Counterbalance assembly for a dishwasher door and associated method

• US 8,042,891 B2
• Filed: 11/23/2010
• Issued: 10/25/2011
• Est. Priority Date: 05/04/2007
• Status: Active Grant

• Current Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Original Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Inventors: Helgesen, John, Stewart, Daniel M., Tynes, Ronald G.
• Primary Examiner(s): Wilkens; Janet M
• Assistant Examiner(s): ROHRHOFF, DANIEL J
• Application Number:
  US12/953,087
• Publication Number:
  US 20110062840A1
• Time in Patent Office: 336 Days
• Field of Search: 3123192-3194, 312/327, 312/328, 312/311, 312/228, 68/3.R, 681/96, 16/78, 16/81, 16/72, 162/86, 493/86, 493/87, 474/1, 474/58, 474/62
• US Class Current: 312/328
• CPC Class Codes: A47L 15/4261 Connections of the door to the casing, e.g. door hinges
• CPC Class Codes: E05Y 2900/304 for dishwashers

Abstract

A dishwasher is provided, comprising a door pivotably attached to a body and having a counterbalance assembly coupled therebetween for facilitating pivoting of the door, wherein the counterbalance assembly includes a biasing member coupled to the body and serially engaged with a flexible element coupled to the door, and a guide member secured to the body and including a fixed arcuate member defining a first guide track, and a pulley rotatable about an axis and defining a second guide track, wherein the flexible element is at least partially wrapped about each of the fixed arcuate member and the pulley so as to serially engage the first and second guide tracks, and wherein the first guide track of the fixed arcuate member is offset from the second guide track of the pulley along the axis thereof.

Claims

1. A dishwasher for reducing squealing as a result of pivoting a door with respect to a body of a dishwasher, the dishwasher comprising:

a door pivotably attached to a body via a hinge assembly comprising a hinge bracket coupled to the door, and a counterbalance assembly coupled between the body and the hinge bracket for facilitating pivoting of the door, wherein the counterbalance assembly comprises;

a biasing member coupled to the body;

a flexible element serially engaged with the biasing member and having a coupling member serially engaged therewith opposite the biasing member;

a non-metallic bushing fixed to the hinge bracket and configured to engage the coupling member such that the non-metallic bushing is disposed therebetween, wherein the non-metallic bushing is independent of the coupling member such that the coupling member is configured to pivot with respect to the hinge bracket and the non-metallic bushing as the door pivots and the non-metallic bushing is configured to reduce squealing between the coupling member and the hinge bracket; and

a guide member coupled to the body and including a fixed arcuate member defining a first guide track, and a pulley rotatable about an axis and defining a second guide track, wherein the flexible element is at least partially wrapped about each of the fixed arcuate member and the pulley so as to serially engage the first and second guide tracks.

2. The dishwasher of claim 1, wherein the hinge bracket comprises a slot, and wherein the non-metallic bushing corresponds to a shape of the slot.

3. The dishwasher of claim 2, wherein the slot and the non-metallic bushing are U-shaped.

4. The dishwasher of claim 2, wherein the coupling member of the flexible element is engaged within the slot such that the non-metallic bushing is disposed between the coupling member and the hinge bracket.

5. The dishwasher of claim 2, wherein the coupling member comprises an opening configured to receive a portion of the non-metallic bushing and the hinge bracket so as to be engaged within the slot.

6. The dishwasher of claim 1, wherein the fixed arcuate member is secured to the body such that the fixed arcuate member cannot pivot or rotate with respect to the body.

7. The dishwasher of claim 1, wherein the coupling member comprises an opening configured to receive a portion of the hinge bracket and the non-metallic bushing.

8. A method for reducing squealing as a result of pivoting a door with respect to a body of a dishwasher, the method comprising:

coupling a biasing member to the body;

serially engaging the biasing member with a flexible element;

serially engaging a coupling member with the flexible element opposite the biasing member;

fixing a non-metallic bushing to a hinge bracket coupled to the door;

coupling the coupling member to the non-metallic bushing such that the non-metallic bushing is disposed between the coupling member and the hinge bracket, wherein the non-metallic bushing is independent of the coupling member such that the coupling member is configured to pivot with respect to the hinge bracket and the non-metallic bushing as the door pivots and the non-metallic bushing is configured to reduce squealing between the coupling member and the hinge bracket;

securing a guide member to the body, the guide member including a fixed arcuate member defining a first guide track and a pulley rotatable about an axis and defining a second guide track; and

wrapping the flexible element at least partially about each of the fixed arcuate member and the pulley so as to serially engage the first and second guide tracks.

9. The method of claim 8, wherein the coupling member comprises an opening, and wherein the coupling step comprises positioning the coupling member such that the opening is received by a portion of the hinge bracket and the non-metallic bushing.

10. The method of claim 8, wherein the hinge bracket comprises a slot and wherein the non-metallic bushing corresponds to a shape of the slot, and wherein the coupling step comprises positioning the coupling member within the slot such that the non-metallic bushing is disposed between the coupling member and the hinge bracket.