Importance

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Abstract

A clamp for securing ground-glass joints between first and second tubes, the first tube having a shoulder located inward of its end, intermediate the ground and unground portions thereof, adjacent the ground joint, and the second tube having an enlarged lip located at its end adjacent the ground joint and the shoulder of the first tube. The clamp has an mounting portion and an attaching portion having first and second parts for accommodating the shoulder and the enlarged lip therebetween, followed by a releasing portion. The mounting portion connects the first and second parts and has forward ends extending substantially symmetrically along a longitudinal axis of the clamp. The forward ends of the mounting portion are biased toward one another by the clamp. The first part of the attaching portion is an attaching collar for partially fitting around the circumference of the first tube adjacent the shoulder rearwardly of the transverse axis. The second part is disposed below the first part and is adapted to engage the second tube at locking points located substantially symmetrically on the periphery of the second tube, forwardly of a transverse axis of the clamp for locking together the first and second tubes. The releasing portion is adapted to manually force apart the mounting portion and transfer the contact between the second part and the second tube from the locking points located forwardly of the transverse axis to releasing leverage points located rearwardly of the transverse axis so that the clamp easily slides off the joint. The releasing portion provides a mechanical advantage to open the clamp and can include loop portions for great comfort.

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First Claim