	US 12,467,497 B2
	Spring head screw assembly
Ralph Joerg Hellmig, Bad Laasphe (DE); and David Korn, Bad Laasphe (DE)
Assigned to EJOT SE & CO. KG, Bad Berleburg (DE)
Appl. No. 18/280,191
Filed by EJOT SE & Co. KG, Bad Berleburg (DE)
PCT Filed Mar. 9, 2022, PCT No. PCT/EP2022/056073 § 371(c)(1), (2) Date Sep. 1, 2023, PCT Pub. No. WO2022/189526, PCT Pub. Date Sep. 15, 2022.
Claims priority of application No. 10 2021 105 698.5 (DE), filed on Mar. 9, 2021.
Prior Publication US 2024/0141949 A1, May 2, 2024
Int. Cl. F16B 39/282 (2006.01)

CPC F16B 39/282 (2013.01)

15 Claims

1. A spring head screw assembly comprising a spring head screw having a head with a conical skirt that widens towards a free end of a threaded shank which adjoins the head, wherein the spring head screw assembly has a washer which is located between the skirt and a threaded part of the shank in an unthreaded part of the shank that has a bolt diameter (_d0), with an inner surface of the skirt transitioning into the shank at a radius (_RU), which inner surface forms a contact angle (α) with a support plane (_EA), which support plane (_EA) is defined by the end of the skirt facing a free end of the screw and is orthogonal to a screw axis, wherein the shank has, between the support plane (_EA) and the radius (_RU) in the transition to the skirt, a cylindrical region having the bolt diameter (_d0).