Patent No. EP4051912 (titled "Bolt With An Adjustable Clamping Region") was filed by Bernd Siegmund on Nov 2, 2019. The application was issued on Dec 17, 2025.
A bolt (1) for clamping abutting parts (19, 20) with openings (21, 22) comprises a bolt-like part (2) insertable into said openings. A threaded sleeve (5), projecting radially beyond the bolt-like part, is longitudinally adjustable and fixable via an internal thread (6) engaging an external thread (7) on the bolt-like part's outer side. At the end opposite the sleeve, at least one clamping element (4) is positioned inside the bolt-like part, movable beyond its outer circumference through at least one opening (9) via an actuator (11). The bolt-like part includes components without external threads extending at least partially into each abutting part. The threaded sleeve (5) features a projection (23) with an outer circumference matching the bolt-like part, insertable into one opening.

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