Screw tap
OwnerKlaus-Peter Völkelinventor
Life of this patent
Estimating the term…
Abstract
A screw tap includes a shaft having at least one cutting portion and a drive portion. The drive portion is of a cross-section complimentary to tools adapted to act upon the drive portion. The shaft is provided with a recess extending axially thereof and adapted to receive drive device having a cross-section corresponding to the cross-section of the recess.
Claims20
A screw tap (1) comprising a shaft (100), having at least one cutting portion (2) and a polygonal drive portion (3), the drive portion (3) having a contour whose cross section is complementary to fittable tools provided to act on the drive portion (3) for purposes of torque transmission, wherein a supplementary drive option for manually applying a torque which must be supplied to said screw tap in order to produce the cutting force comprises a recess (5) of non-circular cross section is introduced into the front end (4) of said shaft (100), and extends with a negative cross section (6) in an axial direction and is provided to receive a manually drivable positive-locking drive having a positive cross section corresponding to said recess (5).
Dependencies are inferred from the claim text.