Power plants – Pressure fluid source and motor – Cyclically operable reciprocating or oscillating motor or...
Patent
1975-01-20
1976-03-02
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Cyclically operable reciprocating or oscillating motor or...
60383, 60421, 60486, 60DIG2, 100269R, 425451, F15B 1307, F16D 3100
Patent
active
039409309
ABSTRACT:
A fixed platen is supported in the machine frame, and a movable platen is connected to two parallel rods which project rearwardly through the fixed platen. Each rod carries a first piston and each piston is slidably received in a first cylinder. These cylinders are slidably received on the rods and each cylinder has a forward end defining a second larger piston slidably received in a fixed second cylinder. The front and rear faces of the smaller pistons are selectively connected to fluid from a first pump through a synchronizing valve, and a paralleling pump supplements the flow from the first pump during synchronization, that is during the major part of the mold opening and closing movement. Slower movement is provided for just prior to the platen reaching the mold open and closed positions. The larger piston is fed high pressure fluid from still another pump at the mold closed position to clamp the molds closed, a power check valve being provided to seal fluid between the first piston and the second during such clamping action.
REFERENCES:
patent: 2569226 (1951-09-01), Carter
patent: 3081659 (1963-03-01), Theobald
patent: 3183556 (1965-05-01), Studli
patent: 3472026 (1969-10-01), Conabee
patent: 3673926 (1972-07-01), Mohri
patent: 3722366 (1973-03-01), Richardson
patent: 3756145 (1973-09-01), Amacker
Geoghegan Edgar W.
Package Machinery Company
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