Anti-tip device for an appliance with an interlock switch

• US 7,775,498 B2
• Filed: 06/26/2007
• Issued: 08/17/2010
• Est. Priority Date: 06/26/2007
• Status: Active Grant

• Current Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Original Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Inventors: Fuller, Randall Lewis, Buckles, Howard Edgar, Phillips, Bryan Thomas, Shadwick, David
• Primary Examiner(s): STERLING, AMY JO
• Application Number:
  US11/768,473
• Publication Number:
  US 20090001246A1
• Time in Patent Office: 1,148 Days
• Field of Search: 248/680, 248/673, 248/677, 248/550, 248/500, 248/501
• US Class Current: 248/550
• CPC Class Codes: A47L 15/4253 Supporting arrangements for the casing, e.g. rollers or supporting legs
• CPC Class Codes: A47L 15/427 Arrangements for setting the machine, e.g. anti-tip devices therefor, fixing of integrated machines
• CPC Class Codes: D06F 39/125 Supporting arrangements for the casing, e.g. rollers or legs
• CPC Class Codes: F24C 15/083 Anti-tip arrangements

Abstract

An appliance includes a leg for support upon a support surface, an interlock switch mechanically coupled to the leg and electrically coupled to control circuitry of the appliance, an anti-tip bracket having an aperture configured to receive a portion of the leg, and means for operating the interlock switch when the leg is properly positioned within the aperture. In one example, an actuator is coupled to the leg and is movable relative to the leg when the leg is positioned within the aperture. In another example, the interlock switch includes a first and second electrode, and selective electrical contact occurs between the first and second electrodes when the actuator is moved. In another example, a member projects from the appliance and the anti-tip is configured to receive a portion of the member. A method is also provided for preventing use of an appliance due to improper installation of the appliance.

Claims

1. An appliance, including:

a leg for supporting the appliance upon a support surface;

an actuator coupled to and movable relative to the leg;

an interlock switch positioned upon and secured to the leg and electrically coupled to control circuitry of the appliance; and

an anti-tip bracket having an aperture configured to receive a portion of the leg, wherein the actuator is moved relative to the leg when the leg is positioned within the aperture, and wherein the actuator is adapted to interact with the interlock switch when the leg is properly positioned within the aperture.

2. The appliance of claim 1, wherein operation of the appliance is prevented when the leg is not properly positioned within the aperture.

3. The appliance of claim 1, wherein the leg includes a bore and the actuator includes a plunger adapted for telescopic movement within the bore.

4. The appliance of claim 1, wherein the interlock switch includes a first electrode and a second electrode, the second electrode being coupled to a portion of the actuator, movement of the actuator relative to the leg causing selective electrical contact between the first and second electrodes.

6. The appliance of claim 4, wherein movement of the actuator relative to the leg causes the first and second electrodes to complete an electrical circuit to thereby permit operation of the appliance.

7. The appliance of claim 6, wherein the interlock switch further includes a third electrode, movement of the actuator relative to the leg causing the second electrode to complete an electrical circuit between the first and third electrodes to thereby permit operation of the appliance.

8. The appliance of claim 4, wherein the interlock switch further includes an auxiliary electrode, movement of the actuator relative to the leg causing selective electrical contact between the second and auxiliary electrodes to thereby indicate the presence of the interlock switch.

9. The appliance of claim 4, wherein movement of the actuator relative to the leg causes the first and second electrodes to break an electrical circuit to thereby permit operation of the appliance.

13. The appliance of claim 1, wherein a cap is coupled to a portion of the actuator and wherein the aperture of the anti-tip bracket is at least partially bounded by a wall, the wall being adapted to engage the cap to cause movement of the actuator relative to the leg when the leg is properly positioned within the aperture.

14. The appliance of claim 13, wherein the actuator is resiliently biased in a first direction, engagement of the cap with the wall causing the actuator to move in second direction generally opposite to the first direction.

15. The appliance of claim 1, wherein the aperture of anti-tip bracket includes an open end for receiving a portion of the leg, the open end having a ramped portion to facilitate ingress of the leg within the aperture.

5. An appliance, including:

a leg for supporting the appliance upon a support surface;

an actuator coupled to and movable relative to the leg;

an interlock switch secured to the leg and electrically coupled to control circuitry of the appliance; and

an anti-tip bracket having an aperture configured to receive a portion of the leg, wherein the actuator is moved relative to the leg when the leg is positioned within the aperture, and wherein the actuator is adapted to interact with the interlock switch when the leg is properly positioned within the aperture,

wherein the interlock switch includes a first electrode and a second electrode, the second electrode being coupled to a portion of the actuator, movement of the actuator relative to the leg causing selective electrical contact between the first and second electrodes, and

wherein the first electrode is coupled to a portion of the leg.

10. An appliance, including:

a leg for supporting the appliance upon a support surface;

an actuator coupled to and movable relative to the leg;

an interlock switch secured to the leg and electrically coupled to control circuitry of the appliance; and

an anti-tip bracket having an aperture configured to receive a portion of the leg, wherein the actuator is moved relative to the leg when the leg is positioned within the aperture, and wherein the actuator is adapted to interact with the interlock switch when the leg is properly positioned within the aperture,

wherein the interlock switch includes a first electrode and a second electrode, the second electrode being coupled to a portion of the actuator, movement of the actuator relative to the leg causing selective electrical contact between the first and second electrodes, and

further including a switch carrier coupled to a portion of the leg and including an electrical coupler to permit the interlock switch to be electrically coupled to control circuitry of the appliance, the first electrode being coupled to a portion of the switch carrier.

11. The appliance of claim 10, wherein a portion of the switch carrier includes an anti-tamper snap connection adapted for a one-time installation.

12. The appliance of claim 10, wherein the switch carrier is rotatably coupled to a portion of the leg such that the leg can rotate relative to the switch carrier without interrupting the selective electrical contact between the first and second electrodes.

16. An appliance, including:

a member projecting from the appliance;

an actuator coupled to and movable relative to the member;

an interlock switch secured to the member and electrically coupled to control circuitry of the appliance; and

an anti-tip bracket having an aperture configured to receive a portion of the member, wherein the actuator is moved relative to the member when the member is positioned within the aperture, and wherein the actuator is adapted to interact with the interlock switch when the member is properly positioned within the aperture,

wherein the member includes a bore and the actuated includes a plunger adapted for telescopic movement within the bore.

17. The appliance of claim 16, wherein the member includes a leg for supporting the appliance upon a support surface.

18. The appliance of claim 16, wherein operation of the appliance is prevented when the member is not properly positioned within the aperture.

19. The appliance of claim 16, wherein the interlock switch includes a first electrode and a second electrode, the second electrode being coupled to a portion of the actuator, movement of the actuator relative to the main shaft causing selective electrical contact between the first and second electrodes.

20. The appliance of claim 19, wherein movement of the actuator relative to the member causes the first and second electrodes to complete an electrical circuit to thereby permit operation of the appliance.

21. The appliance of claim 20, wherein the interlock switch further includes a third electrode, movement of the actuator relative to the leg causing the second electrode to complete an electrical circuit between the first and third electrodes to thereby permit operation of the appliance.

22. The appliance of claim 19, wherein the interlock switch further includes an auxiliary electrode, movement of the actuator relative to the leg causing selective electrical contact between the second and auxiliary electrodes to thereby indicate the presence of the interlock switch.

23. The appliance of claim 19, further including a switch carrier coupled to a portion of the member and including an electrical coupler to permit the interlock switch to be electrically coupled to control circuitry of the appliance, the first electrode being coupled to a portion of the switch carrier.

24. The appliance of claim 16, wherein the member further includes a cap coupled to a portion of the actuator and wherein the aperture of the anti-tip bracket is at least partially bounded by a wall, the wall being adapted to engage the cap to cause movement of the actuator relative to the member when the member is properly positioned within the aperture.

25. An appliance, including:

a leg for supporting the appliance upon a support surface;

an interlock switch secured to the leg and electrically coupled to control circuitry of the appliance;

an anti-tip bracket having an aperture configured to receive a portion of the leg; and

means for operating the interlock switch when the leg is properly positioned within the aperture,

wherein the means for operating the interlock switch further includes a cap and wherein the aperture of the anti-tip bracket is at least partially bounded by a wall, the wall being adapted to engage the cap to cause operation of the interlock switch when the member is properly positioned within the aperture.

26. The appliance of claim 25, wherein operation of the appliance is prevented when the leg is not properly positioned within the aperture.

27. The appliance of claim 25, wherein the means for operating the interlock switch includes an actuator movable relative to the leg.

28. The appliance of claim 27, wherein the interlock switch includes a first electrode and a second electrode, the second electrode being coupled to a portion of the actuator, movement of the actuator relative to the main shaft causing selective electrical contact between the first and second electrodes.

29. The appliance of claim 28, wherein movement of the actuator relative to the member causes operation of the interlock switch to permit operation of the appliance when the first and second electrodes complete an electrical circuit.

30. The appliance of claim 28, further including a switch carrier coupled to a portion of the member and including an electrical coupler to permit the interlock switch to be electrically coupled to control circuitry of the appliance, the first electrode being coupled to a portion of the switch carrier.