Alcatel

Alcatel Cit

Rainer Mathes

Olivier Dauvillier

André Bouille

Eric Dulac

Christian Savry

Jean-Marc Poncet

Alain Ravex

Guy Gorinas

A fastener system with a coaxial annular flange () having through holes (), each serving to pass a screw () for screwing into an associated tapped hole () in the wall () of a stationary structure. Each through hole () has a circularly cylindrical distal segment () followed by an enlarged proximal segment () adjacent to the wall () of the stationary structure, allowing the shank () of the screw to bend and enabling a corresponding lateral offset (D). This prevents the screw () rupturing under high shear forces due to accidental destruction of a vacuum pump rotor while rotating at full speed.

Device for fixing a vacuum pump

A secondary pump unit comprising a mechanical secondary pump and a cryogenic trap, wherein the cryogenic trap forms a ring surrounding the outside of the mechanical secondary pump at its intake end, and the trap is enclosed in a casing defining, in parallel, the intake opening of the mechanical pump and of the cryogenic trap.

Secondary pump unit

Growing community of inventors

St. Julien En Genevois, France

Rainer Mathes