Invention Grant
- Patent Title: Screw and method of its manufacture
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Application No.: US15119997Application Date: 2015-03-16
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Publication No.: US10580593B2Publication Date: 2020-03-03
- Inventor: Mariusz Skóra , Boguslaw Buszta , Dariusz Kluz
- Applicant: GAWEŁ ZAKŁAD PRODUKCJI ŚRUB S.A.
- Applicant Address: PL Strazow
- Assignee: GAWEL ZAKLAD PRODUKCJI SRUB S.A
- Current Assignee: GAWEL ZAKLAD PRODUKCJI SRUB S.A
- Current Assignee Address: PL Strazow
- Agency: Ziegler IP Law Group, LLC
- Priority: PL407642 20140324
- International Application: PCT/PL2015/050005 WO 20150316
- International Announcement: WO2015/147667 WO 20151001
- Main IPC: F16B35/00
- IPC: F16B35/00 ; H01H1/025 ; H01H11/04 ; B23G9/00 ; H01H1/021

Abstract:
A screw includes a barrel-shaped central pin is surrounded by a cylindrical bore having a conical bottom The cylindrical insert is seated in the cylindrical bore. The top surface of the central pin is lowered below the top surface of the head. The walls of the pin (4) are convex towards the insert. Manufacturing the screw includes producing the threaded part with the head with the cylindrical recess with the cone-shaped bottom. The cylindrical insert terminates at one end with a bevel with an inclination angle of α=10-30°. The insert is introduced into the cylindrical recess. The upper part of the insert protruding from head of the screw is pre-shaped. The pin is upset using an appropriate tool and simultaneously the top surface of the pin is lowered below the top surface of the head.
Public/Granted literature
- US20170062145A1 SCREW AND METHOD OF ITS MANUFACTURE Public/Granted day:2017-03-02
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