PNEUMATIC SPRING Russian patent published in 2014 - IPC F16F9/02 F16F9/512 F16F9/36 

FIELD: machine building.

SUBSTANCE: invention relates to machine building. A pneumatic spring includes container (1), installed in it stock (4) with piston (6) and sealing element (5) of the stock. The piston creates in the container the above piston (8) and under piston (9) cavities. The piston has a set of circular grooves on side surface. In some grooves the O-rings are installed, in other grooves - piston hydraulic seal. The piston has first groove (7) and additional ring groove (21). Each groove has: fluid chamber (13, 24), resilient cylindrical sleeve (10, 22), bushing (11, 25), and valve (19, 30) to charge the fluid chamber. Each fluid chamber is connected with channels (14, 27) with ring groove (15, 28) with piston hydraulic seal. Each bushing locks the elastic cylindrical sleeve in the groove and has set of through holes (12, 26) on the side surface. The through channel (20) connects the above piston and under piston cavities of the pneumatic spring.

EFFECT: decreasing of the probability of breakdown under impact loads.

1 dwg