F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16J—PISTONS; CYLINDERS; SEALINGS
F16J13/00—Covers or similar closure members for pressure vessels in general
F16J13/16—Pivoted closures
F16J13/20—Pivoted closures mounted by mobile fastening on swinging arms
Arrangement de ressorts a gaz comme dispositif d'equilibrage de poids et de retenue pour des pieces pouvant essentiellement pivoter autour d'un axe horizontal