Tool driving or impacting – Means to drive tool about an axis – Means to hold and relatively rotate sections of tool shaft
Patent
1976-05-21
1978-05-30
Purser, Ernest R.
Tool driving or impacting
Means to drive tool about an axis
Means to hold and relatively rotate sections of tool shaft
128 92EB, 173170, 279 51, A61B 1716
Patent
active
040918807
ABSTRACT:
A portable surgical wire inserting instrument comprising a housing defining a handle and a head casing. The housing handle holds a removable power pack in which is mounted a motor and a source of power electrically connected to the motor. A miter gear extends from the power pack and is connected by a drive shaft to the motor. A collet is mounted in the housing and is selectively adjusted to grip a plurality of different diameter surgical wires through the action of a knob and cam mechanism located on top of the instrument head.
Rotation of the knob to one of a number of different positions establishes a number of different positions for the pivot points of thrust bars which act upon pins to draw the collet into an internally coned tube. Each position corresponds to a location of the thrust bar pivots suitable for gripping wires of different sizes. Gripping of the wire is accomplished by rotating a cam which moves the thrust bars rearward against pins which move a draw tube rearward and further draws the collet into the internally coned tube causing the jaws of the collet to squeeze in and grip the surgical wire. A miter gear on the coned tube connects with the miter gear extending from the power pack with the gears being adapted to rotate the coned tube upon energization of the motor.
REFERENCES:
patent: 2297174 (1942-09-01), Tabb et al.
patent: 2448423 (1948-08-01), Dodge
patent: 3109238 (1963-11-01), Marks
patent: 3325899 (1967-06-01), Staunt
patent: 3499223 (1970-03-01), Lieb et al.
patent: 3509629 (1970-05-01), Kidokoru
patent: 3724563 (1973-04-01), Wickham et al.
patent: 3813782 (1974-06-01), Nilles
patent: 3883789 (1975-05-01), Achenbach
Foltz Carl L.
Trott Arthur F.
Troutner Vernon H.
Concept Inc.
Pate III William F.
Purser Ernest R.
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