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(11)    Patent No :    AP 1874    (73) Applicant(s)       
(21)    Application No :    AP/P/2005/003333    XIE Xingyun, 1 Floor West 72 Building, Tong Zi Po, River       
            West, Changsha City, Hunan 410013,       
                   
(22)    Filing Date :    10.11.2003    Peoples Republic of China       
(24)    Date of Grant &    07.08.2008           
                   
(45)    Publication :

(30)    Priority Data            (72) Inventors   
    (33) Country    (31) Number    (32) Date    XIE Xingyun, China   
    CN    02150200.5    16.11.2002    (74) Representative   
(84)    Designated State           
                   
    GM  GH   KE    LS   MW  MZ    SL   SD   SZ    FISHER CORMACK & BOTHA   
    T Z   UG   ZM   ZW               
(51)    International    Classification    F16D 59/00 (2006.01)    F16D 13/22 (2006.01)   
            F16D 13/24 (2006.01)    F16D 65/14 (2006.01)   

(54)    Title

A shaft coupling unit

(57)    Abstract

The present invention discloses a coupling device for a shaft which includes a coupling disk (1), a disk (2), a force generating source member (3), a first and second concave-convex assemblies (4,5), and a pull rod (14). The first and second concave-convex assemblies (4,5) are configured to be press engagement arrangement in which rotational angular displacement and axial displacement relative to each other is operable. The first concave-convex assembly (4) and said disk (2) are configured to be a press engagement arrangement in which rotational and sliding angular displacement between said first concave-convex assembly (4) and said disk (2) relative to each other

is operable. An external force association member (6) is provided between the

first concave -convex assembly (4) and an external force member (7). The external force association member (6) and the concave -convex assembly (4) are configured to be press engagement arrangement in which axial sliding displacement relative to each other is operable. The concave -convex

assembly
(5) is mounted on the coupling disk (1), and two ends of the force generating

source member (3) are coupled with the coupling disk (1) and the disk (2). Upon operation of the force generating source member (3), the disk (2)

(56)    Documents Cited :    CN 1 397 743 A    US 6 588 552 A    US 2002/0033308    US 6 508 336 A

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