[특허]Dish rack height adjusting employing cam and follower mechanism

Whirlpool Corporation

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특허 상세정보

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Dish rack height adjusting employing cam and follower mechanism

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A47L-015/50
미국특허분류(USC)	134/135;
출원번호	US-0110055 (2011-05-18)
등록번호	US-9004082 (2015-04-14)
발명자 / 주소	Bhajak, Harshal J. McNerney, Gerald J. Ponkshe, Mihir Sharma, Amit K.
출원인 / 주소	Whirlpool Corporation
인용정보	피인용 횟수 : 2 인용 특허 : 21

초록

A dish rack is supported for vertical movement relative to a dishwasher tub, with the vertical adjustment being made by manually shifting the dish rack to cause a camming unit of a latching mechanism to cooperate with a follower in establishing at least a lowered position and a raised position for the rack. The camming unit includes a plurality of camming surfaces and ramps establishing multiple tiers upon which the follower is guided while being biased by a spring.

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1. A dishwasher comprising: a tub having top, bottom, rear and side walls that collectively define a washing chamber;a dish rack in the washing chamber, the dish rack having front, rear, side and bottom walls;an adjustment mechanism for vertically shifting the dish rack between lowered and raised positions relative to the tub; anda latching mechanism for retaining the dish rack in at least the raised position, said latching mechanism including a camming unit and a retainer element having a follower, said camming unit including multiple tiers on which the follower rides and a ledge, with the multiple tiers being located at different lateral distances relative to the side walls of the dish rack, said camming unit being configured to guide the follower along the multiple tiers upon shifting of the dish rack between the lowered and raised positions, wherein the follower is supported on the ledge when the dish rack is in the raised position, and wherein the follower moves in three different dimensions relative to the dish rack upon shifting of the dish rack between the lowered and raised positions. 2. The dishwasher according to claim 1, wherein said adjustment mechanism includes a base member having a lower body portion, an upper body portion and a shiftable support body secured to the rack and mounted to the upper body portion of the base member for vertical movement relative to both the upper body portion and the tub, the shiftable support body including an outer body member and an inner body member, said upper body portion of the base member being sandwiched between the outer and inner body members. 3. The dishwasher according to claim 2, wherein the latching mechanism is arranged between the outer and inner body members of the shiftable support body. 4. The dishwasher according to claim 3, wherein the latching mechanism operates between the base member and the shiftable support body. 5. The dishwasher according to claim 1, wherein the ledge is between the multiple tiers. 6. The dishwasher according to claim 5, wherein the camming unit includes a base portion defining a first tier of the multiple tiers, a first platform defining a second tier and a third platform defining a third tier, said follower traversing each of the first, second and third tiers in moving the dish rack from one of the raised and lowered positions to the other of the raised and lowered positions, and back. 7. The dishwasher according to claim 6, wherein the ledge is located between the second and third tiers. 8. The dishwasher according to claim 6, further comprising a first ramp leading from the first tier to the second tier. 9. The dishwasher according to claim 8, further comprising a second ramp leading from the second tier to the third tier. 10. The dishwasher according to claim 1, wherein the follower is configured to move both about a pivot axis and orthogonal to the pivot axis. 11. The dishwasher according to claim 10, further comprising a spring biasing the follower against the camming unit. 12. The dishwasher according to claim 1, wherein the camming unit includes a first camming surface leading to a ledge, said retainer element being guided along the first camming surface when the dish rack is shifted from the lowered position to the raised position and supported by the ledge to selectively retain the dish rack in the raised position. 13. A method of vertically adjusting a dish rack supported for selective vertical movement within a dishwasher, the dishwasher including a tub having top, bottom, rear and side walls that collectively define a washing chamber, an adjustment mechanism for vertically shifting the dish rack between lowered and raised positions relative to the tub and a latching mechanism for retaining the dish rack in at least the raised position, the dish rack located in the washing chamber and having front, rear, side and bottom walls, and the latching mechanism having a camming unit and a retainer element having a follower, the method comprising: guiding the follower of the retainer element along multiple tiers of the camming unit such that the follower moves in three different dimensions relative to the dish rack upon moving the dish rack between the lowered and raised positions, with the multiple tiers being located at different lateral distances relative to the side walls of the dish rack; andsupporting the follower on a ledge of the camming unit when the dish rack is in the raised position. 14. The method of claim 13, further comprising, when adjusting the dish rack from the lowered position to the raised position, guiding the follower over a first ramp leading from a first tier to a second tier of the multiple tiers. 15. The method of claim 14, further comprising, when adjusting the dish rack from the raised position to the lowered position, guiding the follower from the second tier over a second ramp leading from the second tier to a third tier of the multiple tiers. 16. The method of claim 15, further comprising, when adjusting the dish rack from the raised position to the lowered position, further guiding the follower directly from the third tier to the first tier. 17. The method of claim 13, further comprising: raising the dish rack from the lowered position to the raised position by manually lifting the dish rack to cause the follower of the retainer element to be shifted about a pivot axis while being biased against a first camming surface and then to shift in a direction of a biasing force in order to reach a ledge upon which the retainer element can be supported to retain the dish rack in the raised position. 18. The method of claim 17, further comprising: lowering the dish rack from the raised position to the lowered position by initially, manually lifting the dish rack until the retainer element shifts in the direction of the biasing force and then fully lowering the dish rack, during which the follower shifts about both a pivot axis and orthogonal to the pivot axis. 19. The method of claim 13, further comprising: continuously biasing the follower against the camming unit. 20. The method of claim 13, further comprising: moving the follower both about a pivot axis and orthogonal to the pivot axis when moving the dish rack between the lowered and raised positions.

인용문헌 (21)

이 특허를 인용한 특허 (2)

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Dish rack height adjusting employing cam and follower mechanism

초록

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특허 상세정보

Dish rack height adjusting employing cam and follower mechanism

초록

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인용문헌 (21)

이 특허를 인용한 특허 (2)

IPC 상위 출원인

과제정보

상세정보조회

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IPC 상세정보(version : 201201)

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