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Priority to ES1967130231UpriorityCriticalpatent/ES130231Y/en
Publication of ES130231UpublicationCriticalpatent/ES130231U/en
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Publication of ES130231YpublicationCriticalpatent/ES130231Y/en
Adjustable device for closing doors, essentially characterized by consisting of a pneumatic cylinder of simple effect, whose pneumatic chamber is defined between one end of an elongated tubular body and a sliding piston integral with the stem and constituted by a piece in the form of cup followed by an O-ring seal and a second discoidal piece, provided with a perimeter hole of small diameter and immobilized, with interposition of a second O-ring of smaller diameter, by a threaded nut in the terminal area of the sliding rod, the retraction of the cylinder axis by the action of a main spring with a central helical structure and a truncated cone at its ends, which axially surrounds the shank and is limited by the piston-constituent part of the piston and by another piece of similar structure immobilized in the piston. The opposite end of the cylinder body, which is closed by a a second cylindrical piece, convexly terminated and traversed by the stem of the device. (Machine-translation by Google Translate, not legally binding)
ES1967130231U1967-05-101967-05-10
ADJUSTABLE DEVICE FOR DOOR CLOSURE.
ExpiredES130231Y
(en)