Patent Description:
Hinge assemblies are used on appliances to couple doors with cabinets. Often these hinge assemblies have various coupling assemblies for coupling components of the hinge assembly with a body of the appliance and/or the door.

Document <CIT> discloses an adjustable appliance hinge receiver includes a base including spaced-apart first and second lateral walls. A slide body is slidably connected to the base and located between the lateral walls. The slide body slides relative to the base along an adjustment axis. At least one hinge mounting structure is connected to the slide body and is adapted to be engaged by an associated hinge. An adjustment system includes a first inclined ramp connected to the slide body and an adjustment shaft that extends between and that is rotatably supported by the first and second lateral walls of the base. The adjustment shaft is rotatable relative to the base about an axis of rotation. The adjustment system also includes an adjustment member engaged with the adjustment shaft and selectively movable along the axis of rotation in opposite first and second directions in response to rotational movement of the adjustment shaft in opposite first and second rotational directions such that rotation of the adjustment shaft in one of the first and second rotational directions causes the adjustment member to bear against the first ramp and induce sliding movement of the slide body relative to the base along the adjustment axis.

Document <CIT> discloses a hinge assembly includes a claw and a body pivotally connected to the claw and movable to and between a first operative position and a second operative position. A link assembly operably interconnects the claw and the body. The link assembly includes at least one link pivotally connected to the claw and a spring connected between the link and an anchor point. A latch is movably connected to the claw, and the latch is movable to and between a locked position where it is adapted to engage an associated mounting receptacle to prevent separation of the claw from the mounting receptacle, and an unlocked position. The hinge assembly can be provided as part of a door mounting system that also includes a mating mounting receptacle.

Document <CIT> discloses a hinge assembly for an associated appliance door includes an arm and a lever pivotally connected to the arm. The lever and arm are adapted to pivot relative to each other about a main pivot axis between a first position that corresponds to a closed position of the associated appliance door and a second position that corresponds to an opened position of the associated appliance door. A slide link is located adjacent the lever. A damper engagement structure is connected to the slide link. A biasing system urges the arm and lever toward the first position. A damper system includes a damper that damps pivoting movement between the arm and the lever for at least part of the movement between the arm and the lever when the arm and lever pivot relative to each other from the first position toward the second position.

Document <CIT> discloses a home appliance having an adjustable door and including an appliance body defining a cavity therein, defining an access opening to the cavity and carrying the door, with the door being movable between a generally vertical covering relationship with the access opening and a generally horizontal open relationship with the access opening; and at least one hinge assembly operatively associated with the door, the hinge assembly including an adjustable hinge receiver and a claw mounted to the hinge receiver and the door to extend therebetween, the hinge receiver including an adjustment assembly operatively connected to the claw for at least one of raising the door and lowering the door with respect to the appliance body, the adjustment assembly including a user-accessible adjustment member, wherein the adjustment member and the claw are in general vertical alignment and the adjustment member is disposed above the claw.

The present illustrated embodiments reside primarily in combinations apparatus components related to a hinge assembly for an appliance door. Accordingly, the apparatus components have been represented, where appropriate, by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein. Further, like numerals in the description and drawings represent like elements.

Referring to <FIG>, reference numeral <NUM> generally designates an appliance including an appliance body <NUM>. The appliance body <NUM> includes a front panel <NUM> defining a connector slot <NUM>. A hinge receiver <NUM> is coupled with the appliance body <NUM> and has first and second opposing side walls <NUM>, <NUM>. The first and second side walls <NUM>, <NUM> define a receiving space <NUM> therebetween. The hinge receiver <NUM> includes a first striker <NUM> positioned above a second striker <NUM>, and the first and second strikers <NUM>, <NUM> are aligned with the connector slot <NUM>. A hinge arm assembly <NUM> includes a hinge arm <NUM> configured to engage with the second striker <NUM>. A latch cam <NUM> is hingedly coupled with the hinge arm <NUM> and is movable between an engaged position and a disengaged position. A top surface <NUM> of the latch cam <NUM> contacts the first striker <NUM> when the latch cam <NUM> is in the engaged position. A door <NUM> is rotatably coupled with the appliance body <NUM> by the hinge receiver <NUM> and the hinge arm assembly <NUM>. The door <NUM> is rotatable about a door axis X and movable between open and closed positions.

Referring now to <FIG> and <FIG>, the appliance <NUM> is illustrated including the appliance body <NUM> with a liner <NUM> defining a cavity <NUM>. The liner <NUM> is coupled with the front panel <NUM> of the appliance body <NUM>, and the front panel <NUM> defines an access opening <NUM> in communication with the cavity <NUM>. The front panel <NUM> further defines a pair of connector slots <NUM> positioned on opposing sides of the opening <NUM>. Each connector slot <NUM> may be elongated and may extend parallel to side walls of the liner <NUM>. Each connector slot <NUM> is configured to at least partially receive one of a pair of hinge assemblies <NUM>, as discussed in more detail elsewhere herein. It will be understood that the appliance body <NUM> may further include components typically found in a conventional cooking oven, such as an outer casing, electrical components, heating elements, gas lines, valves, control units, burner elements, broiled elements, and the like. Such components will not be described further herein except where necessary for a complete understanding of the aspects of the present disclosure.

Referring now to <FIG>, an exemplary form of the door <NUM> is illustrated configured to be coupled with the appliance body <NUM> by a pair of hinge assemblies <NUM>. The door <NUM> is configured to selectively seal the cavity <NUM> and is movable between open and closed positions. When the door <NUM> is in the open position, the cavity <NUM> is accessible through the opening <NUM> defined by a front panel <NUM> of the appliance body <NUM>. The door <NUM> includes a front door panel <NUM> and a rear door panel <NUM> in a spaced apart configuration to define a space therebetween. A handle <NUM> is coupled with the front door panel <NUM> and configured to move the door <NUM> between the open position and the closed position. It will be understood that the door <NUM> may include any number of panels without departing from the scope of the present disclosure. While the door <NUM> is illustrated as being configured to be coupled to the appliance body <NUM> by a pair of hinge assemblies <NUM>, for the remainder of the disclosure, only one of the hinge assemblies <NUM> is described in detail, and it will be further understood that each of the pair of hinge assemblies <NUM> is formed in the same or a similar way with the same components.

As shown in <FIG>, the hinge assembly <NUM> includes a hinge receiver <NUM> and a hinge arm assembly <NUM>. The hinge receiver <NUM> is positioned proximate the respective connector slot <NUM> and is configured to be engaged with the hinge arm assembly <NUM> to operably couple the door <NUM> with the appliance body <NUM>. The hinge arm assembly <NUM> is coupled with the door <NUM> and includes the hinge arm <NUM> configured to be engaged with the respective hinge receiver <NUM> and the latch cam <NUM> configured to be positioned within and/or through the connector slot <NUM>.

Referring now to <FIG> and <FIG>, the hinge receiver <NUM> is coupled with the front panel <NUM> and is positioned to at least partially align with the connector slot <NUM>. The hinge receiver <NUM> is generally elongated and includes first and second side walls <NUM>, <NUM> positioned on opposing sides of the respective connector slot <NUM>. The first and second side walls <NUM>, <NUM> define a receiving space <NUM> therebetween configured to be in communication with the connector slot <NUM> and at least partially receive the hinge arm <NUM> of the hinge arm assembly <NUM>.

As best shown in <FIG>, the hinge receiver <NUM> may include a front wall <NUM> extending between the first and second side walls <NUM>, <NUM>. In various examples, the front wall <NUM> may be integrally formed with one or both of the first and second side walls <NUM>, <NUM>. As illustrated, the front wall <NUM> includes an upper portion <NUM> located at a top of the hinge receiver <NUM>, a central portion <NUM>, and a lower portion <NUM> located at bottom portion of the hinge receiver <NUM> and spaced apart from the central portion <NUM>. Each of the upper and lower portions <NUM>, <NUM> may be configured to be coupled with the front panel <NUM> of the appliance body <NUM> by one or more fasteners <NUM>. The front wall <NUM> may extend along the entirety of the length of the side walls <NUM>, <NUM> or along a portion of the length of the side walls <NUM>, <NUM>. In various examples, the upper portion <NUM> and/or the lower portion <NUM> may be integrally formed with the central portion <NUM>. In other examples, the upper portion <NUM> and/or the lower portion <NUM> may be spaced apart from the central portion <NUM>.

Referring now to <FIG> and <FIG>, the first side wall <NUM> includes a protrusion <NUM> extending into the receiving space <NUM>. The protrusion <NUM> is positioned proximate a front edge of the first side wall <NUM> and has a vertical portion <NUM> and an inclined portion <NUM>. The vertical portion <NUM> is spaced apart from the side wall <NUM>, and the inclined portion <NUM> is inclined inward from the side wall <NUM> toward the vertical portion <NUM>. As discussed in more detail elsewhere herein, the protrusion <NUM> may be configured to at least partially retain the hinge arm <NUM> within the receiving space <NUM> of the hinge receiver <NUM> and/or guide engagement of the hinge arm <NUM> into engagement with the hinge receiver <NUM>. It is contemplated that each of the first and second side walls <NUM>, <NUM> may include a respective protrusion <NUM>. It is further contemplated that the protrusions <NUM> of the opposing side walls <NUM>, <NUM> may be vertically aligned such that the width of the receiving space <NUM> defined between the first and second side walls <NUM>, <NUM> is reduced between the protrusions <NUM>.

With continued reference to <FIG> and <FIG>, the first and second strikers <NUM>, <NUM> are coupled with and extend between the first and second side walls <NUM>, <NUM> of the hinge receiver <NUM>. The first striker <NUM> may be positioned above the protrusion <NUM> of the first side wall <NUM>, and the second striker <NUM> may be positioned rearward of the first striker <NUM> and the protrusion <NUM>. The second striker <NUM> is further positioned below the first striker <NUM> such that the first striker <NUM> is vertically and horizontally offset from the second striker <NUM>. In other words, the first striker <NUM> is positioned forward and upward from the second striker <NUM>.

As previously introduced, the hinge arm assembly <NUM> includes the hinge arm <NUM> and the latch cam <NUM> configured to engage with the hinge receiver <NUM>. A hinge body <NUM> of the hinge arm assembly <NUM> is fixedly coupled with the door <NUM>. For example, the hinge body <NUM> may be coupled with one of the door panels <NUM>, <NUM>. The hinge body <NUM> may alternatively be coupled with a door support <NUM> between the door panels <NUM>, <NUM> or along an edge of the door <NUM>. The hinge body <NUM> is generally elongated and extends along a portion of the door <NUM> to rotate the door <NUM> between the open and closed positions. It is contemplated that the hinge body <NUM> may be at least partially positioned between the door panels <NUM>, <NUM>. It is further contemplated that the hinge body <NUM> may be integrally formed with the door support <NUM> or may be formed as the door support <NUM>.

Referring now to <FIG> and <FIG>, the hinge body <NUM> is rotatably coupled with the hinge arm <NUM>. As best shown in <FIG>, the hinge arm <NUM> includes a door engagement portion <NUM>. The door engagement portion <NUM> of the hinge arm <NUM> defines a door pin receiving well <NUM> configured to receive a door pin <NUM>, as discussed in more detail elsewhere herein. The door pin <NUM> may be a fastener (e.g., a pin, a screw, a bolt, etc.) configured to couple the hinge body <NUM> with the hinge arm <NUM>. The door axis X extends through a center of the door pin <NUM>, as best shown in <FIG> and <FIG>, such that rotation of the hinge body <NUM> about the door pin <NUM> moves the door <NUM> between the open and closed positions about the door axis X.

Referring again to <FIG>, the hinge arm <NUM> is configured to be received by the connector slot <NUM> and extend into the receiving space <NUM> of the hinge receiver <NUM>. As best shown in <FIG>, the hinge arm <NUM> includes a body <NUM> defining an aperture <NUM>. The aperture <NUM> is configured to receive a pin <NUM> configured to couple the latch cam <NUM> with the hinge arm <NUM>. The pin <NUM> is configured such that the latch cam <NUM> is movable relative to the hinge arm <NUM> between engaged and disengaged positions.

Referring now to <FIG>, as previously introduced, the hinge arm <NUM> includes a door engagement portion <NUM> extending from one side of the body <NUM>. The hinge arm <NUM> further includes a coupling flange <NUM> extending from the body <NUM> in a direction generally opposite that of the door engagement portion <NUM>. The coupling flange <NUM> is configured to be inserted through the connector slot <NUM> and into the receiving space <NUM> of the hinge receiver <NUM> (see <FIG> and <FIG>). The coupling flange <NUM> defines a striker receiving space <NUM> configured to at least partially receive the second striker <NUM> of the hinge receiver <NUM>, as described in more detail below.

As shown in <FIG>, the coupling flange <NUM> is at least partially spaced apart from the body <NUM> of the hinge arm <NUM> by a slot <NUM>. In other words, the hinge arm <NUM> defines a slot <NUM>. The slot <NUM> is defined to extend vertically between the coupling flange <NUM> and the hinge arm <NUM> and is configured to receive a lower internal edge <NUM> of the front panel <NUM> when the hinge arm <NUM> is positioned through the connector slot <NUM> (see <FIG> and <FIG>). The engagement between the lower internal edge <NUM> and the slot <NUM> may be configured to increase the retention of the hinge arm <NUM> within the hinge receiver <NUM>.

Referring again to <FIG> and <FIG>, the coupling flange <NUM> also includes a stop <NUM> extending outward from a side of the hinge arm <NUM>. The stop <NUM> includes an abutment portion <NUM> and a tapered portion <NUM>. The abutment portion <NUM> may be generally oblong or round or may have any other shape. The abutment portion <NUM> may be configured to be substantially planar or may be rounded. The tapered portion <NUM> extends from the abutment portion <NUM> toward the striker receiving space <NUM> and is tapered away from the abutment portion <NUM>. As illustrated, the stop <NUM> may be shaped such that the tapered portion <NUM> is tapered inward toward a point and tapered downward from the abutment portion <NUM> to the surface of the hinge arm <NUM>.

As best shown in <FIG>, the stop <NUM> is configured to abut the protrusion <NUM> of the hinge receiver <NUM> when the hinge arm <NUM> is engaged with the hinge receiver <NUM>. The tapered portion <NUM> allows the stop <NUM> to be positioned to contact the vertical portion <NUM> of the protrusion <NUM> of the hinge receiver <NUM>. It is contemplated that the coupling flange <NUM> may have stops <NUM> on both sides of the hinge arm <NUM> such that the stops <NUM> engage with the protrusions <NUM> of each side wall <NUM>, <NUM> of the hinge receiver <NUM>.

Referring now to <FIG>, the latch cam <NUM> is rotatably coupled with the hinge arm <NUM> and includes a body portion <NUM> and a coupling portion <NUM>. The coupling portion <NUM> extends from the body portion <NUM> and defines a receiving well <NUM>. When the latch cam <NUM> is coupled with the hinge arm <NUM>, the receiving well <NUM> is aligned with the aperture <NUM> of the hinge arm <NUM>. The aperture <NUM> and the receiving well <NUM> are configured to receive the pin <NUM> such that the latch cam <NUM> is rotatable about the pin <NUM> relative to the hinge arm <NUM>. The coupling portion <NUM> may extend from the body portion <NUM> such that the coupling portion <NUM> and the body portion <NUM> define a space <NUM> configured to at least partially receive the protrusion <NUM> of the hinge receiver <NUM> and the stop <NUM> of the hinge arm <NUM> when the latch cam <NUM> is in the engaged position.

Referring now to <FIG> and <FIG>, the latch cam <NUM> further includes an upper edge <NUM> extending between a front edge <NUM> and a rear edge <NUM>. The front edge <NUM> of the latch cam <NUM> extends along the body portion <NUM> and the coupling portion <NUM>. As previously introduced, the upper edge <NUM> includes the top surface <NUM> of the latch cam <NUM>. The upper edge <NUM> may be non-linear such that the body portion <NUM> is more narrow proximate the rear edge <NUM> than proximate the front edge <NUM>. In various examples, material may be added to the latch cam <NUM> proximate the rear edge <NUM> to shift the center of gravity of the latch cam <NUM> to retain the latch cam <NUM> in the engaged position.

The front edge <NUM> of the latch cam <NUM> further includes a tab <NUM> extending outward from the latch cam <NUM>. The tab <NUM> defines a notch <NUM> configured to be used as a pull tab to move the latch cam <NUM> from the engaged position to the disengaged position to remove the hinge arm assembly <NUM> from engagement with the hinge receiver <NUM>, as discussed in more detail elsewhere herein. The tab <NUM> may be generally rounded and may define the notch <NUM> to receiver a user's finger, a standard tool, or any other mechanism for applying a pulling force F (see <FIG>) to the latch cam <NUM>. The tab <NUM> of the latch cam <NUM> may further be configured to allow the latch cam <NUM> to be moved between the engaged and disengaged positions without a specialized tool.

As shown in <FIG>, the hinge arm <NUM> is inserted into the receiving space <NUM> of the hinge receiver <NUM> proximate the first and second strikers <NUM>, <NUM> (see arrow A). The coupling flange <NUM> is aligned with the second striker <NUM>, and the striker receiving space <NUM> is configured to receive the second striker <NUM>. As shown in <FIG> and <FIG>, when the coupling flange <NUM> is inserted into the receiving space <NUM>, the lower internal edge of the hinge receiver <NUM> is received by the slot <NUM> and may be configured to retain the hinge arm <NUM> in engagement with the hinge receiver <NUM>. The latch cam <NUM> is then rotated (see arrow B of <FIG>) from the disengaged position (<FIG>) to the engaged position (<FIG>).

As best shown in <FIG>, when the latch cam <NUM> is in the engaged position, the top surface <NUM> of the upper edge <NUM> is configured to abut the first striker <NUM>. When the latch cam <NUM> is rotated from the disengaged position to the engaged position, the top surface <NUM> of the upper edge <NUM> slides under the first striker <NUM>. The engagement of the first striker <NUM> with the top surface <NUM> is configured to at least partially retain the latch cam <NUM> in the engaged position. The non-linear shape of the upper edge <NUM> and the top surface <NUM> of the latch cam <NUM> may further be configured to provide a self-guided engagement of the latch cam <NUM>, and the hinge arm assembly <NUM>, with the hinge receiver <NUM>. As previously discussed, the latch cam <NUM> may be configured to position a center of gravity of the latch cam <NUM> to maintain the engagement between the latch cam <NUM> and the hinge receiver <NUM> to prevent inadvertent release of the latch cam <NUM>.

The use of the hinge assembly <NUM> including the hinge receiver <NUM> and the hinge arm assembly <NUM> provides contact between the latch cam <NUM> and the first striker <NUM>. The contact between the latch cam <NUM> and the first striker <NUM> may be configured to maintain engagement between the hinge receiver <NUM> and the hinge arm assembly <NUM>. For example, the contact may be configured to prevent lifting of the hinge arm <NUM> in the connector slot <NUM> when the door <NUM> is moved from the open position to the closed position.

According to the invention, an appliance includes an appliance body having a front panel defining a connector slot. A hinge receiver is coupled with the appliance body and has opposing side walls defining a receiving space therebetween. The hinge receiver includes a first striker positioned above a second striker. The first and second strikers are aligned with the connector slot. A hinge arm assembly includes a hinge arm configured to engage with the second striker and a latch cam hingedly coupled with the hinge arm. The latch cam is movable between an engaged position and a disengaged position, and a top surface of the latch cam abuts the first striker in the engaged position. A door is rotatably coupled with the appliance body by the hinge receiver and the hinge assembly and is rotatable about a door axis between open and closed positions. The hinge arm includes a coupling flange extending from a body of the hinge arm in a direction generally opposite that of a door engagement portion of the hinge arm. The hinge receiver comprises a protrusion extending into the receiving space, wherein the protrusion is positioned proximate a front edge of one of the opposing side walls and has a vertical portion and an inclined portion. The coupling flange includes a stop extending outward from a side of the hinge arm, wherein the stop includes an abutment portion and a tapered portion. The stop is configured to abut the protrusion when the hinge arm is engaged with the hinge receiver and the tapered portion allows the stop to be positioned to contact the vertical portion of the protrusion.

According to an aspect, a first striker is offset from a second striker.

According to another aspect, a latch cam is weighted to prevent inadvertent movement of the latch cam from an engaged position to a disengaged position.

According to another aspect, a hinge body is coupled with a door and is rotatably coupled with a hinge arm by a fastener, and a door axis extends through the fastener. Further, the hinge arm includes a door engagement portion that defines a door pin receiving well configured to receive the fastener.

According to another aspect, a latch cam includes a tab configured to receive a pulling force to move the latch cam from an engaged position to a disengaged position.

According to another aspect, a hinge receiver includes a lower internal edge proximate at least one of first and second strikers.

According to another aspect, a hinge arm defines a slot configured to receive a lower internal edge of a hinge receiver.

According to another aspect, at least a portion of the hinge arm assembly is received within the receiving space.

According to another aspect, the hinge body is generally elongated and extends along a portion of the door to rotate the door between the open and closed positions.

According to another unclaimed aspect, an appliance includes an appliance body having a front panel defining a connector slot. A hinge receiver is coupled with the front panel and includes first and second strikers aligned with the connector slot. The first striker is positioned above and forward of the second striker. A door is coupled with the appliance body and is movable between open and closed positions. A hinge body is coupled with the door, and a hinge arm is coupled with the hinge body and configured to engage with the second striker. A latch cam is operably coupled with the hinge arm and is movable between an engaged position and a disengaged position. A top surface of the latch cam abuts the first striker in the engaged position.

According to another unclaimed aspect, a latch cam includes a body having a front edge and a rear edge and is gravity biased toward the rear edge in an engaged position.

According to another unclaimed aspect, a latch cam includes a tab configured to receive a pulling force to move the latch cam from an engaged position to a disengaged position.

According to another unclaimed aspect, a hinge arm defines a slot configured to receive a lower internal edge of a hinge receiver.

According to another unclaimed aspect, a hinge arm defines a receiving space configured to at least partially receive a second striker.

According to another unclaimed aspect, a hinge arm includes a stop tapered toward a receiving space of the hinge arm.

According to another unclaimed aspect, a hinge receiver includes a side wall having a protrusion configured to contact a stop when a second striker is received by a receiving space of a hinge arm.

According to another unclaimed aspect, a hinge assembly for an appliance includes a hinge receiver including first and second strikers. The first striker is positioned above and forward of the second striker. A hinge arm defines a receiving space configured to receive the second striker. A hinge body is rotatably coupled with the hinge arm, and a latch cam is operably coupled with the hinge arm. The latch cam is movable between an engaged position and a disengaged position. A top surface of the latch cam abuts the first striker in the engaged position.

According to another unclaimed aspect, a top surface of a latch cam extends along a non-linear upper edge.

According to another unclaimed aspect, a latch cam includes a tab extending forward of the latch cam.

According to another unclaimed aspect, a hinge arm includes a stop having a first portion tapered away from a second portion.

According to another unclaimed aspect, a hinge receiver includes a side wall having a protrusion configured to contact a second portion of a stop when a second striker is received by a hinge arm.

According to another unclaimed aspect, a hinge receiver is coupled with a front panel of an appliance body and is positioned to align first and second strikers with a connector opening of the front panel.

Claim 1:
An appliance (<NUM>) comprising:
an appliance body (<NUM>) including a front panel (<NUM>) defining a connector slot (<NUM>);
a hinge receiver (<NUM>) coupled with the appliance body (<NUM>) and having opposing side walls (<NUM>, <NUM>) defining a receiving space (<NUM>) therebetween, wherein the hinge receiver (<NUM>) includes a first striker (<NUM>) positioned above a second striker (<NUM>), and the first and second strikers (<NUM>, <NUM>) are aligned with the connector slot (<NUM>);
a hinge arm assembly (<NUM>) including a hinge arm (<NUM>) configured to engage with the second striker (<NUM>) and a latch cam (<NUM>) hingedly coupled with the hinge arm (<NUM>), wherein the latch cam (<NUM>) is movable between an engaged position and a disengaged position, and a top surface (<NUM>) of the latch cam (<NUM>) abuts the first striker (<NUM>) in the engaged position; and
a door (<NUM>) rotatably coupled with the appliance body (<NUM>) by the hinge receiver (<NUM>) and the hinge arm assembly (<NUM>), wherein the door (<NUM>) is rotatable about a door axis (X) between open and closed positions,
wherein the hinge arm (<NUM>) includes a coupling flange (<NUM>) extending from a body (<NUM>) of the hinge arm (<NUM>) in a direction generally opposite that of a door engagement portion (<NUM>) of the hinge arm (<NUM>), characterized in that the hinge receiver comprises a protrusion (<NUM>) extending into the receiving space (<NUM>),
wherein the protrusion (<NUM>) is positioned proximate a front edge of one of the opposing side walls (<NUM>) and has a vertical portion (<NUM>) and an inclined portion (<NUM>),
wherein the coupling flange (<NUM>) includes a stop (<NUM>) extending outward from a side of the hinge arm (<NUM>),
wherein the stop (<NUM>) includes an abutment portion (<NUM>) and a tapered portion (<NUM>),
wherein the stop (<NUM>) is configured to abut the protrusion (<NUM>) when the hinge arm (<NUM>) is engaged with the hinge receiver (<NUM>) and
wherein the tapered portion (<NUM>) allows the stop (<NUM>) to be positioned to contact the vertical portion (<NUM>) of the protrusion (<NUM>).