Global Patent Index - EP 1078166 A1

EP 1078166 A1 2001-02-28 - FRICTION VACUUM PUMP WITH A STATOR AND A ROTOR

Title (en)

FRICTION VACUUM PUMP WITH A STATOR AND A ROTOR

Title (de)

REIBUNGSVAKUUMPUMPE MIT STATOR UND ROTOR

Title (fr)

POMPE A VIDE A FRICTION DOTEE D'UN STATOR ET D'UN ROTOR

Publication

EP 1078166 A1 (DE)

Application

EP 98946450 A

Priority

  • DE 19821634 A
  • EP 9805802 W

Abstract (en)

[origin: DE19821634A1] The connection openings (36,37) lie in one plane end parallel to the rotor axis (15). The pump stages (12-14) lie to one side of the connections with stages (13,14) of larger diameter than the preceding stages (12,13) in which case the angle of the opening (36,37) plane is adapted to the increasing diameter in the direction of axis (15). The two openings form part of the general housing (2) and the first two stages (12,13) are turbo-molecular with rotors and stator designed to give high compression ratio in stage (11) and high vacuum in stage (13). Both stages (12,13) are spaced (a) by one third of the motor diameter. The diameter of connection (37) joined to gas inlet (38) amounts to twice the pump stage spacing specified (a).

IPC 1-7 (main, further and additional classification)

F04D 19/04; F04D 17/16

IPC 8 full level (invention and additional information)

F04D 17/16 (2006.01); F04D 19/04 (2006.01)

CPC (invention and additional information)

F04D 17/168 (2013.01); F04D 19/046 (2013.01)

Citation (search report)

See references of WO 9960275A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

DE 19821634 A1 19991118; AU 754944 B2 20021128; AU 9348198 A 19991206; CA 2332777 A1 19991125; CA 2332777 C 20071106; CN 1115488 C 20030723; CN 1292851 A 20010425; EP 1078166 A1 20010228; EP 1078166 B1 20030611; EP 1078166 B2 20070905; JP 2002515568 A 20020528; JP 4173637 B2 20081029; TW 370594 B 19990921; US 6435811 B1 20020820; WO 9960275 A1 19991125

INPADOC legal status


2016-07-29 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2008-01-18 [ET3] FR: TRANSLATION FILED ** DECISION CONCERNING OPPOSITION

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2004-10-13 [RAP2] TRANSFER OF RIGHTS OF AN EP GRANTED PATENT

- Owner name: LEYBOLD VACUUM GMBH

2004-04-21 [26] OPPOSITION FILED

- Opponent name: PFEIFFER VACUUM GMBH

- Effective date: 20040225

2004-04-09 [ET] FR: TRANSLATION FILED

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