Bicycle handlebar stem with adjustable inclination

A bicycle stem with adjustable inclination, comprising:

• a stem body, one extremity of which includes means of attaching a handlebar, and opposite extremity including two parallel arms capable of being connected to a fork pivot tube by an articulation;
• clamping means associated with the articulation and capable of immobilizing the stem in a position corresponding to a chosen angle of inclination;
• a pair of flat surfaced frustoconical bodies forming the clamping means and being connected to internal faces of the corresponding extremities of the arms, the flat surfaced frustoconical bodies constituting part of the articulation by being received in flat surfaced housings of complementary shape formed to one side and the other of the articulation;
• connecting means connecting the flat surfaced frustoconical bodies so as to make possible to move the flat surfaced frustoconical bodies in the respective housing of the articulation, and to loosen by moving them further apart one from the other in order to perform a continuous adjustment of the inclination of the handlebar, wherein a cone angle of the flat surfaced frustoconical bodies possesses a value of less than 15° to obtain pinching of the flat surfaced frustoconical bodies inside the housings of complementary shape,
• wherein a means of expulsion of the flat surfaced frustoconical bodies is provided between them, the means of expulsion being capable of releasing the flat surfaced frustoconical bodies from their respective housing,
• wherein the stem body is formed by two parallel arms, and in that each flat surfaced frustoconical body of the pair of flat surfaced frustoconical bodies is integral with a respective arm,
• wherein the connecting means include a double-threaded screw cooperating with a central threaded hole on the internal face of the opposite flat surfaced frustoconical bodies.

A bicycle stem with adjustable inclination, comprising:

• a stem body, one extremity of which includes means of attaching a handlebar, and opposite extremity including two parallel arms capable of being connected to a fork pivot tube by an articulation;
• clamping means associated with the articulation and capable of immobilizing the stem in a position corresponding to a chosen angle of inclination;
• a pair of flat surfaced frustoconical bodies forming the clamping means and being connected to internal faces of the corresponding extremities of the arms, the flat surfaced frustoconical bodies constituting part of the articulation by being received in flat surfaced housings of complementary shape formed to one side and the other of the articulation;
• connecting means connecting the flat surfaced frustoconical bodies so as to make possible to move the flat surfaced frustoconical bodies in the respective housing of the articulation, and to loosen by moving them further apart one from the other in order to perform a continuous adjustment of the inclination of the handlebar, wherein a cone angle of the flat surfaced frustoconical bodies possesses a value of less than 15° to obtain pinching of the flat surfaced frustoconical bodies inside the housings of complementary shape,
• wherein a means of expulsion of the flat surfaced frustoconical bodies is provided between them, the means of expulsion being capable of releasing the flat surfaced frustoconical bodies from their respective housing,
• wherein the stem body is formed by two parallel arms, and in that each flat surfaced frustoconical body of the pair of flat surfaced frustoconical bodies is integral with a respective arm,
• wherein the connecting means include a double-threaded screw cooperating with a central threaded hole on the internal face of the opposite flat surfaced frustoconical bodies, and
• wherein the double-threaded screw includes in a central section two spaced flanges, one of which includes on a periphery two diametrically opposed flats permitting the double-threaded screw to be introduced, by inclining it, through a central hole of a separating wall separating the housings from the flat surfaced frustoconical bodies in order to position the flanges to either side of the separating wall in such a way that an expulsion means is obtained when one or other of the flanges abuts against the separating wall.