Abstract: A jaw assembly is provided for chucks. The assembly includes a master jaw mounted to a chuck for movement toward and away from the rotational axis. The master jaw includes a plurality of stepped apertures extending into the front face and parallel to the rotational axis. Each stepped aperture defines a mounting seat adjacent the front face and a threaded portion extending rearwardly from the mounting seat. Mounting buttons include stems that are press-fit into the mounting seats of the master jaws. Frustums project from the stems and away from the front face of the master jaw. The mounting buttons include apertures extending entirely therethrough and registered with the threaded portion of the stepped aperture in the master jaw. A top jaw is mounted to the front face of the master jaw. The top jaw has a plurality of apertures extending therethrough and registered with the apertures through the mounting buttons.

Abstract: A chuck assembly for high speed operations is provided. The workpiece gripping and releasing functions of the chuck are carried out pneumatically by a nonrotating air tube assembly extending through a bore in a machine tool to which the rotating chuck is mounted. The chuck is mounted to a portion of a machine tool for rotation therewith and is rotatably disposed over an air journal rigidly mounted to the nonrotating air tube assembly. Selective direction of compressed air causes relative movement between a piston mounted in a cylindrical work chamber of a chuck body. Relative movement between the piston and chuck body causes movement of an actuator having a wedge which is engages a generally annular clamping assembly.

Abstract: A chuck assembly is provided for high speed operations. The chuck includes a body about which a piston is securely mounted. A cylinder and cover are slidably mounted relative to the piston and body. Master jaws are slidably disposed within the chuck body. An actuator ring surrounds the master jaws and the chuck body. The actuator ring limits deformation of the master jaws and enables a stronger chuck body that will not deform in response to centrifugal forces. Weights can be mounted in the chuck assembly to be urged against the cylinder at high rotational speeds and thereby to further prevent loosening of the chuck assembly.

Abstract: A gripper apparatus is provided for use with a robotic device. The apparatus includes a plurality of master jaws pivotally mounted to a housing and radially aligned with respect to one another. Appropriately shaped grippers are mountable on each master jaw. Rotational movement of the master jaws is effected by an actuator piston slidably disposed within the housing. The actuator piston is moved in response to hydraulic or pneumatic fluid selectively directed into the housing.

Abstract: A fluid actuated chuck is disclosed wherein the piston-cylinder drive assembly is rotationally immobile relative to the chuck body. More particularly, a fluid actuated chuck is disclosed having a cylindrical body adapted to be rotated about its central axis and including radially movable master jaws. An actuator ring is provided which is operatively connected to the master jaws of the chuck body in a manner such that the axial movement of the actuator means effects the radial movement of the master jaws. A reciprocating piston-cylinder drive assembly is rotatably mounted about the chuck body and is capable of generating a force directed axially along the chuck body. A radial thrust bearing is interconnected between the piston-cylinder drive assembly and the actuator ring to transmit the axially directed forces generated by the drive assembly to the actuator ring. In operation, fluid pressure is used to actuate the piston-cylinder drive assembly.

Abstract: A multi-jaw chuck having a centrifugally-actuated attachment for counterbalancing the adverse effect of centrifugal force on the chuck jaws during high speed operation. The chuck attachment includes an annular, hollow housing coaxially mounted on the chuck body and a lever associated with each of the jaws of the chuck which is pivotally mounted in the housing for pivotable movement about an axis parallel to the chuck body axis. Each of the levers includes a first pivot arm, disposed on one side of the pivot axis, for engagement with the jaw associated therewith and a second pivot arm, disposed on the other side of the pivot axis. The second arm has an effective length and weight such that it moves outwardly from the axis of the chuck body as a result of the centrifugal force developed upon rotation of the chuck body and, in turn, urges the first arm into engagement with the jaw associated therewith.

Abstract: An elastomeric cover for a chuck having movable jaws. The cover effects isolation of the chuck from the ambient environment while permitting jaw movement.FIELD OF THE INVENTIONThis invention relates to a seal or cover and more particularly it relates to a cover for a machine chuck designed to isolate the chuck from the ambient environment.BACKGROUND OF THE INVENTIONIn grinding or polishing various stock and particularly glass lenses it is often times desirable to immerse the same in an abrasive fluid. To do so the lens is placed in a precision fixture or chuck and then both of them are immersed in the abrasive liquid. A grinding element is then likewise immersed in the abrasive bath and brought into contact with the glass to effect the shaping or polishing thereof. Yet as is apparent the chucks designed to hold and support the glass indeed, precision chucks generally, require the utmost tolerance to insure proper lens shaping or part forming if that be the case.