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US 4,009,888 AGranted
Self-contained power chuck with centrifugally balanced jaws
AssigneeCushman Industries, Incorporated
InventorWalter Wallace
Life of this patent
Estimating the term…
Abstract
A chuck having radially movable jaws and axially extending jaw-operating levers pivotally mounted intermediate their ends to form shorter and longer arms, of which the shorter arms are operatively connected with the jaws, and the longer arms provide counterbalances for the jaws and are in follower engagement with wedge surfaces on an inward flange formation on a sleeve piston in an outer ring-shaped power cylinder which lengthwise is more or less coextensive with the jaw-operating levers.
Claims6
A chuck providing jaws;
- a body having a longitudinal axis and a front face with ways for guiding said jaws for movement radially of said axis;
- a cylinder chamber in said body cross-sectionally ring-shaped about said axis;
- a sleeve-type piston in said cylinder chamber;
- levers pivoted in said body about axes normal to said body axis and providing on opposite sides of their pivot axes first and second arms extending substantially longitudinally of said body axis, of which said first arms are operatively connected with said jaws, respectively, and said second arms are spaced closer from said body axis than said cylinder chamber;
- a drawhead on and projecting inwardly from said piston and having cam surfaces inclined to said body axis, with said second lever arms having follower surfaces in engagement with said cam surfaces, respectively, for moving said jaws into and from gripping engagement with work on movement of said piston in opposite directions;
- and weights on said second lever arms for centrifugally balancing said jaws.
3 more elements
Dependencies are inferred from the claim text.