VEHICLE PNEUMOHYDRAULIC SPRING Russian patent published in 1996 - IPC

FIELD: transport; heavy dump truck springs. SUBSTANCE: made in head of piston 4 is through central hole 12 accommodating rod 11 of device through which above-piston space 10 communicates with counterpressure chamber 7 in position of designed equality of pressures in thse spaces. made on outer surface of rod 11 in its middle portion is groove 11 with faces 18 and 19 to place above-piston space 10 and counterpressure chamber 7 in communication. Spring has seal 13 for rod 11 installed in through central hole 12 of piston two tubes 15 and 16 installed coaxially with rod 11 in above-piston space 10 and in counterpressure chamber 7. Adjacent ends of tubes 15 and 16 are hermetically sealed in through central hole 12 of piston, and free ends are located on liquid and gas seoaration borders when groove 17 in rod 11 is positioned opposite to seal 13. Device has also liquid baffles 20 and 21 installed in above-piston space 10 and in counterpressure chamber 7 in zone of free ends of tubes 15 and 16. EFFECT: enhanced reliability of operation. 1 dwg