# US 2018/0020837 A1 · Cushion

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- Number: US 2018/0020837 A1
- Document ID: US20180020837A1
- Status: Published application
- Kind: A1
- Application number: 15/651,549
- Filed: 2017-07-17
- Published: 2018-01-25
- Earliest claimed: 2016-07-19
- Inventors: Hsing-I CHENG
- Web page: https://patentgrep.com/patent/US20180020837A1

## CPC

- A47C 7/35: Combinations of different types of springs; Adjustable springs; Attachment of springs to other springs or to {the base} frame {; Springs for seat parts not provided for in other groups of this subclass}
- A47C 7/021: {Detachable or loose seat cushions}
- A47C 7/18: having foamed material included in cushioning part
- A47C 27/144: {inside the mattress or cushion}
- A47C 27/148: {of different resilience}
- A47C 27/15: consisting of two or more layers (A47C27/16 takes precedence)
- A47C: CHAIRS; SOFAS; BEDS

## Abstract

The present invention discloses a cushion for providing a user to sit on. The cushion includes a base layer, a seat layer and a supporting portion. The seat layer is configured on the base layer for providing the user to sit on. The supporting portion is configured between the base layer and the seat layer for supporting the user's ischial tuberosity. The seat layer is made with the material of the good covering shape, thus it can release user's upper body, hips and legs. Furthermore, by using the hard supporting portion for supporting the user's ischial tuberosities, the cushion makes the weight of the user's upper body be transmitted uniformly to the seat layer. Therefore, the cushion can prevent the user's hips and legs from some physical pains such as sore, ache, and pain due to long period of partial stress.

## Claims

### Claim 1

A cushion, comprising:
a supporting portion, for supporting a user; and
a seat layer, configured on the supporting portion for supporting the user;
wherein the hardness of the seat layer is less than the hardness of the supporting portion, the width of the supporting portion is greater than a distance between two ischial tuberosities of the user, and the width of the seat layer is greater than the width of hips of the user.

### Claim 2

A cushion, for providing a user to sit on, comprising:
a base layer;
a supporting layer, configured on the base layer, comprising a supporting portion and a pressure-releasing auxiliary portion, wherein the supporting portion is used for supporting the user's ischial tuberosity, and the pressure-releasing auxiliary portion has a central hole, and the supporting portion is set in the central hole; and
a seat layer, configured on the supporting layer for providing the user to sit on;
wherein the hardness of the seat layer is less than the hardness of the supporting portion, the width of the supporting portion is greater than a distance between two ischial tuberosities of the user, and the width of the seat layer is greater than the width of hips of the user.

### Claim 3 (depends on 2)

The cushion of claim 2, wherein the supporting portion comprises a central pressure-releasing portion and a supporting ring; the central pressure-releasing portion is set in the supporting ring; the user's ischial tuberosity is supported by the supporting ring; and the hardness of the central pressure-releasing portion is less than the hardness of the supporting ring.

### Claim 4 (depends on 3)

The cushion of claim 3, wherein the width of the central pressure-releasing portion is less than the distance between two ischial tuberosities of the user.

### Claim 5 (depends on 3)

The cushion of claim 3, wherein the material of the central pressure-releasing portion and the seat layer are the same, the cushion shows a cylindrical appearance, and the diameter of the cylindrical appearance is 38 cm.

### Claim 6 (depends on 1)

The cushion of claim 1, further comprising a base layer for supporting the supporting portion and the seat layer, wherein the cushion is used for providing the user to sit on or providing the user's waist, back or neck to rely on.

### Claim 7 (depends on 6)

The cushion of claim 6, wherein the hardness of the supporting portion is less than the hardness of the base layer.

### Claim 8 (depends on 7)

The cushion of claim 7, wherein the base layer is made of general foam, the supporting portion is made of general foam, and the seat layer is made of memory foam.

### Claim 9 (depends on 2)

The cushion of claim 2, further comprising a breathable layer configured on the seat layer for ventilating and perspiration, wherein the breathable layer is made of palm wire, hemp yarn or artificial breathable perspiration fiber filaments, and the thickness of the breathable layer is 1 cm.