Improvements in or relating to means for preventing escape of pressure fluid from a pressure fluid container through an aperture therein formed by or for a tool or test piece

摘要

570,479. Gas-producers. NORTHERN ALUMINIUM, CO., Ltd., and PRESTON, J. Dec. 23, 1943, No. 21545. [Classes 51. (i) and 51 (ii)] [Also in Group XXVI] A bearing member 1 for a tool or test-piece is angularly adjustable in a base member 3 on a pressure container, e.g. a gas producer, and has an annular recess 5 to which fluid is supplied under pressure greater than the -internal pressure of the container to maintain a seal about the tool 2.