Handling: hand and hoist-line implements – Utilizing fluid pressure – Venturi effect
Patent
1981-11-24
1983-06-21
Thomas, Alexander S.
Handling: hand and hoist-line implements
Utilizing fluid pressure
Venturi effect
209905, 414627, 428136, 428137, 4283084, 4283105, 4283227, 4283066, B66C 102, B32B 312, B32B 324, B32B 308
Patent
active
043890644
ABSTRACT:
The invention relates to suction prehension devices without flap valves. In particular, it relates to a suction prehension device without flap valve of the type including a case (1) connected to a suction cluster and whose base (5) is constituted of a perforated plate having on its exterior face a layer of porous material (3), such as a plastic material foam having, facing the perforations of the said plate, openings (4,6) passing through it from one side to the other, characterized in that the internal surfaces of the openings (4,6) is covered by a sealing or semi-permeable layer (12). Preferably, the sealing or semi-permeable layer (12) is constituted of a bituminous or rubbery coating.
S.A. Joulin Sema
Thomas Alexander S.
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