Motors: expansible chamber type – Relatively movable working members with one having motive... – One working member forms movable chamber for another
Patent
1992-06-12
1993-03-09
Denion, Thomas E.
Motors: expansible chamber type
Relatively movable working members with one having motive...
One working member forms movable chamber for another
91189A, 92 62, 92 65, 92110, 92151, 92152, F01B 720, F01B 700
Patent
active
051918250
ABSTRACT:
A low-impact drive unit operates by air under pressure. It includes aligned working and pressure chambers. The working chamber contains a working piston and a working piston rod extending from an end of the chamber. The pressure chamber contains a rear outer piston having a cylindrical recess and a central bore. An inner piston is located in the cylindrical recess and has a main piston rod extending through the bore, a bore in a separator separating the chambers, and is affixed to the working piston, so as to move together. The main rod has a longitudinal passage which supplies air from the pressure chamber to the back of the working piston under certain conditions. After the working piston rod contacts a workpiece, force of air pressure on all three pistons act on the working piston rod. An air return passage is provided to return the various components to their initial position after the working operation is complete.
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Beneteau David M.
Dolata Mark J.
Denion Thomas E.
Doben Limited
Gutchess, Jr. Allen D.
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