| 摘要 |
1497504 Hook COLUMBUS McKINNON CORP 20 Jan 1976 [10 Feb 1975] 02109/76 Heading E2A A safety hook comprises a hook 12 to which is pivoted a moving piece 14 and which has a latch 18 to hold the mousing piece 14 in the "hook-closed" position. The latch 18 comprises a dumb-bell shaped member 50 received in a bore 30 in the body of the hook 12. Member 50 is biased by spring 52 towards the latching position in which it is retained by lug 32 and in which the enlarged end 50b engages a notch 46a formed in rib 44 on the back of the mousing piece 14. The latch is released by pushing end 50a against the bias of spring 52 so that end 50b no longer engages notch 46a. The hook may then be opened manually. The mousing piece is frictionally maintained in the open position by engagement of the face 44a of rib 44 with the inside face 50b' of the end 50b. The hook is generally I-shaped in cross section; this, together with the lug 32 forms a convenient hand-grip for the operator. |
