EP 1402975 A1 20040331 - Method of manufacturing vacuum pump rotors, and rotors obtained thereby
Title (en)
Method of manufacturing vacuum pump rotors, and rotors obtained thereby
Title (de)
Verfahren zur Herstellung eines Drehkolbens für eine Vakuumpumpe und nach diesem Verfahren hergestellter Drehkolben
Title (fr)
Procedé de fabrication d'un rotor de pompe à vide et rotor ainsi obtenu
Publication
Application
Priority
IT TO20020770 A 20020906
Abstract (en)
The method involves obtaining one or more sets of radial peripheral vanes on a cylindrical billet (11). The cylindrical billet is obtained through an axial compression (P1) by forging. A cavity (13) extending over a part of the billet is formed using a punch (12) that is forced into the cylindrical billet. The billet is bored and is then submitted to heat treatment. An independent claim is also included for a rotor for a turbine pump.
IPC 1-7
IPC 8 full level
B21K 1/36 (2006.01); B21K 3/04 (2006.01); F04D 19/04 (2006.01); F04D 29/32 (2006.01)
CPC (source: EP US)
B21K 1/36 (2013.01 - EP US); B21K 3/04 (2013.01 - EP US); F04D 19/042 (2013.01 - EP US)
Citation (search report)
- [X] EP 0818548 A1 19980114 - MITSUBISHI HEAVY IND LTD [JP]
- [A] US 2080641 A 19370518 - TEMPLIN RICHARD L
- [PX] PATENT ABSTRACTS OF JAPAN vol. 2003, no. 02 5 February 2003 (2003-02-05)
- [X] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 10 17 November 2000 (2000-11-17)
- [X] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 12 3 January 2001 (2001-01-03)
- [A] PATENT ABSTRACTS OF JAPAN vol. 0070, no. 79 (M - 204) 31 March 1983 (1983-03-31)
- [A] PATENT ABSTRACTS OF JAPAN vol. 0143, no. 75 (M - 1010) 14 August 1990 (1990-08-14)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1402975 A1 20040331; IT TO20020770 A1 20040307; JP 2004263687 A 20040924; US 2004175261 A1 20040909
DOCDB simple family (application)
EP 03017613 A 20030811; IT TO20020770 A 20020906; JP 2003315745 A 20030908; US 65523503 A 20030904