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
F16J13/18—Pivoted closures pivoted directly on the frame
Bracelet fastener with folding parts locked to support - has two pushbuttons sliding in support with ends projecting and engaging in slots in folding parts