Hook with unhooking function
Title：
Hook with unhooking function
Application Number：
 02148869
Application Date：
 2002/11/22
Announcement Date：
 2003/03/26
Pub. Date：
Publication Number：
 1405461
Announcement Number：
 1230375
Grant Date：
 2005-12-7
Granted Pub. Date：
 2005-12-7
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 B66C 1/26
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Mao Zhu, Gui Liangjin, Fan Zijie
Key Words：
 Hook, unhooking function
Abstract：
 A lift hook with the function of unhooking relates to a crampon applicable to wharves, railway stations, mines and building sites. It consists of a ring, two semi-rings for carrying weights and an unhook mechanism. When the two semi-rings are closed, the lower part of its internal circle forms a V structure. The unhook mechanism employs an autolockable ahnger, one end of which is articulated to a semi-ring, and the other end is buckled with the other semi-ring. The plane where the hanger contacts the semi-ring and the tangential direction of the running trajectory of the unhook mechanism form a fall-in angle of 2-3 degree. Apart from the functions of safe lifting and smooth unhooking, the invention is not limited in travel range, and does not need any auxiliary electric circuit or gas pipe.
Claim：
Priority：
PCT：
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2008-4-17
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