Title:
MONOBLOC HOUSING FOR VACUUM PUMP
Document Type and Number:
WIPO Patent Application WO2002006675
Kind Code:
A3
Abstract:
The invention concerns a pumping unit wherein the vacuum pump (100) is driven by a motor (3, 4) comprised in a common monobloc housing forming motor housing (5) and oil pan (18) containing a gear assembly (17) for coupling two parallel pump rotors (14). To complement the sealing conditions provided by a dynamic seal (6), the motor stator (4) consists of an electric coil embedded in an oil-tight and gas-tight resin, thereby not requiring other more expensive and bulky sealing means, reducing production cost and enhancing the pumping unit dependability.
Inventors:
RIVAL JEAN-LUC (FR)
CACARD ALBERT (FR)
HOUZE FRANCOIS (FR)
CACARD ALBERT (FR)
HOUZE FRANCOIS (FR)
Application Number:
PCT/FR2001/002314
Publication Date:
March 14, 2002
Filing Date:
July 17, 2001
Export Citation:
Assignee:
CIT ALCATEL (FR)
RIVAL JEAN LUC (FR)
CACARD ALBERT (FR)
HOUZE FRANCOIS (FR)
RIVAL JEAN LUC (FR)
CACARD ALBERT (FR)
HOUZE FRANCOIS (FR)
International Classes:
F04D29/08; F01C21/10; F04C23/00; F04C29/00; F04C29/04; F04D29/00; F04D29/053; (IPC1-7): F04C23/00; F04C29/00; F04C29/04
Foreign References:
| US6002185A | 1999-12-14 | |||
| US2940661A | 1960-06-14 | |||
| US5904473A | 1999-05-18 | |||
| EP0733804A2 | 1996-09-25 | |||
| US4384226A | 1983-05-17 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04 30 April 1996 (1996-04-30)
PATENT ABSTRACTS OF JAPAN vol. 010, no. 134 (M - 479) 17 May 1986 (1986-05-17)
PATENT ABSTRACTS OF JAPAN vol. 010, no. 134 (M - 479) 17 May 1986 (1986-05-17)
Download PDF:
Previous Patent: GEAR PUMP INCLUDING CERAMIC GEARS AND SEAL
Next Patent: HYDRAULIC SYSTEM FOR A WORKING MACHINE THAT COMPRISES A SPECIAL CONSUMER
Next Patent: HYDRAULIC SYSTEM FOR A WORKING MACHINE THAT COMPRISES A SPECIAL CONSUMER