Dish washer

Patent metadata

Field	Value
Publication number	US-2016220092-A1
Application number	US-201615015243-A
Country	US
Kind code	A1
Filing date	Feb 4, 2016
Priority date	Feb 4, 2015
Publication date	Aug 4, 2016
Grant date	—

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 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, wherein the auxiliary arm includes an auxiliary flow passage configured to allow water flow through the auxiliary arm, wherein the main arm includes a transfer flow passage in fluid communication with the auxiliary flow passage, wherein the auxiliary arm connection member comprises:
a flow tube disposed at the main arm in fluid communication with the transfer flow passage and the auxiliary flow passage,
a shaft inserted into the auxiliary flow passage, a protrusion extending from the shaft, and one or more support ribs configured to connect the flow tube to the shaft, and
a departure restriction part disposed at the auxiliary arm and configured to contact the protrusion, and to surround at least a portion of the shaft, thereby restricting separation from the auxiliary arm connection member based on rotation of the auxiliary arm.

2 . The dishwasher according to claim 1 , wherein water flowing through the transfer flow passage is introduced into the auxiliary flow passage via the flow tube.

3 . 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 transfer flow passage flows to the auxiliary flow passage via the flow hole.

4 . The dishwasher according to claim 1 , further comprising a reinforcement rib disposed at the shaft.

5 . The dishwasher according to claim 4 , wherein the reinforcement rib is connected to at least one of the one or more support ribs.

6 . The dishwasher according to claim 1 , wherein the one or more support ribs include a plurality of support ribs,
wherein the plurality of support ribs are positioned equiangular from each other with respect to the shaft.

7 . The dishwasher according to claim 1 , wherein the departure restriction part is configured to surround at least a portion of the shaft.

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

9 . 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.

10 . The dishwasher according to claim 1 , further comprising a limiting part disposed at an outer circumferential surface of the flow tube and configured to limit an insertion range of the flow tube.

11 . The dishwasher according to claim 1 , further comprising:
a bearing disposed at the outer circumferential surface of the flow tube; and a contact part disposed at the auxiliary arm and configured to contact the bearing unit.

12 . The dishwasher according to claim 11 , wherein the contact part includes a discharge hole configured to communicate with an outer portion of the auxiliary arm,
wherein the discharge hole is configured to discharge water flowed backward from the auxiliary flow passage to the contact part.

13 . The dishwasher according to claim 1 , wherein the flow tube is integral with the main arm.

14 . The dishwasher according to claim 1 , wherein the one or more support ribs comprises:
a first support rib disposed at a first side of the flow tube and configured to extend in a longitudinal direction of the flow tube; a second support rib disposed at a second side of the flow tube and 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.

15 . The dishwasher according to claim 14 , wherein each of a connection part configured to connect the first support rib to the third support rib, and a connection part configured to connect the second support rib to the third support rib are rounded.

16 . The dishwasher according to claim 14 , wherein an inner circumferential surface of the third support rib is oriented an acute angle with the longitudinal direction of the flow tube.

17 . The dishwasher according to claim 14 , 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 flow tube.

18 . The dishwasher according to claim 1 , wherein front end portions of the one or more support ribs are connected to the shaft,
wherein rear end portions of the one or more support ribs are connected to the inner circumferential surface of the flow tube.

19 . The dishwasher according to claim 18 , wherein the rear end portions of the one or more support ribs are inclined at acute angles with the inner circumferential surface of the flow tube.

20 . The dishwasher according to claim 18 , wherein a vertical width of the one or more support ribs is greater than a horizontal width.

21 . The dishwasher according to claim 18 , wherein the rear end portions of the one or more support ribs are configured to extend downward from an upper portion of the inner circumferential surface of the flow tube.

22 . The dishwasher according to claim 18 , wherein the rear end portions of the one or more support ribs are configured to extend upward from a lower portion of the inner circumferential surface of the flow tube.

23 . A dishwasher comprising:
a sump configured to store water; a main arm disposed at the sump and configured to receive the water from the sump; an auxiliary arm rotatably disposed at the main arm and comprising an auxiliary spray hole configured to spray the water; an auxiliary flow passage formed in the auxiliary arm and configured to supply the water discharged through the auxiliary spray hole; a transfer flow passage formed in the main arm and configured to supply the water to the auxiliary flow passage; and an auxiliary arm connection member connected to the main arm and inserted into the auxiliary flow passage to rotatably support the auxiliary arm, wherein a departure restriction part is disposed at the auxiliary arm and is configured to contact one side of the auxiliary arm connection member and to restrict separation from the auxiliary arm connection member based on rotation of the auxiliary arm; wherein a flow hole through which the water flows is formed at the auxiliary arm connection member; and wherein the water flowing through the transfer flow passage is introduced into the auxiliary flow passage via the flow hole.

24 . The dishwasher according to claim 23 , wherein the auxiliary arm connection member comprises:
a flow tube disposed at the main arm and configured to communicate with the transfer flow passage and the auxiliary flow passage; a shaft inserted into the auxiliary flow passage; a protrusion configured to extend from the shaft; and at least one or more support ribs configured to connect the flow tube to the shaft.

Assignees

• Lg Electronics Inc

Inventors

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

Classifications

• A47L15/23

  moved by means of the sprays · CPC title

• A47L15/22 Primary

  Rotary spraying devices · CPC title

• A47L15/428 Primary

  Rotary nozzles · CPC title

• A47L2501/20

  Spray nozzles or spray arms · CPC title

• A47L15/20 Primary

  Swingable spraying devices · CPC title