Drill chucks
AssigneeThe Jacobs Manufacturing Company
InventorGeorge Cecil Derbyshire
Life of this patent
Estimating the term…
Abstract
A chuck for drills and the like including at least three jaw elements of tapered form connected to a jaw carrier by means of flexible elements. Means are provided for urging the jaw elements axially relative to a nose cone so that they act against a frusto-conical bore portion of said nose cone and are urged radially inwards, accompanied by flexing of the flexible elements, to grip the shank of a drill or the like.
Claims9
A drill chuck comprising at least three jaw elements each having a conical tapered exterior surface of diminishing radii in the direction of the end thereof, a jaw carrier;
- respective flexible elements connecting said jaw elements to said jaw carrier, said flexible elements each being coextensive in arcuate dimension with the maximum arcuate dimension of the conical jaw element to which it is connected;
- a nose cone having a frusto-conical bore portion;
- and means for urging said jaw elements axially relative to said nose cone so that the jaw elements act against the frusto-conical bore portion of the nose cone and are urged radially inwards, accompanied by flexing of the flexible elements, to grip the shank of a drill bit placed in the chuck.
A drill chuck comprising at least three jaw elements each having a conical tapered exterior surface of diminishing radii in the direction of the end thereof, a nose cone;
- a jaw carrier;
- respective flexible elements connnecting said jaw elements to said jaw carrier, said flexible elements each being coextensive in arcuate dimension with the maximum arcuate dimension of the conical jaw element to which it is connected;
- a nose cone having a frusto-conical bore portion, and means for urging said jaw elements axially relative to said nose cone, said means being constituted by screwthreaded adjustment means for adjusting the nose cone along the jaw carrier, so that the jaw elements act against the frusto-conical bore portion of the nose cone and are urged radially inwards, accompanied by flexing of the flexible elements, to grip the shank of a drill bit placed in the chuck.
Dependencies are inferred from the claim text.