# US 10,442,061 B2 · Rotatable fastening device and application method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,442,061 B2 - Document ID: US10442061B2 - Status: Granted - Kind: B2 - Application number: 15/227,978 - Filed: 2016-08-04 - Published: 2017-10-19 - Granted: 2019-10-15 - Earliest claimed: 2016-04-13 - Assignees: Kabo Tool Company - Applicants: Kabo Tool Company - Inventors: Chih-Ching Hsieh - Web page: https://patentgrep.com/patent/US10442061B2 ## CPC - B25B 21/02: with means for imparting impact to screwdriver blade or nut socket - B25B 13/06: of socket type - B25B 23/1475: {for impact wrenches or screwdrivers} - B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING ## Abstract A rotatable fastening device disclosed in the present disclosure includes a rotating seat and an impact element. The impact element is one-way pivoted at the rotating seat. The rotating seat is rotated along a rotation axis and detachably connected between a driving tool and an element to be rotated. The weight and kinetic energy of the impact element will provide a one-way tangential impact force around the rotation axis with of rotation. ## Claims ### Claim 1 A rotatable fastening device, connected between a driving tool and an element to be rotated, comprising: a rotating seat rotated along a rotation axis and comprising: a driving end detachably connected with the driving tool; and a fastening end detachably connected with the element to be rotated for driving the element to rotate; an impact element pivotally configured at an outside of the rotating seat, wherein the impact element is driven by the rotating seat to surround the rotation axis for producing a one-way tangential impact force; and a one-way position-limiting assembly disposed on the rotating seat and selectively engaged with the impact element; wherein when the rotating seat rotates toward a first rotation direction, the one-way position-limiting assembly provides an elastic restoring force to rotate the impact element so as to allow the rotating seat to receive the one-way tangential impact force of the impact element surrounding the rotation axis; wherein when the rotating seat rotates toward a second rotation direction, the impact element is not driven by the one-way position-limiting assembly. ### Claim 2 (depends on 1) The rotatable fastening device of claim 1, wherein the one-way position-limiting assembly is a one-way bearing. ### Claim 3 (depends on 1) The rotatable fastening device of claim 1, wherein the impact element is an annular-like element, a triangular-like element, a radial-like element, a rod-like element or a block-like element. ### Claim 4 (depends on 1) The rotatable fastening device of claim 1, wherein the rotatable fastening device is a sleeve. ### Claim 5 A rotatable fastening device, comprising: a rotating seat rotated along a rotation axis, wherein the rotating seat comprises: a fastening end detachably connected with the element to be rotated for driving the element to rotate; and at least one position-limiting groove disposed at an outside of the rotating seat; a one-way position-limiting assembly comprising: at least one pivotal tooth pivotally disposed in the position-limiting groove; and an elastic restoring element disposed in the position-limiting groove for pushing the pivotal tooth outwards; and an impact element having a pivoting hole, wherein the pivoting hole is pivoted at the outside of the rotating seat corresponding to the pivotal tooth and has a plurality of one-way position-limiting teeth formed therein; wherein the one-way position-limiting teeth cooperates with the pivotal tooth to allow the impact element to be driven through a stored force of the elastic restoring element when the rotating seat rotates toward a first rotation direction and to be limited when the rotating seat is stopped for receiving a one-way tangential impact force of the impact element surrounding the rotation axis; wherein the impact element is not driven by the rotating seat when the impact element inertially rotates toward a second rotation direction. ### Claim 6 (depends on 5) The rotatable fastening device of claim 5, wherein the impact element is an annular-like element, a triangular-like element, a radial-like element, a rod-like element or a block-like element. ### Claim 7 (depends on 5) The rotatable fastening device of claim 5, wherein the elastic restoring element is a spring, an elastically adhesive lump or a combination of a spring and a ball. ### Claim 8 (depends on 5) The rotatable fastening device of claim 5, wherein, a quantity of the position-limiting groove is four, which are equally surrounded at the outside of the rotating seat; a quantity of the one-way position-limiting assembly is four, and the four one-way position-limiting assemblies are correspondingly disposed in the four position-limiting grooves; and the plurality of one-way position-limiting teeth are entirely and surroundingly disposed in the pivoting hole of the impact element. ### Claim 9 (depends on 5) The rotatable fastening device of claim 5, wherein the pivotal tooth is cooperated with the one-way position-limiting teeth to rotate along a single direction when the elastic restoring element pushes the pivotal tooth outwards to have an angle of 90 degrees with each other. ### Claim 10 (depends on 9) The rotatable fastening device of claim 9, wherein the position-limiting groove has an arc-concave portion and the pivotal tooth has an arc end portion for slidably pivoting in the arc-concave portion. ### Claim 11 (depends on 5) The rotatable fastening device of claim 5, wherein the rotatable fastening device is a sleeve. ### Claim 12 (depends on 5) The rotatable fastening device of claim 5, wherein the one-way position-limiting assembly comprises a locking device for keeping the pivotal tooth at an open position and a close position. ### Claim 13 (depends on 5) An application method for the rotatable fastening device of claim 5, comprising: performing a one-way driving step, wherein the impact element is driven when the rotating seat rotates toward a first direction and is not driven when the rotating seat rotates toward a second direction; and performing a one-way impacted step, wherein when the rotating seat rotates toward the first rotation direction, the elastic restoring element is compressed and then the elastic restoring element releases an elastic restoring force to push the pivotal tooth to rotate the impact element for providing a one-way tangential impact force to the rotating seat by the impact element surrounding the rotation axis; wherein when the rotating seat rotates toward the second rotation direction, the impact element is not driven by the rotating seat. ### Claim 14 (depends on 13) The application method for the rotatable fastening device of claim 13, wherein, the rotating seat allows the impact element to further rotate for a distance and to be limited in the one-way impacted step. ### Claim 15 (depends on 1) An application method for the rotatable fastening device of claim 1, comprising: performing a one-way driving step, wherein the impact element is driven when the rotating seat rotates toward a first direction and is not driven when the rotating seat rotates toward a second direction; and performing a one-way impacted step, wherein the one-way position-limiting assembly provides an elastic restoring force to rotate the impact element so as to allow the rotating seat to receive the one-way tangential impact force of the impact element surrounding the rotation axis; wherein when the rotating seat rotates toward the second rotation direction, the impact element is not driven by the rotating seat. ### Claim 16 (depends on 15) The application method for the rotatable fastening device of claim 15, wherein, the rotating seat allows the impact element to further rotate for a distance and to be limited in the one-way impacted step.