Abstract: An improved shuck has one end coupling with a fabrication machine through a holding member. The chuck includes a coupling structure, a grip means and a shank. The coupling structure has a first screwing portion at one end and a fastening member at the other end. The grip means has a second screwing portion at one end engageable with the first screwing portion and a plurality of grip jaws at the other end inclined outwards. The coupling structure and the grip means are held in a through hole formed in the shank. The through hole has an internal side to form compact holding of the grip means to firmly hold a tool. After the coupling structure is anchored through the fastening member, the shank can be turned to drive the grip means to move, and the grip jaws can be expanded or contracted to release or grip the tool.

Abstract: A drill chuck having an adjustable depth stop to control an amount by which a tool bit, such as a drill or a screwdriver bit, is inserted into the drill chuck. The adjustable depth stop can include a spring, such as a conical spring, that can be coupled to a spindle of the chuck.

Abstract: A method and apparatus for coupling an attachable tool to a handle comprising a coupler device fixedly attached to the handle and having a locking structure moveable between locking and release conditions and being carried by a coupler body having an inner wall defining a cavity that is accessible via a cavity dimensioned and shaped to receive the attachable tool and having a first locking member for cooperative abutting engagement with the attachable tool to temporarily move the locking structure to its release condition when the attachment shaft is inserted into the cavity and a second locking member for cooperative engagement with the locking structure when the attachment shaft is inserted substantially into the cavity and the locking structure is moved to the locking position to inhibit removal of the attachment shaft from the cavity.

Abstract: A chuck for drilling and chiseling tools and including a receiving sleeve at least one through-opening formed in a sleeve wall at least one locking member supported for a limited pivotal movement about a pivot axis, which extends substantially perpendicular to a longitudinal axis of the receiving sleeve, and projecting at least partially into the through-opening (12) of the sleeve with the locking member (6) extending in its locking position through the through-opening (12) into a receiving sleeve inferior, a guide ring surrounding the receiving sleeve and at least partially overlapping the locking member (6) in its locking position, preventing the locking member (6) from pivoting into its release position and an actuation sleeve (7) displaceable in a direction opposite to an operational direction of the tool against a spring-biasing force for enabling pivoting of the locking member (6) into the release position, with the locking member (6) being pivotally connected with the actuation sleeve (7).

Abstract: A rotary clamping device is used to clamp an investment casting within a cleaning center to permit cutting and cleaning of the investment from the casting. The clamping device includes a piston and cylinder unit which is advanced to shift a clamping assembly into clamping relation with an investment casting, and is retracted to release the clamping assembly. Hydraulic pressure is used to advance piston rod of the piston and cylinder unit, and pneumatic pressure is used to retract the piston rod. Rotary drive means are connected to the clamping device for selectively rotating the same in clockwise and counterclockwise directions.

Abstract: The invention relates to a clamping device used for making up or breaking apart joints of drill pipe, drill collars and the like in mouse hole pipe during oil drilling operation. A clamping means of the device firstly clamps the drill pipe therebetween during its moving down and centripetally simultaneously by the self-weight of drill pipe to be clamped, then tightly clamps the drill pipe with a force generated by rollers' moving inwardly to the center of the device along the concavity of the turning plate with the rotation of a kelly. It can be used instead of a back tong when making-up joint in mouse hole pipe with a tong.

Abstract: A rotary tool holder for use with an automatic or semi-automatic tool grinding machine is disclosed. The tool holder includes a rotating collet and spindle. The spindle is driven through a torque limiting coupling for protection against lock up. A shaft is connected to the spindle through the torque limiting coupling which includes a disc spring made up of a plurality of concave-convex shaped discs in frictional engagement with the shaft and the spindle. The disc spring will slip at a given torque during lock up. A fluid responsive collet actuator is provided for automatic opening and closing of the collet.

Abstract: A chuck mechanism includes an axially fixed part-positioning pilot coaxially surrounded by a fixed hollow closure sleeve. A cylindrical carrier slides within the sleeve and carries a plurality of part-engaging jaws. A dual area piston is pressure-operated and coupled to the carrier to move the carrier to open and close the jaws.

Abstract: A chuck assembly which is adapted for quick and easy engagement and disengagement with work arbors having various working tools mounted thereon. The chuck assembly comprises an elongate cylindrical chuck member having a longitudinal bore extending therethrough. One end of the chuck member is adapted to be attached to the shaft of a drive motor and the other end is adapted to receive a work arbor in concentric engagement therewith. Means are provided in combination with the chuck member for positively locking the work arbor in engagement with the chuck member when the chuck member and arbor are in rotational movement about their longitudinal axes. When the chuck assembly is at rest, the arbor is easily and quickly disengaged from the chuck member by moving the locking means to its disengaging position and pulling the arbor from the end of the chuck member.

Abstract: A rotary cylinder has a tubular drive shaft to one end of which is connected a collet holder and to the other end of which is connected an adjustable stop mechanism. A drive rod extends through the shaft and is connected at one end to a collet and at the other end to a fluid operated reciprocal drive mechanism.