Work holders – With fluid means – Cylinder-piston means in series with additional positioning...
Patent
1976-05-17
1977-05-03
Smith, Al Lawrence
Work holders
With fluid means
Cylinder-piston means in series with additional positioning...
B23Q 308, B25B 114
Patent
active
040210278
ABSTRACT:
In a fluid power operated clamp which includes a cylinder, piston and piston rod and connected thereto a bifurcated housing mountable upon a support. The housing includes a pair of spaced body plates with their outturned ends secured to said cylinder. A pivot bolt extends between forward portions of said body plates, and pivotally mounted thereon is a clamp arm, in one position of adjustment adapted to retainingly engage a workpiece relative to said support. A pair of links at their one ends bear against opposite sides of the clamp arm and are pivotally connected thereto. The improvement for the foregoing clamp which comprises a rod end coaxial of the piston rod interposed between and guidably bearing against the body plates and axially connected to the piston rod. Forward portions of the rod end are machined to provide an extension of reduced width. The other ends of the links bear against opposite sides of the extension. A pressure pivot pin extends through said links and rod end extension. An opposed pair of elongated internal slots are formed along the length of said body plates. The free ends of the pressure pivot pin are flattened at their tops and bottoms for sliding non-rotative movement within and along said internal slots. A further improvement includes machining of the clamp arm to provide a section of reduced width. The said one ends of said links bearing against said section of reduced width. A further improvement includes spaced tubular spacers interposed between and engaging rearward portions of the body plates with fasteners extending therethrough and a further spacer interposed between and bearing against interior portions of said body plates, extending through the said one ends of said links and through said clamp arm.
REFERENCES:
patent: 2600584 (1952-06-01), Snell
patent: 3482831 (1969-12-01), Blatt
patent: 3702185 (1972-11-01), Blatt
Smith Al Lawrence
Watson Robert C.
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