Die drive unit of molding machine

Details Die drive unit of molding machine Die drive unit of molding machine

2005-10-28

2008-05-20

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Pulsator

C092S152000

Reexamination Certificate

active

07373777

ABSTRACT:
A die drive unit has a cylinder mechanism which hydraulically drives a piston member and an additional drive mechanism which drives the piston member by means of a drive source other than a hydraulic one. A first oil chamber is formed on one side of the piston member. A second oil chamber and a third oil chamber are formed on the other side of the piston member. The first oil chamber and the second oil chamber are connected to each other by an oil passage. The piston pressure receiving area of the first oil chamber is equal to the sum of those of the second and third oil chambers.

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Chinese Office Action; Application No. 200510119230.0, mailed Jan. 4. 2008.
English Translation of Chinese Office Action; Application No. 200510119230.0, mailed Jan. 4, 2008.

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