Swing-arm clamp

1. A swing-arm clamp comprising:

an actuator;

a piston movable in response to the actuator;

a body having the piston movable therein;

a piston rod located within the body and extending from the piston;

wherein the piston rod is movable through the body in response to movement by the piston along a longitudinal axis between first and second positions; and

wherein the piston rod is also movable about the longitudinal axis as it is movable along the longitudinal axis;

an arm attached to the piston rod being movable both along the longitudinal axis between the first and second positions, and about the longitudinal axis;

a guide;

a locating member located exterior of the body and movable in concert with the piston rod;

wherein the locating member engages the guide when the arm is located in the first position and separates from the guide when in the second position.

2. The swing-arm clamp of claim 1 , wherein the first position of the arm and piston rod is a clamping retracted position.

3. The swing-arm clamp of claim 1 , wherein the second position is the releasing extended position.

4. The swing-arm clamp of claim 1 , wherein the guide is attached to the body.

5. The swing-arm clamp of claim 4 , wherein the guide is adjustable with respect to the body.

6. The swing-arm clamp of claim 1 , further comprising a plug attachable to the body and movable with respect thereto.

7. The swing-arm clamp of claim 6 , wherein the plug is selectively positionable to affect the positioning of the piston rod about the longitudinal axis at the first and second positions.

8. The swing-arm clamp of claim 7 , wherein the plug can be selectively locked in a desired position.

9. The swing-arm clamp of claim 7 , wherein the plug is located in a bore in the body.

10. The swing-arm clamp of claim 9 , wherein the plug further comprises a threaded periphery that is engagable with a threaded periphery on the bore.

11. The swing-arm clamp of claim 10 , wherein the plug further comprises a set that secures the plug in a desired position.

12. The swing-arm clamp of claim 11 , wherein the plug further comprises a spline disposed therein and the set being a fastener disposed in the plug and engagable with the spline such that engagement of the spline secures the plug in the desired position.

13. The swing-arm clamp of claim 12 , wherein the spine of the plug is disposed in the plug's threaded periphery.

14. The swing-arm clamp of claim 1 , wherein the locating member is attached to the arm.

15. The swing-arm clamp of claim 1 , further comprising a shield that shrouds the piston rod when the same is in its first position.

16. The swing-arm clamp of claim 15 , wherein the locating member is attached to the shield.

17. The swing-arm clamp of claim 1 , wherein the locating member is an angled member, one end of which extends into the guide when the piston rod is located in the first position.

18. A swing-arm clamp comprising:

an actuator;

a body;

a rod disposed in the body, movable longitudinally in response to the actuator, and rotatable with respect to its longitudinal movement;

wherein the rod is at least partially extendable from the body;

a clamp arm attached to the rod; and

an arm attached to the piston rod being movable both along the longitudinal axis between a first and second positions, and about the longitudinal axis;

a guide located exterior of the body;

a locating member movable in concert with the piston rod; and

wherein the locating member engages the guide when the arm is located in the first position and separates from the guide when in the second position.

19. The swing-arm clamp of claim 18 , wherein the rod is movable between first and second positions.

20. A swing-arm clamp comprising:

a body;

a piston assembly disposed in the body and movable longitudinally

with respect to the body;

a cam member having a camming surface disposed therein being in communication with the piston assembly to cause movement of the piston assembly askew of its longitudinal movement; and

a base attached to the cam member;

wherein the base is selectively movable to affect the askew movement of the piston assembly;

the base comprises a lock that will selectively maintain the base at a desired position;

the base is located in a bore disposed in the body; and

the base comprises a threaded periphery that is engagable with a corresponding threaded periphery of the bore.

21. The swing-arm clamp of claim 20 , wherein the lock is a fastener.

22. The swing-arm clamp of claim 20 , wherein the base further comprises a spline disposed therein, wherein the fastener is engagable with the spline such that engagement of the spline by the fastener secures the plug in the desired position.

23. The swing-arm clamp of claim 22 , wherein the spline of the base is disposed in the threaded periphery of the base.