PULSATOR FOR WASHING MACHINE

• US 20140076004A1
• Filed: 10/05/2012
• Published: 03/20/2014
• Est. Priority Date: 10/06/2011
• Status: Abandoned Application

• Current Assignee: Dongbu Daewoo Electronics Corporation
• Original Assignee: Dongbu Daewoo Electronics Corporation
• Inventors: Lee, Ju Dong
• Application Number:
  US14/119,105
• Publication Number:
  US 20140076004A1
• Time in Patent Office: Days
• US Class Current: 68/134
• CPC Class Codes: D06F 17/10 Impellers

Abstract

A pulsator for a washing machine includes a base; a rotating shaft positioned at a center of the base; a washing protrusion supported by the base, connected to the rotating shaft, and that protrudes upward; and a curved surface portion supported by the based, and having convex and concave curved surfaces in succession thereon.

Claims

1. A pulsator for a washing machine, comprising:

a base;

a rotating shaft positioned at a center of rotation of the base;

a washing protrusion supported by the base connected to the rotating shaft and protruding upward; and

a curved surface portion supported by the base, having convex and concave curved surfaces in succession thereon.

2. The pulsator of claim 1, wherein the washing protrusion is on the curved surface portion.

3. The pulsator of claim 1, wherein the base comprises:

a base body having a circular ring shape surrounding the curved surface portion; and

a rib member connecting the base body and the rotating shaft and supporting the curved surface portion.

4. The pulsator of claim 3, wherein the washing protrusion comprises:

a first washing protrusion that protrudes in a spiral shape from the rotating shaft toward the base body; and

a second washing protrusion that is rotationally symmetrical with the first washing protrusion around the rotating shaft, and that protrudes in a spiral shape from the rotating shaft toward the base body.

5. The pulsator of claim 4, wherein the first washing protrusion comprises:

a first wing member connected to the rotating shaft and that protrudes upward;

a first concave side portion having a concave side surface at the first wing member; and

a first convex side portion having a convex side surface at the first wing member.

6. The pulsator of claim 5, wherein the second washing protrusion comprises:

a second wing member that is rotationally symmetrical with the first washing wing member around the rotating shaft, connected to the rotating shaft, and that protrudes upward;

a second concave side portion having a concave side surface fat the second wing member; and

a second convex side portion having a convex side surface at the second wing member.

7. The pulsator of claim 6, wherein the curved surface portion comprises:

a first rotation guide having one side in a concave curved shape and another side in a convex curved shape;

a first rising guide having one side connected to the first rotation guide and in a convex curved shape and another side in a concave curved shape;

a second rotation guide having one side connected to the first rising guide and in a concave curved shape and another side formed in a convex curved shape; and

a second rising guide having one side connected to the second rotation guide and in a convex curved shape and another side connected to the first rotation guide and in a concave curved shape.

8. The pulsator of claim 7, wherein an inclined angle between the first rotation guide and the base body is equal to an inclined angle between the second rotation guide and the base body.

9. The pulsator of claim 8, wherein an inclined angle between the first rising guide and the base body is equal to an inclined angle between the second rising guide and the base body.

10. The pulsator of claim 9, wherein the inclined angle between the first rotation guide and the base body is smaller than the inclined angle between the first rising guide and the base body.

11. The pulsator of claim 7, further comprising an auxiliary protrusion separate from the rotating shaft and on the curved surface.

12. The pulsator of claim 11, wherein the auxiliary protrusion comprises:

a first auxiliary wing at a connection between the first rotation guide and the second rising guide; and

a second auxiliary wing that is rotationally symmetrical with the first auxiliary wing around the rotating shaft, and at a connection between the second rotation guide and the first rising guide.

13. The pulsator of claim 12, wherein each of the first and second auxiliary wings protrudes in a spiral shape from the rotating shaft toward the base body.

14. The pulsator of claim 11, further comprising a guide protrusion on the curved surface portion, between the washing protrusion and the auxiliary protrusion, which protrudes in a spiral shape from the rotating shaft toward the base body.