FR2732662A1 - Handlebar for reducing ground jolts and vibrations caused e.g. due to ground unevenness - Google Patents

Abstract

The handlebars comprise five elements, a central grooved tube (1), two identical systems (2) and two ferrules (3). The two identical systems, which are screwed onto each end of the central tube, are formed from three elements having a central flexible part (4) compressed by two side metal parts. Bending of each ferrule is caused by the compression of a rubber cylinder (5) maintained in position by a stop (5) and in inclination by a cable (6). The first element of the identical systems comprises a threaded rod connected to a head which has three projections concentric with a second threaded rod. The head is pulled at its end by a cable in the element. A curved stop (6) is formed on 38% of the head surface. The second element comprises a smooth surfaced rod having three small projections concentric with a second threaded rod. The third element comprises a rubber washer with a threaded collar and ring..

Description

DESCRIPTEON
The present invention relates to a handlebar for re @ uire tremors and vibrations occasiontlées uneven ground, thereby reducing fatigue.

The current state of the art allows me to identify two types of handlebars using the principle of flexion, one by its constitution, the second by the presence of parts of lesser thickness.

The handlebars according to the invention, by its design uri similar result but eti having the possi @ llité to limit bending in space and tilt.

This will ensure better use of the handlebars.

In fact too large flexions can cause an imbalance while uncontrolled flexions can have drawbacks.

Ex: During strong ascensiosls which requires cycl @ ste uti increased alternating pull of the guide towards you in order to increase the thrust on the pedals.

The handlebars according to the invention overcomes these drawbacks.

According to a first characteristic, it comprises five assembled elements.

The central tube, two devices and two end caps.

The devices themselves formed from three assembled elements have a flexible central part which is compressed by the two lateral metal elements.

This compression maintained by means of an inner cable allows the mechanical properties of the flexible element to be preserved while increasing its resistance to deformation.

A longitudinal stop co @ stitué on one of the metal element of the device and presented attached to itself end a small independent cable to the device, allows to limit bending in space and tilt.

The accompanying drawings illustrate the invention.

Figures 1-2-3-4 show the elements that make up the device.

Figures 5 and 6 show the elements that make up the hanger.

Figure 7 shows in section, the device followed t 1 the invention.

With reference to figures 1-2-3-4
Element 1 comprises a threaded rod (1) connected to a head (2) whose face opposite to the rod (1) has three protruding ptites (3) concentric with a second threaded rod (4) from which it stretches from its end a cable (5) formed in the element.

Form on 38% of the surface the tette (2), a stop (6) in an arc extends in space in parallel with the rod (4) and has on its internal face a small incurvatiorl (7).

The stop (6) has on each angular end an opening (d) perpendicular to an orifice (9).

The element 2 comprises a rod (1) with a smooth surface, connected to a head (2) whose face opposite the rod (l) has three small projections (3) concentric with a second threaded rod (4).

The rod (i) divided in two by a groove (5), conlporte on the two large diameters, two threads (6) which lead to a conduit (7) having at one of its ends a frustoconical shape.

Element 3 comprises a rubber washer (1), the faces of which have a threaded ring (2! Provided with a ring (3).

The ring pierced with four holes (4) forms with the Wave (2) only one piece.

The element 4 independent of the device consists of a cable (1) which comprises at each end a small metal cylinder (2) having a groove (3).

The element 5 comprises a tube (1) threaded on the internal wall and the surface of which has grooves (2).

Element 6 comprises a tube (1), the end of which is coated with a sheath (2) and has a thread (3).

Referring to figure 7
Elements 1 and 2 provided with the same threaded rod (1) and (2) are screwed. the rubber washer 3, the faces of which have a threaded ring (3).

The assembly by screwing of these three elements constitutes security in case the cable (4) breaks.

This cable (4) after compression of the assembly is locked in element 2 by two grub screws with hexagon socket.

The projections present on each element 1 and 2 have the role of containing the rubber washer, which after compression could overflow.

After the various elements have been assembled, the cylinders (5) of element 4 are introduced into the orifices (6) and fixed by two pins (7) in the shape of a U.

The devices thus assembled are screwed to the element 5 and the end pieces 6, fitted at the remaining free ends.

The rubber shape, may be more or less hard, depending on the weight of the cyclist.

When the user exerts a vertical push on the end pieces 6, these connected to the fiéch @ ssent devices by deformation of the rubber washer.

The flexions then went out limited to 5 @ ax @ mun. relative to the axis of the handlebar, by the cables (Y) element 4 and in space by the stop (9).

The different metallic elements that make up the handlebars are made of "duralumin" aluminum in an injection molding operation, while the element 3 of "polyurethane" rubber is compression molded.

The handlebar according to the invention is particularly intended for bikes on all terrains.

Claims (12)

DREAM @ DICATIONS 1) Handlebars to reduce bumps and vibrations characterized in that it comprises five elements, including two devices themselves made up of three elements which have a flexible central part, kept compressed by an inner cable (4) and permitting the ends 6 flexions, limited in space by a stop (9) and in inclination by a cable (8). 2) Device according to claim 1 characterized in that element 1 comprises a threaded rod (1), connected to a head (2), the face opposite to the rod (1) has three small projections (3), concentric with a second threaded rod (4). 3) Device according to claim 1 or 2 characterized in that the stop (6) formed on 38 * of the head (2) constitutes a part of the element. 4) stop according to claim 3 characterized in that it comprises at each angular end an opening (8) perpendicular to an orifice (9). 5) Stopper according to claim 3 or 4 characterized in that it comprises on its internal face a small? bending. 6) Device according to claim 1 characterized in that the cable (5) constitutes a part of the element. 7) Device according to claim 1 characterized in that the element 2 comprises a rod (1) of smooth surface, connected to a head (2), the face opposite to the rod (1), has three small concentric projections a a second threaded rod (4). 8) Device according to the revertdicatîott 7 characterized in that the rod (l) of the element 2, shared ert two by a groove (5), comprises on the two large diameters, two threads (6), which lead to a conduit (7) and which has at one end a sectional shape. 9) Device according to claim 1 ion, characterized in that the rubber washer 3 comprises on each face a threaded ring (2), provided with an atineau (3), perforated with four orifices. 10) Device according to claim l, characterized in that the element 4 consists of a cable (1) which comprises a small metal cylinder (2) having a groove (3), at each end.  11) Device according to claim 1 characterized in that the tube 5, has on the inner wall a thread and grooves (2) on the outer wall. 12) Device according to claim 1 characterized in that the end pieces 6 coated with a sheath (2), include a thread (3).