Forward and reverse rotary tool

Details Forward and reverse rotary tool Forward and reverse rotary tool

1979-01-02

1980-08-19

Feldbaum, Ronald

Tool driving or impacting

Means to drive tool about an axis

Means to hold and relatively rotate sections of tool shaft

192 21, 192 93A, 192 95, E21B 300, E21B 100

Patent

active

042179645

ABSTRACT:
Forward and reverse rotary tool, particularly for inserting and retracting a threaded element. The power-driven tool is designed primarily for surgical use and is capable of applying pressure against the free end of the threaded element during both the inserting and retracting operation, as into a bone. The shift from a driving mode to a retracting mode, or vice versa, is readily effected under conditions existing in an operating room. All movable and/or lubricated parts, other than the driven element, are housed to prevent leakage of lubricant. The tool comprises a unidirectionally driven pinion in constant engagement with a pair of counter-rotating clutch elements and means alternatively engageable with said clutch elements for rotative driving in one direction or the opposite direction.

REFERENCES:
patent: 2435536 (1948-02-01), Ferris
patent: 2602347 (1952-07-01), Miller
patent: 3539044 (1970-11-01), Grimstad
patent: 3756090 (1973-09-01), Meila et al.
patent: 4050528 (1977-09-01), Foltz
patent: 4091880 (1978-05-01), Troutner
patent: 4124026 (1978-11-01), Berner et al.
patent: 4159050 (1979-06-01), Hopkins et al.

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