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US 4,224,146 AGranted
Sifting machines
AssigneeUnited Wire Group Limited
InventorsAnthony J. Kent, William Woodburn
Life of this patent
Estimating the term…
Abstract
In a sifting machine having a driven vibratory screen assembly comprising a so-called sifting basket of which a screen forms the base, the screen is releasably located by a plurality of spaced bars which extend across the screen and project at their ends through side walls of the basket. The projecting end portions of the bars are bolted to external supports on the side walls, and the bars carry spring-loaded plungers which press the frame of the screen against internal ledges on the side walls.
Claims5
A sifting machine having a framework;
- a sifting basket resiliently mounted on said framework for vibratory movements, said sifting basket having opposed side walls, each with an inner face and an outer face, and a base formed by a screen tensioned on a rectangular screen frame;
- clamping means releasably securing said screen frame to said side walls;
- and a drive unit for effecting vibratory movement of said sifting basket;
- said clamping means comprising at least one bar spaced above said screen and extending across said basket and having opposed end portions projecting through apertures in said side walls respectively;
- a pair of brackets on the outer faces of said side walls;
- releasable fastening devices securing said end portions of the bar to said brackets;
- a pair of ledges respectively on opposed inner faces of said side walls;
- a pair of plungers carried by said bar and resiliently clamping opposed side members of said screen frame against said ledges respectively, and spring means located between said bar and each of said brackets for moving said bar upwards, when said fastening devices are released.
5 more elements
Dependencies are inferred from the claim text.