of said flue gas stack, comprising:
- a conical wire screen cap of a size to preclude birds traveling therethrough and to freely allow flue gases to flow therethrough, said cap having a lower marginal end opposed to an apex thereabove;
- fastener means by which said lower marginal end of said cap is affixed to the marginal outlet end of the stack with said apex being axially aligned with the central longitudinal axis of the stack;
- said cap terminates in a sharp point at said apex.
An apparatus for preventing birds from alighting near the outlet of a flue gas stack, the improvement comprising:
- a conical wire screen cap having openings formed therein of a size to preclude birds traveling therethrough and arranged at a slope to prevent birds from perching thereon, and to freely allow flue gases to flow therethrough;
- said cap having a lower marginal end opposed to an apex thereof;
- said stack having an upper marginal end and a central longitudinal axis;
- fastener means by which said lower marginal end is adapted to be affixed to the upper marginal end of the stack with said apex being axially aligned with the central longitudinal axis of said stack;
- and, means forming a sharp point at said apex.
In a flue gas stack having an outlet end for emitting flue gases into the atmosphere, said stack having an outer annular member spaced from the stack and concentrically arranged therewith for flow of gas therebetween, the combination with said stack of a cap apparatus to prevent birds from alighting on stacks;
- said stack has an upper marginal end and a central longitudinal axis;
- said cap apparatus comprising a conical screen of a size to preclude birds traveling therethrough and to freely allow flue gases to flow therethrough, said cap having a lower marginal end opposed to an apex thereof;
- fastener means by which said lower marginal end is affixed to the upper marginal end of the stack with said apex being axially aligned with said stack;
- means on the exterior of said cap to frighten birds from perching on the cap;
- the means on the exterior of said cap includes a member attached to said apex and extending upwards therefrom;
- said conical screen forms a sidewall that slopes downwardly and outwardly from the apex thereof.
Dependencies are inferred from the claim text.