Convertible seat-bed

• US 3,913,152 A
• Filed: 10/02/1973
• Issued: 10/21/1975
• Est. Priority Date: 10/02/1973
• Status: Expired due to Term

• Current Assignee: Howard M. Quakenbush
• Original Assignee: Howard M. Quakenbush
• Inventors: Quakenbush, Howard M.
• Primary Examiner(s): Frazier, Roy D.
• Assistant Examiner(s): Lyddane, William E.
• Application Number:
  US05/402,860
• Time in Patent Office: 749 Days
• Field of Search: 297/317,318,342,316,322,343 5/17,18R,37R,47,48
• US Class Current: 5/37.1
• CPC Class Codes: A47C 17/1753 by sliding, e.g. by rollers
• CPC Class Codes: A47C 17/1756 by pivoted linkages

Abstract

Convertible seat-bed unit having a seat condition in which a back is inclined with one edge portion thereof disposed rearwardly and upwardly from an opposite edge portion disposed above and forwardly from the rearward edge portion of a seat, the one edge portion of the back being movable downwardly in a substantially vertical path to a position in which the opposite edge portion of the back is contiguous to the rearward edge of the seat, the unit being then in a bed condition. Linkage means are provided including first arm means having a lower portion connected to the seat and supported by roller means movable in an inclined track and including second arm means pivotal about a fixed horizontal axis and pivotally connected to the first arm means, a pair of links being provided between the first arm means and the back and an additional link being provided between the second arm means and the back. Spring means are provided assisting movement to the seat condition and support and locking means are provided for each condition.

Claims

1. In a convertible seat-bed unit, a generally rectangular back having generally parallel opposite top and bottom edge portions, back support means supporting said back for movement between an inclined 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 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 surfaces of said back and seat then being in a common horizontal plane, said back support means being arranged for effecting movement of said top edge portion of said back in a substantially vertical path between said first and second positions thereof, said back support means comprising first arm means, means supporting a portion of said first arm means for generally horizontal movement between a rearward seat position and a forward bed position, second arm means, first pivot means supporting said second arm means for pivotal movement about a first horizontal axis in a fixed position spaced rearwardly from said rearward seat position of said portion of said first arm means, second pivot means interconnecting said first and second arm means for relative pivotal movement about a second horizontal axis spaced upwardly from and in a vertical plane intermediate said first horizontal axis and said rearward seat position of said portion of said first arm means, said second horizontal axis being moved forwardly and downwardly in an arc about said first horizontal axis in response to forward movement of said portion of said first arm means from said rearward seat position to said forward bed position, and means supporting said back from said first and second arm means comprising first linkage means between said back and said first arm means and second linkage means between said back and said second arm means, said first linkage means comprising first link means pivotally connected to said first arm means on a third horizontal pivot axis and pivotally connected to said back means on a fourth horizontal pivot axis and second link means pivotally connected to said first arm means on a fifth horizontal pivot axis and pivotally connected to said back on a sixth horizontal pivot axis, and said second linkage means comprising third link means pivotally connected to said second arm means on a seventh horizontal pivot axis and pivotally connected to said back on an eighth horizontal pivot axis.

2. In a unit as defined in claim 1, said sixth and eighth axes being a common axis.

3. In a unit as defined in claim 1, stop means supported in fixed relation to said first and second horizontal axis and disposed in the path of movement of said second arm means for limiting movement of said second arm means in response to forward movement of said portion of said first arm means.

4. In a unit as defined in claim 3, interengaging stop means on said first and second arm means for limiting relative pivotal movement of said first and second arm means to limit forward movement of said portion of said first arm means.

5. In a unit as defined in claim 1, said means supporting said portion of said first arm means comprising shaft means connected to said portion of said first arm means, roller means on said shaft means, and track means receiving said roller means.

6. In a unit as defined in claim 5, said shaft means being connected to a rearward portion of said seat.

7. In a unit as defined in claim 6, said track means being inclined upwardly and forwardly.

8. In a unit as defined in claim 1, tension spring means connected to said second arm means to urge said unit toward a seat condition.

9. In a unit as defined in claim 6, side mount plate means carrying said first pivot means and said track means.

10. In a unit as defined in claim 9, seat support means carried by said side mount plate means for engaging and supporting a forward portion of said seat in the seat condition of said unit.

11. In a unit as defined in claim 10, pin means carried by said seat and lockingly engagable with said seat support means in said seat condition of said unit.