BUILT-IN DOOR CHECK

Abstract: The purpose of my invention is to make more convenient the automatic opening and closing of doors. It is an automatic cylinder-shaped gadget (9) whose purpose is to close door; it functions hydraulically thanks to its springs (8). It is to be fitted into the door and remains invisible. To activate the door-check it is sufficient to remove the safety-catch positioned on the external side of the plate. It is equipped with a click regulation used for closing the door. It has no external regulator for hydraulic oil, because the adjustment takes place automatically inside the piston, which functions on the basic of a definitive metering. It is very resistant.

Description: BUILT-IN DOOR CHECK TECHHICAL FIELD My invention consist of visual disappearance of the gadget which, once it is inserted inside the door, leaves the external aspect unchanged-. Thanks to ita cylindrical form and the fact that is easy to fit in, it can be fitted in aluminium, ivon and wooden doors. The idraulic piston can work following two sistems: 1) Double piston system( IG.4°) , 2) Single piston system with internal spherical valve ( FIG BACKGROUND ART The pre—exstig techinique of ole door—checks consisted of an external arm which pushed the door in order to shut it_ The arm ivas scissor— hape . As a result, ito old—fashioned £ατ__εi__DHs aj3eCoπιpleted different from that ,of my invention, besides, it had a very inelegant appearance. DISCLOSURE OF INVENTION The purpose of the built—in door check is to close a door automatically when it has bem left open by means of the forward and bachward sliding of the piston; in the internal starter shaft; by so doing, it opens and b blochs the oil passage in order to lubrificate the sistem_( j .G.4) "The fastening of the door is activated by a spring, which in turn is regu lated by the piston. ( FIG * 2') on sliding, the piston blochs the oil influx, letting only the necessary amount in order for the door to close slowly. On fastening, the click, which denotes the definitive fastening of the door, is obtained by ividening a part of the cylinder which, given that i it is wider than the diameter, lets the piston slide without any resistance. The starter shaft consist of 180° arc—shaped arm, a return spring and a hidraulic piston (FIG.1) ) * A H three conponents are inserted in a ci- linder. A plate with side holes at the far ends so that,it can be fixed anto the door and a central tunnel- (FIG.1 Shapped one, is attached to ono of the ends of the cilinder_( The closing click can be fixed or adjustable, the latter being possible in two ways: 1) by treading the starter shaft, which screaviπg on to one of the ends of the arc-shapped arm leads to the lenthening or shortening of the starter shaft; tά. this way it carries the piston along witfc it; the piston is thrueeshifted to the deired position and bringo about the more or ifeess strog click. 2) by tightening the screw positioned on the plate. BRIBKIDESCRIPTION OF DRAWINGS FIG.1 ) - Illustrates allrfcfae details or componente of the door-check. FIG.2) - Illustrates a cross-section of the cylinder shoving the maximum diameter of the click and poϋtiwhere the piston slide in. inside the shortest diameter. FIG.3 - Illustrates the connecting starter shaft of the componentes in eluding the arm, the click regulation bolt. FIG.4) - Illustrates the starter shaft and the piston and their function inside the cilinder. FIG.5 " ) - Illustrates the dual function of the piston; » FIG.6) - Illustrates the click-regulates fixing plate on the door fra e. FIG.7) - Illustrates the definitive positioning of the door-check., BEST MODE FOR CARRYNG OUT THE INVENTION MY INVention named "BUHT-IN DOOR-CHECK", can be used for closing door of all kinds and models INDUSTRIAL APPLICABILITY In the industrial field, the built-in door-check can be used in banks, shops, offices, dwelling and in any context in which it is necessary to clo close a door automatically without making use of one's hands.

Claims: CLAIMS The door -check consists of: 1) An are-shaped arm which guarantee a 180° opening. FIG.3) 2) A starter shaft with a click regulater. FIG.3) 3) A small piston for the automatic control of the oil passage. FIG.4) 4) A plate which enables the arm to come out. FIG.1 J 5) A cilinder which makes, possible the mstantaneons .click of . the hi raulic piston. FIG.2) 6) A piston alternated to another piston. FIG.5.) All possible modifications which have the same dim and the techique involved in the door—check are claimed.

Inventors: PLATANIA DOMENICO, PLATANIA, DOMENICO
Applicants: PLATANIA DOMENICO, PLATANIA, DOMENICO
Application year: 1999
Main classification: E05F3
IPC codes: E05F3