BACKGROUND OF THE INVENTION
The invention relates to an elastomeric shock absorber.
The hitherto known shock absorber disclosed in the Polish patent description No. 122000 comprises a casing filled with compressible elastomer and a piston rod immersed therein. The head of the piston rod is provided with connecting ports communicating with front and back chambers of the head, and is equipped with a ring or light stop block mounted on the head's section facing the chamber, the chamber being filled with elastomer. A mobile member is located between the stop block or ring and the surface of piston head from which the ports emerge. The aforementioned mobile member closes the ports with delay while the piston rod is immersing into the chamber with elastomer and opens them during the backward movement of the piston rod.
Other known devices meant to absorb shocks, provided with a cylinder and a piston are shown in U.S. Pat. Nos. 3,819,060, 3,971,551, 3,876,044 and 3,711,080. However, a disadvantage of these shock absorbers which are provided with pistons is that it is necessary to insure the proper cooperation of the peripheral sealing of the piston with the cylindrical surface of the casing.
It is one important object of the present invention to provide means to expand the possibilities of manipulating the shock absorber performance characteristic and more specifically to obtain increased range of shock energy absorption coefficient while preserving high durability of the assembly.