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G a l e K . ShermanT u s t i n , C a l i f .2 7 , 0 3 2A p r . 9 , 1 9 7 0J u l y 2 0 , 1 9 7M c D o n n e l l D o u g l a s C o r p o r a t i o n

l n v e n t o rA p p l . N o .F i l e dP a t e n t e dA s s i g n e eCABIN ATTENDANT EAT9 C l a i m s , 6 D r a w i n g F i g s .US. Cl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297/14

2 9 7 / 6 1 , 2 9 7 / 3 1 6 , 2 9 7 / 3 3 2I n t . Cl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A47c /06F i e l d of Searc h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297/14 61

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1 132 004 3/1915 Friese . . . . . . . . . . . . . . . . . . . . . . 297/141 761 673 6/1930 Laursen. . . 1 . . . 1 . . . . , . .4 297/143 093 414 6 / 1 9 6 3 Eames e t l . . . . . . . . . . . . . . . . . 297/14 XPrimary Exami ner-James C. M i t c h e l lA t t o r n e y s W a l t e r . J a s o n , D o n a l d L _ Royer a n d R o b e r t 0 .

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BACKGROUNI OF THE PR ESENT INVENTIONWhen a n a i r c r a f t t a k e s o f f , l a n d s , o r i s ? y i n g i n a t u r b u l e n te n v i r o n m e n t , c a b i n a t t e n da n t s a r e r e q u i r e d t o b e s e a t e d and

r e s t r a i n themselves w i t h a s e a t b e l t . Except f o r t h e s e occas i o n a l u s e s , t h e s e a t s h o u l d b e i n c o n s p i c u o u s a n d o u t o f t h ew a y . A h i n c o l l a p s i b l e w a l l mounted s e a t i s p r e f e r a b l e f o r t h i sp u r p o s e . F o l d i n g s e a t s a r e u s u a l l y f o u n d i n t a x i c a b s , t h e a t e r s ,a u d i t o r i u m s a n d a l o n g t h e w a l l s o f many b u i l d i n g s . The s e a tb o t t o m u s u a l l y f o l d s o u t f o r u s e a n d i s s u p p o r t e d . b y a l i n k a g ea n d , i n m a n y c a s e s , a s p r i n g d e v i c e i s p r o v i d e d s o t h a t t h e s e a tb o t t o m w i l l a u t o m a t i c a l l y f o l d u p a f t e r t h e o c c u p a n t h a sa r i s e n . However none o f t h e s e known s e a t s d i s p l a y t h e f e at u r e s and a d v a n t a g e s o f t h e c a b i n a t t e n d a n t s e a t o f t h e p r e s e n ti n v e n t i o n .

SUMMARY OF TH PR S NT INVENTIONThe c a b i n a t t e n d a n t s e a t o f t h e p r e s e n t i n v e n ti o n i n one

form i n c l u d e s a b a c k r e s t . th a t i s a t t a c h e d t o s u p p o r t l i n k s t h a ta r e hinged a t t h e t o p t o a mounting frame and p i v o t a l l y t o as e a t bottom frame a t t h e lower e n d . The s e a t bottom frameh a s a n e x t e n d e d arm a t e a c h s i d e , r e a r w a r d l y e x t e n d i n g fromt h e p i v o t p o i n t b e t w e e n t h e s e a t b o t t o m f r a m e a n d t h e s u p p o r tl i n k s . At t h e end of each extended arm i s a r o l l e r which movesa l o n g a v e r t i c a l g u i d e a t t a c h e d t o t h e mounting f r a m e . Whent h e s e a t i s e x t e n d e d t h e l i n k a g e i s s u c h t h a t t h e s e a t bottomf r a m e moves o u t w a r d l y a s i t p i v o t s downward ly and t h e s e a tb a c k r e s t t i l t s f o r w a r d l y a t t h e b o t t o m . A u s h r o d i s c o n n e c t e dt o the s e a t exten de d a r m a n d causes a headrest t o move e r t ic a l l y a s t h e s e a t b o t t o m f r a m e i s p i v o t e d . In a n o t h e r f o r m , t h es e a t b a c k r e s t moves o r w a r d l y from a r e c e s s where t i s housedd u r i n g n o n u s e . When o l d e d , t h e s e a t b a c k r e s t i s v e r t i c a l , w i t ht h e s e a t bottom f o l d e d upward a g a i n s t t h e s e a t b a c k r e s t a n dt h e h e a d r e s t moved downwardly o v e r t h e t o p p o r t i o n o f t h eb a c k r e s t . For a u t o m a t i c c l o s i n g a c o n s t a n t f o r c e a i r s p r i n g i su s e d w h i c h p r o v i d e s a c o n t r o l l e d p o s i t i v e f o r c e w i t h o u t t h ev i o l e n t s p r i n g a c t i o n n o r m a l l y f o u n d i n s u c h s e a t s . I t s r a t e o fr e t r a c t i o n p e r m i t s t h e s e a t b e l t s t r a p s t o r e t r a c t w i t h i n t h em o u n t i n g f r a m e b e f o r e t h e s e a t b o t t o m f r a m e i s c o m p l e t e l yf o l d e d u p . The c a b i n a t t e n d a n t s e a t t h u s p r o v i d e d i s o f s i m p l ed e s i g n a n d r e l a t i v e l y f r e e o f m a i n t e n a n c e p r o b l e m s a n d m a lf u n c t i o n s , y e t p r o v i d e s a t h i n p r o ? l e f o l d e d p a c k a g e when n o tin use.

BRIEF DESCRIPTION OF THE DRAWINGSF I G . l i s a p e r s p e c t i v e view o f a ? r s t embod i ment i n i t s u s ep o s i t i o n ;F I G . 2 i s a s i d e e l e v a t i o n a l view o f t h e s e a t i n u s e p o s i t i o n

and i n w h i c h phantom l i n e s show i t s s t r u c t u r e i n s t o r e d p o s it i o n ;FIGS. 3 and 4 a r e schematic e l e v a t i o n a l views of a ? r s t em

bodiment i n i t s u s e and s t o r e d p o s i t i o n w i t h d e t a i l s removedf o r c l a r i t y i n i l l u s t r a t i n g s e a t a n d h e a d r e s t m o v e m e n t ; a n d

FIGS. 5 and 6 a r e e l e v a t i o n a l v i e w s o f a n o t h e r emb o dimenti n i t s u s e and s t o r e d p o s i t i o n s .

R e f e r r i n g n o w t o FIGS. 1 and 2 t h e r e i s s how n a s e a t m o u n ti n g f r a m e l l t l i n c l u d i n g a p a i r o f v e r t i c a l s p a c e d s i d e s u p p o r t s1 2 shown i n phantom i n e s . These s i d e s u p p o r t s a r e c o n n e c t e da t t h e t o p b y a spacerbar 1 4 and a f l o o r p l a t e I 6 a t t h e b o ttom. T h i s mounting frame m a y be f a s t e n e d t o a f l o o r o ra g a i n s t a w a l l , a s d e s i r e d . C o n n e c t i n g t h e s i d e s u p p o r t s 1 2a c r o s s t h e f r o n t and a t t h e l o w e r p o r t i o n o f t h e s e a t i s a do oro r p a n e l 1 8 b e h i n d which m a y b e s t o r e d s e l e c t e d i t e m s , a sd e s i r e d . A U ~ s h a p e d s e a t b o t t o m f r a m e 20 i s a d a p t e d t or e c e i v e a s u i t a b l e s e a t c u s h i o n 22 o f a p p r o p r i a t e d e s i g n . T h i sU - s h a p e d s e a t b o t t o m f r a m e h a s p i v o t p o i n t s 2 4 i n t e r m e d i a t et h e e n d s o f t h e s i d e l e g s 26 s o t h a t t h e bottom f r a m e 20 mayb e p i v o t a l l y s e c u r e d t o t h e s i d e s u p p o r t s . S u p p o r t l i n k s 28 a r ep i v o t a l l y c o n n e c t e d b y t h e i r u p p e r e n d s a t p i v o t p o i n t s 30 t o

20

25

3 5

4 5

50

55

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2t h e s i d e s u p p o r t s 1 1 2 . T h e y e x t e n d d o w n w a r d l y a n d o u t w a r d l yt o t e r m i n a t e a t t h e i r l o w e r e n d s a t p i v o t p o i n t s 24 t o p i v o t a l l yc o n n e c t w i t h s e a t b o t t o m f r a m e 2 0 . E x t e n d i n g r e a r w a r d l yfrom t h e p i v o t p o i n t s 24 a r e extended arms 32 which t e rm i n a t e i n r o l l e r s 34 a d a p t e d t o r i d e w i t h i n v e r t i c a l g u i d e s 36w i t h i n t h e s i d e s u p p o r t s 1 2 . A t t a c h e d b e t w e e n e x t e n d e d arms32 a n d r e a r w a r d l y o f p i v o t p o i n t s 2 4 i s a s p a c e r b a r 3 8 . An i rs p r i n g 40 i s p i v o t a l l y mounted on f l o o r p l a t e 1 1 6 and h a s ap i s t o n r o d 42 p i v o t a l l y c o n n e c t e d t o t h e s p a c e r b a r 3 8 . T h i sa i r s p r i n g c l o s e s t h e s e a t a t a c o n t r o l l e d r a t e w h e n t h e occup a n t a r i s e s . T h i s a i r s p r i n g combincs a p n e u m a t i c a c t u a t i o nw i t h a t e n s i o n s p r i n g w i t h i n th e a i r chamber and u t i l i z e s a v a r i _a b l e a i r b l e e d t o a d j u s t and c o n t r o l i t s r a t e o f a c t u a t i o n . Sucha i r s p r i n g s p e r s e a r e w e l l known. P r e f e r a b l y , i t s r a t e o f c l o s u r ew i l l b e s u f f i c i e n t l y s l o w t o e n a b l e r e t r a c t i o n o f s e a t b e l t s t r a p s43 w i t h i n t h e mounting f r a m e 1 2 b e f o r e s e a t bottom f r a m e 20i s moved t o i t s s t o r e d p o s i t i o n .

W h e n t h e s e a t bottom frame 20 i s f o l d e d d o w n f o r u s e , t h ep i v o t p o i n t s 24 a r e c a u s e d t o move : f o r w a r d l y i n a c c o r d a n c ew i t h t h e l e n g t h o f t h e e x t e n d e d arms 3 2 , s i n c e r o l l e r s 34 t t h eends o f t h e extended arms 32 remain i n t h e i r v e r t i c a l o r i e n t at i o n w i t h i n v e r t i c a l g u i d e s 3 6 . A p p r o p r i a t e s t o p s 4 4 o n g u i d e s36 l i m i t t h e upward movement o f r o l l e r s 34 in o r d e r t o angul a r l y o r i e n t t h e p l a n e o f t h e U - s h a p e d s e a t b o t t o m f r a m e 2 0r e l a t i v e t o t h e f l o o r f o r optimum s e a t i n g c o m f o r t . S u p p o r tl i n k s 28 have a b a c k r e s t 46 connected t h e r e t o s o t h a t t h eu p p e r p o r t i o n o f t h e b a c k r e s t r e m a i n s a t t h e s u p p o r t l i n kp i v o t a l p o i n t s 3 0 w h i l e t h e l o w e r p o r t i o n t i l t s o u t w a r d l y w i t ht h e l o w e r e n d s o f t h e s u p p o r t l i n k s 2 3 . The l o w e r e n d s o f s u pp o r t l i n k s 2 8 c u r v e o u t w a r d l y t o t e r m i n a t e a t t h e p i v o t p o i n t s24 on t h e s e a t bottom frame 2 0 . T h i s p e r m i t s e x t r a l e n g t h o ft h e extended arms 32 t o t h u s accomm o da te t h e w e i g h t o f t h eo c c u p a n t . The s e a t bottom f r a m e 20 s l i m i t e d i n i t s downwardmovement t h r o u g h t h e s u p p o r t l i n k s 2 8 a n d b y t h e p r o p e rp o s i t i o n i n g o f s t o p s 44 n t h e v e r t i c a l g u i d e s 3 6 .A e a d r e s t 48 s p r o v i d e d a n d i s a d a p t e d t o move u p w a r d l ywhen t h e U - s h a p e d s e a t b o t t o m f r a m e 20 i s movedd o w n w a r d l y . T h i s i s a c c o m p l i s h e d t h r o u g h a l i n k a g e w h i c h i nc l u d e s p u s h r o d s 5 0 p i v o t a l l y c o n n e c t e d a t t h e i r l o w e r e n d s t oc a r s 52 on t h e extended arms 32 r e a r w a r d l y o f p i v o t p o i n t s 2 4 .The u p p e r e n d s o f t h e p u s h r o d s 50 a r e c o n n e c t e d t o s l i d i n gmounting b r a c k e t s 54 which a r e connected a t e a c h end o f Uf r a m e 56 o f h e a d r e s t 4 8 . V e r t i c a l l y o r i e n t e d s l o t s 58 i n Uf r a m e 56 a r e g u i d e d b y g u i d e p i n s 60 t e a c h e n d o f s p a c e r b a r14 a s t h e headrest 4 8 m ov e s up and down. As can be seen i nF I G . 2 , s l o t s 58 a r e s l a n t e d o u t w a r d l y a t t h e i r l o w e r ends 62 t og u i d e t h e h e a d r e s t 4 8 o u t w a r d l y a s i t i s moved d o w n w a r d l y .T h i s p e r m i t s t h e h e a d r e s t 48 t o b e p o s i t i o n e d o v e r t h e u p p e rp o r t i o n o f b a c k r e s t 4 6 .

The a t t e n d a n t s e a t i s shown i n i t s s t o r e d p o s i t i o n b y p h a ntom l i n e s i n F I G . 2 a n d i n i t s p o s i t i o n o f u s e b y s o l i d l i n e s ( a n ddashed l i n e s where t h e s t r u c t u r e i s hidden from v i e w ) a s ac o n v e n i e n c e i n c o m p a r i n g t h e t w o p o s i t i o n s . A d d i t i o n a l ly , t h es t r u c t u r e shown b y phantom l i n e s i s i d e n t i f i e d b y l i k e num e r a l s f o l l o w e d w i t h t h e s u f f i x A . For e x a m p l e , t h e s e a t b o ttom f r a m e s i d e l e g s 2 6 , i n u s e p o s i t i o n , i s shown n s t o r e d p o s it i o n a s 2 6 A , p i v o t p o i n t 2 4 moves r e a r w a r d l y t o s t o r e d p o s it i o n 24A a s e x t e n d e d arms 32 p i v o t downwardly t o t h e p o s it i o n shown a s 32A. As b a c k r e s t 46 p i v o t s back t o s t o r e d p o s it i o n 46A h e a d r e s t 48 moves o v e r i t s t o p p o r t i o n t o p o s i t i o n48A.

The o p e r a t i o n o f t h e a t t e n d a n t s e a t . c a n b e s t be u n d e r s t o o dw i t h r e f e r e n c e t o F I G S . 3 and 4 . I n F I G . 3 t h e s e a t bottomf r a m e 20 i s i n a n o c c u p a n t s u s e p o s i t i o n where i t i s m a i n ~t a i n e d b y t h e w e i g h t o f t h e o c c u p a n t . The l o w e r e n d o f s w i n gi n g s u p p o r t l i n k 2 8 h a s b e e n moved o u t w a r d l y w i t h r e s p e c t t ot h e s i d e s u p p o r t s 12 and c o n n e c t s w i t h t h e s e a t frame 20 a tp i v o t p o i n t 2 4 , a s s h o w n . The e x t e n d e d arm 32 on t h e s e a tf r a m e 2 0 e x t e n d s r e a r w a r d l y f r o m t h e p i v o t p o i n t 2 4 a n d t e rm i n a t e s in r o l l e r s 34 which a b u t a s t o p 44 a t t h e upper end o fv e r t i c a l g u i d e 3 6 . L i n k s 28 a r e s u s p e n d e d from s i d e s u p p o r t s1 2 a t t h e i r upper e n d s which a r e p i v o t a l l y connected a t p i v o tp o i n t 30 t o t h e s i d e s u p p o r t s 1 2 . The p u s h r o d 5 0 h a s e x t e n d e d


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3 , 5 9 4 , 0 3 73t h e h e a d r e s t 48 t o i t s uppermost p o s i t i o n . Wh e n t h e occupanta r i s e s , a i r s p r i n g 40 r e t r a c t s t h e s e a t bottom frame 20 t o i t ss t o r e d p o s i t i o n , a s shown i n F I G . 4 . As t h e p i v o t p o i n t 24 i smoved i n w a r d l y and a s t h e r o l l e r s 34 m o v e downwardly i n t h ev e r t i c a l g u i d e s 3 6 , t h e p u s h r o d 5 0 moves d o w n w a r d l y a n dt h u s t h e h e a d r e s t 48 i s m o v e d t o i t s lower s t o r e d p o s i t i o n a ssh own n F I G . 4 .

Reference i s n o w m a d e t o an a l t e r n a t e f orm s h o w n i n FIGS.5 and 6 . In t h i s embodiment t i s d e s i r a b l e f o r t h e s e a t , i n i t sf o l d e d up o r s t o r e d p o s i t i o n , t o be r e c e s s e d w i t h i n a w a l l s t r u ct u r e so t h a t n o ne o f t h e s e a t s t r u c t u r e extends out i n t o t h ec a b i n . T h i s r e q u i r e s t h e s e a t b a c k r e s t t o m o v e i n t o t h e r e c e s sand b e h i n d t h e s e a t bottom f r a m e i n s t o r e d p o s i t i o n and y e tm o v e outwardly t o a p o s i t i o n of u s e w h e n such u s e i s d e s i r e d .A push r o d a c t u a t i o n a s t h e s e a t bottom frame p i v o t s f o rw a r d l y s s i m i l a r l y u t i l i z e d .

R e f e r r i n g n o w t o FIG. 5 t h e r e i s sh own a w a l l s u r f a c e 70having a r e c e s s 72 i n t o which s e a t s i d e s u p p o r t s 74 m a y bep o s i t i o n e d . I n a manner s i m i l a r t o t h e ? r s t embodiment t h e r ei s a s e a t bottom frame 76 p i v o t a l l y connected a t p i v o t p o i n t 78t o a p a i r o f s w i n g i n g s u p p o r t l i n k s 80 w h i c h , i n t u r n , a r ep i v o t e d a t p o i n t s 82 t o t h e s i d e s u p p o r t s 7 4 . As i n t h e o t h e rembodiment t h e s e a t b o t t o m f r a m e 76 h a s r e a r w a r d l y e x t e n di n g arms 8 4 . These extended arms 8 4 t e r m i n a t e i n a s l i d e 86which moves v e r t i c a l l y w i t h i n a s l i d e g u i d e 8 8 a f f i x e d t o t h es i d e supports 7 4 . The extended arms 8 4 a l s o have a connecti n g s p a c e r b a r 90 t h e r e b e t w e e n a n d p i v o t a l l y c o n n e c t e dt h e r e t o i s a p i s t o n r o d 92 o f a i r s p r i n g 94 w h i c h , i n t u r n , i sp i v o t a l l y m ounte d t o a ? oor l a t e 9 6 , a l l i n a manner s i m i l a r t ot h a t i n t h e ? r s t embodiment. At t h e f r o n t lower p o r t i o n o f t h es i d e s u p p o r t s 74 i s a p i v o t a l door 98 b e h i n d which m a y b es t o r e d s e l e c t e d i t e m s . As b e f o r e , t h e a i r s p r i n g 94 c a u s e s t h es e a t bottom frame 76 t o p i v o t upwardly w h e n n o t i n u s e t o t h es t o r e d p o s i t i o n a s show n i n F I G . 6 . At t h e bottom o f s l i d e 88 sa n a d j u s t a b l e s t o p member 1 0 0 a g a i n s t w h i c h t h e s l i d e 86a b u t s i n t h e f o l d e d u p p o s i t i o n o f t h e s e a t f r a m e 7 6 . A e r t i c a la d j u s t m e n t o f t h i s s t o p member 1 0 0 w i l l r e g u l a t e t h e a l i g nment o f t h e s e a t bottom frame 76 w i t h t h e w a l l s u r f a c e 70when n s t o r e d p o s i t i o n . V e r t i c a l l y movable w i t h i n t h e s l i d e 88i s a l o w e r end 102 o f a push r o d 104 which s adapted f o r v e r t ic a l m o v e m e n t a t t h e r e a r of t h e s i d e s u p p o r t s 7 4 . The upperend o f p u s h r o d 104 t e r m i n a t e s i n a s l i d e 106 which s a d a p t e df o r v e r t i c a l m o v e m e n t i n an upper g u i d e 1 0 8 . A i n k 110 i sp i v o t a l l y mounted a t one end t o t h e s l i d i n g b l o c k 106 and i t so t h e r e n d i s p i v o t a l l y mounted t o t h e t o p p o r t i o n o f b a c k r e s t1 1 2 . The l o w e r end o f b a c k r e s t 1 1 2 i s p i v o t a l l y mounted t ot h e s w i n g a b le s u p p o r t l i n k s 80 t p i v o t p o i n t 1 1 4 .

As can be s e e n i n FIG. 6 , w h e n t h e s e a t bottom frame 76 i st i l t e d upwardly t o nonuse p o s i t i o n , t h e extended arms 8 4 a r ep i v o t e d d o w n w a r d l y a n d t h e s l i d i n g b l o c k s 8 6 a b u t t h e s t o pmember 1 0 0 . Spaced a b o v e b l o c k 86 i s t h e l o w e r end 102 o fp u s h r o d 1 0 4 . End 102 e x t e n d s downwardly from an u p p e rl i m i t s t o p 116 a t t h e upper end o f s l i d e 8 8 . B a c k r e s t 112 a t i t supper and lower ends i s r e c e s s e d w i t h i n t h e r e c e s s 72 and t h eouter s u r f a c e of t h e s e a t frame 76 i s ?ush with t h e outer s u rf a c e 70 o f t h e s t r u c t u r a l w a l l . As can be s e e n upon i n s p e c t i o no f b o t h F I G . 5 and F I G . 6 , a s t h e s e a t bottom frame 76 p i v o t so u t w a r d l y and t h e e x t e n d e d arm 84 moves u p w a r d l y , t h e s l i d e8 6 e n g a g e s t h e e n d 1 0 2 o f p u s h r o d 1 0 4 a n d p u s h e s u p w a r d l yt o t h e s t o p m e m b e r 116 i n s l i d e 8 8 . T h i s c a u s e s t h e s l i d e 106a t t h e upper end o f push r o d 104 t o m ove upwardly i n g u i d e1 0 8 a n d , b e c a u s e t h e b a c k r e s t 1 1 2 i s p i v o t e d a t p o i n t 1 1 4 t o

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4s u p p o r t l i n k s 8 0 , t h e l i n k 1 1 0 p i v o t s o u t w a r d l y , c a u s i n g t h eupper p o r t i o n o f b a c k r e s t 112 t o move o u t w a r d l y from t h er e c e s s . C o n v e r s e l y , w h e n t h e s e a t bottom frame 76 r e t u r n sfrom t h e p o s i t i o n shown i n F I G . 5 t o t h a t i n F I G . 6 , t h e b l o c k86 no l o n g e r h o l d s t h e p u s h r o d 1 0 4 i n i t s u p p e r p o s i t i o n . Thepush r o d i s p e r m i t t e d t o drop w i t h t h e r e a r end o f l i n k 110moving d o w n w a r d l y . H e n c e , t h e u p p e r p o r t i o n o f s e a t r e s t 1 1 2moves i n w a r d l y .

H a v i n g d e s c r i b e d i l l u s t r a t i v e e m b o d i m e n t s o f h i s i n v e n t i o n ,i t i s t o be understood t h a t o t h e r v a r i a t i o n s a r e p o s s i b l e andt h a t t h e s e d e v i a t i o n s from t h e embodiments u s t d e s c r i b e d a r et o b e c o n s i d e r e d a s p a r t o f t h e p r e s e n t i n v e n t i o n .I c l a i m :

1 . A a b i n a t t e n d a n t s e a t c o m p r i s i n g :s i d e s u p p o r t s a d a p t e d t o b e mounted n u p r i g h t p o s i t i o n ,s w i n g i n g s u p p o r t l i n k s h a v i n g u p p e r e n d s p i v o t a l l y m o u n t e d

t o s a i d s i d e s u p p o r t s ,a s e a t backrest connected t o s a i d l i n k s ,a s e a t b o t t o m f r a m e h a v i n g r e a r w a r d l y e x t e n d i n g a r m s , s a i df r a m e b e i n g p i v o t a l l y mounted t o l o w e r e n d s o f s a i d l i n k s ,l o w e r v e r t i c a l l y o r i e n t e d g u i d e s on s a i d s i d e s u p p o r t s

a d a p t e d t o m a i n t a i n t h e e n d s o f s a i d arms i n v e r t i c a lmovement

a push r o d o p e r a b l y connected t o s a i d arms f o r v e r t i c a lmovement t h e r e w i t h ,a n u p p e r v e r t i c a l l y o r i e n t e d g u i d e on s a i d s i d e s u p p o r t s

a d a p t e d t o m a i n t a i n t h e u p p e r end o f s a i d p u s h r o d i ns u b s t a n t i a l l y v e r t i c a l movement.

2 . A cabin attendant s e a t a s i n claim 1 wherein a h e a d r e s t i smounted o n s a i d s i d e s u p p o r t s a n d a d a p t e d f o r s u b s t a n t i a l l yv e r t i c a l m ovement upon a c t u a t i o n o f s a i d p u s h r o d b y v e r t i c a lm o v e m e n t of a i d ends of a i d a r m s .

3 . A a b i n a t t e n d a n t s e a t a s i n c l a i m 2 wherein s a i d h e a d r e s th a s s u b s t a n t i a l l y v e r t i c a l s l o t s and s a i d s i d e s u p p o r t s h a v eg u i d e p i n s t h e r e o n e x t e n d i n g i n t o s a i d s l o t s t o g u i d e movement o f s a i d h e a d r e s t .

4 . A a b i n a t t e n d a n t s e a t a s . i n c l a i m 3 wherein s a i d s l o t s ext e n d f r o m downwardly a n d f o r w a r d l y t o u p w a r d l y and r e a rw a r d l y t o t h e r e b y p o s i t i o n s a i d h e a d r e s t i n i t s downward p o s it i o n over the top p o r t i o n o f a i d b a c k r e s t .

5 . A a b i n a t t e n d a n t s e a t a s i n c l a i m 1 wherein an a i r s p r i n gi s m ounte d t h e r e t o t o b i a s s a i d s e a t bottom frame armsd o w n w a r d l y .

6 . A a b i n a t t e n d a n t s e a t a s i n c l a i m 1 wherein s t o p means sp r o v i d e d t o l i m i t t h e upward movement o f s a i d e n d s o f s a i da r m s.

7 . A a b i n a t t e n d a n t s e a t a s i n c l a i m 1 w h e r e i n v e r t i c a l l y adj u s t a b l e s t o p means l i m i t s downward movement o f s a i d e n d so f a i d arms.

8 . A a b i n a t t e n d a n t s e a t a s i n c l a i m 1 , s a i d b a c k r e s t b e i n gp i v o t a l l y mounted a t i t s l o w e r end t o s a i d s u p p o r t l i n k s , and al i n k p i v o t a l l y c o n n e c t e d t o t h e t o p p o r t i o n o f s a i d b a c k r e s tand t o t h e u p p e r end o f s a i d p u s h r o d whereby v e r t i c a l m ovement o f s a i d push rod c a u s e s forward and rearward m o v e m e n to f s a i d b a c k r e s t t o p p o r t i o n .

9 . A a b i n a t t e n d a n t s e a t a s i n c l a i m 1 wherein s a i d s i d e supp o r t s a r e p o s i t i o n e d w i t h i n a r e c e s s i n a w a l l s t r u c t u r e having af r o n t s u r f a c e , means f o r m o v i n g s a i d b a c k r e s t r e a r w a r d l y o fs a i d f r o n t s u r f a c e and i n t o s a i d r e c e s s w h e n s a i d s e a t bottomf r a m e i s p i v o t ed u p w a r d l y , s a i d means m o v i n g s a i d b a c k r e s tf o r w a r d l y from s a i d r e c e s s when s a i d s e a t bottom frame i sp i v o t e d d o w n w a r d l y f o r u s e .

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