Patent ID: 7124469
Filing Date: 2006-10-24
Classification: E05F,E05Y,Y10T

Abstract:
1. An automatic sliding door closure device, the device comprising: a housing sized and shaped for attachment to an end of a sliding door during use; a pulley rotatably mounted within the housing; a first gear rotatably mounted within the housing having a plurality of radially spaced teeth; a cable having an exterior end for attachment to a door frame during use and an interior end connected to the first gear rotating the first gear during use; tensioning means engaged with the first gear tensioning movement of the first gear; a second gear within the housing having a plurality of radially spaced teeth in meshed relation with the teeth of the first gear; second tensioning means engaged with the second gear tensioning movement of the second gear during movement of the second gear in an opposite direction from movement of the first gear; a connecting arm connected to the housing; an airtight cylinder oriented parallel with a sliding door track of the sliding door during use having a hollow interior cavity; a plunger arm connected to the connecting arm sized and shaped for movement within the hollow interior cavity of the airtight cylinder; a flexible member connected to the plunger arm slidably contacting walls of the hollow interior cavity of the airtight cylinder; and an airflow control valve within a wall of the airtight cylinder.