A chuck apparatus includes a pair of grip members driven by a piston via a pair of levers, and the levers are rotatably supported by a body via lever shafts. A lever shaft protrudes from the attachment surface of the body to the transport device, and positioning with respect to the transport device is performed by using the protruding portion.

A retention chuck for glass pipes for machines producing glass containers is provided. The retention chuck has a central supply channel for the glass pipes, a plurality of adjustable clamping jaws arranged at the lower end of the supply channel and so as to be distributed around a centerline of the channel. The spacing of the jaws from the center line of the supply channel is adjustable by an actuation element. A coupling element couples the jaws to the actuation element. Guides guide the adjustment movement of the clamping jaws perpendicularly, radially inwardly relative to the center line.

A retention chuck for glass pipes for machines producing glass containers is provided. The retention chuck has a central supply channel for the glass pipes, a plurality of adjustable clamping jaws arranged at the lower end of the supply channel and so as to be distributed around a centerline of the channel. The spacing of the jaws from the center line of the supply channel is adjustable by an actuation element. A coupling element couples the jaws to the actuation element. Guides guide the adjustment movement of the clamping jaws perpendicularly, radially inwardly relative to the center line.

A chuck apparatus grips a workpiece by a gripping section having a pair of chuck members. The chuck apparatus is equipped with a cover member and pressing members. The cover member includes insertion holes through which fingers of the chuck members are inserted, and seal members that surround the insertion holes and abut against the fingers. The cover member is attached to a body so as to cover base portions of the chuck members, and is elastically deformable so as to follow displacement of the chuck members. The pressing members press the seal members against the fingers.

A chuck apparatus grips a workpiece by a gripping section having a pair of chuck members. The chuck apparatus is equipped with a cover member and pressing members. The cover member includes insertion holes through which fingers of the chuck members are inserted, and seal members that surround the insertion holes and abut against the fingers. The cover member is attached to a body so as to cover base portions of the chuck members, and is elastically deformable so as to follow displacement of the chuck members. The pressing members press the seal members against the fingers.