Retractable, air pressure actuated hold-down clamp

Details Retractable, air pressure actuated hold-down clamp Retractable, air pressure actuated hold-down clamp

1991-07-18

1992-09-29

Valenza, Joseph E.

Classifying, separating, and assorting solids

Sifting

Elements

209372, 1988605, 248500, 292 6, 292 45, 292201, 292247, B07B 100

Patent

active

051507960

ABSTRACT:
Disclosed is a clamp for securing the cover of a screening machine. The clamp is air pressure operated, both to apply clamping force and to retract or swing the clamp out of the way when it is open. Super-atmospheric pressure is applied for clamping; subatmospheric pressure is applied to swing the clamp away. Multiple clamps may be simultaneously operated by pressure or vacuum from a common manifold.

REFERENCES:
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patent: 2776854 (1957-01-01), Billstrom
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patent: 3113352 (1963-12-01), Gibbs et al.
patent: 3368711 (1968-02-01), Dubo
patent: 3433357 (1969-03-01), Nolte
patent: 3797882 (1974-03-01), Brimhall
patent: 4093176 (1978-06-01), Contastin
patent: 4230023 (1980-10-01), Ward

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