EP 0365695 B1 19921125 - POSITIVE DISPLACEMENT TWIN-SHAFT VACUUM PUMP
Title (en)
POSITIVE DISPLACEMENT TWIN-SHAFT VACUUM PUMP
Publication
Application
Priority
EP 88117651 A 19881024
Abstract (en)
[origin: EP0365695A1] The invention relates to a two-shaft vacuum pump (1) having a pair of claw rotors (4, 5; 6, 7; 8, 9) rotating in a drawing chamber (11, 12, 13), which pair forms together with the drawing chamber wall a suction side (47) and a pressure side (48); in order to prevent solid particles which have entered in the drawing chamber from being deposited, it is proposed to arrange on the pressure side (48) of the drawing chamber (11, 12, 13) the port (49) of a purge gas line (52, 53); with the aid of a purge gas fed through the port (49), the particles can be held suspended and conveyed out. <IMAGE>
IPC 1-7
IPC 8 full level
F04C 25/02 (2006.01); F04C 29/00 (2006.01)
CPC (source: EP US)
F04C 13/005 (2013.01 - EP US); F04C 18/123 (2013.01 - EP US); F04C 23/001 (2013.01 - EP US); F04C 29/0007 (2013.01 - EP US); F04C 2220/12 (2013.01 - EP US); F04C 2280/02 (2013.01 - EP US)
Citation (examination)
EP 0338764 A2 19891025 - BOC GROUP PLC [GB]
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0365695 A1 19900502; EP 0365695 B1 19921125; DE 3876243 D1 19930107; JP H02153292 A 19900612; US 5046934 A 19910910
DOCDB simple family (application)
EP 88117651 A 19881024; DE 3876243 T 19881024; JP 27511989 A 19891024; US 48185390 A 19900220