helical hinge

helical hinge

A special type hinge for a double-acting door.
References in periodicals archive ?
The unit has a unique 250 degree helical hinge and precision aluminum follower that allows the door to swing in both directions, distributing the load evenly and eliminating the use of roller bearings.
The ImpacDor HD-175 has a 250[degrees] helical hinge and precision aluminum follower that allows it to swing in both directions, distributing the load evenly and eliminating the use of roller bearings.
Furthermore, the door's helical hinge enables it to open a full 125[degrees] in both directions; with more clearance, tighter turning is possible.