192 clutches and power-stop control – Stop mechanism – Limit stop
Patent
1997-11-11
1999-09-14
Marmor, Charles A.
192 clutches and power-stop control
Stop mechanism
Limit stop
74526, 92 88, F16D 1104, F01B 2900, G05G 104
Patent
active
059507900
ABSTRACT:
A linear pneumatic actuator stopping and positioning apparatus has a pneumatic actuator connected to a worktable for moving the worktable along a rectilinear path as well as a selector shaft that is mounted for rotational indexing movement at one side of the actuator and is operatively associated with one or more extendible stop arms for selecting a stop arm located at a selected stop point so as to contact the worktable and stop the movement of the worktable at the stop point selected. The shaft can be mounted to allow it to be shifted along its own central axis for moving one or more sleeve members that are connected to the shaft a short distance for extending a stop arm to an operating position. In one form, a stop arm actuator and locking bar is positioned to be engaged by the sleeve and to press the stop arm to its extended position. In another form of the invention, a stop plate is mounted on the selector shaft for rotation with the shaft as the shaft is indexed one or more times through a predetermined arc for extending a lobe on the plate to an operating position in the path of the worktable to halt the worktable at a selected stop point. In a third form, the stop member is screw-threaded into a hub that is mounted on the selector shaft and can be threaded into or out of the hub for establishing a selected stop point.
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Harmon James V.
Marmor Charles A.
Pang Roger
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