Patent ID: 8499484

Claim:
A mounting assembly for attachment to a rail, the assembly comprising: a. a base comprising a first rail-engaging surface; b. a clamp rotatably mounted to the base by a pivot and comprising a second rail-engaging surface, the clamp being pivotable with respect to the base to move the second rail engaging surface between an engaged position engaging a rail between the first and second rail-engaging surfaces and a disengaged position disengaging a rail, the clamp being biased toward its engaged position; and c. a locking mechanism having a locked position locking the clamp in its engaged position and an unlocked position permitting the clamp to move between its engaged and disengaged positions; wherein the locking mechanism comprises a plunger, a cam, and an actuator for the cam, the plunger being located between the cam and the clamp, the cam having a locked position, locking the plunger against the clamp, and an unlocked position, allowing the clamp to move the plunger, and the actuator being operatively connected to the cam to move the cam between its locked and unlocked positions.