Patent · US Expired

Machine for polishing and/or grinding

US5823863A · kind A · utility

1Cited by

6References

20Claims

0Family size

Assignee

Messer Griesheim GmbH · DE

Inventors

Roland Henneborn · Pulheim, DE
Peter Holz · Linnich, DE
Michael Lechner · Großheirath, DE
Wolfgang Volker · Tönisvorst, DE

Key dates

Filing date	Feb 28, 1997
Grant date	Oct 20, 1998
Priority date	—
Expiry date	Feb 28, 2017

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB24B55/02
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The prior art discloses machines which, for cooling the surface to be machined, have a gas supply line which opens into a gas outlet which is in the direct vicinity of the polishing disk. When CO.sub.2 is used as cooling gas, stoppages, which can be traced back to snow formation of the CO.sub.2, may occur in the line and in the gas outlet. In order to avoid blockages, the machine is assigned means for the supply of the liquid or supercritical CO.sub.2 which comprise a valve for regulating the throughflow quantity of the CO.sub.2 with an expansion nozzle, the valve being arranged inside the machine.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.