US 12,135,054 B2
Relative rotation prevention structure for screw, relative movement prevention structure, and relative movement prevention body
Hiroshi Michiwaki, Tokyo (JP)
Assigned to NejiLaw Inc., Tokyo (JP)
Appl. No. 16/497,605
Filed by NejiLaw Inc., Tokyo (JP)
PCT Filed Mar. 20, 2018, PCT No. PCT/JP2018/010925
§ 371(c)(1), (2) Date Jan. 29, 2021,
PCT Pub. No. WO2018/180737, PCT Pub. Date Oct. 4, 2018.
Claims priority of application No. 2017-060816 (JP), filed on Mar. 27, 2017; application No. 2017-100636 (JP), filed on May 22, 2017; and application No. 2017-131553 (JP), filed on Jul. 4, 2017.
Prior Publication US 2021/0140465 A1, May 13, 2021
Int. Cl. F16B 39/04 (2006.01); F16B 39/12 (2006.01)
CPC F16B 39/12 (2013.01) 14 Claims
OG exemplary drawing
 
1. A relative-rotation prevention structure for preventing relative-rotation of a screw having a threaded portion with respect to a counterpart member, the structure comprising:
a counterpart-side displacement section formed in advance in the counterpart member and defined in an axial direction or a radial direction, the counterpart-side displacement section comprising one or more strip-shaped radial protrusions extending helically at an angle relative to the axial direction; and
a screw-side deformation-capable section formed on the screw, wherein the screw-side deformation-capable section is configured to press the counterpart-side displacement section through a fastening force and thus is configured to be deformed by the one or more strip-shaped radial protrusions in both the axial direction and the radial direction, thereby to produce a screw-side displacement section defined in the axial or the radial direction.