Patent ID: 6976289

Claim:
A self activated arresting door closer comprising: a cylinder, a piston reciprocally displaceable within said cylinder, a piston rod connected to said piston, said piston rod having a free end extending beyond the end of said cylinder, a compression spring normally biasing said piston toward a door closing position, and a self activated arresting mechanism for arresting an associated door in an open position, said arresting mechanism including a cam means and a complementary follower means, one of said means connected to said piston rod and the other of said means connected to said cylinder wherein one of said means is fixedly connected and the other of said means is rendered rotatable relative to said fixed means, said cam means including an indexing cam, a plurality of arresting cams spaced from said indexing cam to define a circumscribing channel therebetween, and said arresting cams defining between adjacent pairs thereof a channel opening in communication with said circumscribing channel.