Tapping spindle
OwnerTaizo Katoinventor
Life of this patent
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Abstract
This disclosure relates to a tapping spindle including an automatic depth control. The spindle includes coaxial, telescoping driving and driven cylinders, and axial slot-like openings are formed in the cylinders. A slidable roller fits in the openings and normally engages the cylinders. The openings are shaped so that the roller disengages the cylinders upon sufficient relative axial movement thereof, and means is provided to adjust the depth at which the disengagement occurs. A spring is also provided to absorb shock when the tap begins to bite into the workpiece.
Claims3
A tapping spindle comprising a first cylinder having a shank at the top thereof, opening at the bottom thereof and formed with at least one axial slot in a side wall thereof, a second cylinder reciprocatable and rotatable within said first cylinder and spring-urged axially inwardly of said first cylinder;
- said second cylinder having at leat one axial groove in an outer wall thereof, said groove opening at one end thereof, the open end having one edge of a substantially right angle and the outer edge contoured off;
- and a slidable roller normally engaging both said slot and groove and spring urged axially outwardly of said first cylinder
- characterized by a sleeve reciprocatable around said first cylinder and having a radial pin fixed thereto and projecting radially inward to reciprocatably engage said slot;
- said pin stopping said roller from moving axially inwardly of said groove;
- and means for selectively holding said sleeve at predetermined axially various positions relative to said first cylinder.
Dependencies are inferred from the claim text.