Double effect hydraulic shock absorber

Details Double effect hydraulic shock absorber Double effect hydraulic shock absorber

1976-02-03

1977-06-28

Blix, Trygve M.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

188315, 188322, F16F 946

Patent

active

040319890

ABSTRACT:
A double effect hydraulic shock absorber includes a system for varying the resistance of the compression cycle of the shock absorber. Two different compression loads are obtained by joining the inner chamber of the shock absorber to the outer annular chamber through two groups of exhaust ducts, each of the groups of exhaust ducts being controlled by unidirectional valves set at different pressures or strengths. The ducts set at a lesser pressure are provided with a blocking device capable of closing such ducts, thus leaving as the only outlet for the expelled oil the ducts set at a higher pressure. The blocking device includes an electromagnet which axially activates the blocking element, thus closing or leaving free the inlet of the weak exhaust ducts.

REFERENCES:
patent: 725456 (1903-04-01), Lemp
patent: 2504435 (1950-04-01), Matteson
patent: 2948357 (1960-08-01), Cookson
patent: 3040841 (1962-06-01), Schultze
patent: 3532194 (1970-10-01), Jackson
patent: 3874487 (1975-04-01), Keijzer et al.

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