Suction device

Details Suction device Suction device

1996-01-25

1997-11-18

Bucci, David A.

Handling: hand and hoist-line implements

Utilizing fluid pressure

Venturi effect

271103, 414797, B65G 5904

Patent

active

056880081

ABSTRACT:
A suction device for gripping an article has a sucker (1) with a suction lip (12). The sucker is movable between inner and outer positions in the inlet end (2) of a suction line and can be moved angularly. A reset element (3) moves the sucker to its outer position. In the inner position, the sucker forms a sealing connection with the inlet end. In its outer position, leakage air flow can pass around the outside of the sucker and into the suction line. When the sucker is in its outer position and the suction lip is closed by an article to be gripped, a pre-depression of pressure less than the maximum suction is caused because of the leakage flow. As the result of that pre-depression, the sucker is moved to its inner position, causing a sealing connection between the sucker and the inlet end of the suction line. The depression is then increased, increasing the suction grip on the article.

REFERENCES:
patent: 2850279 (1958-09-01), Stoothoff et al.
patent: 3223442 (1965-12-01), Fawdry et al.
patent: 4189137 (1980-02-01), Denney et al.
patent: 4763941 (1988-08-01), Sniderman
patent: 5172922 (1992-12-01), Kowaleski et al.

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