ON-BOARD FUELLING UNIT COVER

摘要

FIELD: manufacture of aircraft; fuel filling equipment. SUBSTANCE: cover of on-board pressure fuelling unit has cover 1 proper with bearing flange 2 provided with sealing device 3 and hold-down 5 fitted coaxially relative to it. Hold-down 5 is telescopically mounted on outer cylindrical surface of cover 1 where second sealing device 4 is fitted in circular bore. Cover 1 and hold- down 5 are mutually loaded with spring 7 located between them; holes 8 are provided in end wall of cover 1 which are brought in communication with space between cover 1 and hold-down 5, forming relief chamber 9. EFFECT: enhanced reliability due to limiting maximum force of pressing the cover and excluding break of hold-down. 2 cl, 2 dwg