43 and 53 such as nuts and bolts pins rods and similar means at one end and are pivotally secured to cam follower arm 48 and 58 by pivotal securing means 45 and 55 such as similar means as to the above at the other end the lever clamping assembly controls the clamping and unclamping of clamps 20 and 30 to pipe 90 cam lever arms 44 and 54 and lever arms 42 and 52 are operated manually to open and close said clamps by manually pulling apart arms 44 and 42 and 54 and 52 clamp halves 22a and 22b and 32a and 32b open up to fit around the pipe by pushing together arms 44 and 42 and 54 and 52 said clamp halves close down around the pipe the clamped pipe is further securely locked within the closed clamps by extending cam follower arms 48 and 58 down over cam arms 44 and 54 respectively it unlocks simply by pulling up in reverse to the original release position the cam arms on the clamps are of the over center type that lock down once they have been pushed past the center point fig3 and fig4 show the clamping and unclamping procedure as.