Patent ID: 7437806
Filing Date: 2008-10-21
Classification: F16B,Y10T

Abstract:
1. A safety hook comprising: a hook body having a base segment that has front and rear end portions, an arcuate arm segment that extends upwardly from said base segment, and a hook end segment that extends from said arcuate arm segment and that cooperates with said front end portion of said base segment to define a hook mouth of said hook body, said rear end portion of said base segment being formed with an elongate groove that is defined by a groove-defining wall which has a lower surface; a latch locking unit pivoted to said hook body so as to be rotatable relative to said hook body about a first axis between restrained and unrestrained positions, said latch locking unit including a limiting rod that extends through said elongate groove in said rear end portion of said base segment, that is in sliding contact with said lower surface of said groove-defining wall, and that is parallel to said first axis; and a latch unit pivoted to said front end portion of said base segment so as to be rotatable relative to said hook body about a second axis between locked and unlocked positions, said second axis being parallel to said first axis, said latch unit having a latch arm that engages said hook end segment of said hook body when said latch unit is disposed at the locked position, and that is disengaged from said hook end segment of said hook body when said latch unit is disposed at the unlocked position, said latch unit further having a limiting arm unit that extends toward said limiting rod, said limiting arm unit having a free end that is disposed above said limiting rod when said latch unit is disposed at the locked position and when said latch locking unit is disposed at the restrained position, and that presses said limiting rod to abut against said lower surface of said groove-defining wall when said latch unit starts moving from the locked position toward the unlocked position and when said latch locking unit is disposed at the restrained position, thereby preventing rotation of said latch unit about said second axis, wherein said elongate groove is arcuate in shape and has front and rear closed ends, said limiting rod being moved to said front closed end when said latch locking unit is disposed at the restrained position, and being moved to said rear closed end when said latch locking unit is disposed at the unrestrained position.