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Class Information
Number: 4/241
Name: Baths, closets, sinks, and spittoons > Seat > Counterbalanced or spring biased
Description: Means for counterbalancing or causing a seat to be swung upward, generally by a weight or spring.










Patents under this class:

Patent Number Title Of Patent Date Issued
8499368 Space-saving toilet system Aug. 6, 2013
8479323 Spring-mounted vertically held toilet seat Jul. 9, 2013
8214932 Automatic self-closing toilet seat assembly Jul. 10, 2012
8006323 Toilet seat system Aug. 30, 2011
7331067 Toilet seat lifting and lowering device Feb. 19, 2008
7168106 Cam-actuated toilet seat lifting device Jan. 30, 2007
6996858 Toilet seat apparatus Feb. 14, 2006
6934974 Force adjustable toilet seat lifting and lowering mechanism Aug. 30, 2005
6851130 Sanitary toilet seat apparatus Feb. 8, 2005
6775858 Elevating toilet seat with lid opening mechanism Aug. 17, 2004
6775858 Elevating toilet seat with lid opening mechanism Aug. 17, 2004
6763530 Auto-reversible toilet seat mounting structure Jul. 20, 2004
6510562 Toilet seat lifting device Jan. 28, 2003
6470502 Automatically raised toilet seat apparatus Oct. 29, 2002
6240574 Method and arrangement for automatically raising a toilet seat Jun. 5, 2001
6230335 Normally upright toilet stool-seat assembly May. 15, 2001
6081936 Method and arrangement for automatically raising and lowering a toilet seat Jul. 4, 2000
6030039 Rim chair Feb. 29, 2000
6012180 Toilet seat lifting device Jan. 11, 2000
6009568 Opening-closing device of western style toilet seat and seat cover Jan. 4, 2000
6000069 Compound torque hinge Dec. 14, 1999
5940896 Sanitary toilet seat apparatus Aug. 24, 1999
5898953 Rising seat for seating including toilets May. 4, 1999
5896592 Automatic toilet seat lifting device Apr. 27, 1999
5781938 Toilet seat lowering device Jul. 21, 1998
5754985 Toilet seat apparatus May. 26, 1998
5642532 Self-raising commode seat Jul. 1, 1997
5461734 Automatic toilet seat lowering Oct. 31, 1995
5437063 Automatic toilet seat lifting apparatus Aug. 1, 1995
5435017 Apparatus for automatically but delayedly lifting a toilet seat Jul. 25, 1995
5414876 Toilet assembly having a hydraulically rising seat May. 16, 1995
5394570 Toilet seat ring automatic raising apparatus as electromagnetically actuated Mar. 7, 1995
5341518 Commode seat lift apparatus Aug. 30, 1994
5291618 Automatic toilet seat lift mechanism Mar. 8, 1994
5243738 Adjustable tension hinge Sep. 14, 1993
5177818 Toilet-seat flush-valve operating device Jan. 12, 1993
5138724 Delayed auto-rising toilet seat Aug. 18, 1992
5020165 Toilet seat raising apparatus Jun. 4, 1991
4985939 Toilet seat hinge assembly Jan. 22, 1991
4984666 Speed governor for toilet or the like Jan. 15, 1991
4951323 Automatic seat lifting device for water closets Aug. 28, 1990
4910810 Toilet seat mechanism Mar. 27, 1990
4428083 Automatic lavatory seat Jan. 31, 1984
4426743 Toilet seat lifting device Jan. 24, 1984
4342124 Seat and cover assembly for a toilet bowl Aug. 3, 1982











 
 
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