Dish washer

Patent metadata

Field	Value
Publication number	US-11096548-B2
Application number	US-201916536423-A
Country	US
Kind code	B2
Filing date	Aug 9, 2019
Priority date	Feb 4, 2015
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A dishwasher may include a sump configured to store water, a main arm disposed at the sump and configured to supply water from the sump, an auxiliary arm rotatably disposed at the main arm and configured to spray water, and an auxiliary arm connection member disposed at the main arm and configured to rotatably support the auxiliary arm, where the auxiliary arm may include an auxiliary flow passage configured to allow water flow through the auxiliary arm, where the main arm may include a transfer flow passage in fluid communication with the auxiliary flow passage, where the auxiliary arm connection member may include a flow tube disposed at the main arm in fluid communication with the transfer flow passage and the auxiliary flow passage.

First claim

What is claimed is:

1. A dishwasher comprising:
a sump configured to store water;
a main arm that is disposed at the sump and that is configured to receive water from the sump;
an auxiliary arm that is rotatably disposed at the main arm and that is configured to spray water; and
an auxiliary arm connection member disposed at the main arm and that is configured to rotatably support the auxiliary arm,
wherein the auxiliary arm includes an auxiliary flow passage that is configured to allow water to flow through the auxiliary arm,
wherein the main arm includes an outlet that is in fluid communication with the auxiliary flow passage,
wherein the auxiliary arm connection member comprises:
an insertion tube that is configured to be inserted into the outlet of the main arm;
an extension tube that is configured to communicate with the insertion tube to cause the water introduced from the insertion tube to flow through the extension tube;
a shaft connected to the extension tube and that is configured to be inserted into the auxiliary flow passage;
a plurality of support ribs, each of the plurality of support ribs including a first end portion that is connected to the extension tube and a second end portion that is connected to the shaft; and
a protrusion that is configured to protrude from the shaft.

2. The dishwasher according to claim 1 , further comprising a limiting part that is disposed between the insertion tube and the extension tube, and that is configured to limit an insertion range of the insertion tube.

3. The dishwasher according to claim 1 , further comprising a flow prevention part to press inner circumferential surfaces of a transfer flow passage at an outlet of the main arm.

4. The dishwasher according to claim 3 , wherein the flow prevention part has a shape that is inclined outward after a portion of the insertion tube is cut out.

5. The dishwasher according to claim 1 , further comprising a plurality of bearings, each of the plurality of bearings is configured to protrude from an outer circumferential surface of the extension tube to contact with an inner circumferential surface of the auxiliary arm based on rotation of the auxiliary arm.

6. The dishwasher according to claim 5 , wherein the plurality of bearings comprises:
a first bearing that has a plurality of protruding portions; and
a second bearing that has a ring-shaped rib along the outer circumferential surface of the extension tube.

7. The dishwasher according to claim 5 , further comprising a contact part that is disposed at the auxiliary arm and that is configured to contact at least one of the bearings.

8. The dishwasher according to claim 7 , wherein the contact part includes a discharge hole that is configured to communicate with an outer portion of the auxiliary arm,
wherein the discharge hole is configured to discharge water that flows backward from the auxiliary flow passage to the contact part.

9. The dishwasher according to claim 1 , wherein water flowing through the auxiliary flow passage is introduced into the auxiliary flow passage via the insertion tube and the extension tube.

10. The dishwasher according to claim 1 , wherein at least one of the one or more support ribs includes a flow hole defined at one side,
wherein water flowing through the auxiliary flow passage flows to the auxiliary flow passage via the flow hole.

11. The dishwasher according to claim 1 , further comprising a reinforcement rib that is configured to extend downward from a lower portion of the shaft to reinforce the strength of the shaft.

12. The dishwasher according to claim 11 , wherein the reinforcement rib is connected to at least one of the one or more support ribs.

13. The dishwasher according to claim 1 , wherein the plurality of support ribs are oriented equiangular from each other with respect to the shaft.

14. The dishwasher according to claim 1 , further comprising a departure restriction part disposed at the auxiliary arm and that is configured to contact the protrusion and to surround at least a portion of the shaft to restrict separation from the auxiliary arm connection member based on rotation of the auxiliary arm.

15. The dishwasher according to claim 1 , further comprising a support part that is configured to support the shaft and that is disposed at the auxiliary flow passage, wherein the support part is configured to surround at least a portion of the shaft.

16. The dishwasher according to claim 1 , wherein the auxiliary arm connection member is configured to release from coupling with the auxiliary arm based on the auxiliary arm rotating to a position that defines a predetermined angle with the auxiliary arm connection member.

17. The dishwasher according to claim 1 , wherein the one or more support ribs comprises:
a first support rib that is disposed at a first side of the extension tube and that is configured to extend in a longitudinal direction of the extension tube;
a second support rib that is disposed at a second side of the extension tube and that is configured to be parallel to the first support rib; and
a third support rib connected to the first support rib and the second support rib, wherein the shaft is connected to the third support rib.

18. The dishwasher according to claim 17 , wherein an inner circumferential surface of the third support rib is oriented at an acute angle with the longitudinal direction of the extension tube.

19. The dishwasher according to claim 17 , wherein the inner circumferential surface of the third support rib is inclined and configured to guide upward water introduced into the auxiliary flow passage via the extension tube.

20. The dishwasher according to claim 17 , wherein a vertical width of the one or more support ribs is greater than a horizontal width.

Assignees

• Lg Electronics Inc

Inventors

• Woo Seyoung
• Pyo Joonho
• Kim Daegyu
• Lee Taehee

Classifications

• A47L15/42 Primary

  Details · CPC title

• A47L15/23

  moved by means of the sprays · CPC title

• A47L2501/20

  Spray nozzles or spray arms · CPC title

• A47L15/22 Primary

  Rotary spraying devices · CPC title

• A47L15/20 Primary

  Swingable spraying devices · CPC title