Pneumatic percussion tool, especially for the preparation of bon

Details Pneumatic percussion tool, especially for the preparation of bon Pneumatic percussion tool, especially for the preparation of bon

1990-11-13

1992-10-06

Yost, Frank T.

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

173 91, 173135, 173211, 91234, B25D 1706

Patent

active

051523523

ABSTRACT:
A piston is oscillating periodically within a cylinder, propelled by compressed air. At at least one of its end positions, the piston generates a stroke that acts on a working tool, e.g. a rasp. The sizes of the piston surfaces acted upon by the compressed air and the capacities at the cylinder volumes limited by the piston are dimensioned such that the impact momentum of the piston at both end positions is essentially the same. In case of a bone rasp working tool this equal momentum of the stroke advancing the rasp into the bone and the stroke loosening the tool by retracting it, leads to an optimum working of the bone and as little stress as possible on the patient.

REFERENCES:
patent: 1264318 (1918-04-01), McGrath
patent: 1440731 (1923-01-01), Gartin
patent: 2426409 (1947-08-01), O'Farrell
patent: 2440457 (1948-04-01), Beckwith
patent: 3583499 (1971-06-01), Cordes
patent: 4114950 (1978-09-01), Cooper
patent: 4651833 (1987-03-01), Karpf et al.

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