Improvements in or relating to safety trapdoors particularly for use in internal combustion engine crank casings

摘要

422,127. Crank casings. HANSEN, P., 3, Svejgaardsvej, Copenhagen. July 5, 1933, No. 19039. [Class 7 (ii)] A trapdoor for crank casings consists of a cover 1 maintained in the closed position by its weight, and a spring 11 around the hinge pin 12. A spring-pressed pin 7 catches behind the projection 8, but gives before excessive pressure in the casing. Packing 4 is placed between the door and its seating.