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Class Information
Number: 5/28
Name: Beds > Sofa bed > Unfolding seat
Description: Devices possessing a section substantially in the position of a seat and pivotally connected forwardly, so it may be overturned outwardly and forwardly through about 180° to form part of the bed bottom. The actual stuffed seat may be padding on one side of this section or be attached shiftably to it (see subclass 59.1) or free from it.

Sub-classes under this class:

Class Number Class Name Patents
5/35 Double unfolding (including zigzag) 12
5/36 Double unfolding with rising inner section 8
5/30 Extension supported 6
5/29 Leg supported 46
5/31 With rising inner section 9

Patents under this class:

Patent Number Title Of Patent Date Issued
8465091 Adjustable office chair Jun. 18, 2013
8438676 Seating unit convertible to bed May. 14, 2013
8429770 Convertible sofa with contained air mattress Apr. 30, 2013
8375483 Daybeds and methods for converting daybeds Feb. 19, 2013
8201290 Convertible sofa with contained air mattress Jun. 19, 2012
7904975 Real-time display of available products over the internet Mar. 15, 2011
7827629 Folding furniture structure convertible between a folded seating condition and an unfolded sleeping condition Nov. 9, 2010
7451504 Sofa sleeper with low-profile head rail Nov. 18, 2008
7360261 Sofa Apr. 22, 2008
6668394 Convertible couch bed Dec. 30, 2003
6161231 Sleeper sofa with an air mattress Dec. 19, 2000
6035464 Folding sofa bed frame structure with two-position TV headrest Mar. 14, 2000
5528777 Sofa sleeper deck with transverse slats Jun. 25, 1996
5493740 Sofa-bed having an articulated folding structure Feb. 27, 1996
5450637 Folding sofa bed frame structure with movable mattress support bar Sep. 19, 1995
5414871 Sofa sleeper deck with welded grid panels May. 16, 1995
5398358 Stretcher Mar. 21, 1995
5129113 System of fabric covering Jul. 14, 1992
4919068 Recreational boat sofa/sleeper Apr. 24, 1990
4616370 Furniture Oct. 14, 1986
4584727 Sofa bed spring improvements Apr. 29, 1986
4523342 Folding bed frame structure for sofa beds or the like Jun. 18, 1985
4504987 Mattress support mechanism for folding sofa-bed Mar. 19, 1985
4443901 Convertible seating furniture Apr. 24, 1984
4398311 Folding sofa-bed mechanism Aug. 16, 1983
4398312 Sofa bed overdeck assembly Aug. 16, 1983
4378609 Sofa bed with mattress longitudinally compressed for storage and method Apr. 5, 1983
4366586 Ottoman roll latch mechanism Jan. 4, 1983
4234976 Foldable furniture assembly Nov. 25, 1980
4221428 Convertible chair and bed Sep. 9, 1980
4068328 Convertible furniture Jan. 17, 1978
4025971 Convertible sofa bed May. 31, 1977
3932902 Convertible sofa bed Jan. 20, 1976

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