发明名称 |
Counterforce and holding device |
摘要 |
A counterforce cylinder and piston exert an upward force on the vertically movable slide of a machine. The cylinder pressure line handles reverse flows during operations of the slide. A pilot-operated checkvalve (normally closed) is inserted in the cylinder line between a pressure source and the counterforce cylinder, and is held open during usual operation of the machine. An accumulator is branch-connected to the cylinder line, at a point between the checkvalve and counterforce cylinder. During machine operations, the accumulator stores pressurized fluid; at shutdown of power, the fast-acting checkvalve closes and reliably seals the cylinder line while the accumulator provides pressure to maintain the counterforce cylinder and slide in a substantially constant holding position for several days.
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申请公布号 |
US5303549(A) |
申请公布日期 |
1994.04.19 |
申请号 |
US19910740280 |
申请日期 |
1991.08.05 |
申请人 |
CINCINNATI MILACRON INC. |
发明人 |
BERCHTOLD, MERRILL E.;VALVANO, DEAN M. |
分类号 |
B23Q11/00;E21B19/086;F15B1/02;F15B20/00;(IPC1-7):F16B31/02 |
主分类号 |
B23Q11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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