1. A bird cage cleaning assembly for bird cages comprising:
a bird cage;
a lower cleaning sink attached to the bird cage, said lower cleaning sink having a perimeter wall extending upward from a floor that angles downward towards a drain;
an extension pole having a bottom end and a top end that is attachable to an upper cleaning sink by an integral attachment means;
a loop extending from the top end of the extension pole; and
a curtain attached to the loop.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. Pedicle screw (1), comprising a screw shank (2) with a ball head (17) as well as a screw head (3) having
two opposite recesses, characterized in that the ball head (17) has two opposite parallel surfaces (18a, 18b) which abut on corresponding parallel surfaces (18c, 18d) of the screw head (3) and in that a longitudinal axis passes through the two opposite recesses of the screw head (3) perpendicular to the parallel surfaces (18c, 18d) of the screw head (3) and in that the screw head (3), which is supported on the screw shank (2), cannot freely rotate about the longitudinal axis of the screw shank (2),
a fixation means (5),
a ball element (6) with a recess for receiving a linking member (4) that is supported such that it is movable in the screw head (3),
wherein the ball element (6) consists of two olives (8,9) supported on each other, having an internal diameter which is preferably equal to the external diameter of the linking member (4), having an external diameter which is substantially equal to the internal diameter of a bore in the screw head (3) in a direction parallel to the longitudinal axis of the screw shank (2), and the lower olive (8) is facing the screw shank (2) and the upper olive (9) is facing the fixation means (5), wherein the screw head (3) has an opening for receiving the fixation means (5) on the side which is opposite the screw shank (2), a tip of the fixation means (5) has a guide pin (11), and the upper olive (9) facing the fixation means (5) has a recess (10) for receiving the guide pin (11) of the fixation means (5).
2. Pedicle screw according to claim 1, characterized in that the ball element (6) has a bore along an axis which passes through the two opposite recesses.
3. Pedicle screw according to claim 1, characterized in that the screw head (3) is supported on the ball head (17) of the screw shank (2) such that the screw head (3) can make one-dimensional tilting movements about the axial axis.
4. Pedicle screw according to claim 1, characterized in that the screw head (3) has a convex curvature (13) on a side facing the screw shank (2).
5. Pedicle screw according to claim 1, characterized in that the fixation means (5) is a threaded pin.
6. Device for the stabilization of the spine comprising at least two pedicle screws (1), each pedicle screw comprising a screw shank (2) with a ball head (17) as well as a screw head (3) having
two opposite recesses, characterized in that the ball head (17) has two opposite parallel surfaces (18a, 18b) which abut on corresponding parallel surfaces (18c, 18d) of the screw head (3) and in that a longitudinal axis passes through the two opposite recesses of the screw head (3) perpendicular to the parallel surfaces (18c, 18d) of the screw head (3) and in that the screw head (3), which is supported on the screw shank (2), cannot freely rotate about the longitudinal axis of the screw shank (2),
a fixation means (5),
a ball element (6) with a recess for receiving a linking member (4) that is supported such that it is movable in the screw head (3),
wherein the ball element (6) consists of two olives (8,9) supported on each other, having an internal diameter which is preferably equal to the external diameter of the linking member (4), having an external diameter which is substantially equal to the internal diameter of a bore in the screw head (3) in a direction parallel to the longitudinal axis of the screw shank (2), and the lower olive (8) is facing the screw shank (2) and the upper olive (9) is facing the fixation means (5), wherein the screw head (3) has an opening for receiving the fixation means (5) on the side which is opposite the screw shank (2), a tip of the fixation means (5) has a guide pin (11), and the upper olive (9) facing to the fixation means (5) has a recess (10) for receiving the guide pin (11) of the fixation means (5),
and at least one linking member (4).
7. Device according to claim 6, wherein the at least one linking member (4) is a support rod, tube, wire netting, guide bar or a bent guide rod.