# US 5,352,506 A · Diaphragm

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- Number: US 5,352,506 A
- Document ID: US5352506A
- Status: Granted
- Kind: A
- Application number: 08/020,403
- Filed: 1993-02-22
- Granted: 1994-10-04
- Earliest claimed: 1992-02-26
- Assignees: Sumitomo Rubber Industries, Ltd.
- Inventors: Nobuhiro Sowa
- Web page: https://patentgrep.com/patent/US5352506A

## CPC

- F16J 3/02: Diaphragms
- Y10T 428/21: Circular sheet or circular blank
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention is intended to improve the durability and durability of a diaphragm of centrally convex form. A diaphragm comprises a substantially circular woven base fabric (1) formed of warp yarns (1a and 1a') radially extending in centrally convex form from the central region and weft yarns (1b) helically interwoven with the warp yarns (1a), and a rubber member (2) of centrally convex membrane form molded integrally with the base fabric (1).

## Claims

### Claim 1

A diaphragm comprising a woven substantially circular base fabric formed of warp yarns radially extending in centrally convex form from the center of the fabric and weft yarns helically interwoven with said warp yarns, and a rubber member of centrally convex membrane form molded integrally with said base fabric.

### Claim 2 (depends on 1)

A diaphragm as recited in claim 1 further including additional warp yarns extending outwardly from an intermediate region of said base fabric.

### Claim 3 (depends on 2)

A diaphragm as recited in claim 2 wherein said additional warp yarns are tied together in the intermediate region of the base fabric by a tying string.