The invention relates to a self-locking nut (1) having an upper threaded collar (3) provided with longitudinal slots (7), being V or U shaped, also with sharp edge, defining in the collar a plurality of circular arc segments (9) compressed by an external helical spring (5), and in which the collar slots have such a width as not to allow the mutual contact of the circular arc segments (9) compressed by the spring. The spring of the self-locking nut is made of precipitation hardening stainless steel whereby it shows high constancy of braking torque features even for repeated screwing/unscrewing cycles. The invention also relates to a method for manufacturing the nut.
F16B 39/28 - Locking of screws, bolts, or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
The present invention concerns self-locking nuts (1) comprising an upper threaded collar (3) provided with longitudinal slots (7), being V or U shaped, also with sharp edge, defining in the collar itself a plurality of circular arc segments (9) compressed by one or more turns of an external helical spring (5) made of a metal wire (5a), wherein the collar slots (7) have such a width as not to allow the mutual contact of the circular arc segments (9) compressed by the spring (5). The wire (5a) of the spring (5) is made of precipitation hardening stainless steel, and the nuts have values of unscrewing braking torque that differ from one another and are obtained, for nuts (1) having the same diameter, by modifying at least one dimensional parameter (Φd, Φj, 6) of the spring. The invention also concerns a method of manufacturing nuts according to the invention.
F16B 39/22 - Locking of screws, bolts, or nuts in which the locking takes place during screwing down or tightening
F16B 39/284 - Locking by means of elastic deformation
F16B 39/36 - Locking of screws, bolts, or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt with conical locking parts, which may be split, including use of separate rings co-operating therewith
The present invention refers to a sell=locking nut (1) comprising an upper threaded collar (3) provided with longitudinal slots (7), being V or U shaped, also with sharp edge, defining in the collar a plurality of circular arc segments (9) compressed by an external helical spring (5), and in which the collar slots have such a width as not to allow the mutual contact of the circular arc segments (9) compressed by the spring. The spring of the self-locking nut is made of precipitation hardening stainless steel whereby it shows high constancy of braking torque features even for repeated screwing/unscrewing cycles. The invention refers also to a method for manufacturing the nut.
F16B 39/36 - Locking of screws, bolts, or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt with conical locking parts, which may be split, including use of separate rings co-operating therewith
The present invention refers to a self-locking nut (1) comprising an upper threaded collar (3) provided with longitudinal slots (7), being V or U shaped, also with sharp edge, defining in the collar a plurality of circular arc segments (9) compressed by an external helical spring (5), and in which the collar slots have such a width as not to allow the mutual contact of the circular arc segments (9) compressed by the spring. The spring of the self-locking nut is made of precipitation hardening stainless steel whereby it shows high constancy of braking torque features even for repeated screwing/unscrewing cycles. The invention refers also to a method for manufacturing the nut.
F16B 39/36 - Locking of screws, bolts, or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt with conical locking parts, which may be split, including use of separate rings co-operating therewith
06 - Common metals and ores; objects made of metal
Goods & Services
Écrous autobloquants; métaux communs bruts et mi-ouvrés et
leurs alliages; ancres, enclumes, cloches, matériaux à bâtir
laminés et fondus; rails et autres matériaux métalliques
pour les voies ferrées; chaînes (à l'exception des chaînes
motrices pour véhicules); câbles et fils métalliques non
électriques; serrurerie; tuyaux métalliques; coffres-forts
et cassettes; billes d'acier; fers à cheval; clous et vis;
autres produits en métal (non précieux) non compris dans
d'autres classes; minerais.
06 - Common metals and ores; objects made of metal
Goods & Services
Self-locking nuts; common metals, unwrought or semi-wrought,
and their alloys; anchors, anvils, bells, rolled and cast
construction materials; metallic rails and other metallic
materials for railway tracks; chains (except for driving
chains for vehicles); non-electrical metal cables and wires;
locksmithing; pipes of metal; safes and strongboxes; steel
balls; horseshoes; nails and screws; other (non precious)
metal products not included in other classes; ores.
06 - Common metals and ores; objects made of metal
Goods & Services
Métaux communs, bruts et mi-ouvrés et leurs alliages;
ancres, enclumes, cloches, matériaux à bâtir laminés et
fondus, rails et autres matériaux métalliques pour les voies
ferrées; chaînes (à l'exception des chaînes motrices pour
véhicules); câbles et fils métalliques non électriques;
serrurerie; tuyaux métalliques; coffres-forts et cassettes;
billes d'acier; fers à cheval; clous et vis; autres produits
en métal (non précieux) non compris dans d'autres classes,
minerais.
