Abstract:
A method for compacting trash while in-flight includes moving a storage chamber into a chamber operating position within a dead space inaccessible from in front of a galley, securing the storage chamber in the chamber operating position, executing a compaction cycle, and removing the storage chamber into a chamber maintenance position in which compacted trash is removable from the storage chamber accessible from in front of the galley.

Description:
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS 
     This application is a divisional application of U.S. patent application Ser. No. 13/396,920, filed Feb. 15, 2012, now U.S. Pat. No. 8,490,543, which is a divisional application of U.S. patent application Ser. No. 12/793,788, filed Jun. 4, 2010, now U.S. Pat. No. 8,122,823, which claims the priority benefit of U.S. Provisional Application No. 61/184,480, filed Jun. 5, 2009, all of which are herein incorporated by reference and to all of which the priority benefit is claimed. 
    
    
     FIELD OF THE INVENTION 
     This invention generally relates to trash compactors. Specifically, the invention relates to trash compactors for use in vehicles such as an aircraft. 
     BACKGROUND 
     Often, commercial or private aircraft provide passengers and crew a galley or kitchen for food preparation and cleanup. Because of the limited physical space available for use on an aircraft, relatively little physical space may be allocated for use as a galley. Any galley equipment for food preparation or disposal must be designed to economize on the amount of space and weight used. In addition, such food preparation or disposal equipment must be safe and secure during operation in-flight. 
     Conventional aircraft trash compactors tend to use a large amount of space under the counter within the galley, thereby reducing the total volume of space available for stored food, or for devices for food storage, preparation or disposal. 
     SUMMARY 
     An embodiment of the invention provides a space-saving in-flight trash compactor, that may include a compactor mechanism and a storage chamber, which are adapted for easy positioning within an otherwise unused (or “dead”) space in an aircraft galley. In an embodiment, either or both of the compactor mechanism and storage chamber are rotatably attached to an axle positioned below a compactor mechanism and a trash chute for swiveling around the axle to permit ease of access while removing trash from the storage chamber. In accordance with various embodiments of the invention, and as shown in  FIG. 5 , only a single trolley or cart  441  (typically, with width of approximately twelve inches) needs to be removed from the space adjacent to the dead space in the aircraft galley for emptying the storage chamber. Optionally, the compactor mechanism is mounted to either the same or a separate axle, permitting ease of access to the compactor mechanism during maintenance. 
     In some embodiments, the storage chamber is mounted on castors alone without also being rotatably attached to an axle. In still other embodiments, the storage chamber is secured to a load-bearing plate. The load-bearing plate, in turn, is slidably attached to rails that permit an easy range of motion between operating and trash removal positions. In embodiments in which the storage chamber is secured to a load-bearing plate, an actuator or actuators may be used to aid in moving the storage chamber between operating and trash removal positions. 
     To permit trash to be deposited from above, a trash chute and a chute interface may be formed into the storage chamber. Trash deposited in the chute is channeled by the chute to the chute interface, and by the chute interface into the main portion of the storage chamber. Optionally, the trash chute includes a flap or covering either at an end closest to the storage chamber or an end further away from the storage chamber. 
     Optionally, the storage chamber may also be attached to rotatable supports, such as castors or wheels. Such rotatable supports provide additional physical support to the storage chamber, especially during operation of the compactor, and do not interfere with the rotation of the storage chamber around the axle to which the storage chamber is rotatably attached. 
     The storage chamber optionally includes also one or more latches for securing the storage chamber in one or more positions. For example, a latch may be installed on the storage chamber to secure the storage chamber during operation of the compactor. 
     The trash compactor may be operated by direct or remote control. A remote control may be provided, for example, in a different physical location within the galley or even in a different crew area of the cabin. Optionally, the invention may be operated semi-automatically through use of a trash level sensor within the storage chamber in communication with the compactor mechanism. 
     According to an embodiment, there is provided a method for storing and compacting trash while in-flight, the method comprising the steps of: moving a storage chamber into a chamber operating position; securing the storage chamber in the chamber operating position; executing a compaction cycle; and removing the storage chamber into a chamber maintenance position. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a space-saving in-flight trash compactor rotated into a position for maintenance or trash removal, in accordance with an embodiment of the invention; 
         FIG. 2  shows a top view of the rotation of a compactor mechanism and storage chamber, in accordance with an embodiment of the invention; 
         FIG. 3  shows a perspective view of a trash chute, chute interface, storage chamber, and compactor mechanism, in accordance with an embodiment of the invention; 
         FIGS. 4A and 4B  show left and right configurations for left and right sides of an aircraft, in accordance with an embodiment of the invention; and 
         FIG. 5  shows a perspective view of an alternative embodiment comprising a side-loading chute. 
     
    
    
     DETAILED DESCRIPTION 
     The following examples further illustrate various embodiments of the invention. Referring to  FIG. 1 , there is shown an embodiment of the space-saving in-flight trash compactor  100  in which the storage chamber  120  and compactor mechanism  110  have been rotated around at least one axle  130  into a position for maintenance and/or removal of trash from the storage chamber. 
     As shown in the embodiment of  FIG. 1 , the trash compactor may be generally disposed underneath a workdeck  410 . Under-workdeck doors  430  are shown open, permitting rotation of compactor mechanism  110  and storage chamber  120  into positions no longer underneath workdeck  410 . As shown in the alternative embodiment of  FIG. 5 , the workdeck  410  may also cover trolleys or carts  441 ,  442 , and  443  without workdeck doors  430 . 
     Several additional aspects of the features are illustrated in  FIG. 1 . Storage chamber  120  further comprises a chute interface  125  formed into the body of the storage chamber  120 . The chute interface  125  is adapted to channel trash received from the trash chute  150  when the invention is in a position for operation. The chute interface  125  need not take the generally lip-shaped form shown in  FIG. 1 , but rather may be adapted to a different shape as necessary to interface with a trash chute  150 . Moreover, the trash chute  150  may take a different shape, such as a cylindrical or elliptical shape. 
     In other embodiments, storage chamber  120  does not include a chute interface  125 . In such embodiments, the chute  150  channels trash directly into the storage chamber  120 . In accordance with such embodiments, the chute  150  is designed with flaps in addition to flaps  155  for pressing trash into storage chamber  120  before a compaction cycle. In accordance with such embodiments, the chute  150  is designed to slide or collapse toward the storage chamber  120  to secure any trash in the storage chamber  120  before a compaction cycle. 
     In still other embodiments, neither a chute interface  125  nor a chute  150  are required.  FIG. 5  shows such an embodiment. Trash is loaded after flipping up a side-loading flap  555  into a space directly above cylindrical storage chamber  524 . A compactor mechanism  515  is disposed above the cylindrical storage chamber  524 . The user interface  510  shown in  FIG. 5  is used to start a compaction cycle. The user interface  510  may incorporate programmable logic or wireless components that permit for a delayed start of the compaction cycle, or remote activation. 
     Referring again to  FIG. 1 , latches  160  and  162  are shown. Latches  160  and  162  secure the compactor mechanism  110  and storage chamber  120  in position during operation. Latches may also be used to secure chute flaps  155  or  555  into place during takeoff and landing. 
     As illustrated, the embodiment of  FIG. 1  uses “dead space” otherwise inaccessible to galley devices. In several embodiments, this benefit is achieved through rotatable attachment of either or both of the compaction mechanism  110  and the storage chamber  120  to one or more axles  130  and  140  (not shown in  FIG. 1 ). As shown in an embodiment in  FIG. 2 , the storage chamber  120  is rotatably attached to axle  140  by hinge  164 . The storage chamber  120  is thus capable of swiveling or pivoting around axis  140 . In the embodiment shown in  FIG. 2 , the storage chamber  120  has rotated  180  degrees around axle  140  into a maintenance or trash removal position. As shown in  FIG. 2 , when the storage chamber is in an operating position (indicated by dashed lines), the chute interface  125  is positioned directly below the trash chute  150  and chute flaps  155 . Chute flaps  155  are provided to prevent trash from exiting the storage chamber suddenly during compaction. In the embodiment shown in  FIG. 1 , two chute flaps  155  are shown. In another embodiment, such as that shown in  FIG. 5 , a single flap  555  may be used. 
       FIG. 3  illustrates an embodiment of the invention in which the compactor mechanism  110  has been rotated into a maintenance position. The compactor mechanism  110  generally includes an actuator  115 , drive shaft  117 , and compactor plate  119 . The actuator  115  may be any actuator suitable for use with aircraft power (including both fixed and wild frequency AC power) that provides sufficient force for compaction. For example, a hydraulic pump, discharge pump, or other pump-driven mechanical actuator may be used as a mechanism for generating force behind the compaction plate  117 . Compaction plate  117  is adapted to press trash downwardly into the storage chamber  120  during operation. 
     In the embodiment of  FIG. 3  the compactor mechanism  110  is mounted to an upper axle  130  and the storage chamber  120  is mounted to a lower axle  140 . Hinges  164  and  166 ,  167  and  168  provide rotatable attachments to the upper and lower axles, respectively. In another embodiment, the compactor mechanism  110  and storage chamber  120  may be mounted to the same axle. 
       FIG. 3  also shows a rail  310  against which the base of the operating chamber remains flush during operation of the invention. In an embodiment, latch  160  is adapted to engage the rail  310  to secure the storage chamber  120  in position during operation. 
     In the embodiments shown in  FIGS. 1-4 , the storage chamber  120  has a rectangular footprint with a lip for the chute interface  125 . In other embodiments not shown, the storage chamber  120  does not include a chute interface  125 . In still other embodiments, such as that shown in  FIG. 5 , the cylindrical storage chamber  524  is disposed below a cylindrical chute  522 , with the diameter of the chamber  524  and chute  522  being equal. The storage chamber  120  need not have a generally rectangular footprint as shown, and may have a circular, elliptical, or other footprint. 
     In addition, in some embodiments, the storage chamber  120  is not mounted to a lower axle  140 . In such embodiments, the storage chamber may be movable in and out of operating position with castors alone, or with castors mounted to a load-bearing plate on which the storage chamber  120  rests. In other embodiments, the storage chamber may be secured to a load-bearing plate (not shown) mounted on rails for easy positioning of the storage chamber by crew. In such embodiments, one or more actuators may assist in positioning the storage chamber  120 . 
     During long-range flights, a flight attendant may easily access the storage chamber one or more times during the flight for changing of liners as necessary. 
     As illustrated in  FIG. 4A , in an embodiment, the storage chamber  120  may be supported by castors which roll on the floor as the storage chamber is pivoted on the axle  140 . In such an embodiment, the storage chamber  120  may be detachable from the axle  140  so that the storage chamber  120  may be rolled out from under the workdeck to provide easier access when changing liners. In addition, the castors may provide additional support if the storage chamber becomes heavy after it approaches capacity after several cycles of compaction.  FIGS. 4A and 4B  also illustrate right-hand and left-hand configurations of the trash compactor installed inn right-hand and left-hand symmetric aircraft galley configurations. 
       FIG. 5  shows another embodiment of the trash compactor comprising a side-loading chute flap  555 , which permits trash to be dropped directly into cylindrical storage chamber  524 .  FIG. 5  also shows the workdeck  410 , and two coffee makers  590  installed above the workdeck  410 . The leftmost trolley or cart  441  can be rolled out to permit the storage chamber  524  to swivel out into a maintenance position, thereby permitting trash removal. Shown for illustrative purposes only are coffee pots  590 , which might be installed in an aircraft galley. 
     A cutaway  530  in  FIG. 5  shows in the interior of the space below workdeck  410 . As shown in  FIG. 5 , the cylindrical storage chamber  524  is rotatably attached to axle  140  by hinges  167  and  168 . After a compaction cycle, a trolley or cart  441  is rolled out from underneath workdeck  410  to permit the cyclindrical storage chamber  524  to be emptied. 
     To begin a compaction cycle, several different mechanisms are used in various embodiments. In one embodiment, a locking mechanism on the trash chute door triggers the compaction cycle. In another embodiment, the compaction cycle is initiated from a dedicated remotely located panel that also contains a display device for indicating equipment status (operational, in-op, trash level, diagnostics, servicing, etc.). In still another embodiment, the compaction cycle is triggered from a central galley control interface that serves multiple functions, one of which is the TC mode which handles TC operation/status/diagnostics/servicing functions. In all cases, safety interlocks may be required before a compaction cycle begins. 
     All references, including publications, patent applications, and patents, cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein. 
     The use of the terms “a” and “an” and “the” and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention. 
     Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Of course, variations of those preferred embodiments will become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.