MARTINAZZO FERNANDO (IT)
| GB347067A | 1931-04-23 | |||
| GB1047783A | 1966-11-09 | |||
| GB191201534A | 1913-01-20 | |||
| US3891236A | 1975-06-24 | |||
| DE850274C | 1952-09-22 |
| 1. | MONO SHOCKABSORBER DEVICE PARTICULARLY FOR TWOWHEEL VEICHLES,char¬ acterized by the fact of consisting in at least an elastic sinking system placed between the handlebar and the forks and joined to the frame of the said veichle. |
| 2. | Device according to claim 1., characterized by the fact of including: an elastic sinking system placed in the steering base passing into the frame, or in relation to the front fork; a stem slider, on one side engaged by the said elastic sinking system on the other side joined to the fork or base; a relative means of antirotatory blockage of the stem in respect of the elastic sinking system. |
| 3. | Device according to claims 1. and 2., characterized by the fact that inside the steering base (3) of the veichle and/or a stem joined to the fork (2), a chamber is obtained which imprisons a substance or compres sable element through a joined stem to one of the two elements opposite to the previous one. |
| 4. | Device according to the previous claims, characterized by the fact that cooperative with a cylinder, in relation to the base (3), there is a stem (4) engaged on the fork (2), or viceversa, which being of an inferior diameter inserts itself partially inside the said steering base (3). |
| 5. | Device according to the previous claims, characterized by the fact that the means of antirotatory blockage of the jstem in respect of the elastic sinking syte consists in: at least one slot (5) obtained longitudinally on the fork stem (4); to a corrisponding guide obtained on the inside walls of the base (2), allowing the insertion of the said stem (4) into the shockabsorber base/cylinder (3). |
| 6. | Device according to claim 1., characterized by the fact to foresee the steering tube joined by the replacement frame of the said elastic sinking system and engaged on one side to the handlebar and on the other side to the forks, in this case the handlebar being independent¬ ly connected to the said forks of the forecarriage by some side stems sliding longitudinally through some connection plates. |
MONO SHOCK-ABSORBING DEVICE PARTICULARLY FOR TWO-WHEEL VEHICLES
TECHNICAL FIELD
The present invention has as object a mono shock-absorber particularly for two-wheel veichles.
This invention finds a particular, even thought not exclusive,applica- 5 tion in the bicycle and motorcycle components.
BACKGROUND ART
At the present technical state the above mentioned veichles are char¬ acterized by the fact that they have a handlebar that depends on the frame, and joined to the front forks which permits steering of the
10 fore-carriage. More particularly, in some cases,the handlebar,which is composed from a crossbar with an orthoganal extension from the base, hinges to the steering-tube obtained directly on the frame to be later connected inferiorly to the said fork, in other cases it eji gages itself directly to the extremes of the forks which foresee the
15 assosciation of the connection pivot pin to the steering tube of the said frame. Some veichles can absorb shocks that come from rough and un-even ground by various shock-absorbing devices obtained always on the frame. For example, on motorcycles, the shock-absorbing devices are put in relation to the front and rear forks, giving more atten-
20 tion to the front since it is logically of more importance. On bi¬ cycles instead, it is rare to find a shock-absorbing device in relj ** _ tion to the front forks, since it is easier to find them on the rear. Furthermore, but only in some cases, for instance on the turism type,
\ * a second shock-absorbing effect is guaranteed under the seat. Most
25 of the shock-absorbing effect, particularly on the front fϋrk, is guaranteed by a double device, the so-called telescopic forks the kind by gas, oleodynamic,etc. symmetrical and independent hinged
with the -relative stems on both sides of the wheel,meanwhile superior¬ ly they allow an entire mono-block support of the steering base.Other mono shock-absorbing devices are known which replace the traditional devices, but only regarding the rear part of the veichle,acting mai ly on the oscillation of the arm that supports the wheel.Various in¬ conveniences cone from these devices, it can be cited the fact that in most cases, the roughness of the ground during the ride is tran it- ted to the handlebar. Depending on the intensity, sometimes it is directly the actual strutture of the frame on which the impact is • divided that proposes itself as an excellent means of propagation of vibrations to the handlebar being hinged on the steering tube. The consequences are absolutely negative, since it can bring to the possible cause of loss of steering control, terribile sensitivity, and substantial strain while riding. Of course, the cost must also be kept in mind since for certain kinds of shock-absorbers it is particularly high.
DISCLOSURE OF INVENTION
The object of this invention is that to obviate the above mentioned inconveniences and to propose a valid alternative to the existing devices.
These and other objects come from the present innovation according to the characteristics of the annexed claims resolving the problems exposed with a mono shock-absorbing device particularly for two- wheel veichles including: - at least an elastic sinking system being put in the base of the steering, passing into the frame or in relation of the front fork - a relative means of anti-rotatory blockage of the fork stem in respect of the steering base to which it is joined. In this way through this remarkable creative contribution,its effect provides an immediate technical progress, various advantages are ob¬ tained. First of all, an improving effect of the absorption of shocks
provoked by the rough anduneven ground,consequently an improvement of the veichle and its manoeuvrability. Secondly, it brings a substantial de¬ crease of costs since pratically the entire shock-absorbing device of the fore-carriage, which initially was of two elements, is reduced on_ ly to one.
The above mentioned advantages will appear from the following detailed description of the preferential solutions of the best modes for car¬ rying out the invention with the assistance of schematic drawings an¬ nexed, for which the details of execution must be intended as illustra- tive and not restrictive.
BRIEF DESCIPTION OF THE DRAWINGS
FIG.1 rappresents a partial prospect of a handlebar and of the relative mono shock-absorbing device with the extended stem joined to the forks. FIG. rappresents always a partial prospect of the handlebar and rela- tive mono shock-absorbing device joined to the forks, but in a compre sion fase. FIG. rappresents an explosion of the said mono shock-absorbing device.
BEST MODE FOR FOR CARRYING OUT THE INVENTION
Referring to the figures it is possibile to see that a mono telescopic shock-absorbing device for a two-wheel veichle (A) is placed between the handlebar (1) and the front fork (2). More particularly inside the steering base (3) of the veichle,there is drawn a chamber to hold, by a known technique, an element that allows the compression of the space inside it and the following re-storation (for example imprisoning in- ternally with gaskets,or teflon; gas, air, oil or simply a helical spring). Cooperative with the cylinder,in this case in relation with the base ( 3) , there is the • rela i e stem (4) engaged from one side internally to the base (3), and on the other joined to the forks (2), which being of an inferior diameter is inserted inside the said steering base (3) free to slide longitudinally. In this case the fork stem (4) with its proper slot (5) inserts itself partially
into the handlebar base (3) referring itself to the replys obtained in¬ ternally (5) and making the blockage in a rotatory verse possible.How¬ ever, the movement vertically is freed by cushions or bronze rings si¬ tuated on the steering tube (6) extracted from the frame. One of the possible variations to the above mentioned solution, foresees the in¬ version, that is, foreseeing a shock-absorbing cylinder joined to the fork, while the correspondent stem is joined to the handlebar.Of course in this case passing through the tube (6),it will preferably be the said cylinder joined to the fork that can slide free longitudinally Another variation, foresees that the steering tube becomes the mono shock-absorber being engaged on one side to the handlebar and on the other side to the forks, in this case the handlebar being inde¬ pendently joined to the said forks of the fore-carriage through some side stems that slide longitudinally * through some connecting plates.