Abstract: A chuck device includes a first worm gear mechanism linked to a second worm wheel mechanism which operate in tandem to receive, increase, and redirect an input rotational drive force. A conversion mechanism receives and further augments the force from the second worm gear mechanism and converts the drive force into an axial force. The conversion mechanism transfers the axial force symmetrically to a pair of claw members. The claw members move relative to each other and firmly secure a work item to the chuck device.

Abstract: The present invention is directed to a chucking system. The body of the chucking system preferably houses cam plates which may be driven manually by an independent worm shaft, or hydraulically by a piston/gear rack in lieu of a worm shaft. A face plate preferably houses four master jaws. The jaws may be engaged to the cam plates by pins. The jaws may be moved inward and outward preferably by rotation of the cam plates due to the ascending/descending slope of the slots in the cam plates. Each set of two jaws may be driven independently of the other because of the two separate cam plate mechanisms. The top cam plate is preferably held concentrically to the bottom cam plate by a needle bearing. The entire cam plate may “sandwich” pivot on a center tube which may be anchored in the base of the body and the top face plate.

Abstract: A chuck device has a pair of grippers pivotally supported in a recess defined in an end of a body for angular movement about a predetermined angle, a joint member connected to a piston reciprocally movably disposed in a cylinder chamber defined in the body, and a pair of rollers engaging respectively in grooves in the grippers and angularly movably mounted on the joint member. Linear movement of the piston can be transmitted as angular movement to the grippers through the rollers while the rollers are angularly moving with respect to the joint member. A cover is mounted on the end of the body in closing relation to the recess.