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US 4,160,717 AGranted
Electric contact post for electrochemical machine
AssigneeRegie Nationale des Usines Renault
InventorsGerard Navaro, Jean-Pierre Maillard, Serge Lacroix
Life of this patent
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Abstract
An electric contact post resistant to heating at the contact in electrochemical machining operations. The post tip, of heat-resistant alloy, slides partially in a sleeve of metallic alloy resistant to heat and corrosion, held in the corresponding post of the post guide hole made in a support of insulating material.
Claims5
In an electrochemical tool for machining a workpiece, an electric contact post comprising:
- a support of nonconducting material having a through hole;
- a current conducting guide rod slidable without play in said hole of said support;
- a sleeve of heat and corrosion resistant material disposed in one end of said hole of said support;
- a tip fixed to one end of said guide rod and slidable with sufficient play to avoid jamming in said sleeve;
- and
- a spring arranged to press said tip against said workpiece.
3 more elements
Dependencies are inferred from the claim text.