Work holders – With fluid means – Cylinder-piston means in series with additional positioning...
Patent
1982-03-26
1985-01-29
Watson, Robert C.
Work holders
With fluid means
Cylinder-piston means in series with additional positioning...
269 93, 269 94, 269233, B23Q 308
Patent
active
044961383
ABSTRACT:
A power operated clamp includes a cylinder having a reciprocal piston rod. A hollow body is aligned with and connected to the cylinder and mounted upon a support. The body includes a pair of spaced side plates at their one ends secured to the cylinder. The piston rod extends into the body. A clamp arm is pivotally mounted upon the body and in one position is adapted to retainingly engage a workpiece relative to a workpiece support. A linkage is pivotally connected to the clamp arm; the improvement which comprises a series of vertically spaced pairs of longitudinally spaced transverse mount holes extending through the side plates. The mounting of the body includes an upright riser extending between the side plates and has a series of longitudinal similarly spaced apertures corresponding to some of the side plate apertures. Pivot bolts extend through some of the side plate apertures and riser, whereby the body may be mounted in one of a plurality of longitudinal locations relative to the riser. The side plates upon their interiors have a pair of opposed guide slots. An elongated rod end within the body is axially connected to the piston rod. A pair of longitudinally spaced front and rear pivot slide pins supportably extend transversely through the rod end and at their ends are slidably mounted within the side plate slots. The linkage includes a pair of links interconnecting the rod end and clamp arm. An apertured protrusion block extends from and transversely of the rod end between the side plates and outwardly thereof. A pre-stop spans and is secured to the side plates and is spaced from and aligned with the clamp arm, is adapted for retaining engagement with the clamp arm when moved to workpiece retaining position. The linkage may be in the form of a cantilever connected to a clamp arm support and to one or more supplemental clamp arms for controlling their movements relative to a workpiece.
REFERENCES:
patent: 3570835 (1971-03-01), McPherson
patent: 3618931 (1971-11-01), Blatt
patent: 4021027 (1977-05-01), Blatt
patent: 4396183 (1983-08-01), Lymburner
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