Patent ID: 7856685
Filing Date: 2010-12-28
Classification: A61G

Abstract:
1. A stretcher, comprising: an upper frame for loading a litter on its support portion having castors on its front-legs and rear-legs, the frame including a front-leg auxiliary frame supporter slidably engaged with front-leg auxiliary frame sliding pipes, a front-leg supporter slidably engaged with front leg sliding pipes, and a rear-leg auxiliary frame supporter slidably engaged with rear-leg auxiliary frame sliding pipes; a constant force spring in a slide mechanism for vertically changing the position of the upper frame; a front-leg assembly including a front-leg frame and a front-leg auxiliary frame; a rear-leg assembly including a rear-leg frame and a rear-leg auxiliary frame; a first mechanical locking device coupled to the front-leg auxiliary frame supporter for controlling the movement thereof; a second mechanical locking device coupled to the front-leg supporter for controlling the movement thereof; a third mechanical locking device coupled to the rear-leg auxiliary frame supporter for controlling the movement thereof; and first and second levers cooperatively releasing the first, second and third mechanical locking devices wherein the first lever is coupled to the second mechanical locking device and the second lever is coupled to both the third mechanical locking device and a releasable pin of the first mechanical locking device; wherein each of the first second and third mechanical locking devices engage a guide pipe define insertion openings therethrough for slidingly receiving respective sliding pipes, and include at least one roller in rolling contact with a center rail of the stretcher.