Material or article handling – Stock pulling or pushing – With fluid pressure actuated pushing or pulling means
Patent
1988-06-23
1989-05-09
Werner, Frank E.
Material or article handling
Stock pulling or pushing
With fluid pressure actuated pushing or pulling means
83467R, 269329, 198345, 198634, B23Q 526
Patent
active
048284467
ABSTRACT:
A pneumatically operated stop for advanced workpiece comprises a pneumatic cylinder with a displaceable piston rod on which a stop is secured. A limit stop coacting with the extended piston rod defines the setpoint position of the stop. A precision limit switch for sensing the setpoint position of the stop generates a command signal when the stop moves away from its setpoint position. This signal controls a valve which is connected with the pneumatic cylinder. This valve connects the pneumatic cylinder in an unpressurized manner with the ambient atmosphere when the stop is occupying the setpoint position and no workpiece is resting against the stop. Once the stop has been displaced from its setpoint position by an advanced workpiece, pressure is applied to the cylinder by this valve in order to return the stop together with the workpiece to the setpoint position, and this pressure is maintained for a preselected amount of time by the valve.
REFERENCES:
patent: 3049349 (1962-08-01), Siglow
patent: 3113767 (1963-12-01), Halberstadt
patent: 3155242 (1964-11-01), Magloire
patent: 3656791 (1972-04-01), Truesdell
patent: 4344609 (1982-08-01), Bond
patent: 4409979 (1983-10-01), Nowak
Chr. Eisele Maschinenfabrik GmbH & Co. KG
Evans John C.
Hienz William M.
Werner Frank E.
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