Handling: hand and hoist-line implements – Utilizing fluid pressure – Venturi effect
Patent
1988-03-07
1989-05-09
Cherry, Johnny D.
Handling: hand and hoist-line implements
Utilizing fluid pressure
Venturi effect
417187, 417191, B66C 102, B25J 1506, F04F 548
Patent
active
048283061
ABSTRACT:
A control system for applying and releasing vacuum in a work-gripping vacuum cup includes a housing having a venturi passage for inducing a vacuum within the cup upon the flow of air through the venturi passage. A one-way check valve in a passage extending through the housing between the venturi and the vacuum cap will seal the vacuum in the cup upon cessation of flow through the venturi passage, thus enabling the cup to grip the workpiece in response to a timed pulse of air through the venturi and to maintain the grip after the air flow is stopped. A second valve controlled passage through the housing enables air under pressure to be injected into the vacuum cup to quickly release its grip on the workpiece.
REFERENCES:
patent: 2934086 (1960-04-01), Blatt
patent: 3181563 (1965-05-01), Giffen
patent: 3219380 (1965-11-01), Carliss
patent: 3349927 (1967-10-01), Blatt
patent: 3372822 (1968-03-01), Weinert
patent: 3568959 (1971-03-01), Blatt
patent: 3613904 (1971-10-01), Blatt
patent: 3712415 (1973-01-01), Blatt et al.
patent: 3716307 (1973-02-01), Hansen
patent: 4453755 (1984-06-01), Blatt et al.
patent: 4655692 (1987-04-01), Ise
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