Patent · US Expired

Pressure controlled cutter bit retainer with precision adjustable cutter bit

US5116171A · kind A · utility

8Cited by

8References

4Claims

0Family size

Assignee

SAMSON AKTIENGESELLSCHAFT · DE

Inventors

Wilfried Gerk · Rödermark, DE
Hartmut Hirt · Gelnhausen, DE
Gerhard Klee · Frankfurt, DE

Key dates

Filing date	Sep 5, 1990
Grant date	May 26, 1992
Priority date	—
Expiry date	Sep 5, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/85
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A pressure controlled cutter bit or drill bit retainer in the form of a revolving drill head with hydraulic precision adjustment of the drill bit arranged at a central extension, which is displaceable from its original position by small amounts around a pivot axis by a pressure motor, wherein this displacement occurs without any parts mechanically rubbing against each other and the dimensioning of the pressure motor and extension defining the transmission ratio conditions are selected in such a way that the travel of the drill bit guided along a curved path is greater than the travel of the pressure motor output produced by volume change, and wherein the overall volume of the pressure motor is selected to be slightly greater than the volume required for moving the pressure motor output.

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