Patent ID: 8572819

Claim:
An enhanced safety hook, comprising: a hook body having a front side and a rear side, wherein said hook body has a hook hole, a pin slot and a guide slot penetrating said front side and said rear side, wherein said hook hole has a hook opening provided along a first side edge of said hook body, wherein said hook body comprises a hook end formed at a top end thereof, wherein said pin slot is provided at a position below said hook opening; a latch member, wherein said latch member comprises: a main plate and two side plates defining an upside-down U-shape frame; a peripheral edge bridged between said two side plates in such a manner that a top end of said latch member constructs a mouth for receiving said hook end; a guide arm connected to said two side frames to couple with said guide slot; and a pin element coupling with said pin slot, wherein said pin element is movably provided in said pin slot in such a manner that said mouth of said latch member is capable of detaching from said hook end so that said latch member unlocks said hook opening by means of a rotation of said pin element in said pin slot, whereby said guide arm slides in said guide slot for preventing said latch member from having contact with said inner wall of said hook body along said hook hole; an operation handle pivotally connected to said hook body by a pivot arm, wherein said operation handle has a rotation hole for said pin element to pass through so as to enable said pin element to move in said pin slot; and a spring member retaining said latch member in a position that said latch member tends to lock said hook hole, wherein said hook end has a first tenon surface provided along said first side edge of said hook body and a second tenon surface facing towards said hook hole, wherein when said hook end is received in said mouth of said latch member, a top end of said main plate biases against said first tenon surface, and said peripheral edge biases against said second tenon surface, wherein said hook body has a pin hole communicating with said pin slot, wherein when said pin element moves from being in said pin slot to in said pin hole, said top end of said main plate moves downwardly to disengage with said first tenon surface while said peripheral edge still has contact with said second tenon surface.