Handling: hand and hoist-line implements – Utilizing fluid pressure – Venturi effect
Patent
1991-07-17
1992-07-07
Cherry, Johnny D.
Handling: hand and hoist-line implements
Utilizing fluid pressure
Venturi effect
13762525, 251297, 251321, 251347, 251348, B25J 1506, F16K 3314, F16K 3504
Patent
active
051276941
ABSTRACT:
A vacuum manipulator having a spool valve mounted in a sliding fashion in a guide channel at the bottom of which are two holes in communication with two duct segments with one segment intended to be connected to a suction source, and a longitudinal guide channel connected to the spool valve for placing the holes in communication with the atmosphere, and a bearing surface of the spool valve with the bottom of the guide channel being limited to three zones which provide a high specific vacuum while also providing a large seating and guide area, and the spool valve being movable against the pressure applied by a spring between a front span and a back stop which may also define a third locking position.
REFERENCES:
patent: 2777462 (1957-01-01), Hohnstein
patent: 3071402 (1963-01-01), Lasto et al.
patent: 3455533 (1969-07-01), Epp
patent: 3834388 (1974-09-01), Sauer et al.
patent: 3843183 (1974-10-01), Hutson
patent: 4522592 (1985-06-01), Johnson
patent: 4618178 (1986-10-01), Hutson et al.
Cherry Johnny D.
The Triangle Tool Group
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