Abstract: A hydraulic chuck haging a piston means with an axially centered fluid passage and a tube seating means on one end thereof. Collet means are provided and are mounted on the piston means such that axial movement of the piston means operates the collet means. The chuck body is slideably mounted on the piston means and has a nose cone means fixedly mounted on the body means. The nose cone means includes a collet engaging surface to close the collet upon engagement of the surface and the collet means. Seal means for preventing passage of fluid between the tube and the collet means are provided and include a seal cartridge means adjacent to tube seating means on the piston means. Seal seat means are slideably contacting the cartridge means and keyed to the collet means to define a seal cavity between the seal seat and the seal cartridge. The cavity has a first size when the collets are open and a smaller second size when the collets are closed.

Abstract: A hydraulic chuck having a piston means with an axially centered passage, the first end of which has a tube seating means associated therewith for engaging a tube. Collet means are provided and located at the first end of the piston means for engagement of the tube upon closure of the collet means. Biasing means operably connected to the piston means for normally forcing the surface means upon the collet means are also provided. Sealing means adjacent to tube feeding means for sealing the tube to the chuck, including seal seat means adjacent to collets and positioned to compress the seal radially inward under pressure of the biasing means, are provided. Finally, the handle or attachment means is provided to operably connect to the biasing means to remove the surface means from the collet means, thereby releasing the radially inward compression of the sealing means and permitting insertion of the tube.

Abstract: A hydraulic chuck having a piston means with an axially centered passage and a first end sized to engage a tube. Collet means are located at the first end of the piston for engagement with said tube upon closure of the collet means. Surface means bearing on the collet means are provided to close the collet on the tube. Biasing means are provided to normally force the surface means against the collet means to incur a normally closed position of the collet. A handle or attachment means is provided for movement of the biasing means to remove the surface means from the collet means whereby the tube may be inserted into the chuck. Finally, passage defining means in the piston means are provided to force the surface means onto the collet means when fluid is passed through the axially centered passage.