Handling: hand and hoist-line implements – Grapple – Slideable jaws
Patent
1991-07-31
1993-07-06
Stormer, Russell D.
Handling: hand and hoist-line implements
Grapple
Slideable jaws
901 38, 279110, B25J 1500
Patent
active
052247473
ABSTRACT:
This invention relates to a chuck device with multistage degree of opening composed of an oscillating actuator acting as a driving part and an arm opening or closing mechanism installed at one end part to which an output shaft of the oscillating actuator is projected, the actuator having a plurality of oscillating vanes concentrically arranged within casings, the casing for an inner oscillating vane structure being rotatably supported in respect to the casing for an outer oscillating vane structure so as to form a rotary shaft and at the same time an oscillating vane of the outer oscillating structure is fixed to the rotary shaft. The output shaft is connected to the oscillating vane of the inner-most oscillating vane structure so as to enable its intermediate stopping to be attained, the arm opening or closing mechanism being comprised of a pair of guide rail blocks oppositely arranged in a spaced-apart relation at both sides of the output shaft while being crossed at a right angle with an extending direction of the output shaft and fixed to the end of the outer-most casing of the oscillating actuator.
REFERENCES:
patent: 1813705 (1931-07-01), Lewis
patent: 3123371 (1964-03-01), Marsden
patent: 3679221 (1972-07-01), Behrens
patent: 4529237 (1985-07-01), Gupta et al.
patent: 4696503 (1987-09-01), Collodel
patent: 4762357 (1988-08-01), Bergamo
patent: 4768821 (1988-09-01), Hucul et al.
patent: 4955653 (1990-09-01), Beals
Sueyoshi Kenichi
Tsuchiya Tatsuo
Kramer Dean J.
Kuroda Precision Industries Ltd.
Stormer Russell D.
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