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(11) | EP 2 116 151 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Adjustable spiral mattress supporting base with trapping safeguard |
(57) A spiral mattress supporting base comprises a fixed lower frame (1) and an upper
frame (2) which is mounted directly upon the fixed lower frame (1) and which comprises
movable upper frame members (4-6). The upper frame (2) has upper longitudinal sections
(11-13, 20) and traverse members (14, 15) extending transversely between the longitudinal
sections, between which upper longitudinal sections (11-13, 20) a network (24) of
interlocked helical springs is spanned. The lower frame (1) has lower longitudinal
sections (16). The transverse distance between the lower longitudinal sections (16)
is smaller than the transverse distance between the upper longitudinal sections (11-13,
20).
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