# US 8,740,322 B2 · Refrigerator with slidable shelf

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- Number: US 8,740,322 B2
- Document ID: US8740322B2
- Status: Granted
- Kind: B2
- Application number: 13/443,424
- Filed: 2012-04-10
- Published: 2012-10-25
- Granted: 2014-06-03
- Earliest claimed: 2011-04-11
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Young Kyu Moon; Hyun Sang Yoo; Sang Bum Kim; Yun Ho Yang; Sang Woon Jeon; Hyoung Min Go
- Inventors: Young Kyu Moon; Hyun Sang Yoo; Sang Bum Kim; Yun Ho Yang; Sang Woon Jeon; Hyoung Min Go
- Web page: https://patentgrep.com/patent/US8740322B2

## CPC

- F25D 25/024: {Slidable shelves}
- F25D 23/067: {Supporting elements}
- A47B 96/02: Shelves (movable shelves coupled to doors A47B96/16)
- A47B 96/025: {Shelves with moving elements, e.g. movable extensions or link elements (cabinets, racks or shelf units enabling enlargement in height, length or depth A47B45/00)}
- F25D 2325/021: Shelves with several possible configurations
- F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B)
- A47B: TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE (furniture jointing F16B)

## Abstract

A refrigerator includes a sliding rail assembly of a triple rail type, which is slidably installed to a sidewall of a storage compartment, a rail cover to cover the sliding rail assembly, and a sliding shelf removably coupled at one end thereof to the rail cover so as to slide forward or rearward relative to the storage compartment, which prevents sagging of the sliding shelf despite an increased withdrawal distance of the shelf, and results in enhanced quality.

## Claims

### Claim 1

A refrigerator comprising:
a main body having a storage compartment divided into upper and lower regions by an intermediate partition, the main body including an inner shell defining the storage compartment and an outer shell spaced apart from the inner shell with a thermal-insulating material interposed between the inner and outer shell;
a door to open or close the storage compartment;
a first shelf removably mounted to a rear wall of the inner shell in a height adjustable manner;
a second shelf horizontally aligned with the first shelf between the first shelf and a sidewall of the inner shell, and comprising a wire arm having a pair of rotating shafts pivotally coupled to be moved between a horizontally unfolded (lowered) position and a vertically folded (raised) position and rotating along an axis allowing the second shelf to expand a surface area of the first shelf when the wire arm is in the vertically folded (raised) position; and
a sliding unit to move the second shelf forward or rearward relative to the storage compartment,
wherein the sliding unit includes a sliding rail assembly slidably installed to the sidewall of the inner shell, and a rail cover coupled to the second shelf and configured to cover the sliding rail assembly to prevent exposure of the sliding rail assembly.

### Claim 2 (depends on 1)

The refrigerator according to claim 1, further comprising a guide provided between the first shelf and the second shelf to support one end of the second shelf when the second shelf is moved while being supported at the other end thereof by the sliding unit, thereby guiding movement of the second shelf.

### Claim 3 (depends on 2)

The refrigerator according to claim 2, wherein the guide includes a roller member installed to a lateral surface of the first shelf, and a roller support recess is formed in a lateral surface of the second shelf so as to come into contact with the roller member.

### Claim 4 (depends on 1)

The refrigerator according to claim 1, wherein the sliding unit has a length less than a front-and-rear length of the storage compartment and is moved between a front end and a rear end of the storage compartment.

### Claim 5 (depends on 1)

The refrigerator according to claim 1, wherein the second shelf includes an article carrying surface on which an article will be placed, and a coupling frame extending orthogonal to the article carrying surface and coupled to the rail cover.

### Claim 6 (depends on 5)

The refrigerator according to claim 5, wherein the sliding unit further includes a fixed bracket coupled to the inner shell to support the sliding rail assembly, and wherein the rail cover is coupled to the sliding rail assembly to be moved along with the sliding rail assembly.

### Claim 7 (depends on 6)

The refrigerator according to claim 6, wherein the sliding rail assembly includes a rail fixing member to come into contact with the fixed bracket at a maximally inserted position of the second shelf, thereby restricting movement of the sliding unit by friction.

### Claim 8 (depends on 6)

The refrigerator according to claim 6, wherein the sliding rail assembly includes a first rail secured to the fixed bracket, a second rail slidably coupled to the first rail and having a length greater than that of the first rail, and a third rail secured to the rail cover to be moved relative to the second rail and having a length greater than that of the second rail.

### Claim 9 (depends on 8)

The refrigerator according to claim 8, wherein ball members are provided between the first rail, the second rail, and the third rail.

### Claim 10 (depends on 6)

The refrigerator according to claim 6, wherein the sliding rail assembly includes a position control bump formed of an elastic material, the position control bump coming into contact with the sliding rail assembly to restrict the maximum withdrawal distance of the second shelf when the second shelf is withdrawn.

### Claim 11 (depends on 6)

The refrigerator according to claim 6, wherein the fixed bracket includes a rolling member to support a lower portion of the rail cover in order to guide smooth movement of the rail cover and prevent the rail cover from sagging by external force applied to the rail cover.

### Claim 12 (depends on 5)

The refrigerator according to claim 5, wherein the coupling frame includes the wire arm vertically pivotally coupled thereto to prevent separation of an article, the wire arm extending along an edge of the article carrying surface at the upper side of the edge.

### Claim 13 (depends on 12)

The refrigerator according to claim 12, wherein the wire arm includes a pair of horizontal portions vertically spaced apart from each other and having a bent shape corresponding to the periphery of the second shelf, a pair of vertical portions connecting opposite distal ends of the pair of horizontal portions to each other, and a pair of rotating shafts extending from the pair of vertical portions and coupled to the coupling frame, and
wherein each of the pair of rotating shafts is provided with a stopper member to restrict a pivoting angle of the wire arm.

### Claim 14 (depends on 1)

The refrigerator according to claim 1, wherein the second shelf is removable from the rail cover, the rail cover is provided at opposite sides thereof with a pair of fitting portions to allow the second shelf to be coupled to the rail cover when the second shelf is moved downward from above the rail cover, and the coupling frame is provided with a pair of indented fitting regions corresponding to the pair of fitting portions.

### Claim 15

A refrigerator comprising:
a main body having a storage compartment divided into upper and lower regions by an intermediate partition, the main body including an inner shell defining the storage compartment and an outer shell spaced apart from the inner shell with a thermal-insulating material interposed between the inner and outer shell;
a door to open or close the storage compartment;
a first shelf removably mounted to a rear wall of the inner shell in a height adjustable manner;
a second shelf horizontally aligned with the first shelf between the first shelf and a sidewall of the inner shell; and
a sliding unit to move the second shelf forward or rearward relative to the storage compartment,
wherein the sliding unit includes a sliding rail assembly slidably installed to the sidewall of the inner shell, and a rail cover coupled to the second shelf and configured to cover the sliding rail assembly to prevent exposure of the sliding rail assembly,
wherein the second shelf includes an article carrying surface on which an article will be placed, and a coupling frame extending orthogonal to the article carrying surface and coupled to the rail cover,
wherein the coupling frame includes a wire arm vertically pivotally coupled thereto to prevent separation of an article, the wire arm extending along an edge of the article carrying surface at the upper side of the edge
wherein the wire arm includes a pair of horizontal portions vertically spaced apart from each other and having a bent shape corresponding to the periphery of the second shelf, a pair of vertical portions connecting opposite distal ends of the pair of horizontal portions to each other, and a pair of rotating shafts extending from the pair of vertical portions and coupled to the coupling frame,
wherein each of the pair of rotating shafts is provided with a stopper member to restrict a pivoting angle of the wire arm, and
wherein the coupling frame includes a stopper receptacle configured to accommodate the stopper member, the stopper receptacle having a plurality of stopper grooves vertically spaced apart from each other, and
wherein the stopper member includes a stopper boss to be caught by a corresponding one of the plurality of stopper grooves according to the pivoting angle of the wire arm.

### Claim 16 (depends on 15)

The refrigerator according to claim 15, wherein the stopper receptacle includes a restraint bore to restrain pivoting of the wire arm in a vertically folded (raised) state of the wire arm, and the stopper member includes a press-fit rod to be press-fitted into the restraint bore in the vertically folded (raised) state of the wire arm.

### Claim 17

A refrigerator comprising:
a main body including an inner shell defining a storage compartment, an outer shell spaced apart from the inner shell, and a thermal-insulating material interposed between the inner shell and the outer shell;
a door coupled to the main body to open or close the storage compartment;
a sliding unit including a fixed bracket secured to a sidewall of the inner shell to slide forward or rearward relative to the storage compartment, a sliding rail assembly coupled to the fixed bracket, and a rail cover coupled to the sliding rail assembly to cover the fixed bracket and the sliding rail assembly; and
a sliding shelf including an article carrying surface on which an article will be placed, a coupling frame extending from the article carrying surface and removably coupled to the rail cover, and a wire arm having a pair of rotating shafts pivotally coupled to opposite sides of the coupling frame to be moved between a horizontally unfolded (lowered) position and a vertically folded (raised) position and rotating along an axis allowing the sliding shelf to expand a surface area of another shelf when the wire arm is in the vertically folded (raised) position,
wherein the wire arm extends from the pair of rotating shafts to extend along an edge of the article carrying surface at the upper side of the edge, and each of the pair of rotating shafts is provided with a stopper member to restrict a pivoting angle of the wire arm.

### Claim 18 (depends on 17)

The refrigerator according to claim 17, wherein a length between front and rear ends of the rail cover is less than a front-and-rear length of the storage compartment.

### Claim 19 (depends on 18)

The refrigerator according to claim 18, wherein the rail cover does not protrude outward from a front end of the storage compartment when the rail cover is withdrawn to the maximum extent.

### Claim 20 (depends on 17)

The refrigerator according to claim 17, wherein the sliding unit includes a rolling member installed to the fixed bracket to support a lower portion of the rail cover in order to prevent the rail cover from sagging by external force applied to the rail cover.

### Claim 21 (depends on 17)

The refrigerator according to claim 17, wherein the sliding rail assembly includes a rail fixing member to restrict movement of the sliding unit by coming into frictional contact with the fixed bracket when the sliding unit is pushed inward to the maximum extent, and a position control bump formed of an elastic material, the position control bump restricting the maximum withdrawal distance of the sliding unit by coming into contact with the fixed bracket when the sliding unit is withdrawn outward.

### Claim 22 (depends on 17)

The refrigerator according to claim 17, wherein the sliding rail assembly includes a first rail to be moved along with the rail cover, a second rail coupled to the fixed bracket, and a third rail slidably coupled between the first rail and the second rail to extend the withdrawal distance of the first rail.

### Claim 23

A refrigerator comprising:
a main body having a storage compartment divided into upper and lower regions by an intermediate partition, the main body including an inner shell defining the storage compartment and an outer shell spaced apart from the inner shell with a thermal-insulating material interposed between the inner shell and the outer shell;
a door to open or close the storage compartment;
a first shelf removably mounted to a rear wall of the inner shell;
a second shelf arranged parallel to the first shelf between the first shelf and a sidewall of the inner shell, the second shelf including an article carrying surface on which an article will be placed and a coupling frame extending from the article carrying surface, and comprising a wire arm having a pair of rotating shafts pivotally coupled to be moved between a horizontally unfolded (lowered) position and a vertically folded (raised) position and rotating along an axis allowing the second shelf to expand a surface area of the first shelf when the wire arm is in the vertically folded (raised) position;
a sliding unit slidably coupled to the sidewall of the inner shell to allow the second shelf to be moved forward or rearward relative to the storage compartment while supporting one end of the second shelf; and
a guide provided between the first shelf and the second shelf to support the other end of the second shelf when the second shelf is moved by the sliding unit, thereby guiding movement of the second shelf,
wherein the sliding unit includes a fixed bracket coupled to the inner shell, a sliding rail assembly coupled to the fixed bracket, and a rail cover coupled to the sliding rail assembly to cover the fixed bracket and the sliding rail assembly, the rail cover being coupled to the coupling frame of the second shelf.

### Claim 24

A refrigerator comprising:
a main body having a storage compartment divided into upper and lower regions by an intermediate partition, the main body including an inner shell defining the storage compartment and an outer shell spaced apart from the inner shell with a thermal-insulating material interposed between the inner shell and the outer shell;
a door to open or close the storage compartment;
a first shelf removably mounted to a rear wall of the inner shell;
a sliding unit slidably coupled to a sidewall of the inner shell to be movable forward or rearward relative to the storage compartment;
a second shelf arranged parallel to the first shelf between the first shelf and the sidewall of the inner shell, the second shelf including an article carrying surface and a coupling frame extending from the article carrying surface and fitted into the sliding unit, and comprising a wire arm having a pair of rotating shafts pivotally coupled to be moved between a horizontally unfolded (lowered) position and a vertically folded (raised) position and rotating along an axis allowing the second shelf to expand a surface area of the first shelf when the wire arm is in the vertically folded (raised) position; and
a guide provided between the first shelf and the second shelf to support the second shelf when the second shelf is moved by the sliding unit, thereby guiding movement of the second shelf.

### Claim 25

A refrigerator comprising:
a main body having a storage compartment divided into upper and lower regions by an intermediate partition, the main body including an inner shell defining the storage compartment and an outer shell spaced apart from the inner shell with a thermal-insulating material interposed between the inner shell and the outer shell;
a door to open or close the storage compartment;
a first shelf removably mounted to a rear wall of the inner shell;
a sliding unit slidably coupled to a sidewall of the inner shell to be movable forward or rearward relative to the storage compartment;
a second shelf arranged parallel to the first shelf between the first shelf and the sidewall of the inner shell, the second shelf including an article carrying surface and a coupling frame extending orthogonal to the article carrying surface and coupled to the sliding unit, and comprising a wire arm having a pair of rotating shafts pivotally coupled to be moved between a horizontally unfolded (lowered) position and a vertically folded (raised) position and rotating along an axis allowing the second shelf to expand a surface area of the first shelf when the wire arm is in the vertically folded (raised) position; and
a guide provided between the first shelf and the second shelf to support the second shelf when the second shelf is moved by the sliding unit, thereby guiding movement of the second shelf,
wherein the coupling frame includes the wire arm vertically pivotally coupled thereto to prevent separation of an article, the wire arm extending along an edge of the article carrying surface at the upper side of the edge.