Chairs and seats – With table – desk – or easel – Extensible from within or beneath seat component
Patent
1990-04-18
1992-02-11
Chen, Jose V.
Chairs and seats
With table, desk, or easel
Extensible from within or beneath seat component
297162, A47C 3900
Patent
active
050870963
ABSTRACT:
An unique apparatus for displacing an extensible/contractible board for a chair in case of an occurrence of emergency is disclosed. The apparatus includes a board support, an engagement piece, a turn guide plate, a stationary guide plate and an opposing pair of base members. The board assumes a horizontal attitude during normal use. In case of emergency, an excessive magnitude of outer force in excess of resilient force derived from Belleville springs is imparted to the board by an user's hand so that the engagement piece is disengaged from the turn guide plate via operative engagement of an eccentric projection on the board shaft with an engagement recess on the engagement piece. This causes the board to be displaced from the horizontal attitude to a vertical attitude, whereby a sufficiently wide space is provided in front of the user so as to enable him to quickly escape from his chair. When the board is not in use, the board is received in a hollow space defined by an opposing pair of sleeve plates below one elbow rest of the chair.
REFERENCES:
patent: 936017 (1909-10-01), McClelland
patent: 1093686 (1914-04-01), Cogger
patent: 1649761 (1927-11-01), Vinggrad
patent: 1731293 (1929-10-01), Chapman
patent: 3269772 (1966-08-01), Brunskole
patent: 3547488 (1970-12-01), Barnes
patent: 3632161 (1972-01-01), Arfaras
patent: 4852940 (1989-08-01), Kanigowski
patent: 4944552 (1990-07-01), Harris
Chen José V.
Kabushiki Kaisha Kotobuki
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