# US 4,394,021 A · Contact sealing

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- Number: US 4,394,021 A
- Document ID: US4394021A
- Status: Granted
- Kind: A
- Application number: 06/235,858
- Filed: 1981-02-19
- Granted: 1983-07-19
- Earliest claimed: 1980-02-25
- Assignees: Luossavaara-Kiirunavaara AB
- Inventors: Jouni A. Merila
- Web page: https://patentgrep.com/patent/US4394021A

## CPC

- F16J 15/24: with radially or tangentially compressed packing
- F16J 15/3436: {Pressing means}
- F16J 15/46: with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings (connection of valves to inflatable elastic bodies B60C29/00; {for sealing arrangements in vehicles B60J10/244; for sealing arrangements of openings in buildings E06B7/2318}; for tube connections F16L)
- Y10S 277/903: Seal for rotating kiln or drum
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A contact sealing for adaptive abutment to a rotating sealing surface is provided with an annular groove, in which a pressurized hose is located which abuts a sealing member and presses the same against the sealing surface.

## Claims

### Claim 1

A contact sealing for sealing an annular space between two relatively rotating members, particularly for sealing a material flow to a rotary drum from an opening in a stationary wall, one of the members being provided with an annular sealing surface and the other member being provided with an annular bottoming groove facing the sealing surface of said one member, the bottoming groove receiving a closed pressurized flexible and expandable annular hose and an annular sealing member, said sealing member being force-engaged by said hose to seal about said sealing surface, said sealing member being a flexible strip, having two ends respectively being provided with a groove and a tongue, the groove and tongue being interconnected and secured by an axial stud, and the stud in turn being secured to said other member.