Patent ID: 6039522
Filing Date: 2000-03-21
Classification: B60P

Abstract:
A shoring bar comprising elongated first and second telescopingly interconnected tubes, a spring biased actuator interposed between said tubes selectively biasing said tubes longitudinally to increase the shoring bar length, said actuator including elongated first and second elements connected to said first and second tubes, respectively, spring means interposed between said elements longitudinally biasing said elements away from each other, a locking detent mounted upon one of said elements selectively movable between locking and release positions cooperating with a shoulder defined on the other element whereby engagement of said detent and said shoulder occurs in said locking position and retains said elements in a retracted position and disengagement of said detent and said shoulder occurs in said release position and permits said elements to be biased to an extended position, stops defined on said elements limiting relative movement of said elements in said extended position, and a detent shifter fixed with respect to said other element moving said detent between said locking and release positions upon relative axial movement of said elements in a retracting direction.