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Class Information
Number: 285/298
Name: Pipe joints or couplings > Variable length
Description: Subject matter wherein one member is connected to the other by an intermediate element capable of significant contraction and expansion or wherein one member projects into or telescopes with the other member and provides relative movement therebetween.










Sub-classes under this class:

Class Number Class Name Patents
285/303 Step adjustment 46
285/302 Telescopic with relative motion 273
285/299 With bellows seal 61


Patents under this class:
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Patent Number Title Of Patent Date Issued
8246082 Adjustable sprinkler head riser with cushioning region Aug. 21, 2012
8220843 Sealing joint for connecting adjoining duct pieces in an engine exhaust system Jul. 17, 2012
8136544 Sealing arrangement with a segmented seal and pressure relief Mar. 20, 2012
7959191 Water flow through pole with locking mechanism Jun. 14, 2011
7677607 Adjustable fluid coupling assembly Mar. 16, 2010
7481461 Device which is expandable to engage the interior of a tube Jan. 27, 2009
7303146 Pipe fitting with length adjustment Dec. 4, 2007
7111873 Slide coupling fitting for connecting conduits Sep. 26, 2006
6983957 Compressed seal for a movable joint Jan. 10, 2006
6959880 Pipe fitting with length adjustment Nov. 1, 2005
6904941 Helically formed cylinder of varying length and diameter Jun. 14, 2005
6719331 Telescopic tube with water supply Apr. 13, 2004
6592152 Joint structure for filtration membrane module Jul. 15, 2003
6581978 Connector tube for a turbine rotor cooling circuit Jun. 24, 2003
6565128 Device and method for coupling a fluid rail with fuel injectors May. 20, 2003
6457934 Connector tube for a turbine rotor cooling circuit Oct. 1, 2002
6422610 Deformable fluid supply line Jul. 23, 2002
6409226 "Corrugated thick-walled pipe for use in wellbores" Jun. 25, 2002
6305722 Telescopic tube, in particular for sprinkler systems Oct. 23, 2001
6209927 Isolation device and fluid connection Apr. 3, 2001
6179339 Seal rings for low loss flexible coupling of gas conduits Jan. 30, 2001
6176526 Expansion joint Jan. 23, 2001
6142390 Nozzle assembly for a spray head Nov. 7, 2000
6098312 Exhaust vent adapter for a clothes dryer Aug. 8, 2000
6044904 Wellhead assembly Apr. 4, 2000
6006399 Telescopic tubular extension particularly for electric household appliances and cleaning machines in general Dec. 28, 1999
5927758 Pivotable vacuum cleaner tube shaft Jul. 27, 1999
5904377 Pipe fitting May. 18, 1999
5899506 Confining ring set suiting wider range of diameter of pipes May. 4, 1999
5868060 Quick-release cam lock Feb. 9, 1999
5823578 Extensible metallic tube structure Oct. 20, 1998
5819326 Connecting apparatus for a toilet and a drainpipe Oct. 13, 1998
5746453 High temperature inline expansion joint May. 5, 1998
5624139 Elastomeric hose coupling Apr. 29, 1997
5601316 Bellows for connecting hoses or apparatus for operation in a vacuum Feb. 11, 1997
5588685 Push-pull pipe joint Dec. 31, 1996
5577895 Submerged pump unit having a variable length pipe assembly Nov. 26, 1996
5573284 Expansion joint for hot pipes Nov. 12, 1996
5542718 Adjustable tail ground joint Aug. 6, 1996
5462311 Telescoping wand for vacuum cleaners Oct. 31, 1995
5421621 Packing manifold for slip-type expansion joints Jun. 6, 1995
5378016 Connecting element for conduit segments through which hot flue gas can flow Jan. 3, 1995
5354104 Flexible coupling for pipework Oct. 11, 1994
5340160 Thermoplastic saddle in two parts for repairing or renovating a pipe line with branch pipe and repaired or renovated pipe with a saddle Aug. 23, 1994
5286063 Ball and socket floating seal assembly Feb. 15, 1994
5248850 Electrical box connector conduit Sep. 28, 1993
5248172 Adjustable fluid transfer apparatus Sep. 28, 1993
5182885 Extendable wall sleeves Feb. 2, 1993
5174613 Kit for constructing an expansion joint for joining pipes Dec. 29, 1992
5160174 Telescoping pipes and application for such telescoping pipes in fire sprinkler systems Nov. 3, 1992

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