Pressure controlled cutter bit retainer with precision adjustabl

Details Pressure controlled cutter bit retainer with precision adjustabl Pressure controlled cutter bit retainer with precision adjustabl

1990-09-05

1992-05-26

Schwartz, Larry I.

Cutting by use of rotating axially moving tool

Tool-support with means to move tool relative to tool-support

To move radially

408714, B23B 5100

Patent

active

051161710

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.

REFERENCES:
patent: 3007353 (1961-11-01), Garnett
patent: 3007356 (1971-11-01), Jones
patent: 3864054 (1975-02-01), Eysel
patent: 3977194 (1976-08-01), Klee et al.
patent: 4224846 (1980-09-01), Eysel et al.
patent: 4350054 (1982-09-01), Werth, Jr.
patent: 4443140 (1984-04-01), Boetto
patent: 4941782 (1990-07-01), Cock

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