PISTON Russian patent published in 1994 - IPC

FIELD: engine engineering. SUBSTANCE: bellows is provided with a boss made on its face and tightly received in a hole of a bottom of the piston. A valve and an inlet adapter are received in a cylindric hollow which faces outward. Passages are made in the adapter body for communication of the valve with the adapter and coupling them with a space of the bellows. The hollow is provided with a threaded cover which presses a head of the valve and is fixed against unscrewing with a flexible rod. The rod is screwed in the cover up to abutting against conical wall of a hollow in the middle part of the hollow provided with ribs. EFFECT: enhanced safety of assembling and disassembling of the piston. 3 cl, 1 dwg