Metal deforming – With means to drive tool – Including cam-actuated support
Reexamination Certificate
2008-11-14
2009-12-29
Jones, David B (Department: 3725)
Metal deforming
With means to drive tool
Including cam-actuated support
C072S443000, C074S025000, C074S049000, C074S490100, C074S66500G, C083S548000, C083S628000, C083S629000, C100S273000, C100S282000, C100S283000, C100S292000
Reexamination Certificate
active
07637139
ABSTRACT:
A continuous working system of a press machine includes a ram, an operation shaft which vertically moves the ram, and a servo motor which operates as a power source of the ram and which generates ram pressure using a torque based on at least one speed-torque characteristic of a motor. The operation shaft is directly driven using the servo motor. The operation shaft is continuously reciprocated and turned through an angle range corresponding to a distance between a predetermined lower end position required for press working by the ram and an upper end position such that the ram vertically moves between these positions by the servo motor, thereby subjecting a work to a continuous press working. The upper end position is set to a position slightly below a medium height of the entire vertically possible stroke of the ram. The lower end position is set to a position slightly above a bottom dead center of the entire vertically possible stroke of the ram.
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English language Abstract of DE 19548439.
English language Abstract of DE 19810406 A1.
English Language Abstract of JP54-105716.
English language Abstract of JP 8-47279.
English Language Abstract of JP08-108229.
English Language Abstract of JP08-215896.
English language Abstract of JP 10-328891.
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English Language Abstract of JP2001-062591.
English Language Abstract of JP 2001-062596.
English Language Abstract of JP2001-276467.
English Language Abstract of JP 2002-210600.
U.S. Appl. No. 12/271,439 to Naito et al., which was filed on Nov. 14, 2008.
Kuriyama Haruhiko
Naito Kinshiro
Otake Toshiaki
Sekiyama Tokuzo
Amada Company Limited
Greenblum & Bernstein P.L.C.
Jones David B
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