Plastic article or earthenware shaping or treating: apparatus – Press forming apparatus having opposed press members
Patent
1989-01-30
1990-09-04
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Press forming apparatus having opposed press members
100258A, 100269R, 425451, 425DIG47, B29C 4332, B30B 1524
Patent
active
049540688
ABSTRACT:
A hydraulic press has a generally horizontal press plate vertically movably supported in a press stand; a hydraulic press cylinder unit mounted in the press stand above the press plate and having a power cylinder and a piston rod longitudinally slidably received in the power cylinder and extending from the power cylinder to the press plate; and a hydrostatic floating bearing assembly arranged on a surface of the press plate. The lower terminus of the piston rod projects into a hydraulic chamber of the bearing assembly. The latter includes an annular body surrounding the piston rod terminus and being coaxial therewith; and a sealing ring positioned between the annular body and the surface of the press plate. The sealing ring sealingly engages the annular body and the press plate surface and has a working inner diameter which is smaller than the diameter of the lower terminus of the piston rod.
REFERENCES:
patent: 2809543 (1957-10-01), Zeitlin
patent: 3208373 (1965-09-01), Bachelier
patent: 3587138 (1971-06-01), Bammert
patent: 3716323 (1973-02-01), Classen
patent: 3825386 (1974-07-01), Bello et al.
patent: 3921286 (1975-11-01), Petersen
patent: 3994540 (1976-11-01), Petersen
patent: 4076780 (1978-02-01), Ditto
patent: 4445840 (1984-05-01), Kenmochi
patent: 4457684 (1984-07-01), Gram
patent: 4759280 (1988-07-01), Malashenko
Bushey C. Scott
Fried. Krupp Gesellschaft mit beschrankter Haftung
Woo Jay H.
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