Locking Gears?

[extrudedfeature]

Hello All,

I am trying to find the name of a product, or part that looks and behaves like the image attached.

Basically I know these Exists but cant think of the name.
I have a fixed object, and another which is pivoted on the peice and moves radially. One of each would be bonded or fixed to the parallel surfaces and would lock together when force is applied to force the two together.

http://imgur.com/JhAzcwx

What is name of these things?

Thanks in advance!

 

[Occupant]

You mean a Hirth coupling. One of the suppliers name is engraved in the face of the coupling in the attached picture.

 

[Jboggs]

Do a search for "toothed coupling" or "toothed clutch". You will find lots of images.