F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 17/16 (2006.01) F04D 19/04 (2006.01) F04D 29/08 (2006.01)
Patent
CA 2695506
The vacuum pump comprises a casing (10) closed by a vacuum cover (20). Between an end wall (14) of the casing (10) and the vacuum cover (20), a circuit board (16) is arranged for current feedthrough. The circuit board (16) is sealed by two sealing means (15,21) of different diameters so that an annular partial region (22) is on its outer side subjected to the atmospheric pressure and is on its inner side subjected to the vacuum. It is avoided that the circuit board (16) laterally projects beyond the contour of the casing (10).
L'invention concerne une pompe à vide comportant un carter (10) fermé par un couvercle sous vide (20). Entre une paroi frontale (14) du carter (10) et le couvercle sous vide (20) se trouve une plaquette (16) servant au passage du courant. La plaquette est rendue étanche par deux joints (15,21) de différents diamètres, de sorte qu'une partie annulaire (22) est soumise, à l'extérieur, à la pression atmosphérique, et à l'intérieur, au vide. La plaquette (16) ne doit pas dépasser latéralement du contour du carter (10).
Fetherstonhaugh & Co.
Oerlikon Leybold Vacuum Gmbh
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