Patent ID: 7921487

Claim:
In a lever actuated spring mechanism for a bed platform which swings upwardly to a bed platform out of use position and downwardly to a bed platform in use position, said bed platform having a stationary bed platform receiving structure, the combination of a spring mechanism fixed to the stationary bed platform receiving structure, said spring mechanism enabling the bed platform to be positioned in a generally vertical position and a generally horizontal position, and all positions there between, said spring mechanism including a base member fixed to the stationary bed platform receiving structure, which base member remains stationary in all positions of the bed platform from generally vertical to generally horizontal, a lever pivotally connected to the stationary base member, means for fixedly connecting the bed platform to the lever in all positions of the bed platform with respect to the stationary base member including the beginning connection of the bed platform to the spring mechanism, tension springs, said tension springs being anchored at their first ends to the stationary base member and at their other ends to a spring anchor, said first ends of the tension springs remaining spatially fixed in all positions of the bed platform from generally vertical to generally horizontal, and mechanical adjustment means on the spring anchor located between the other ends of the tension springs and the lever, said mechanical adjustment means being operable by a tool which is held at a location remote from the spring anchor for adjusting the position of the lever to the stationary base member in all positions of the lever with respect to the stationary base member, said mechanical means including, spaced, aligned, internally threaded bosses on the spring anchor, and a threaded eye-bolt which is pivotally connected at its eye end to the lever at a pivot location which lies above the pivot connection of the lever to the stationary base member, the inner threaded end of the threaded eye-bolt being received in the spaced, aligned internally threaded bosses.