Back to results
US RE37,358 E1Granted
Tool holding mechanism for a motor driven surgical instrument
AssigneeThe Anspach Effort, Inc.
InventorsEddy H. Del Rio, William E. Anspach, Jr.
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeThe Anspach Effort, Inc.
InventorsEddy H. Del Rio, William E. Anspach, Jr.
Estimating the term…
A surgical instrument has a housing which contains a motor that drives a spindle. A tool bit is attached to the motor by a holder that includes a body with a first end portion connected to the spindle, a central portion with a cavity therein, and a second end portion having an aperture through which a shaft of the tool bit passes into the cavity. A pair of lock pawls are pivotally mounted in the cavity with each one having a first tab that enters a slot in the shaft when the lock pawls are in a first position to hold the tool bit in the instrument. The first tabs retract from the slot when the lock pawls are in a second position for changing the tool bit. The lock pawls have second tabs that engage a restrainer only in the second position to prevent the body from rotating. A ring extends around the body and pivots the lock pawls between the first and second positions when the ring moved longitudinally along the body. A manually operable shift lever is pivotally coupled to the housing and move the ring longitudinally along the body.
A tool bit for a motor driven instrument having a housing with at least one movable lock pawl, said tool bit comprising:
A tool bit for a motor driven instrument having a housing with movable lock pawls, said tool bit comprising:
A tool bit for a motor driven instrument having a housing with lock pawls movable into and out of driving engagement with said tool bit, said tool bit comprising:
A tool bit for a motor driven instrument having a housing with lock pawls movable into and out of driving engagement with said tool bit, said tool bit comprising:
Dependencies are inferred from the claim text.