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1. (WO2018145795) OIL-FREE VACUUM PUMP HAVING A PRISMATIC PISTON AND CORRESPONDING COMPRESSOR

Pub. No.:    WO/2018/145795    International Application No.:    PCT/EP2017/082202
Publication Date: Fri Aug 17 01:59:59 CEST 2018 International Filing Date: Tue Dec 12 00:59:59 CET 2017
IPC: F04B 39/00
F04B 35/01
F04B 7/04
F04B 9/04
F04B 27/04
F04B 53/12
Applicants: NIDEC GPM GMBH
Inventors: PAWELLEK, Franz
NICKEL, Conrad
Title: OIL-FREE VACUUM PUMP HAVING A PRISMATIC PISTON AND CORRESPONDING COMPRESSOR
Abstract:
The invention relates to an oil-free vacuum pump for evacuating gaseous media, comprising: an electric motor (4) which drives a shaft (3); a pump housing (1) having a pump chamber (10), as well as an inlet (15) and an outlet (16); a prismatic displacement piston (2) which is accommodated in the pump chamber (10) such that it is bidirectionally active and can be moved on a reciprocal working section; and at least one pressure valve (20) which releases an outflow of a gaseous medium out of the pump chamber (10) through the outlet (16) and blocks an inflow into the pump chamber (10). The displacement piston (2) has a slot (23) into which a drive force of the shaft (3) is introduced via a crankpin (33) by means of a rolling bearing (31).