Patent ID: 6493991
Filing Date: 2002-12-17
Classification: E05F,E05Y,E06B

Abstract:
A revolving door system for installation in a doorway defined by an opening in a wall of a building, said revolving door system comprising:a pair of outer walls of substantially equal length and height, each outer wall being attachable to a side of the doorway in a position which is substantially perpendicular to said building wall; a hollow center core disposed between said outer walls, said center core comprising a pair of side walls positioned in substantially parallel spaced relationship to said outer walls, each side wall having a length substantially equal to the length of each of said outer wall, said center core further comprising two curved end portions, each curved end portion connecting respective adjacent ends of said side walls, said side walls and end portions forming an outer surface of said hollow center core; a ceiling member extending above said center core and said outer walls, said ceiling member, said center core and said outer walls defining two passageways for the doorway, each on a respective side of said center core: upper and lower rails disposed on said center core, said rails extending horizontally around and parallel with the outer surface of said center core; a plurality of doors, each door having an upper portion and a lower portion; each door including upper and lower suspension devices, attached to said upper and lower portions respectively of said door, said upper and lower suspension devices being movably engaged with said upper and lower rails, respectively, so as lo enable movement along said upper and lower rails, thereby enabling movement of each of said doors along said passageways; a door driving chain coupled to said upper suspension devices through pulling bars and moving along a predetermined path; a rotation driver coupled to said door driving chain for driving said chain along said predetermined path; and each door including a door supporting structure, each of said door supporting structures comprising a carrier bar coupled to a respective one of said upper suspension devices, each of said carrier bars extending in parallel with a plane defined by said ceiling member and having a length substantially equal to a width of each door; each of said carrier bars being attached to the upper portion of a respective one of said doors and rotatably supporting said door at an end portion of said door proximate said center core and detachably holding an end portion of said door distal from said center core; and the lower portion of each of said doors being rotatably supported by a respective one of said lower suspension devices which is attached to said end portion of said door proximate said center core.