Joints and connections – Articulated members – Lockable at fixed position
Patent
1995-11-13
1997-10-21
Kim, Harry C.
Joints and connections
Articulated members
Lockable at fixed position
403 16, 403103, 248478, 248900, F16C 1110
Patent
active
056789459
ABSTRACT:
A detent mechanism that acts between two components that rotate with respect to one another to control rotation from a first set position to at least a second set position. The detent mechanism (10) comprises at least one rotating cam (23) positioned between adjacent surfaces of two components (11 and 16). The cam (23) is spaced from the axis of rotation of the two components (11 and 16). The cam (23) is journalled for rotation on one of the components (11) about an axis that is substantially transverse to the axis of rotation between the two components (11 and 16). The operating surface (25) of the cam (23) comprises at least one cam lobe that is caused to rotate as the two components (11 and 16) rotate. The cam (23) acts to separate the two components (11 and 16). Spring (17) acts to urge the adjacent surfaces together so that a predetermined torque is required to cause relative rotation between the components (11 and 16). The torque is set by the force applied by the spring (17) that results from the extent of compression of the spring (17) when the two components (11 and 16) separate upon rotation. The advantage of the detent mechanism (10) is that sufficient resistance to rotation can be obtained with a relatively light spring (17) due to the high rate of lift provided by the cam (23).
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Britax Rainsfords Pty Ltd.
Kim Harry C.
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