Machine element or mechanism – Elements – Pawls and ratchets
Patent
1992-03-30
1993-06-01
Luong, Vinh T.
Machine element or mechanism
Elements
Pawls and ratchets
74577R, 74578, 74577M, 74DIG3, 74186, 192 41R, 192 45, 192114R, 188 78, G05G 100, B60R 2502, F16D 1106
Patent
active
052149820
ABSTRACT:
A ratchet wheel having a locking device, includes a housing, a ratchet wheel disposed pivotally in the housing in such a manner that one end of its axle couples with an external rotating object, a braking member having a shank provided at one end thereof with a wedge angle and at other end thereof with a pivot, and a lock. The pivot is coupled pivotally with the housing in such a way that it moves between a first position and a second position. When the braking member is at the first position, its wedge angle meshes with ratchet wheel. When the braking member is at the second position, its wedge angle disengages from the ratchet wheel. The lock has a lock core capable of moving between a locking position and an unlocking position. The locking position of the lock core corresponds to the first position of the braking member, while the unlocking position of the lock core corresponds to the second position of the braking member.
REFERENCES:
patent: 1844345 (1932-02-01), Carr
patent: 1850898 (1932-03-01), Smith
patent: 4509349 (1985-04-01), Partridge
patent: 4576024 (1986-03-01), Weber
patent: 4581909 (1986-04-01), Weber
patent: 4754859 (1988-07-01), Ouchi et al.
patent: 4759203 (1988-07-01), Lieb et al.
patent: 5067598 (1991-11-01), Ritter et al.
patent: 5099972 (1992-03-01), Ouchi
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