Material or article handling – Vertically swinging load support – Grab
Patent
1979-06-13
1983-04-05
Scherbel, David A.
Material or article handling
Vertically swinging load support
Grab
414735, B25J 304
Patent
active
043789595
ABSTRACT:
An apparatus for performing a work function on a workpiece comprising a stationary base, a rotatable base mounted on the stationary base, a hydraulically actuated mechanism for rotatably displacing the rotatable base relative to the stationary base, a lower arm member pivotally mounted on the rotatable base, a hydraulically actuated mechanism for angularly displacing the lower arm member relative to the rotatable base, an upper arm member pivotally mounted on the lower arm member, a hydraulically actuated mechanism for angularly displacing the upper arm member relative to the lower arm member, a wrist assembly mounted on the upper arm member, a hand member universally mounted on the wrist assembly, a hydraulically actuated mechanism for angularly displacing the hand member relative to the wrist assembly, a mechanism disposed on the hand member for mounting a work tool, the stationary and rotatable bases including a rotary fluid slip ring assembly, and an assembly for transmitting fluid between the stationary base and the hydraulically actuated mechanism through the fluid slip ring assembly for operating the hydraulically actuated assembly. The rotatable base is rigidly secured to the rotary fluid slip ring assembly.
REFERENCES:
patent: Re28089 (1974-07-01), Devol
patent: 3330056 (1967-07-01), Woodside et al.
patent: 3543910 (1970-12-01), Devol
patent: 3630389 (1971-12-01), Schmidt
patent: 3840128 (1974-10-01), Swoboda et al.
patent: 4012069 (1977-03-01), Carson
patent: 4024961 (1977-05-01), Stolpe
patent: 4076131 (1978-02-01), Dahlstrom et al.
Scherbel David A.
Thermwood Corporation
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