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https://www.freepatentsonline.com/6651784.html
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Important conclusion: the handbrake lever must have long travel. Adjust it to 3 clicks, as most garages do, and it will stop working!
The other conclusion: put some silicone or PFPE grease between the lever 40 and the unnamed rubber seal. PFPE is safer, as I am not sure whether they use silicone or any other kind of rubber (silicone rubber swells on contact with silicone grease).
![Image](http://www.freepatentsonline.com/6651784-0-large.jpg)