Handling: hand and hoist-line implements – Utilizing fluid pressure – Venturi effect
Reexamination Certificate
1999-08-10
2001-06-12
Kramer, Dean J. (Department: 3652)
Handling: hand and hoist-line implements
Utilizing fluid pressure
Venturi effect
C294S907000
Reexamination Certificate
active
06244640
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention concerns a suction gripping device and any similar device of this type which automatically signifies the picking up of an object.
SUMMARY OF THE INVENTION
The device of the invention, which includes a nozzle connected to a suction source, is characterized in that the nozzle is mounted sliding with play on the end of the suction tube and in that it includes stops to limit the travel of the nozzle towards the inside and outside, as well as means to indicate that the nozzle occupies its extreme internal position.
When no object is picked up by the device of the invention, an amount of air is sucked up from the outside by means of the play existing between the tube and the nozzle, and, via a laminar effect, tends to move towards the outside the nozzle which comes into its external stop position. When the opening of the nozzle is blocked off by an object, even partially, this object is sucked up and drives towards the inside the nozzle which comes into its extreme internal position which indicates the picking up of an object.
In a particular embodiment of the invention, the device includes a cylindrical body comprising a transversal wall in which the suction tube is fitted on and against which the nozzle stops when it moves towards the inside.
The gripping device of the invention can be used in an extremely wide range of applications, such as in the food, mechanical, electronic or pharmaceutical industries.
REFERENCES:
patent: 4189137 (1980-02-01), Denney et al.
patent: 4266905 (1981-05-01), Birk et al.
patent: 4640503 (1987-02-01), Naumann
patent: 4651396 (1987-03-01), Kerlidou
patent: 4662668 (1987-05-01), Hufford
patent: 4763941 (1988-08-01), Sniderman
patent: 5308132 (1994-05-01), Kirby et al.
patent: 5572785 (1996-11-01), Tveit
patent: 6065789 (2000-05-01), Nagai et al.
patent: 2604-984 (1988-04-01), None
Le Bricquer Gérard
Vezinet Alain
Dubno Herbert
Kramer Dean J.
Societe Opema S.A.
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