Abstract: Pipe chucking apparatus comprises:A. a tubular mandrel,B. driver means to engage the exterior of the mandrel and rotate same,C. a work pipe to be rotated relative to a forming tool,D. jaws on the mandrel and releasably coupled to the bore of the work pipe,E. actuator means within the mandrel to displace the jaws into and out of coupling engagement with the bore of the work pipe.

Abstract: Apparatus to unscrew a rotary part from a second part, as for example to remove a securing ring from a telephone receiver, comprises:A. first means to receive the second part in position for unscrewing of the rotary part which faces downwardly,B. second means to releasably grip and rotate the rotary part in an unscrewing direction while the second part is in said position, and subsequently to release the unscrewed rotary part,C. third means to block rotation of the second part while the rotary part is rotated in unscrewing direction relative to the second part,D. said first and second means located to allow the unscrewed and released rotary part to drop free of the second means, for collection.

Abstract: Apparatus for grooving pipe extending longitudinally axially comprises:A. a transversely elongated frame adapted to be displaced transversely relative to the pipe axis,B. a grooving roller having an annular boss to swage the groove in the pipe, and a back-up roller having an annular recess in transverse alignment with said boss, said rollers carried by the frame,C. and means to bodily and progressively displace one of the rollers relatively toward the other roller to cause the boss to progressively form the groove in the pipe wall being rotated between the rollers, the two rollers being rotated in response to pipe rotation.

Abstract: A solid substance is cleaned by a vapor cleaning method. In the method, a cleaning vessel which is opened to the atmosphere at its top is used. A hazardous solvent is vaporized at the bottom of the vessel and cooling coils within the vessel condense the vapors as they travel upwardly to the open top. The solid substance to be cleaned is placed in a zone where the vapors are condensing. The invention resides in blanketing the top of the condensing vapors with an inert gas which is less hazardous than the volatile solvent thereby forming a buffer layer between the atmosphere and the solvent. The gas has a density at the conditions existent within the buffer layer which is greater than the density of air at ambient conditions, and has a boiling point below the boiling point of the solvent.