Patent Publication Number: US-11384595-B1

Title: Securable pet door

Description:
BACKGROUND 
     Doors are pathways to new places and spaces. Passing through a door may also allow a homeowner to get from one room of the house to another, or a professional to pass between rooms in an office. Passing through a door allows a traveler to leave a known area and venture into an unknown one. Equally as important, doors can be locked, offering security to the spaces they help define. An open door often implies a welcoming environment, while a closed door implies a desired environment of privacy or even secrecy. 
     Doors come in a variety of shapes and sizes, to accommodate different kinds of travelers. Some are plain, some are decorated with ornate detail. A common festivity around the world is to seasonally decorate doors to celebrate sports teams, holidays, and other miscellaneous celebrations. Many doors can be replaced when after they accumulate significant wear and tear. Some doors have windows, are completely transparent, or can be incrementally opened, such as a Dutch door. Many doors open and close manually, but other doors may do these actions automatically, with the help of an activation button or motion sensor. However, these features are often lacking, if not completely absent, from the market for pet doors. 
     Pet doors are often used internally and externally to help pet owners control how their pets navigate within and into or out of their homes. Pet doors may connect the inside of a home to the external elements, or may simply connect one room of a home to another. Due to their nature, pet doors are often hard to control once installed. The true users of pet doors are animals, who are unaware of proper door etiquette such as ensuring an exterior door is completely closed, so as to prevent a way of entry for bad actors or the elements. 
     Typically, once they are installed, pet doors are hard to maintain, secure, and customize. Most pet doors available in the market today add to the amount of dirt being tracked into the home, do not completely close, and cannot be completely secured. As a result, pet owners who utilize pet doors often clean the area surrounding the installation area more, relying on third party equipment to close and secure the door when not in use, and needing to remember to subsequently remove any securing devices when the door is actually be used by a pet. Interior pet doors are often used to control a pet&#39;s access to certain areas inside the house. Furthermore, since most pet doors are manually operated, should a pet door get stuck or break, the pet may be either deterred from further use or be injured in the process. 
     SUMMARY OF THE DISCLOSURE 
     What is needed is an installable, customizable, and securable pet door. The pet door may resemble a standard human door, with a knob, hinge, and windows, as non-limiting examples. In some embodiments, the knob may comprise a latch for secure closing. When the pet door comprises a hinge, the hinge may be inserted into a hinge recess so that the door may be securely locked in an open position. This removes the need to turn to third party locking mechanisms or systems to safely secure the pet door. In some implementations, the pet door may include a sliding mechanism to insert itself into a frame. In some implementations, the orientation of the knob to the door, the door to the frame, the hinge to the door and the frame, and the plurality of windows to the door may be predetermined or customizable. Having the ability to choose how these elements fit together, and even the option to change them later, allows the pet owner to truly customize the pet door system for their needs. 
     In some implementations, the door may be open from, slide into, open up and out of, revolve within, or move in some other non-limiting equivalent way from or relative to the frame. The knob or door, or both, may be interchangeable within the pet door system. For example, the door may be replaced with a seasonal door during the relevant holiday or season. This would allow the pet owner to include the pet door system in the overall design and feel of their home, as opposed to being stuck with a pet door that may amount to no more than an eye sore. 
     In some aspects, the frame may comprise a sensor. When the frame comprises a sensor, the sensor may interface with an external device, such as a doormat, to open and close the door automatically as a result of a change in motion, temperature, or other non-limiting sensible feature or method. The sensor may work in tandem with or separately from, or some combination thereof, with the external device to detect a pet&#39;s presence and open or close the door, accordingly. This would enable the pet door system to be semi-automatic and responsive to the actions and presence of a pet, not just a pet owner. Pets would be able to operate this door themselves, without the aforementioned cleanliness and security repercussions. For example, the pet door may securely lock once the sensor no longer detects a pet trying to pass through. 
     The present disclosure relates to a pet door that may include a first frame, where the first frame may be configured to partially embed within a first external surface; a hinge, where the hinge may be configured to pivot along a pivot axis defined by the first frame; a door, where at least one edge connects to the hinge; a knob, where the knob may be attached to a surface of the door. In some embodiments, the pet door includes a latch, where the latch extends from a rotational axis of the knob and interfaces with the first frame; a first connector frame extending from the first frame, where the first connector frame may be configured to be fully embedded within the first external surface; a second frame, where the second frame may be configured to partially embed within a second external surface, where when the first frame and the second frame are embedded, a portal from the first external surface to the second external surface may be created; and a second connector frame extending from the second frame, where the second connector frame may be connectable on a distal end to the first connector frame, and where when connected, the second connector frame may be configured to be fully embedded within the second external surface. 
     In some implementations, the pet door where the first frame may comprise a hinge recess that secures the hinge in a plurality of predetermined positions. In some aspects, the door may be secured in a fixed position by a door stopper. In some embodiments, the door stopper may be attached to the first external surface and interfaces with a door edge. In some implementations, the door stopper may be attached to the first external surface and interfaces with the knob. 
     In some aspects, the door stopper may be part of the first frame and interfaces with a door edge. In some embodiments, the door stopper may be part of the door and interfaces with a recess in the first frame. In some implementations, the frame may comprise a latch receiver configured to receive a latch extending from the door. In some aspects, the latch receiver may be internal to the first frame. In some embodiments, the latch receiver may be external and attached to the first frame. In some implementations, the door extends into a region between the first external surface and the second external surface. In some aspects, the first frame or second frame, or both, may comprise a sensor. In some embodiments, the sensor interacts with an external device. In some implementations, the first external surface may comprise a panel insertable proximate to a sliding glass door. 
     The present disclosure relates to a pet door that may include a first recessed frame, where the first recessed frame may be configured to recess into a first external surface; a first hinge, where the hinge pivots along a pivot ax may be defined by a first side of the first recessed frame; a first door, where at least one edge connects to the first hinge; a first knob, where the first knob may be attached to a surface of the first door. In some aspects, the pet door includes a second hinge, where the hinge pivots along a pivot ax may be defined by a second side of the first recessed frame; a second door, where at least one edge connects to the first hinge. In some embodiments, the pet door includes a second knob, where the second knob may be attached to a surface of the second door; a first connector frame, where the first connector frame may be attached to the first recessed frame; a second connector frame, where the second connector frame may be configured to connect to the first connector frame; and a second recessed frame configured to recess into a second external surface, where the second frame extends distally from the second connector frame and where when the first frame and the second frame are recessed, a portal from the first external surface to the second external surface may be created. 
     In some implementations, the pet door may comprise a locking mechanism. In some aspects, the locking mechanism may comprise a latching mechanism located on the first knob and a positioning mechanism located proximate to the second knob, where the positioning mechanism may be configured to limit a position of the latching mechanism, and where the latching mechanism may be configured to fit over the second knob when in a locked position. In some embodiments, the first door and the second door extend into a region between the first external surface and the second external surface. In some implementations, the first frame or the second frame, or both, may comprise magnets for retaining one or both the first door and the second door in a fixed position. In some aspects, the external device controls a position of one or both the first door and the second door. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings that are incorporated in and constitute a part of this specification illustrate several embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure: 
         FIG. 1  illustrates a pet travelling through an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 2  illustrates a front view of an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 3  illustrates a side view of an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 4A  illustrates a side view of an installed exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 4B  illustrates a side view of an installed exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 5A  illustrates an exemplary pet door with an external door stopper, according to some embodiments of the present disclosure. 
         FIG. 5B  illustrates an exemplary pet door with an external door stopper, according to some embodiments of the present disclosure. 
         FIG. 5C  illustrates an exemplary pet door with an external door stopper, according to some embodiments of the present disclosure. 
         FIG. 5D  illustrates an exemplary pet door with an external door stopper, according to some embodiments of the present disclosure. 
         FIG. 5E  illustrates an exemplary pet door with an external door stopper, according to some embodiments of the present disclosure. 
         FIG. 6  illustrates an exemplary pet door comprising a latch, according to some embodiments of the present disclosure. 
         FIG. 7A  illustrates an exemplary sliding pet door, according to some embodiments of the present disclosure. 
         FIG. 7B  illustrates an exemplary sliding pet door, according to some embodiments of the present disclosure. 
         FIG. 8A  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 8B  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 9  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 10  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 11A  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 11B  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 11C  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 11D  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 12A  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 12B  illustrates an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 13  illustrates a front view of an exemplary pet door, according to some embodiments of the present disclosure. 
         FIG. 14A  illustrates an exemplary locking mechanism in an unlocked position, according to some embodiments of the present disclosure. 
         FIG. 14B  illustrates an exemplary locking mechanism in an unlocked position, according to some embodiments of the present disclosure. 
         FIG. 14C  illustrates an exemplary locking mechanism in a locking position, according to some embodiments of the present disclosure. 
         FIG. 14D  illustrates an exemplary locking mechanism in a locked position, according to some embodiments of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure provides generally for an installable, customizable, and securable pet door. According to the present disclosure, the pet door may comprise a door, a knob, a plurality of windows, a frame, and a hinge. 
     In the following sections, detailed descriptions of examples and methods of the disclosure will be given. The description of both preferred and alternative examples, though thorough, are exemplary only, and it is understood to those skilled in the art that variations, modifications, and alterations may be apparent. It is therefore to be understood that the examples do not limit the broadness of the aspects of the underlying disclosure as defined by the claims. 
     Glossary 
     
         
         
           
             Knob: as used herein, refers to any kind of appendage that can be fixed on a door and turned, pulled, pushed, or moved in another non-limiting way to open and close the door. The knob may comprise a generic doorknob or any kind of handle, point, grip, sliding mechanism, or other non-limiting equivalent. 
           
         
       
    
     The present disclosure describes an installable, customizable, and securable pet door. In some embodiments, the pet door may comprise a door, a knob, a plurality of windows, a frame, a hinge, a latch, a sensor, and other non-limiting features that may allow the pet door system to operate semi-automatically, securely open and close, and be better suited for safe use by a pet. 
     Referring now to  FIG. 1 , an exemplary pet door  100  is illustrated. In some embodiments, the pet door  100  may comprise a door  105 , a knob  110 , a window  115 , and a frame  120 . In some implementations, the pet door  100  may be used to travel between two spaces separated by a barrier, such as a wall or door, by a pet  199 . In some aspects, the pet  199  may be a large or small feline, canine, or other non-limiting examples. 
     In some embodiments, the door  105  may comprise plastic, vinyl, wooden, carpet, metallic, textured, hook-and-loop, or other non-limiting equivalent material. In some implementations, the door  105  may be customizable to match or complement the exterior or interior design of the pet  199  owner&#39;s home or room. For example, the door  105  may comprise a material that allows seasonal decorations to be added or removed from the door  105 . In some aspects, the door  105  may also be interchangeable, so the pet  199  owner has more than one option to choose from to match or complement the surrounding décor. This ability to alter the pet door  100  allows the pet  199  owner to fully incorporate the pet door  100  into their home. 
     In some implementations, the knob  110  may resemble a generic doorknob, handle, bar, grip, fixture, or other non-limiting examples. The knob  110  may enable the pet  199  owner to securely close the pet door  100  when not in use. In some embodiments, the knob may enable the pet  199  owner to open the pet door  100  with ease, as opposed to having to apply pressure to the pet door  100  itself, which may damage the pet door  100  if too much force is applied. 
     For example, the knob  110  may turn, push in and out, slide, or be static. In some embodiments, the knob  110  may comprise the same or a different material than the door  105 . In some aspects, the knob  110  may be interchangeable or removed entirely, depending on the pet  199  owner&#39;s preference. 
     In some embodiments, the window  115  may comprise a pane of glass, pane of plastic, pane of vinyl, some other non-limiting equivalent, or simply be an opening in the door  105 . For example, the window  115  may comprise one pane or a plurality of panes. In some aspects, the window  115  may allow the pet  199  owner to see through the pet door  100  if it is securely closed. For example, the pet  199  may want to reenter the home through an exterior pet door  100 . The window  115  would enable the pet  199  owner to keep the exterior pet door  100  closed while the pet  199  is not traveling through the door  105  and see the pet  199  waiting outside of the closed door  105 . In some embodiments, the window  115  may provide a barrier from external particles, dust, dirt, and other non-limiting examples from entering the interior of the passageway. The barrier may prevent tracking in dirt that is common with other pet doors. 
     In some implementations, the door  105  may comprise more than one window  115 . 
     For example, there may be a plurality of windows  115  at the top, near the bottom, along a side, or variably placed throughout the door  105 , as non-limiting examples. In some aspects, the window  115  may comprise a material that is translucent, frosted, textured, or some other non-limiting equivalent. 
     In some embodiments, the frame  120  may comprise the same or a different material than the door  105 , the knob  110 , the window  115 , or some combination thereof. In some implementations, the frame  120  may align with the shape of the door  105 . In other aspects, the frame  120  may comprise a different shape than the door  105 . In some aspects, the frame  120  may insert into an exterior or interior wall or door so the pet door  100  may be used by a pet  199 . 
     In some embodiments, the frame  120  may comprise an appendage or nodule that allows the door  105  to be secured in place, whether in a closed, completely open, or partially open position, to either the frame  120  or the wall the pet door  100  is inserted into. In other implementations, the frame  120  may comprise an extrusion that may prevent the door  105  from swinging in multiple directions within the frame  120 . 
     For example, for an exterior pet door  100 , the door  105  may be limited to only swinging inside as opposed to outside by and within the frame  120 . In some embodiments, this limit in the range of the door  105  may assist in aligning the latch of the door  105  to the corresponding slot in the frame. This may be a critical assistance when the latch and corresponding slot are sufficiently small to impede normal manual alignment. In some aspects, the frame  120  may allow the door  105  to open and close in multiple directions. 
     Referring now to  FIG. 2 , a front view of an exemplary pet door is illustrated. In some embodiments, the pet door  200  may comprise a door  205  and a knob  210 . In some implementations, the pet door  200  may comprise a plurality of windows  215 , a frame  220 , and a hinge  230 . In some aspects, the hinge  230  may couple to the door  205  and the frame  220 , so the door  205  may open and close. 
     In some embodiments, the hinge may comprise a strap hinge, butt hinge, spring-loaded hinge, concealed hinge, piano hinge, offset hinge, overlay hinge, hidden barrel hinge, scissor hinge, gate hinge, or other non-limiting equivalents. In some implementations, the hinge  230  may be removeable, so a pet owner may customize the orientation and opening of the door  205 . This may allow the pet owner to reuse the pet door  200  in a plurality of locations. 
     For example, if the pet owner purchased the pet door  200  while living in one house and then moved to another, the pet owner may need to adjust the orientation of the components of the pet door  200  in order to better suit the new space. In some aspects, the hinge  230  may be exposed or concealed by either the door  205  or frame  220 , or both. The hinge  230  may allow the door  205  to be secured in a closed, completely open, or partially opened position, depending on the needs of the pet and the pet owner. 
     Referring now to  FIG. 3 , a side view of an exemplary pet door is illustrated. In some aspects, the pet door  300  may comprise a door  305 . In some embodiments, the pet door  300  may comprise a knob  310 . In other implementations, the pet door  300  may comprise a plurality of windows  315 . In some embodiments, the pet door  300  may comprise a frame  320 , a recessed frame  325  coupled to the frame  320 , and a hinge  330 . In some implementations, the frame  320  may comprise a hinge recess  331 . The hinge  330  may insert into the hinge recess  331  to secure the door  305  in an open position. In some implementations, the hinge recess  331  may be housed within the frame  320 . 
     For example, a pet owner may wish to keep the door  305  securely ajar. In some aspects, the door  305  may begin in a closed position, aligned with the frame  320 . When opened, the door  305  may be pushed toward the frame  320 , prompting the hinge  330  to align with and insert into the hinge recess  331 . 
     In this example, to open and close the door and not keep it in a particular fixed position, the pet owner may have to perform an additional securing motion to prevent the door  305  from accidently clicking into a fixed position. This additional securing motion may involve lifting the door  305  up so that the hinge  330  uncouples from or misaligns with the hinge recess  331 . In some embodiments, the hinge recess  331  may be accessed at only one or a plurality of open positions. In some aspects, the hinge  330  and hinge recess  331  may be oriented vertically, as shown, or horizontally. 
     In some embodiments, the recessed frame  325  is coupled to the frame  320 , providing stability when inserted into an exterior or interior wall or door for use. The recessed frame  325  may be the same or different size or shape from the frame  320  or door  305 . In some implementations, the recessed frame  325  comprises the same or a different material from the frame  320  or the door  305 . The recessed frame  325  may prevent tails or pet hair from being caught in the hollow cavity that may otherwise be exposed between the outer panels of a wall or door, allowing for safe, pain-free passage of the pet through the pet door  300 . The recessed frame  325  may also allow for a snugger fit when the pet door  300  is installed. 
     Referring now to  FIGS. 4A-B , a side view of an exemplary pet door  400 ,  401  is illustrated. In some embodiments, the pet door  400  may comprise a knob  410 . In some implementations, the pet door  400  may comprise a first frame  420  and a second frame  421 . When the pet door  400  comprises a first  420  and second  421  frame, the pet door  400  may also comprise a first connected frame  425  and a second connected frame  426 . The first connected frame  425  may be coupled to the first frame  420  and the second connector frame  426  may be coupled between the first connected frame  425  and the second frame  421 . This configuration may allow the pet door  400  to insert into an exterior or interior wall or door so that the first frame  420  and second frame  421  protrude from the opposing surfaces of the exterior or interior wall or door. 
     In some implementations, the pet door  401  may comprise a knob  411 , a first recessed frame  422 , a second recessed frame  423 , a first connector frame  427  coupled to the first recessed frame  422 , and a second recessed frame  428  coupled between the first connector frame  427  and the second recessed frame  423 . This configuration may allow the pet door  401  to insert into an exterior or interior wall or door so that the entire pet door  401 , when closed, is at most flush with the existing exterior or interior wall or door. In some embodiments, a pet door  400  may drop into a pocket where it can lock in place. 
     For example, an interior door in a home may slide into a pocket in the wall. If a pet owner wanted to install a pet door  400  to the interior door, the interior door may be unable to function normally. If a pet owner, however, installed a pet door  401  to the interior door, the door would still be able to slide into and out of the associated pocket in the wall. Referring now to  FIGS. 5A-E , an exemplary pet door  500 ,  501 ,  502  with a door stopper  540 ,  541 ,  550 ,  551  is shown. In some embodiments, the pet door  500  may comprise a door  505 , a knob  510 , a plurality of windows  515 , a frame  520 , and a hinge  530 . In some implementations, the frame  520  may comprise an interior door stopper  540 . 
     In some aspects, the interior door stopper  540 ,  541 ,  550 ,  551  may protrude from the frame  520  and catch the door  505 , preventing it from fully closing. In some embodiments, the interior door stopper  540  may protrude from the door  505  and insert into a recess in the frame  520 , securing the door  505  within the frame  520  when closed. In some aspects, the pet door  500 ,  501 ,  502  may interface with an external door stopper  541 ,  550 ,  551 . 
     In some implementations, the external door stopper  541  may align to a corner of the door  505  so when the door  505  is in its maximally opened position, the corner of the door  505  may rest on, couples to, or attaches to the external door stopper  541 . In some embodiments, the connection between the external door stopper  541  may be maintained by a lock-and-key mechanism, magnets, hook-and-loop fastener, adhesive material, or other non-limiting examples. 
     In some implementations, the external door stopper  550 ,  551  may receive the knob  510  of the door  505  when the door  505  is in its maximally opened position. In some embodiments, the external door stopper  550 ,  551  may be sized to accommodate the knob  510 . In some aspects, the connection between the external door stopper  550 ,  551  and the knob  510  may be maintained by a lock-and-key mechanism, magnets, hook-and-loop fastener, adhesive material, or other non-limiting examples. In some embodiments, the external door stopper  550 ,  551  may couple to the same exterior or interior wall or door as the pet door  500 ,  501  is installed into at a predetermined distance from the pet door  500 ,  501  so the external door stopper  550 ,  551  may properly receive the knob  510 . This may allow the pet owner to secure the door  505  in an open position, so the pet may pass freely through the pet door  500 . 
     Referring now to  FIG. 6 , an exemplary pet door  600  is illustrated. In some aspects, the pet door  600  may comprise a door  605 . In some embodiments, the pet door  600  may comprise a knob  610 . In some aspects, the pet door  600  may also comprise a one or more windows  615 . In some implementations, the pet door  600  may comprise a frame  620 . In some aspects, the pet door  600  may comprise a hinge  630 . In some embodiments, the knob  610  may comprise a locking mechanism. For example, the locking mechanism may comprise a latch  660  and the frame  620  may comprise a latch receiver  665 . 
     For example, the knob  610  may comprise a latch  660  that rotates and inserts into a latch receiver  665  to secure the door  605  in a completely closed position. The latch receiver  665  may be removable so that a pet owner could freely decide the orientation of the door  605  within the frame  620 . In some implementations, the latch receiver  665  may couple to the frame  620 , magnetically or by some other non-limiting adhesive, or be permanently carved into the frame  620 . The latch  660  may be coupled to the knob  610 , but this is not limiting. 
     In some aspects, the latch  660  may be coupled to any part of the pet door  600  and the latch receiver may also be coupled to any part of the pet door  600  or located at some point near it for use. The latch  660  and corresponding latch receiver may allow the pet owner to secure the door  605  in a closed position when the pet door  600  is not in use by a pet, such as when the pet door  600  is an exterior pet door and the pet owner does not want dirt and other outside elements to be tracked or blown into their home. 
     Referring now to  FIGS. 7A-B , an exemplary sliding pet door  700 ,  701  is illustrated. In some embodiments, the sliding pet door  700 ,  701  may comprise a door  705 ,  706 , a knob  711 ,  712 , and a frame  720 ,  721 . In some implementations, the sliding pet door  700  may comprise a plurality of windows  715 . In some aspects, the sliding pet door  701  may comprise attachment mechanism  770  or an activation mechanism  780 , or both. The attachment mechanism  770  may comprise a plurality of magnets, a plurality of hook-and-loop closures, or other non-limiting equivalents. In some implementations, the activation mechanism  780  may comprise a doorbell. 
     In some embodiments, the door  705 ,  706  may slide into and out from the door frame  720 ,  721 . The door  705 ,  706  may slide either horizontally or vertically. In some implementations, the door  705 ,  706  may be adjustable within the door frame  720 ,  721  to be able to slide both horizontally or vertically, depending on which mode is in use. In some aspects, the door fixture  711 ,  712  may secure the door  705 ,  706  in an open or closed position by coupling to opposite ends of the door frame  720 ,  721 . This may allow the door  705 ,  706  to be secured in a preferred position based on the needs of the pet owner and the pet using the door  705 ,  706 . 
     In some embodiments, the door  706  and the door frame  721  may comprise magnets  770  that couple together when the door  706  is in a partial or maximally open position. These magnets  770  may secure the door  706  in place, so the door  706  does not close on a pet travelling through. In other implementations, the door frame  721  may comprise an activation mechanism  780 . In some aspects, the activation mechanism  780  may comprise a doorbell. The pet may be trained to use the activation mechanism  780 , allowing the door  706  to be operated semi-automatically in response to the pet&#39;s stimulus. 
     Referring now to  FIGS. 8A-B , an exemplary pet door  800  is illustrated. In some embodiments, the pet door  800  may comprise a door  805 . In some aspects, the pet door  800  may comprise a knob  810 . In some implementations, the pet door  800  may comprise one or more windows  815 . In some embodiments, the pet door  800  may comprise a frame  820 . In some aspects, the pet door may comprise a hinge  830 . In some implementations, the hinge  830  may be arranged on the door  805  and the frame  820  so that the door  805  flips open either vertically or horizontally. In some embodiments, the pet door  800  may interface with an interior or exterior household door, such as a cabinet door as a non-limiting example. 
     Current solutions for pet doors are limited to certain types of doors or walls. The ability of the pet door  800  to interface with any household barrier or surface, including a kitchen cabinet  890 , as a non-limiting example, allows the pet door  800  to be used universally throughout a pet owner&#39;s home. The customizable orientation of the frame  820  and hinge  830  also provide more options to pet owners to serve a variety of spaces and décor. 
     In some aspects, the knob  810  may twist in order for the pet door  800  to be opened. In a closed position, the knob  810  may interact with an interior or exterior locking mechanism to secure the door  805  in the closed position. In some embodiments, twisting the knob  810  for a certain number of degrees may secure the door  805  in a plurality of positions between a fully closed and a fully opened position, including the fully opened position. For example, the knob  810  may pair with an interior knob  811 . When twisted, the interior knob  811  may lock the door  805  in a fully opened position. This would allow for safe passage of the pet through the door  805  without clipping a tail or catching any fur, which may cause undue pain to the pet if these things occurred. 
     Referring now to  FIG. 9 , an exemplary pet door  900  is illustrated. In some implementations, the pet door  900  may be installed on an interior or exterior household door, such as a sliding or pocket door  990 , as a non-limiting example. In some aspects, the pet door  900  may comprise a door  905  and a knob  910 . In some embodiments, the pet door  900  may comprise one or more windows  915 , a frame  920 , and a hinge  905 . In some implementations, the pet door  900  may be completely flush to the paired household door, in order to allow the existing household door to function properly. For example, the ability for the pet door  900  to be installed in a way in which the door  905  and frame  920  are completely flush with the sliding or pocket door  990  allows pet owners to install the pet door  900  in places otherwise previously unable to utilize a pet door. 
     Referring now to  FIG. 10 , an exemplary revolving pet door  1000  is illustrated. In some aspects, the revolving pet door  1000  may comprise a door  1005 , a plurality of windows  1015 , a frame  1020 , and an axis  1030 . When force is applied, the door  1005  may revolve about the axis  1030  within the frame  1020 . In some embodiments, the door  1005  and the frame  1020  may comprise paired magnets  1070  so the door  1005  may be secured in a completely closed position when not in use. The secured door  1005  allows the pet owner to control traffic flow of their pet or pets through the pet door  1000 . For example, if the pet owner has guests over, they might not want their pet to travel through an interior or exterior pet door  1000  for security and sanitation purposes. The ability to secure the pet door in a closed position allows pet owners the ability to enable their pets to use the pet door  1000  as they prefer and need. 
     In some implementations, the door  1005  may revolve about the axis  1030  in one or more directions. In some aspects, the revolving pet door  1000  may be installed in a panel accompanying an interior or exterior household door or on the interior or exterior household door, itself. As a non-limiting example, the revolving pet door  1000  may be installed in a panel  1090  beside an exterior sliding glass door. The panel  1090  may allow for a secure seal with a sliding glass door without requiring cutting into the glass of the window. This installation method enables a pet owner to utilize the pet door  1000  in multiple scenarios, such as when they would like to install the pet door  1000  near a glass door in their home. 
     For example, it may be overly expensive and unreasonable to carve a hole in an existing glass door, or order a custom glass door to accommodate a pet entryway. The pet door  1000  enables simplified installation of a pet entryway near a specialty home door, such as a sliding glass, without disrupting the present configuration in a pet owner&#39;s home. 
     Referring now to  FIGS. 11A-D , exemplary pet door  1100 ,  1101 ,  1102 ,  1103  are shown. In some embodiments, the pet door  1100 ,  1101 ,  1102 ,  1103  may comprise a door  1105 ,  1106 ,  1107 ,  1108 . In some implementations, the pet door  1100 ,  1101 ,  1102 ,  1103  may comprise a knob  1110 . In some aspects, the pet door  1100 ,  1101 ,  1102 ,  1103  may comprise one or more windows  1115 . In some embodiments, the pet door  1100 ,  1101 ,  1102 ,  1103  may comprise a frame  1120 . 
     In some implementations, the pet door  1100 ,  1101 ,  1102 , and  1103  may comprise a hinge  1130 . The pet door  1100  may detach from the hinge  1130  and be interchangeable within the frame with pet doors  1101 ,  1102 ,  1103 . This may allow for pet owners to customize the appearance of the pet door  1100 ,  1101 ,  1102 ,  1103 , such as in response to changing holiday seasons, as a non-limiting example. 
     For example, pet door  1100 ,  1101  may comprise an appearance similar to that of a standard household door and an interchangeable pet door  1102 ,  1103  may comprise an appearance relating to a particular season or holiday. The pet owner may choose to replace pet door  1100 ,  1101  with either  1102 ,  1103  or some other non-limiting embodiment so that the pet door  1102 ,  1103  coincides with the present season or holiday. 
     Referring now to  FIGS. 12A-B , an exemplary pet door  1200  is shown. The pet door  1200  may comprise a door  1205 , a knob  1210 , a plurality of windows  1215 , a frame  1220 , and a hinge  1230 . In some implementations, the pet door  1200  may comprise a sensor  1295 . This sensor may use a sensing technology, such as motion, infrared, temperature, or other non-limiting equivalent, to detect the presence of a pet. In some embodiments, the sensor  1295  may open the door  1205  so the pet may pass through. 
     In some aspects, the sensor  1295  may also be also to sense once a pet has passed through the door, and after a predetermined or manually-programmed time period, the sensor  1295  may close the door  1205 . This would allow the pet door  1200  to operate the door  1205  semi-automatically in response to a predetermined stimulus. 
     In some implementations, the pet door  1200  may pair with an external device  1297 , such as a doormat, that communicates with the sensor  1295 , via a logical communication such as Bluetooth, so that when a pet applies pressure to the external device  1297 , the sensor  1295  receives a signal to open the door  1205 . Once the pet has relieved pressure from the external device  1297 , after a predetermined or pet owner-programmed time period, the external device  1297  may communicate with the sensor  1295 , which in turn may close the door  1205 . Having the ability to program the time period during which the pet door  1200  may be opened, or the time it would take to open or close after being prompted by the pet owner, enables the pet door  1200  to operate semi-automatically. 
     In some implementations, the external device  1297  may be programmable to accept a certain threshold of pressure to communicate with the sensor  1295 . For example, if the pet weighs 10 pounds, the pet owner may program the external device  1297  to trigger the sensor  1295  when at least 2 pounds of pressure is applied to the external device  1297 . 
     In some aspects, the sensor  1295  may operate in tandem and separately from the external device  1297 . As non-limiting examples, the sensor  1295  may detect motion or utilize infrared technology in addition to receiving logical communication from the external device  1297  in order to open the door  1205 . This would enable the pet door  1200  to open or close based on sensing the presence of a pet, or in response to a combination of stimulus provided by a trained pet, in order for the pet door  1200  to operate semi-automatically. 
     In some embodiments, the sensor  1295  may also act as an attraction mechanism, drawing pets to the location of the door so that the pets may, over time, learn where the door is located and how to travel through it. This attraction mechanism may comprise a blinking light, a specialized sound emitter, or some other non-limiting equivalent that would attract, and not deter, a pet. For example, a trained pet could learn to trigger the pet door  1200  to open and close, and in response the pet door  1200  may react semi-automatically depending on the stimulus. 
     In some implementations, the sensor  1295  may comprise a camera and a radio-frequency, Bluetooth, or another non-limiting signal that allows the pet door  1200  to communicate with a mobile device, such as a cell phone. The pet owner may download an application onto the cell phone for use with the pet door  1200 . In some aspects, the sensor  1295  may sense the arrival or departure of a pet, inform the pet owner via the cell phone application, and allow the pet owner to remotely open or close the door  1205 , accordingly. This may enable semi-automatic operation of the pet door  1200  via a smartphone application, motion or presence of a pet, a stimulus executed by a trained pet, and other combination of non-limiting equivalent examples. 
     Referring now to  FIG. 13 , a front view of an exemplary pet door  1300  is illustrated. In some embodiments, a pet door  1300  may comprise double doors  1305  that may open by a hinge  1330 . In some aspects, a pet door  1300  may comprise windows  1315  and door knobs  1310 . In some implementations, the windows  1315  may be decorative, such as where they may not be transparent. In some embodiments, double doors  1305  may be nested into an outer frame  1320 , wherein the outer frame  1320  may be at least partially embedded into a surface, such as a door or wall. In some implementations, double doors  1305  may have a locking mechanism wherein the door may lock once both are closed together, such as illustrated in  FIGS. 14A-14D . 
     Referring now to  FIGS. 14A-C , an exemplary locking mechanism  1400  in an unlocked position. Referring now to  FIG. 14D , an exemplary locking mechanism  1400  in a locked position is illustrated. In some embodiments, a locking mechanism  1400  may comprise a latching mechanism  1410  and a positioning mechanism  1405 . In some implementations, the positioning mechanism  1405  may limit the rotation of the latching mechanism  1410  to prevent or allow for locking. In some aspects, the positioning mechanism  1405  may be lifted to allow for the rotation of the latching mechanism  1410  onto the adjacent knob. In some embodiments, a locking mechanism  1400  may allow for locking of double doors, such as illustrated, or locking of a door to a door frame, not illustrated. 
     CONCLUSION 
     A number of embodiments of the present disclosure have been described. While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any disclosures or of what may be claimed, but rather as descriptions of features specific to particular embodiments of the present disclosure. 
     Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination or in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in combination in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or variation of a sub-combination. 
     Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. 
     Moreover, the separation of various system components in the embodiments described above should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single product or packaged into multiple products. 
     Thus, particular embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order show, or sequential order, to achieve desirable results. In certain implementations, multitasking and parallel processing may be advantageous. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the claimed disclosure.