Powered sofa convertible into bunk bed

A sofa convertible into a bunk bed comprising:

• a base frame assembly;
• a upper bunk assembly configured to be disposed on said base frame assembly in a seating position and to be disposed above said base frame assembly in a bunk bed position;
• a rear link pivotally attached to said base frame assembly and said upper bunk assembly;
• a screw drive mounted to said base frame assembly configured to rotate a drive nut for moving said upper bunk assembly;
• and
• a drive motor configured to provide power for said screw drive to rotate;
• wherein a first end of said rear link is pivotally attached to said upper bunk assembly and a second end of said rear link is pivotally attached to said base frame assembly;
• a rear timing arm is secured to said rear link;
• a first end of said rear timing arm is secured to said second end of said rear link at a substantially right angle and said first end of said rear timing arm is pivotally attached to a timing link;
• a front link is pivotally attached to said base frame assembly and said upper bunk assembly;
• a first end of said front link is pivotally attached to said upper bunk assembly and a second end of said front link is pivotally attached to said base frame assembly;
• a front timing arm is secured to said front link;
• a first end of said front timing arm is secured proximate said second end of said front link at a substantially right angle and said first end of said front timing arm is pivotally attached to said timing link;
• said timing link is pivotally attached to said front timing arm and pivotally attached to said rear timing arm;
• a first end of said timing link is pivotally attached to a second end of said front timing arm and a second end of said timing link is pivotally attached to a second end of said rear timing arm;
• said timing link maintains said front timing arm and said rear timing arm in parallel so that said front link and said rear link to move in parallel;
• said screw drive formed and arranged to raise and lower said upper bunk between a bunk bed position and a seating position.
• said front link, rear link and timing link forming a first link assembly on a first side;
• a second link assembly comprising a mirror image of said first link assembly is formed and arranged on a second said of said sofa
• a timing tube interconnecting said first link assembly and said second link assembly.