| 摘要 |
FIELD: mechanical engineering; drop sided, timber loading and building manipulator and other machines. SUBSTANCE: safety shutoff device has housing 1 in bores of which plungers 2 and 3 of check and safety valves 4 and 5 are installed. Inlet and outlet holes 12 and 13 communicate with spaces 6,7,8,9 of valves 4 and 5 through channels 10 and 11. Pusher has control space 6. Safety valve bore is made stepped with groove forming additional space 21 to control plunger 3 of valve 5. EFFECT: improved safety. |
