Combination drilling and skiving tool
AssigneeThe United States of America as represented by the United States Department of Energy
InventorWilliam J. Stone
Life of this patent
Estimating the term…
Abstract
A combination drilling and skiving tool including a longitudinally extending hollow skiving sleeve slidably and concentrically mounted on a right-handed twist drill. Dogs or pawls provided on the internal periphery of the skiving sleeve engage with the helical grooves of the drill. During a clockwise rotation of the tool, the drill moves downwardly and the sleeve translates upwardly, so that the drill performs a drilling operation on a workpiece. On the other hand, the drill moves upwardly and the sleeve translates downwardly, when the tool is rotated in a counter-clockwise direction, and the sleeve performs a skiving operation. The drilling and skiving operations are separate, independent and exclusive of each other.
Claims12
A combination drilling and skiving tool comprising:
- (a) a twist drill rotatable in a first direction for performing a drilling operation, said twist drill having an axially aligned shaft portions and helically-grooved drilling portion;
- (b) skiving means operably associated with said twist drill and rotatable in a second direction for performing a skiving operation, said skiving means comprising a hollow longitudinal sleeve concentrically mounted on for movement along said twist drill, said sleeve including at least one dog member radially extending into and slidably engaging with said grooved drilling portions;
- (c) said skiving means being axially translatable on said twist drill such that when the tool is rotated in the first direction said dog member carries said skiving means towards said shaft portion and said twist drill performs a drilling operation, and when the tool is rotated in the second directon said dog member carries and skiving means away from said shaft portion and said skiving means perform a skiving operation independent and exclusive of the drilling operation.
A combination drilling and skiving tool comprising:
- (a) a twist drill having a shaft portion including an axially extending radial groove and a helically grooved portion;
- and
- (b) a generally hollow longitudinal sleeve detachably mounted on said twist drill and axially translatable thereon, said sleeve including a dog member extending radially into said extending groove to limit axial movement of said sleeve, and first and second opposed pawl members extending radially into said helically grooved portion;
- (c) whereby when the tool is rotated in a first direction said twist drill performs a drilling operation, and when the tool is rotated in a second direction said sleeve performs a skiving operation independent and exclusive of the drilling operation.
Dependencies are inferred from the claim text.