Title:
SELF-LOCKING SCREW
Document Type and Number:
WIPO Patent Application WO/1979/000280
Kind Code:
A1
Abstract:
A self-locking screw is provided with a slit (4) radially cut along the top portion of the screw thread (2). The flank angle (3) of the screw thread (2) is less than the flank angle (8) of the screw thread (7) of a cooperating screw (6), so that the screw thread (2) is elastically deformed by engagement with the screw thread (7) along a direction making the slit (4) narrower. As a result, the side surfaces (2a) of the screw thread (2) are coherently pressed onto the side surfaces of the screw thread (7), causing a strong friction between them and providing for good anti-loosening ability.
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Inventors:
TOMOYASU Y (JP)
Application Number:
PCT/JP1978/000017
Publication Date:
May 31, 1979
Filing Date:
November 01, 1978
Export Citation:
Assignee:
TOMOYASU Y (JP)
International Classes:
F16B39/30; (IPC1-7): F16B39/30
Foreign References:
| JPS3613154B1 | ||||
| JPS4739387B1 | ||||
| JPS484140B1 | ||||
| JPS4827343B1 | 1973-08-21 | |||
| JPS4944813B2 | 1974-11-30 | |||
| JPS464412A | ||||
| US3069961A | 1962-12-25 | |||
| GB1312189A | 1973-04-04 | |||
| US3882917A | 1975-05-13 |
Other References:
Kikaisekkei, Vol. 16, NO 1 (1972-1), photograph 8, page 100
Kikaisekkei, Vol. 17, NO. 6 (1973-6), "Nejiyama no Katachi ni Henka o Ataeta Jibakuneji" page 5
Kikaisekkei, Vol. 17, NO. 6 (1973-6), "Nejiyama no Katachi ni Henka o Ataeta Jibakuneji" page 5
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