Patent ID: 8756759

Claim:
A door closing device ( 300 ), comprising a door closer ( 200 ) and a fastening plate ( 100 ) for this door closer ( 200 ), the fastening plate ( 100 ) having a receptacle side ( 102 ) provided for receiving the door closer ( 200 ) and having a support side ( 101 ) opposite to the receptacle side ( 102 ), wherein the receptacle side and the support side are separated by a peripheral edge ( 103 ), and the door closer ( 200 ) having a door closer housing ( 201 ), wherein the door closer housing receives the closing mechanism and/or closing electrical system, and has a collar section ( 203 ) at least partially overlapping and covering the peripheral edge ( 103 ) of the fastening plate ( 100 ) in the fastened state, wherein at least one projection ( 105 a - 105 d ) protruding outward on the edge is implemented on the peripheral edge ( 103 ) of the fastening plate ( 100 ), and at least one recess ( 205 a - 205 d ) corresponding to the projection ( 105 a - 105 d ) on the fastening plate ( 100 ) is arranged in the collar section ( 203 ) of the door closer ( 200 ), and wherein the at least one recess is provided for the formfitting interlocking engagement of the projection ( 105 a - 105 d ) on the fastening plate ( 100 ) upon the fastening of the door closer ( 200 ) on the fastening plate ( 100 ), in order to cause both alignment and also locking of the door closer ( 200 ) to be fastened relative to the fastening plate ( 100 ) through this engagement.