Door hinge with built-in preloaded torsion bar hold-open means

Claim 1

IN A HINGE COMPRISING A GENERALLY CHANNEL-SHAPED OUTER HINGE MEMBER PROVIDING VERTICALLY SPACED TOP AND BOTTOM WALLS AND AN INNER HINGE MEMBER DISPOSED BETWEEN SAID TOP AND BOTTOM WALLS AND PIVOTALLY CONNECTED THERETO BY A SUBSTANTIALLY VERTICAL PINTLE, ONE OF SAID HINGE MEMBERS BEING ADAPTED TO BE SECURED TO A BODY AND THE OTHER TO A DOOR SWINGABLE TO AND FROM OPEN POSITION RELATIVE TO THE BODY ABOUT THE SUBSTANTIALLY VERTICAL PINTLE AXIS, THE INNER HINGE MEMBER HAVING LATERALLY SPACED SUBSTANTIALLY PARALLEL INNER AND OUTER END PORTIONS AND A TRANSVERSE INTERMEDIATE CONNECTING PORTION, THE IMPROVEMENT WHICH CONSISTS IN THE PROVISION OF A SUBSTANTIALLY VERTICAL TORSION BAR THAT IS GENERALLY J-SHAPED MOUNTED ON ONE SIDE OF THE INTERMEDIATE PORTION OF SAID INNER HINGE MEMBER, THE TORSION BAR HAVING A RADIUS ARM ON ONE END OF THE VERTICAL LEG OF THE J, SAID RADIUS ARM HAVING ON THE OUTER END THEREOF A SUBSTANTIALLY VERTICAL DETENT PROJECTING FROM ONE EDGE OF SAID INTERMEDIATE PORTION OF SAID INNER HINGE MEMBER, A STRIKER ON ONE OF THE TOP AND BOTTOM WALLS OF THE OUTER HINGE MEMBER, THE STRIKER ENGAGING THE DETENT TO DEFLECT THE RADIUS ARM OF THE TORSION BAR AND GO PAST SAID DETENT IN THE DOOR OPENING AND CLOSING MOVEMENT OF THE HINGE MEMBERS RELATIVE TO ONE ANOTHER FOR A HOLD-OPEN ACTION, THE OTHER END OF SAID TORSION BAR REMOTE FROM SAID RADIUS ARM WHEN FREE BEING NORMALLY IN A VERTICAL PLANE AT AN ANGLE TO THE VERTICAL PLANE OF SAID RADIUS ARM AND DETENT, AND MEANS SECURING SAID J-SHAPED PORTION OF THE TORSION BAR WITH ALL PORTIONS THEREOF SUBSTANTIALLY PARALLEL TO THE TRANSVERSE PORTION OF SAID INNER HINGE MEMBER TO PROVIDE A PRELOAD SPRING TENSION IN SAID BAR, THE DETENT BEING MOVABLE WITH ITS RADIUS ARM RELATIVE TO THE INNER HINGE MEMBER UPON ENGAGEMENT WITH THE STRIKER ONLY IN A DIRECTION TO INCREASE SUCH SPRING TENSION IN SAID BAR.