Power operated rotatable clamping assembly

Rotatable clamping apparatus, comprising:

• a support including an upstanding plate portion;
• a fluid operated cylinder assembly mounted on the rear face of said plate portion and extending axially and rearwardly from said rear face;
• a clamping mechanism rotatably mounted on the front face of said plate portion and including a clamping member rotatable about the longitudinal axis of said cylinder assembly to any of a plurality of angular clamping positions upon rotation of said clamping mechanism, said clamping mechanism further including cam means for shifting said clamping member between a released position and a clamping position;
• means, including a piston rod forming a part of said cylinder assembly and extending through said plate portion, for drivingly connecting said cam means with said cylinder assembly;
• and
• means for selectively locking said clamping mechanism in any of said plurality of angular clamping positions.

Clamping apparatus, comprising:

• a support;
• a piston and cylinder assembly including a reciprocable output rod, said piston and cylinder assembly being mounted on said support for rotation about the longitudinal axis of said rod;
• a bracket mounted for rotation with said piston and cylinder assembly on said support, said bracket including an annular shoulder slideably engageable with said support, said bracket further including an opening in one end thereof and guide slot axially aligned with said opening, said rod extending through said opening into said guide slot;
• means for selectively clamping said shoulder against said support whereby to lock said bracket in any of a plurality of rotational positions relative to said support;
• a pair of transversely spaced plate members connected together and respectively pivotally mounted on opposite sides of said bracket, each of said plate members including a clamping arm and having a cam track defined therein;
• and,
• a pair of transversely spaced cam members secured to one end of said rod and respectively disposed within said cam tracks.