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Convertible seat-bed

  • US 4,001,901 A
  • Filed: 08/06/1975
  • Issued: 01/11/1977
  • Est. Priority Date: 10/02/1973
  • Status: Expired due to Term
First Claim
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1. In a convertible seat-bed assembly, a unit including a generally rectangular back having generally parallel opposite top and bottom edge portions, back support means supporting said back for movement between an inclined seating position in which said top edge portion thereof is in a first position spaced upwardly and rearwardly with respect to said bottom edge portion thereof and a bed position in which said top edge portion thereof is in a second position spaced rearwardly from and in horizontal alignment with said bottom edge portion thereof, a generally rectangular seat having generally parallel forward and rearward edge portions, seat support means supporting said seat for movement between a rearward seat position in which said rearward edge portion thereof is disposed below and behind said bottom edge portion of said back when said back is in said first position and a forward bed position in which said rearward edge portion thereof is contiguous to said bottom edge portion of said back with the upper surface of said back and seat then being in a common horizontal plane, said back support means comprising arm means pivotal about a first horizontal axis below said back and pivotally connected to said back on a second horizontal axis, first link means pivotally connected to said seat on a third horizontal axis and pivotally connected to said arm means on a fourth horizontal axis, and second link means pivotally connected to said first link means on the fifth horizontal axis and pivotally connected to said back on a sixth horizontal axis, said second horizontal axis being spaced a first predetermined distance from said first horizontal axis and being on the rearward side of said back and spaced a second predetermined distance from said bottom edge portion of said back, said fourth horizontal axis being spaced a third predetermined distance from said second horizontal axis and said sixth horizontal axis being spaced a fourth predetermined distance from said fifth horizontal axis, the relationship between said first, second, third and fourth predetermined distances being such that said top edge portion of said back is moved in a substantially vertical path between said first and second positions thereof when said seat is moved forwardly and rearwardly between said rearward seat and forward bed positions thereof.

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