Concealed door positioning device

Details Concealed door positioning device Concealed door positioning device

E - Fixed Constructions

05

C

E05C 17/02 (2006.01) E05C 17/28 (2006.01) E05F 3/10 (2006.01)

Patent

CA 2051465

ABSTRACT A door positioning device comprising a housing concealed in a door jamb and a mechanism mounted in the housing for holding the door open in one or more selected positions. The mechanism comprises a cylinder mounted in the housing wherein a slidable piston is mounted. Linkage connects the piston to linkage mounted onto the door, in such a way that when the door opens, the linkage forces the piston upward in the cylinder. A shift integral with the piston depends from the piston and is moveable with it. A structure in the housing engages said shaft when the shaft moves upward a predetermined distance and gently holds the shaft and piston in a fixed position, thereby holding the door open at a selected position. In this way when a slight pressure is exerted on the door it overcomes the force holding the shaft with the structure in the housing, allowing the door the close.

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