Spring devices – Fluid – Expansible-contractible chamber device
Reexamination Certificate
2006-08-01
2006-08-01
McClellan, James (Department: 3683)
Spring devices
Fluid
Expansible-contractible chamber device
C267S130000, C188S322180, C092S16500R, C277S562000, C072S453130
Reexamination Certificate
active
07083164
ABSTRACT:
A high-pressure, inert gas cushion assembly for the ram or bolster of a metal stamping press includes a manifold having fluid-flow passages defined therein, along with a plurality of cylinder mounting locations each in communication with at least one of the fluid-flow passages. A plurality of cushion cylinders are located respectively in the cylinder mounting locations. Each cylinder includes a body having an inner wall that defines a bore of diameter D. A piston is located in the bore and includes opposite inner and outer faces, wherein the outer face is oriented outwardly relative to the bore and manifold. A fluid seal is supported on the piston and is slidably engaged with the wall defining the bore. One or more bearings are supported on the piston and slidably engaged with the inner wall that defines the bore. The bearing(s) support the piston slidably in the bore for reciprocal sliding movement between extended and retracted positions. The bearing(s) define a bearing-length L that is less than or equal to 40% of said bore diameter D.
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Gang, Jr. Terry L.
Kelm Henry J.
Lanterman Harold L.
Reilly Steven J.
Barnes Group Inc.
Fay Sharpe Fagan Minnich & McKee LLP
McClellan James
Sy Mariano
LandOfFree
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