Back to results
US 11,953,046 B2Granted
Nut
AssigneeIwata Bolt Kabushiki Kaisha
InventorsTetsuo Shibusawa, Kenta Tasaka
Life of this patent
Estimating the term…
Abstract
There is provided a nut in which occurrence of galling is prevented. The nut in which a depth t of a counterbore hole is set to be greater than (D−d×cos θ)/tan θ, when a nominal diameter is D, an average value of a maximum outer diameter and a minimum outer diameter taking into account a tolerance of a bolt to be fitted is d [mm], an inner diameter of the counterbore hole provided on an insertion side of a screw hole is D+0.2 [mm], a pitch of a screw thread is P [mm], and θ satisfies θ=arc tan(P/d).
Claims3
A nut comprising:
- a counterbore hole;
- and
- a screw hole having a screw thread,
- wherein a depth t of the counterbore hole is set to be greater than a value calculated by Equation (1),
- wherein a nominal diameter of the screw hole is D,
- wherein an average value of a maximum outer diameter of a bolt configured to be fitted into the nut and a minimum outer diameter of the bolt, determined according to a tolerance of the bolt, is d [mm],
- wherein an inner diameter of the counterbore hole provided on an insertion side of the screw hole is D+0.2 [mm],
- wherein a pitch of the screw thread is P [mm],
- wherein θ satisfies θ=arctan(P/d), and
- wherein Equation 1=(D−d×cos θ)/tan θ.
7 more elements
Dependencies are inferred from the claim text.