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Class Information
Number: 52/109
Name: Static structures (e.g., buildings) > Lazy tong extension unit
Description: Structure comprising a series of diagonal levers pivoted together at their mid-points and at their ends by which arrangement the device as a whole can be extended and retracted.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8371088 Deployable truss with integral folding panels Feb. 12, 2013
8186121 Support device for elements on a piece of space equipment with flexible deploying arms May. 29, 2012
7941978 Deployable heirarchical structure May. 17, 2011
7640943 Collapsible shelter with flexible, collapsible canopy Jan. 5, 2010
7604212 Collapsible frame having a base mechanism Oct. 20, 2009
7556054 Foldable frame element and system with tension lock Jul. 7, 2009
7100333 Loop assemblies having a central link Sep. 5, 2006
7044146 Portable shelter with rolling element bearings May. 16, 2006
6981350 Projection screen apparatus Jan. 3, 2006
6926021 Erectable canopy with reinforced roof structure Aug. 9, 2005
6920889 Collapsible shelter with flexible, collapsible canopy Jul. 26, 2005
6901714 Tensegrity unit, structure and method for construction Jun. 7, 2005
6739098 Retractable structures comprised of interlinked panels May. 25, 2004
6701949 Erectable canopy with reinforced roof structure Mar. 9, 2004
6591571 Hub assembly for collapsible display panel Jul. 15, 2003
6502597 Erectable canopy with reinforced roof structure Jan. 7, 2003
6223482 Portable, easily composable supporting skeleton May. 1, 2001
6219974 Reversibly expandable structures having polygon links Apr. 24, 2001
6152157 One-touch assembling collapsible tent frame Nov. 28, 2000
6148835 Temporary housing frame Nov. 21, 2000
6141934 Folding frame system with foldable leg assembly and method of erecting a folding frame system Nov. 7, 2000
6109283 Retractable enclosure system Aug. 29, 2000
6082056 Reversibly expandable structures having polygon links Jul. 4, 2000
6050365 Scissors-type work platform lift machine with electro-mechanical based lift actuation arrangement Apr. 18, 2000
5857648 Precision deployable boom assembly Jan. 12, 1999
5845451 Telescoping polygonal figure Dec. 8, 1998
5761871 Framework structure Jun. 9, 1998
5657584 Concentric joint mechanism Aug. 19, 1997
5490532 Adjustable tension shelter assembly Feb. 13, 1996
5351843 Folding display frame for forming column-like structures Oct. 4, 1994
5327700 Collapsible modular display tower assembly Jul. 12, 1994
5297368 Movable wall system Mar. 29, 1994
5290050 Collapsible basket structure Mar. 1, 1994
5275188 Modified folding tent Jan. 4, 1994
5251412 Pantographically movable support apparatus Oct. 12, 1993
5203134 Pivotal frame connector Apr. 20, 1993
5203126 Slidable foot assembly for collapsible display Apr. 20, 1993
5167100 Deployable structures Dec. 1, 1992
5145029 Self-storing maintenance stand for a scissor lift aerial work platform Sep. 8, 1992
5125205 Display frame with folding display attachment devices Jun. 30, 1992
5123550 Collapsible light-weight framework for exhibition use Jun. 23, 1992
5121765 Portable collapsible enclosure Jun. 16, 1992
5115623 Display system May. 26, 1992
RE33710 Portable shelter assemblies Oct. 8, 1991
5038532 Deployable spatial structure Aug. 13, 1991
5024031 Radial expansion/retraction truss structures Jun. 18, 1991
4995212 Collapsible framework Feb. 26, 1991
4986016 Folding display frame with offset hub configuration Jan. 22, 1991
4947884 Collapsible canopy with auto erect roof support structure Aug. 14, 1990
4942686 Portable display system Jul. 24, 1990

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