Each link assembly includes first and second main link members and first and second sub-link members.

Each link mechanism includes first to fourth link members (61a ∩ 61d, ...) and first to fourth joints (61e ∩ 61h, ...) for connecting the link ends rotatably with one another.

Other versions include rings with multiple link members.

One or more bonding members may be disposed in the space.

The frame also comprises variable-length spacer elements that are each connected between the joining elements of two successive ribs.

The length of each spacer element can be varied in order to adjust the space between the joining elements of two successive ribs.

4. the liaison bodies of this exchange of information are listed in Appendix 2.

4. the liaison bodies of this exchange of information are listed in Appendix 2.

4. the liaison bodies of this exchange of information are listed in Appendix 2.

4. the liaison bodies of this exchange of information are listed in Appendix 2.

A pair of input members (12, 14) are coupled by plural axially extending links (16).

The joint (6) has a double joint structure configured of the first link member (7), the intermediate link members (8A, 8B), and the second link member (9).

A first and second linkage member interconnects the first and second pivotal connectors.

In an alternative embodiment the linking and locking means are constructed of metal.

One of the links is provided with a hook, and selective actuation of one of the links drives the hook from a closed to an open orientation for latching the bracket to a striker.