DISPOSITIF EMPECHANT AUX OISEAUX DE SE PERCHER

BIRD ANTI-PERCHING DEVICE

Abrégé anglais

A bird anti-perching device is described having a rotatable cylindrical member
extending between two support members and capable of rotating freely if a bird
lands thereon, thereby to form an unstable perch. The device can be attached
to the ledge of a balcony in a number of ways to prevent birds from alighting
on the balcony.

Revendications

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The embodiments of the invention in which an exclusive
property or privilege is claimed are defined as follows:
1. A bird anti-perching device for discouraging
birds from perching on a surface, comprising
(a) two spaced-apart support members;
(b) a rotatable cylindrical member extending
between said two support members and
capable of rotating freely if a bird
lands thereon, thereby to form an
unstable perch.
2. A bird anti-perching device according to
claim 1, wherein said cylindrical member is
provided with at least one centrally located
axle rod so as to be freely rotatable.
3. A device according to claim 1 or 2, wherein
each support member comprises a clamp.
4. A device according to claim 1 or 2, wherein
each support member comprises a velcro
fastening strip.
5. A device according to claim 2, wherein each
support member comprises,
(a) a first clamping member having a
vertical portion, said portion having a
protrusion on one side for inserting
into a corresponding hole located in one
end of the cylindrical member.

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6. A device according to claim 5, wherein the
hole in each end of the cylindrical member is
located in the centre of each end.
7. A device according to claim 6, including a
plurality of said clamping members with a
protrusion on both sides of the vertical
portion to enable a series of cylindrical
members to be positioned adjacent one another.
8. A device according to any of the preceding
claims, wherein each cylindrical member is
located above the surface at such a position
that a bird can not alight between the
cylindrical member and the surface.
9. Each and every novel feature or novel
combination of features herein disclosed.

Description

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BIRD ANTI-PERCHING DEVICE
FIELD OF THE INVENTION
This invention relates to bird anti-perching devices.
More particularly this invention relates to a bird anti-perching
device for discouraging birds from perching on a ledge or other
surface.
OF THE INVENTION
Home owners and apartment dwellers often have difficulty
with unwanted birds which alight on surfaces such as ledges,
railings or fences and leave excrement when they leave.
It is possible to continually clean the affected surface
but this does not address the cause of the problem, namely
unwanted birds.
One attempt to solve the problem can be found in
U.S. Patent No. 5,755,179 which utilizes a rectangular flat
plate suspended by a rod. The flat plate can rotate and may
throw the bird off the plate and prevent it from landing. The
plate is positioned so that it rotates eccentrically around its
axis.
Problems with this approach have become apparent because
birds can perch on a flat plate if they have a second surface on
which to balance a foot.
It would be advantageous to provide an anti-perching
device which prevents a bird from getting a second foothold.
SUMMARY OF THE INVENTION
It is an object of the present invention to prevent a
bird from perching on a ledge or other surface.

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Another object of the invention is to provide for an
product which can be easily attached to the ledge or other
surf ace .
Accordingly, there is provided a bird anti-perching
device for discouraging birds from perching on a surface,
comprising two spaced-apart support members; and a rotatable
cylindrical member extending between said two support members
and capable of rotating freely if a bird lands thereon, thereby
to form an unstable perch.
According to one embodiment of the invention the support
members each have a pin which is respectively inserted in the
center of one end of the cylindrical member, and another portion
which essentially clamps the cylindrical member parallel to the
ledge such that it can rotate freely.
The cylindrical member is positioned so that there is not
sufficient room for a bird to perch between the cylindrical
member and the railing.
It will be understood that the cylindrical member could
be of hollow, solid or other construction.
The cylindrical member could be made of a wide variety of
materials. For example, the member could be made of wood,
plastic, metal or some other material.
The support members could have a second pin immediately
opposite the first pin so that a series of cylindrical members
could be positioned along a railing.
In some cases it is not possible to use proper clamps to
affix the cylindrical member to the ledge, and some form of
velcro* clamping might be used.
It is also possible to permanently affix the cylindrical
member to the ledge instead of using clamps.
*Trade Mark

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BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the invention will now be described,
by way of example, with reference to the following
drawings in which:-
Figure 1 is a side view of one embodiment of the
invention;
Figure 2 is a perspective view of a support member
shown in Figure 1;
Figure 3 is an end of a second type of support
member; and
Figure 4 is an end view to illustrate use of a
different type of support member.
The same reference numerals are used for like parts
throughout.
DETAILED DESCRIPTION
Referring to Figure 1, a rotatable cylindrical
member 2 is supported by two spaced-apart support members
4 and 6 so as to be capable of rotating freely if a bird
lands thereon. In this way an unstable perch is provided.
The cylindrical member 2 is supported on support
members 4 and 6 by means of centrally located axle rods 8
and 10.
In Figure 2, a support member 4 is shown in
perspective view to be a clamp in the shape of an inverted
U with an upstanding or vertical portion 12 for the axle
rod 8. The depending legs 14 and 16 of the U-shaped
support member 4 are each drilled in their approximate
centre to form a respective internally threaded hole
through which an externally threaded rod 18 passes. The
rod is provided with a handle portion 22.

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In use, the support members 4 are fitted over, for
example, the ledge 24of a balcony (Figure 1) of an
apartment and the handles 22 turned so that the support
members 4 and 6 clamp on the ledge 24. The cylindrical
member 2 is thus located above the surface of the ledge 24
at such a position that a bird can not alight between the
cylindrical member 2 and the surface of the ledge 24.
In Figure 3, part of a second embodiment is shown.
A support member 4 is made with an axle rod protrusion 8
on both sides of the vertical portion 12.
In Figure 4 a still further embodiment is shown in
which the support members 4 and 6 are L-shaped in side
view and provided with bolts 26 to fasten them to the top
surface of the ledge (usually formed of concrete).
It will be readily apparent to a person skilled in
the art that a number of variations and modifications can
be made without departing from the true spirit of the
invention which will now be pointed out in the appended
claims.

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