# US 11,441,684 B2 · Sealing cover element in a mechanical seal

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,441,684 B2
- Document ID: US11441684B2
- Status: Granted
- Kind: B2
- Application number: 16/844,353
- Filed: 2020-04-09
- Published: 2020-10-15
- Granted: 2022-09-13
- Earliest claimed: 2019-04-10
- Assignees: A.W. Chesterton Company
- Applicants: A.W. Chesterton Company
- Inventors: Josef Fichtner; Pierre Aouni Alfons Al-Darra
- Web page: https://patentgrep.com/patent/US11441684B2

## CPC

- F16J 15/3284: characterised by their structure; Selection of materials
- F16J 15/3464: {Mounting of the seal}
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS

## Abstract

A mechanical seal that includes a holder assembly having a fastener-receiving aperture formed therein and having a pair of grooves disposed on either side of the fastener-receiving aperture. A sealing cover element is disposed over the fastener-receiving aperture and has opposed leg portions that seat within the groove.

## Claims

### Claim 1

A mechanical seal for mounting about a shaft, comprising
a holder assembly having
a main body having an inner surface and an opposed outer surface, wherein the main body has one or more fastener-receiving apertures formed therein and extending between the inner surface and the outer surface and being sized and configured for seating a fastener,
first and second grooves formed in the outer surface, wherein the first groove is formed on one side of the fastener-receiving aperture and the second groove is formed on the other side of the fastener-receiving aperture,
a rotary seal ring coupled to the holder assembly,
a stationary seal ring disposed adjacent to the rotary seal ring, and
a sealing cover element having a main body having a first leg portion, an opposed second leg portion, and an intermediate portion disposed between and coupled to the first and second leg portions,
wherein the first leg portion of the sealing cover element is sized and configured for seating within the first groove, the second leg portion of the sealing cover element is sized and configured for seating within the second groove, and the intermediate portion of the sealing cover element covers the fastener-receiving aperture,
wherein the intermediate portion of the sealing cover element has a top surface and an opposed bottom surface, and the first and second leg portions each have a top surface and an opposed bottom surface, wherein the top surface of the intermediate portion is radially spaced from the top surface of the first and second leg portions.

### Claim 2 (depends on 1)

The mechanical seal of claim 1, wherein the bottom surface of the first and second leg portions is radially spaced from the bottom surface of the intermediate portion.

### Claim 3 (depends on 1)

The mechanical seal of claim 1, wherein the sealing cover element is formed from an elastomer material.

### Claim 4 (depends on 1)

The mechanical seal of claim 1, wherein the sealing cover element 110 has an annular shape.

### Claim 5 (depends on 1)

The mechanical seal of claim 1, wherein the inner surface of the holder assembly includes a first sealing groove for seating a first sealing element and an axially spaced second sealing groove for seating a second sealing element.

### Claim 6 (depends on 1)

The mechanical seal of claim 1, wherein the first groove is formed on one side of the fastener-receiving aperture and the second groove is formed on the other side of the fastener-receiving aperture.

### Claim 7 (depends on 6)

The mechanical seal of claim 6, further comprising a first sealing element positioned for contacting the shaft and a second sealing element positioned for contacting the stationary seal ring.

### Claim 8

A mechanical seal for mounting about a shaft, comprising
a holder assembly having
a main body having an inner surface and an opposed outer surface, wherein the main body has one or more fastener-receiving apertures formed therein and extending between the inner surface and the outer surface and being sized and configured for seating a fastener,
first and second grooves formed in the outer surface, wherein the first groove is formed on one side of the fastener-receiving aperture and the second groove is formed on the other side of the fastener-receiving aperture,
a rotary seal ring coupled to the holder assembly,
a stationary seal ring disposed adjacent to the rotary seal ring, and
a sealing cover element having a main body having a first leg portion, an opposed second leg portion, and an intermediate portion disposed between and coupled to the first and second leg portions,
wherein the first leg portion of the sealing cover element is sized and configured for seating within the first groove, the second leg portion of the sealing cover element is sized and configured for seating within the second groove, and the intermediate portion of the sealing cover element covers the fastener-receiving aperture, and
wherein the first groove is formed on one side of the fastener-receiving aperture and the second groove is formed on the other side of the fastener-receiving aperture.