GPI coverage and content

You can use Global Patent Index (GPI) to carry out detailed searches in the EPO's worldwide bibliographic (DOCDB), legal event (INPADOC) and full-text data sets, and download or visualise the search results for statistical analysis.

Current content: 159 823 134 patent documents

This week's update (15/11/2024 12:00 CET):

143 307 new documents added

1 003 170 documents amended

GPI key values

Run regular monitoring (e.g. monthly or quarterly) of technical areas or companies

Use built-in charts to visualise technical trends and patenting activity of companies

Choose the data you want to see and download to focus on what you are interested in

Run data quality assessments to measure the risk of incomplete search results

EP 0320795 B1 19910710 - VANE-TYPE VACUUM PUMP

Title (en)

VANE-TYPE VACUUM PUMP

Publication

EP 0320795 B1 19910710 (DE)

Application

EP 88120517 A 19881208

Priority

DE 3742277 A 19871212

Abstract (en)

[origin: EP0320795A2] For the operation of servo drives in motor vehicles, oil-lubricated vane-type vacuum pumps are used. In order to reduce the oil consumption and to improve the output, the rotor (5) is supported on one side and provided with an internal bore (21) extending from the free end. In this way a vacuum is produced in the internal bore (21) which is approximately as great as in the intake chamber. <IMAGE>

IPC 1-7

F04C 18/344; F04C 29/02

IPC 8 full level

F04C 18/344 (2006.01); F04C 29/02 (2006.01)

CPC (source: EP)

F04C 18/3441 (2013.01); F04C 29/02 (2013.01); F04C 2220/10 (2013.01)

Citation (examination)

DE 3519741 A1 19860102 - BARMAG BARMER MASCHF [DE]

Designated contracting state (EPC)

CH DE ES FR GB IT LI

DOCDB simple family (publication)

EP 0320795 A2 19890621; EP 0320795 A3 19900207; EP 0320795 B1 19910710; DE 3863633 D1 19910814; ES 2022973 B3 19911216

DOCDB simple family (application)

EP 88120517 A 19881208; DE 3863633 T 19881208; ES 88120517 T 19881208