The improved anchoring bolt device of the present invention is adapted to be inserted through an opening in a wall such as ceiling, sidewall or floor and also openings in other walls, such as those of furniture, mattresses, appliances, etc., so as to anchor fixtures, appliances, furniture, etc., to the...http://www.google.es/patents/US4573844?utm_source=gb-gplus-sharePatente US4573844 - Anchoring bolt device
