Patent ID: 7137633
Filing Date: 2006-11-21
Classification: A61C,B23B,Y10T

Abstract:
1. A manual chuck operably connectable to a turbine and for tightening and loosening a burr powered thereby, said chuck comprising: a spindle including an elongated shaft portion positionable into an aperture of said turbine at a substantially vertical direction, said spindle further including a head portion integral with said shaft portion and having a centrally disposed threaded aperture formed therein, said spindle aperture extending substantially vertically and downwardly through said shaft portion and being aligned with said turbine aperture, said spindle aperture being countersunk with a top surface of said head portion, said head portion having an outer perimeter greater than a diameter of said turbine aperture; a locking member including a centrally disposed aperture and being substantially aligned with said spindle aperture, said locking member including a lower portion having a pair of opposed flat surfaces formed about a perimeter thereof, said locking member having a diameter greater than a diameter of said head portion and further having a bottom surface directly engaged with said head portion; a hollow chuck member having a tapered bottom end portion and a threaded top end portion for being secured within said spindle aperture, said tapered bottom end portion being selectively adjustable for receiving and maintaining a burr at a substantially stable position during operating conditions; a cap including an elongated pin portion extending vertically downward therefrom and being selectively positionable into said spindle aperture for engaging said chuck member; a plurality of spacers selectively positioned between said turbine aperture and said cap for maintaining a predetermined distance therebetween; and a plurality of flexible and coextensively shaped spring washers formed to be substantially resilient, one said plurality of spring washers for allowing said cap to be pushed downwardly to position said pin portion directly into said chuck member, another said plurality of spring washers for allowing said cap to be pushed downwardly to directly engage said locking member with said spindle so that said chuck member can be loosened and tightened and thereby allowing an operator to change a burr; wherein said locking member is intercalated between said spring washers such that said locking member maintains direct contact with one of said spacers and said head portion when said chuck member is tightened, said spring washers being vertically aligned and spaced apart during a compressed position.