This is another one of those fairly simple designs that hadn’t seemed novel enough for some pet products designer to craft so this is where I come in and depress myself with such a trivial gadget when I know I could be working on space propulsion or green energy...oh god where has my life gone?...This creation originates from quite a few years ago when I was staying in an apartment with a girl named Wynter Collins who owned two Toy Poodles named Jackson and Samuel (Yep...I actually I had to point out the naming collusion to her...but what can you do?) that quite frequently escaped when the front door was even slightly cracked open -- which a door on a twenty something year old’s apartment would likely open numerous times in one day -- which is then followed by a lengthy pursuit of trying to amuse the dog while acknowledging the frustration and getting noticeably closer to the roadway or parking lot -- squish! Fortunately that did not happen in this situation however, it does. You can close your eyes now and imagine the little old lady opening the door while struggling to keep little “Muffin” or “Cupcake” from escaping, because the mailman had a delivery of cookies from the Mayor or the electrician came over for a “visit” which is coincidently the same event that lead to your birth...oh mother...you just couldn’t take your eyes from that deep crevasse starring at you from just above the broken belt and worn paint covered jeans. Oh god, I think I am going to be sick.
43% of American households own a dog. A large percentage of those are small dogs that most often live indoors. That is the audience. All of those who own small dogs who cannot count the numerous times they are shuffling, crouching and sticking their hands, legs and feet in the way of the bemused animal who is conditioned to acknowledge that the outside offers such delights...to pee on.
The general principle of this device is to stop the effort completely by obstructing the path of the animal with a fine mesh or grayed plastic sheet. Mounted near the floor and edging the framing of the door in question, the main unit consists of an approximately 30 cm (12 in) high and 10 cm (4 in) wide plastic cover that is snapped into place over the mounted unit that holds the tensioned cylinder that holds the girth of the mesh or plastic obstruction. This inner unit is a cylinder around a centralized shaft and is stabilized by bearings on both ends of the cylinder around the shaft. In the median of the cylinder and shaft is a stretch of tension spring metal -- like that on a tape measure -- which creates a constant rigidity and tension in the drawn out mesh or plastic as well as retracts the material as the door is closed.
Finishing the end of the mesh or plastic is a metal or plastic rectangular piece with grooved screw openings and a small extended piece of material to allow for the prompt release of the dog door guard from the main door surface, which then allows the entire mesh or plastic screen to retract to the extent of the rectangular piece. This allows the entire unit to be used or disused based on the users leisure.
The inner unit will allow for lengths of the mesh or plastic material to extend to the full aperture of the doorway while still creating the tension in the material to obstruct the animal from escaping. The material is stitched along the edges to create an additional rigidity to obstruct animals from crawling under or leaning over the material. This unit does not deter animals from jumping over the material -- that’s your job to teach the dog. The 30 centimeters of height does statistically govern over most small animals...and does still allow for a comfortable height to step over as a human entering or leaving the premises which is ideal for all small dog owners who frequently enter or leave an establishment with the dog loose inside.