Cryogenic Seal, Cold Head And Vacuum Pump

Abstract: A cryogenic seal for sealing between cooperating inner and outer cylindrical surfaces (8, 9) at cryogenic temperatures. The seal comprising: an elastic member (24) for biasing the seal towards one of the cylindrical surfaces; and a sealing member (21), wherein at least 95% by weight of the sealing member comprises: a polymer material that is not a per- or polyfluoroalkyl substance and at least one filler material, the polymer material making up at least 50% of the composition of the sealing member.

Patent Information

Application #

Filing Date

11 August 2026

Publication Number

33/2026

Publication Type

INA

Invention Field

MECHANICAL ENGINEERING

Status

Email

Parent Application

Applicants

1. LEYBOLD DRESDEN GMBH

Zur Wetterwarte 50/Haus 304, D-01109 Dresden

Inventors

1. KOSSEV, Iordan

Leybold Dresden GmbH Zur Wetterwarte 50/Haus 304, 01109 Dresden

Specification

Documents

Application Documents

#	Name	Date
1	202647096715-WIPO_PCT_DOC.pdf	2026-08-11
2	202647096715-STATEMENT OF UNDERTAKING (FORM 3) [11-08-2026(online)].pdf	2026-08-11
3	202647096715-PRIORITY DOCUMENTS [11-08-2026(online)].pdf	2026-08-11
4	202647096715-FORM 18 [11-08-2026(online)].pdf	2026-08-11
5	202647096715-FORM 1 [11-08-2026(online)].pdf	2026-08-11
6	202647096715-DRAWINGS [11-08-2026(online)].pdf	2026-08-11
7	202647096715-DECLARATION OF INVENTORSHIP (FORM 5) [11-08-2026(online)].pdf	2026-08-11
8	202647096715-COMPLETE SPECIFICATION [11-08-2026(online)].pdf	2026-08-11
9	202647096715-FORM-26 [13-08-2026(online)].pdf	2026-08-13
10	202647096715-PATENT_APPLICATION_PUBLICATION.pdf	2026-08-15