Adjustable work support
AssigneeOwatonna Tool Company
InventorsJames C. Solie, Samuel B. McClocklin
Life of this patent
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Abstract
An adjustable work support having a work supporting plunger adjustable to a position for support of a workpiece and having two sets of locking pins with one set being movable with respect to the other along with the work supporting plunger and selectively operable means for exerting a horizontal force against the sides of the two series of pins to provide frictional engaging forces between locking pins to resist the vertical force of the load of the workpiece against the adjustable work support.
Claims10
An adjustable work support comprising a casing with a cylindrical open-ended chamber, a plunger having a cylindrical stem movable lengthwise in said chamber and an end outside said casing for work-supporting engagement, said chamber having a diameter greater than said stem to provide a space therebetween, a series of round locking pins in said space in side-to-side contact, every other pin movable with the stem and the remaining pins held against movement with the stem, a driving pin positioned between two of said locking pins, and means for exerting a force on said driving pin to force said two locking pins apart and exert a compressive force on said locking pins one against the other to hold the stem in adjusted position.
An adjustable work support having a casing with an open-ended cylindrical chamber, a work-supporting plunger extending out from the casing and with a stem movable lengthwise within said chamber to various adjusted positions, said chamber having a diameter greater than said stem to have a chamber wall at a distance from the stem, a first series of stationary pins and a second series of movable pins disposed alternately one to the other between the chamber wall and the stem, means movable with the stem for causing said second series of pins to move with the stem, means associated with the casing for holding the first series of pins in position against the bottom of said chamber, said two series of pins having a length less than the height of the chamber and all being at approximately the same level when the stem is fully depressed in said chamber, and selectively operable means for urging said two series of pins tightly against each other and the chamber wall to hold the work-supporting plunger against movement under load.
Dependencies are inferred from the claim text.