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Class Information
Number: 49/200
Name: Movable or removable closures > Up-and-over type; e.g., moves from vertical to withdrawn horizontal overhead position > With operator > And counterbalance
Description: Device provide with additional means acting against the force of gravity for balancing the closure in an adjusted position.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8590209 Air spring counterbalance Nov. 26, 2013
8375635 Apparatus for opening and closing overhead sectional doors Feb. 19, 2013
8327583 Counter weight door and pulley assembly therefore Dec. 11, 2012
8245446 Tilt-up door Aug. 21, 2012
8179275 Spring failure detection system and method May. 15, 2012
7686061 Winding assembly for door counterbalance system Mar. 30, 2010
7607263 Door operator system Oct. 27, 2009
7537042 Door operating mechanism and method of using the same May. 26, 2009
7484332 Door comprising a locking device Feb. 3, 2009
7441372 Balancing device for a suspended element Oct. 28, 2008
7367160 Door operator system May. 6, 2008
7350333 Brake device for garage doors and the like Apr. 1, 2008
7311130 Controlled drive for a garage door panel for the like Dec. 25, 2007
7246647 Overhead door locking operator Jul. 24, 2007
7234502 Overhead door apparatus with enclosed counterbalance mechanism Jun. 26, 2007
RE39504 Counterbalance system for upward acting door Mar. 13, 2007
7174673 Jack-shaft operator assembly having connecting plate secured by a coupler to a drive member Feb. 13, 2007
7108835 Fischer-tropsch slurry reactor cooling tube arrangement Sep. 19, 2006
7059379 Low head room overhead door system with adjustable short radius track section Jun. 13, 2006
7017302 Balance control system for a movable barrier operator Mar. 28, 2006
6983785 Door operating mechanism and method of using the same Jan. 10, 2006
6959751 Winding system, rolling door assembly including the same and kit for assembling the winding system Nov. 1, 2005
6926061 Cable tensioner and shock absorber for a door Aug. 9, 2005
6883579 Drive system for garage door Apr. 26, 2005
6862845 Drop-catch mechanism for an overhead door Mar. 8, 2005
6742564 Spring force safety locking system for sectional doors Jun. 1, 2004
6735905 Ratcheting winding cone May. 18, 2004
6695033 Guide device for winding shaft of a material handling door comprising a flexible curtain Feb. 24, 2004
6694673 Eccentrically mountable plug for counterbalancing systems of garage doors and the like Feb. 24, 2004
6684931 Counter weight door Feb. 3, 2004
6655088 Safety break for an overhead door Dec. 2, 2003
6651723 Garage door opening/closing system Nov. 25, 2003
6561256 Extension spring counterbalance system May. 13, 2003
6560927 Counteraction system for a sectional door May. 13, 2003
6554047 Guide track assemblies and mounting brackets for upward acting doors Apr. 29, 2003
6502281 Plug for operatively connecting torsion springs to overhead shafts of counterbalancing systems used for garage doors and the like Jan. 7, 2003
6442897 Counterbalance system cable drum for sectional doors Sep. 3, 2002
6408925 Counterbalancing apparatus for roll-up door Jun. 25, 2002
6401793 Spring force safety locking system for sectional doors Jun. 11, 2002
6378170 Security seal for collars used to tension spring in garage door assemblies Apr. 30, 2002
6325134 Disconnect for sectional door operation Dec. 4, 2001
6164014 Cable control device for sectional overhead door Dec. 26, 2000
6145568 Object maneuvering arrangement Nov. 14, 2000
6134835 Counterbalance system for upward acting door Oct. 24, 2000
6125582 Spring winder support for door counterbalance system Oct. 3, 2000
6122862 Door with a weight-balancing device with helical springs Sep. 26, 2000
6105312 Sectional gate Aug. 22, 2000
6088964 Door lifter Jul. 18, 2000
6082430 Garage door safety bracket Jul. 4, 2000
5949810 Laser guide line system with cylindrical optic element Sep. 7, 1999

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