# US 5,701,767 A · Pulsator for a washing machine

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- Number: US 5,701,767 A
- Document ID: US5701767A
- Status: Granted
- Kind: A
- Application number: 08/670,562
- Filed: 1996-06-27
- Granted: 1997-12-30
- Earliest claimed: 1995-06-30
- Assignees: Daewood Electronics Co., Ltd.
- Inventors: In-Su Cho
- Web page: https://patentgrep.com/patent/US5701767A

## CPC

- D06F 17/10: Impellers
- D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES

## Abstract

Disclosed is a pulsator for a washing machine capable of preventing generation of a concentric waterflow such as a heart-type waterflow. The pulsator includes a base plate fixed to the shaft housing, a plurality of plate-shaped wings radially fixed to the upper surface of the base plate and for forming a concentric waterflow in the washing water, a plurality of cover plates fixed on the multi-stepped edges of the plurality of plate-shaped wings, a plurality of protrusions radially and in a certain length formed on the upper surface of each of the plurality of cover plates and for generating a waterflow of the washing water vertically oriented toward the top of the washing tub by being rotated according to the rotation of the base plat.

## Claims

### Claim 1

A pulsator for a washing machine mounted in a washing tub and for generating a waterflow in washing water in the washing tub by a rotation according to a rotation of a shaft housing, comprising:
a base plate fixed to the shaft housing to be rotated according to a rotation of the shaft housing;
a plurality of plate-shaped wings radially fixed to the upper surface of the base plate so as to be rotated according to the rotation of the base plate, and for forming a concentric waterflow in the washing water, each of the plurality of plate-shaped wings having a multi-stepped edge;
a plurality of cover plates fixed on the multi-stepped edges of the plurality of plate-shaped wings, each being a disc-shaped plate having a hole in the center portion;
a plurality of protrusions radially and in a certain length formed on the upper surface of each of the plurality of cover plates, and for generating a waterflow of the washing water vertically oriented toward the top of the washing tub by being rotated according to the rotation of the base plate.

### Claim 2 (depends on 1)

The pulsator as claimed in claim 1, wherein the base plate is a plate having a disc shape.

### Claim 3 (depends on 1)

The pulsator as claimed in claim 1, wherein a height of each of the plurality of plate-shaped wings is progressively increased from the center of the base plate to the outer periphery of the base plate with respect to the base plate.

### Claim 4 (depends on 1)

The pulsator as claimed in claim 1, wherein each of the plurality of protrusions is formed in a rectangular bar shape.

### Claim 5 (depends on 1)

The pulsator as claimed in claim 1, wherein each of the plurality of protrusions is formed in a conical shape.

### Claim 6 (depends on 1)

The pulsator as claimed in claim 1, wherein each of the plurality of protrusions is formed in a combination of the rectangular bar and the conical shapes.