Global Patent Index - EP 2194275 B1

EP 2194275 B1 20180822 - Lobe type vacuum pump

Title (en)

Lobe type vacuum pump

Title (de)

Wälzkolbenvakuumpumpe

Title (fr)

Pompe à vide à lobes

Publication

EP 2194275 B1 20180822 (DE)

Application

EP 09014528 A 20091120

Priority

DE 102008060540 A 20081204

Abstract (en)

[origin: EP2194275A2] The pump has a piston connected with a shaft, which are provided with bearings. A drive is shifted in rotation with the shaft. A hollow space (80) is provided in the shaft that is provided with two shaft journals (62, 63), which are arranged at ends of the piston. A longitudinal bar (66) is arranged between the shaft journals. A releasing structure is provided between the bearings and the piston. An unseparated and hollow inner area (82) is provided in the piston, where the hollow space is arranged in the inner area.

IPC 8 full level

F04C 18/12 (2006.01); F04C 28/28 (2006.01)

CPC (source: EP)

F04C 18/126 (2013.01); F04C 28/28 (2013.01); F04C 2240/20 (2013.01); F04C 2240/60 (2013.01)

Citation (examination)

US 2048249 A 19360721 - OTTO ELWERT

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DOCDB simple family (publication)

EP 2194275 A2 20100609; EP 2194275 A3 20140903; EP 2194275 B1 20180822; DE 102008060540 A1 20100610

DOCDB simple family (application)

EP 09014528 A 20091120; DE 102008060540 A 20081204