Torque enhancing clamping nut
AssigneePower Tool Holders Incorporated
InventorDaijiro Nakamura
Life of this patent
Estimating the term…
Abstract
A tightening screw in which a rotating ring is rotatably held on a flange ring, a screw member having female threads in the same pitch as the male threads of the bolt to be fitted, with the female thread diameter formed larger than the male thread diameter, is rotably held eccentrically so that some of the female threads of the screw member may be engaged with the male threads preliminarily, and the flange is fixed at the time of tightening so that the rotating ring may revolve the screw member, and thereby the decelerated rotation created in the screw member produces a large tightening force to increase the torque.
Claims14
A torque enhancing tightening screw configured to be received on a threaded drive spindle to hold a rotary tool relative to the drive spindle, said screw comprising:
- at least a first screw member defining an inner diameter opening for receipt of said threaded drive spindle, said inner diameter opening having female threads defined therein for engagement with male threads defined on said drive spindle, said inner diameter opening having a diameter greater than the diameter of said drive spindle so as to be eccentric relative to said drive spindle;
- a rotating ring disposed about said screw member, said screw member in driving contact with said rotating ring and rotatable and revolvable within said rotating ring;
- and
- a mechanism configured for rotating said rotating ring such that rotational forces are imparted to said screw member through driving contact with said rotating ring causing said screw member to rotate about said drive spindle in an eccentric path, a portion of said female threads thereby engaging with said male threads in said eccentric path causing said screw to advance along said drive spindle.
A torque enhancing mechanism for tightening a tool to a threaded drive spindle, said mechanism comprising:
- a threaded member configured for threadedly engaging with complimenting threads on said drive spindle;
- a ring member disposed circumferentially around said threaded member and rotatable relative said threaded member;
- a rotational force imparting device in contact with said ring member for transmitting an applied rotational force to said ring member to rotate said ring member;
- and
- an eccentric transmission device configured with said ring member for transmitting rotational movement of said ring member to said threaded member at an increased torque.
Dependencies are inferred from the claim text.