Underactuated mechanical finger with return actuation

Details Underactuated mechanical finger with return actuation Underactuated mechanical finger with return actuation

1996-07-16

1998-06-09

Kramer, Dean

Handling: hand and hoist-line implements

Grapple

Pivoted jaws

294907, 901 33, 901 39, B25J 1510

Patent

active

057623902

ABSTRACT:
This invention provides a finger with three phalanges and three degrees of freedom for a flexible and versatile mechanical gripper which uses only a limited number of actuators. The finger is robust, can provide large grasping forces and can perform power grasps as well as pinch grasps. The mechanism used in the finger has an additional mechanism maintaining the last phalanx orthogonal to the palm in order to allow the gripper to perform pinch grasps on objects of different sizes. For purposes of fine control, tactile sensors as well as potentiometers are included in the finger. The mechanical gripper designed using these fingers allows the stable grasping of a wide class of objects while specifying only two coordinates (the force or position for closing the whole finger and the orientation of the finger) for each of the fingers. The mechanical gripper has three fingers and three phalanges per finger. When performing a grasp, the fingers will progressively envelope the object to be grasped and eventually reach a static equilibrium. Underactuation between the fingers of the gripper is also possible.

REFERENCES:
patent: 3694021 (1972-09-01), Mullen
patent: 3866966 (1975-02-01), Skinner, II
patent: 3901547 (1975-08-01), Skinner, II
patent: 3927424 (1975-12-01), Itoh
patent: 4377305 (1983-03-01), Horvath
patent: 4834443 (1989-05-01), Crowder et al.
patent: 4980626 (1990-12-01), Hess et al.
patent: 4984951 (1991-01-01), Jameson
patent: 4986723 (1991-01-01), Maeda
patent: 5080681 (1992-01-01), Erb
patent: 5108140 (1992-04-01), Bartholet
patent: 5200679 (1993-04-01), Graham
patent: 5280981 (1994-01-01), Schulz
patent: 5378033 (1995-01-01), Guo et al.
Shimojima, H., Yamamoto, K. and Kawakita, K., "A study of Grippers With Multiple Degrees of Mobility", JSME International Journal, vol. 30, No. 621, pp. 515-522, 1987.
Crowder, R.M., "An Anthropomorphic Robotic End Effector", Journal of Robotics and Autonomous Systems, vol. 7, No. 4, pp. 253-268, Nov. 1991.
G. Guo, X. Qian and W.A. Gruver, "A Single-DOF Multi-Function Prosthetic Hand Mechanism with an Automatically Variable Speed Transmission", Proceedings of the ASME Mechanisms Conference, Phoenix, vol. DE-45, pp. 149-154, 1992.
M. Rakik, "Multifingered Robot Hand with Selfadaptability", Robotics and Computer-Integrated Manufacturing, vol. 5, No. 2-3, pp. 269-276, 1989.

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