CROSSBAR CLAMP ACTUATOR

1 . A vehicle rack for carrying cargo, comprising:

a clamp having a seat and a connector movable relative to the seat; and

a clamp actuator including a threaded member engaging a traveling wedge block, and a wedge follower contacting a surface of the wedge block, wherein rotation of the threaded member causes movement of the wedge block and the wedge follower in relatively different directions.

2 . The vehicle rack of claim 1 , wherein the traveling wedge block has a ramped, downward-facing first slide surface, and

the wedge follower is coupled to and movable with the crossbar connector, the wedge follower having a second slide surface in frictional contact with the first slide surface of the traveling wedge block, such that substantially horizontal repositioning of the traveling wedge block causes the ramped first slide surface to urge the wedge follower downward, moving the crossbar connector downward relative to the crossbar seat.

3 . The vehicle rack of claim 2 , wherein the first slide surface of the traveling wedge block is a substantially planar surface.

4 . The vehicle rack of claim 3 , wherein the ramped first slide surface defines a first ramp angle, and the second slide surface is ramped at a second ramp angle complementary to the first ramp angle.

5 . The vehicle rack of claim 2 , wherein the threaded member is inserted into an end of the traveling wedge block, such that rotation of the threaded member is configured to cause the horizontal repositioning of the traveling wedge block.

6 . The vehicle rack of claim 2 , wherein the traveling wedge block is horizontally repositionable parallel to a long axis of a crossbar.