Beds – Sofa bed – Reverting back
Patent
1990-04-23
1991-08-13
Grosz, Alexander
Beds
Sofa bed
Reverting back
5 181, 5 48, A47C 1716, A47C 1717
Patent
active
050384236
ABSTRACT:
A motorized convertible seat-bed to electrically shift the seat-bed from between its seat position and its bed position. The seat-bed including a drive unit and a pair of mounting plates connected to a seat support and back support pivotally interconnected by a pivot pin. The drive unit including a worm gear and slide assembly having a worm gear follower wherein rotation of the worm gear causes the slide assembly to shift along a longitudinal track carried by the frame side of the seat bed. A pivoted drive arm is interconnected between the slide assembly and the pivot pin such that as the slide assembly is shifted from its fully extended position to its fully retracted position the drive arm applies an upward force on the pivot pin to pivot the plates and supports into a bed position. When the slide assembly is shifted to a fully extended position by the worm gear the hinged drive arm applies a downward force on the pivot pin to pivot the pivot plates and supports about the bolt and shift the seat-bed into its upright seat position.
REFERENCES:
patent: 3458877 (1969-08-01), Edwards
patent: 4563784 (1986-01-01), Shrock et al.
patent: 4654902 (1987-04-01), Shrock et al.
Grosz Alexander
Hall James D.
Shrock Manufacturing, Inc.
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