Umbrella stroller with upper safety bar release mechanism

A stroller comprising:

• a pair of side frames each side frame including a lower portion having a rear supporting leg and an upper portion by which the stroller can be pushed;
• bottom scissor frame means for foldably connecting said side frames together;
• lower articulated safety spreader bar means for releasably locking said lower portion of said side frames in a spaced apart, open configuration, said lower articulated safety spreader bar means being connected to said lower portion of said side frames for pivotal movement in a first direction from a locked position to an unlocked position, and vice versa, said lower articulated safety spreader bar means including a pair of lower pivoting spreader bars, each pivotally connected at one end to a respective said side frame and to a central position at opposite ends thereof, and lower releasable locking means for releasably locking said pair of lower pivoting spreader bars in a locked position in which said lower portions of said side frames are maintained in said spaced apart, open configuration;
• upper articulated safety spreader bar means for releasably locking said upper portion of said side frames in a spaced apart, open configuration, said upper articulated safety spreader bar means being connected to said upper portion of said side frames for pivotal movement in said first direction from a locked position to an unlocked position, and vice versa, said upper articulated safety spreader bar means including a pair of upper pivoting spreader bars, each pivotally connected at one end to a respective said side frame and to a central position at opposite ends thereof, and upper releasable locking means for releasably locking said pair of upper pivoting spreader bars in a locked position in which said upper portions of said side frames are maintained in said spaced apart, open configuration;
• and
• release bar means connected between one of the upper and one of lower pivoting spreader bars of the upper and lower articulated safety spreader bar means adjacent at least one side frame for automatically moving said upper articulated safety spreader bar means from the locked position to the unlocked position thereof when said lower articulated safety spreader bar means is moved from the locked position to the unlocked position thereof.