BACKGROUND OF THE INVENTION
Known refrigerators typically include insulated cabinets and one or more doors that are mounted to the cabinet by hinges. Known refrigerators may include adjustment devices to permit vertical adjustment of the door relative to the cabinet. However, known door adjustment arrangements may suffer from various drawbacks.
SUMMARY OF THE INVENTION
A refrigerator includes an insulated cabinet having an opening that provides access to an interior compartment and a first hinge structure. The refrigerator also includes a door having a second hinge structure that is movably connected to the first hinge structure. The door is configured to close off at least a portion of the opening when the door is in a closed position relative to the insulated cabinet. A height adjustment lever operably interconnects the first and second hinge structures. Movement of the lever in a first direction causes the door to move upwardly relative to the insulated cabinet, and movement of the lever in a second direction that is opposite to the first direction causes the door to move downwardly relative to the cabinet. A stop limits movement of the height adjustment lever in at least one of the first and second directions.
Another aspect of the present disclosure is a height adjustable hinge assembly for connecting a refrigerator door to an insulated refrigerator cabinet. The height adjustable hinge assembly includes a first hinge structure, and a second hinge structure that is pivotably connected to the first hinge structure. A height adjustment lever operably interconnects the first and second hinge structures. Movement of the lever in a first direction causes the door to move upwardly relative to the insulated cabinet, and movement of the lever in a second direction that is opposite to the first direction causes the door to move downwardly relative to the cabinet. A stop limits movement of the height adjustment lever in at least one of the first and second directions.
These and other features, advantages, and objects of the present disclosure will be further understood and appreciated by those skilled in the art by reference to the following specification, claims, and appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an isometric view of a refrigerator;
FIG. 2 is an isometric view of the refrigerator of FIG. 1;
FIG. 3 is an isometric view of a hinge structure and height adjustment lever;
FIG. 4 is a side elevational view of a hinge structure and height adjustment lever of FIG. 3;
FIG. 5 is an isometric view of the hinge structure and height adjustment arm of FIG. 3 showing a hinge bushing;
FIG. 6 is an exploded isometric view showing a height adjustment lever and two different types of hinge bushings;
FIG. 7 is a partially fragmentary view showing the buttress-type threads of the height adjustment lever;
FIG. 8 is a partially fragmentary cross sectional view showing a gravity closing bushing assembly; and
FIG. 9 is a partially fragmentary cross sectional view showing an auto closing bushing assembly.
DETAILED DESCRIPTION
For purposes of description herein, the terms “upper,” “lower,” “right,” “left,” “rear,” “front,” “vertical,” “horizontal,” and derivatives thereof shall relate to the disclosure as oriented in FIG. 1. However, it is to be understood that the disclosure may assume various alternative orientations and step sequences, except where expressly specified to the contrary. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification, are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
With reference to FIGS. 1 and 2, a refrigerator 1 includes an insulated cabinet 2 having one or more openings 4 and 6 that may be closed off by doors 8A and 8B, and 10, respectively. In the illustrated example, doors 8A and 8B are french doors that close off a single opening 4 providing access to a fresh food compartment 12. The door 10 may comprise a movable door or drawer that provides access to a freezer compartment 14. The refrigerator 1 includes a powered cooling system 16 that cools the compartments 12 and 14. The cooling system 16 may comprise a known system of the type including a compressor, condenser, evaporator, and related components that are generally known in the art. Doors 8A and 8B are movably connected to the cabinet 2 by upper hinges 18A and 18B, and lower hinges 20A and 20B, respectively. Hinges 18A and 18B may comprise a known design that permits vertical movement of doors 8A and 8B relative to cabinet 2. As discussed in more detail below, hinges 20A and 20B include adjustment features that permit vertical movement/adjustment of the doors 8A and 8B relative to cabinet 2. This height adjustment ensures that the upper edges 24A and 24B of doors 8A and 8B, respectively, are at the same height (FIG. 1), thereby ensuring that the appearance of the refrigerator 1 is acceptable. Hinge 20B is discussed in more detail below. Hinges 20A and 20B are mirror images of each other, and the following description of hinge 20B also applies to hinge 20A, except that the corresponding components are mirror images of each other.
With reference to FIGS. 3 and 4, hinge 20B includes a first hinge structure or bracket 26 that is secured to cabinet 2 by fasteners 28. Bracket 26 includes a base 30 and an outwardly-extending structure or protrusion 32. The base 30 and protrusion 32 may comprise plate-like structures having generally uniform thickness. A threaded opening 34 adjacent outer end 36 of protrusion 32 threadably receives a threaded portion 38 of adjustment lever 22. As discussed in more detail below, adjustment lever 22 includes an arm 40 with opposite side edges 41A and 41B. Arm 40 can be grasped and rotated by a user to vertically shift the adjustment lever 22 and door 8B as shown by the arrow “A” (FIG. 4). If right-handed threads are utilized, rotation of lever 22 in a clockwise direction (FIG. 3) causes lever 22 to shift upwardly, thereby raising door 8B, and rotation of lever 22 in a counterclockwise direction causes lever 22 to shift downwardly thereby lowering door 8B. As also discussed in more detail below, a hinge bushing 42A disposed on adjustment lever 22 engages door 8B and provides for rotation of door 8B relative to cabinet 2. A threaded opening 44 in protrusion 32 receives a set screw 46. Set screw 46 limits rotation of adjustment lever 22 in the counterclockwise direction to a maximum counterclockwise rotational position 40B (FIG. 3) due to contact between side edge 41B of lever 22 and set screw 46, thereby ensuring that the adjustment lever 22 is not inadvertently completely disconnected from threaded opening 34 of bracket 26 during adjustment of the height of the door 8B. When lever 22 is rotated clockwise to a maximum clockwise rotational position 40A (FIG. 3), lever 22 contacts lower surface 33 of bracket 26 and thereby prevents rotation of lever 33 beyond a rotational position 40A corresponding to a maximum upwardly-adjusted position of door 8B. Thus, set screw 46 provides a counterclockwise rotational stop at position 40B corresponding to a lowermost height adjustment of door 8B, and lower surface 33 of bracket 26 provides a clockwise rotational stop at position 40A corresponding to an uppermost height adjustment of door 8B.
With further reference to FIGS. 5 and 6, adjustment lever 22 includes an end portion 48 having a cylindrical outer surface 50. The end portion 48 preferably has an outer diameter that is somewhat less than the outer diameter of the threaded portion 38. An annular ring-shaped surface 52 extends transversely from the cylindrical surface 50 to the threaded portion 38. When assembled, the end portion 48 of adjustment lever 22 is received in an opening 54 of hinge bushing 42A, and annular surface 52 of adjustment lever 22 slidably engages end surface 55A or 55B of bushing 42A or bushing 42B, respectively. The bushing 42A comprises a gravity closer bushing having tapered upper surfaces 56A that are configured to generate a moment tending to close the door 8B. Alternatively, the end portion 48 of adjustment lever 22 may be received in an auto closer bushing 42B. As discussed below, auto closer bushing 42B includes a slot or opening 43 that is configured to receive and rotatably engage an auto-closer shaft 68 (FIG. 9) when door 8 is installed. The auto closer bushing 42B may be utilized in connection with a spring or other mechanism (not shown) that generates a force biasing the door 8B towards a closed position.
Bushings 42A and 42B include tabs 58A and 58B, respectively. When assembled, the tabs 58A or 58B are received in a slot 60 in protrusion 32 of bracket 26. The slot 60 is located adjacent to threaded opening 34. The engagement of tabs 58A and 58B with slot 60 prevent rotation of bushings 42A and 42B relative to bracket 26, while permitting vertical movement of bushings 42A and 42B relative to bracket 26.
With further reference to FIG. 9, the threaded portion 38 of adjustment lever 22 includes “buttress” threads 39 wherein the load-bearing thread face is perpendicular to the screw access “A1” or at a slight slant (typically no greater than 7°). The other face is slanted at about 45°. The threaded portion 38 is preferably self-locking such that increased refrigerator door loads do not cause the adjustment lever 22 to rotate. Although “buttress” threads are presently preferred, it will be understood that the present disclosure is not limited to this type of thread. Threads 39 are preferably right-handed, but could be left-handed. The threads utilized at hinge 20A (FIG. 2) may have left-handed threads if the threads of hinge 20B are right-handed, and vice-versa. This provides for mirror-image operation of the levers 22 utilized in hinges 20A and 20B. Alternatively, hinges 20A and 20B may both utilize right-handed threads, or hinges 20A and 20B may both utilize left-handed threads.
With further reference to FIG. 8, when assembled, gravity closer bushing 42A is received in a gravity closure outer bushing 62A. Outer bushing 62A is disposed in an opening 64A at lower edge 25A of door 8A. The outer bushing 62A includes an inner surface 66A that slidably engages end surface 56A of bushing 42A to generate a force tending to close door 8A when door 8A is opened. The shape and configuration of the surfaces 56A and 66A of bushings 42A and 62A, respectively, are generally known in the art, such that a detailed description of surfaces 56A and 66A is not believed to be required.
With further reference to FIG. 9, if an auto closer bushing 42B (FIG. 6) is utilized, an auto-closer member 62B is installed in lower edge 25A of door 8A. Auto-closer member 62B includes an opening or pocket 64B that rotatably receives an end portion 56B of bushing 42B, and a shaft 68 disposed in pocket 64B. When assembled, shaft 68 is received in slot/opening 43 of bushing 42B to thereby rotatably support the door 8A. The configuration of auto closer bushing 42B and auto-closer member 62B may be similar to known auto closer bushing arrangements, such that a detailed description of these features is not believed to be required.
Referring again to FIGS. 3-6, during assembly adjustment lever 22 is threadably connected to bracket 26 by rotating the adjustment lever 22 in a clockwise direction (if right handed threads are utilized) with threaded portion 38 in threaded engagement with threaded opening 34 of bracket 26. The adjustment lever 22 is initially rotated to an upper most position 40A wherein adjustment arm 40 is directly adjacent, or in contact with lower surface 33 of protrusion 32 of bracket 46 (FIG. 4). Position 40A of adjustment lever 22 corresponds to a maximum door height adjustment or position. Set screw 46 is then installed in threaded opening 44. Rotation of adjustment lever 22 in a counterclockwise direction causes the adjustment lever 22 to move downwardly until side edge 41B of arm 40 contacts set screw 46. The set screw 46 limits rotation of arm 40 of adjustment lever 22 to a position 40B, and ensures that the adjustment lever 22 cannot be rotated to a position in which the threaded portion 38 of adjustment lever 22 would disengage from threaded opening 34. In the illustrated example, rotation of adjustment lever 22 is thereby limited to a range of about 30°. However, the maximum rotation of lever 22 may be in the range of about 10°-45°, as may be required for a particular application. Rotation of lever 22 is preferably limited such that arm 40 does not project outwardly beyond the front face or side edge of door 8B, such that arm 40 remains positioned below lower edge 25A (FIGS. 8 and 9) of door 8B.
As discussed above, when adjustment lever 22 is rotated to a maximum rotational position 40A in the clockwise direction (corresponding to an uppermost door height adjustment position), arm 40 contacts lower surface 33 of bracket 26 (FIG. 4). Conversely, when adjustment lever 22 is rotated to a maximum counterclockwise rotational position 40B (corresponding to a lowermost door height adjustment position), side edge 41B of arm 40 of adjustment lever 22 contacts set screw 46, thereby limiting rotation of adjustment lever 22. After the adjustment lever 22 and set screw 46 are installed to bracket 26, a bushing 42A or 42B is then positioned on end portion 48 of adjustment lever 22, with tab 58A or 58B, respectively, in slot 60 of bracket 26. The door 8A may then be positioned on the hinges 18B and 20B.
If necessary, adjustment lever 22 can be rotated to adjust the height of the door 8A. As discussed above, hinge 20A is a mirror image of hinge 20B. Accordingly, hinge 20A and door 8A can be assembled in substantially the same manner as described above for the hinge 20B and door 8B.
The pitch of the threads 39 (FIG. 7) of threaded portion 38 of adjustment lever 22 may be selected to provide a required range of adjustment for the height of the doors 8A and 8B. For example, the pitch of the threads may be selected to provide a total vertical adjustment range of about 6 mm when lever 22 is rotated through its maximum allowable rotational range (e.g. 30°). The components can be designed such that the doors 8A and 8B are nominally at the correct height when arm 40 of adjustment lever 22 is at a central rotational location that is midway or centered between the maximum rotational adjustment positions 40A and 40B. If the heights of the doors 8A and/or 8B need to be adjusted, rotation of adjustment lever 22 can be utilized to shift the door 8A or 8B up about 3 mm, or down about 3 mm from the center of the range of adjustment.
The adjustment lever 22 enables a user to rotate the adjustment lever 22 by hand, such that tools are not required. Also, because the adjustment lever 22 is relatively small, and positioned between the upper doors 8A and 8B, and lower door 10, the adjustment lever 22 is generally hidden. The stop provided by set screw 46 ensures that the adjustment lever 22 cannot be inadvertently disengaged from the bracket 26. The stop provided by lower surface 33 (FIG. 4) of bracket 26 ensures that arm 40 of lever 22 cannot be rotated outwardly to a position in which arm 40 would project outwardly beyond the front surfaces of the doors 8A or 8B. Accordingly, the present disclosure provides an intuitive solution for easy adjustment of refrigerator door height without requiring use of any specific tool.
It is to be understood that variations and modifications can be made on the aforementioned structure without departing from the concepts of the present disclosure, and further it is to be understood that such concepts are intended to be covered by the following claims unless these claims by their language expressly state otherwise.
Patent Application
20170176089
