Agitating – Rubber or heavy plastic working – With specified discharge means
Patent
1993-10-27
1995-07-18
Scherbel, David A.
Agitating
Rubber or heavy plastic working
With specified discharge means
366192, 277 3, 425201, 425204, B28C 716, B01F 1502
Patent
active
054335221
ABSTRACT:
A hydraulic control device for a closed type kneader, including a sealing surface pressure applying circuit for applying a sealing surface pressure to a sealing device for sealing a rotor accommodated in a kneading chamber, a drop door driving circuit for controlling an opening and closing operation of a drop door for closing a bottom surface of the kneading chamber, and a power circuit for supplying a pressure oil to the sealing surface pressure applying circuit and the drop door driving circuit. The sealing surface pressure applying circuit is connected to a pressure oil supply line in the drop door driving circuit for a closed condition of the drop door. Accordingly, when the application of the sealing surface pressure is unnecessary, that is, when the drop door is opened, the sealing surface pressure is prevented from being applied to the sealing device, thereby extending the life of the sealing device.
REFERENCES:
patent: 2615689 (1952-10-01), Schnuck
patent: 2972774 (1961-02-01), MacLeod
patent: 3005229 (1961-10-01), Walther
patent: 3282592 (1966-11-01), Cymbalisty
patent: 4412747 (1983-11-01), Moriyama
patent: 4818113 (1989-04-01), Patel
patent: 5061078 (1991-10-01), Yada
Chin Randall E.
Kabushiki Kaisha Kobe Seiko Sho
Scherbel David A.
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